forking.

.gitignore

@@ -1,3 +1,4 @@
+/bin
+/xgo
 dist/
-
-.idea
+.idea

builtins.go

@@ -1,4 +1,4 @@
-package tengo
+package xgo
 
 var builtinFuncs = []*BuiltinFunction{
 	{

builtins_test.go

@@ -1,11 +1,11 @@
-package tengo_test
+package xgo_test
 
 import (
 	"errors"
 	"reflect"
 	"testing"
 
-	"github.com/d5/tengo/v2"
+	"surdeus.su/core/xgo/v2"
 )
 
 func Test_builtinDelete(t *testing.T) {

bytecode.go

@@ -1,4 +1,4 @@
-package tengo
+package xgo
 
 import (
 	"encoding/gob"
@@ -6,7 +6,7 @@ import (
 	"io"
 	"reflect"
 
-	"github.com/d5/tengo/v2/parser"
+	"surdeus.su/core/xgo/v2/parser"
 )
 
 // Bytecode is a compiled instructions and constants.

bytecode_test.go

@@ -1,13 +1,13 @@
-package tengo_test
+package xgo_test
 
 import (
 	"bytes"
 	"testing"
 	"time"
 
-	"github.com/d5/tengo/v2"
-	"github.com/d5/tengo/v2/parser"
-	"github.com/d5/tengo/v2/require"
+	"surdeus.su/core/xgo/v2"
+	"surdeus.su/core/xgo/v2/parser"
+	"surdeus.su/core/xgo/v2/require"
 )
 
 type srcfile struct {

cmd/bench/main.go

@@ -4,8 +4,8 @@ import (
 	"fmt"
 	"time"
 
-	"github.com/d5/tengo/v2"
-	"github.com/d5/tengo/v2/parser"
+	"surdeus.su/core/xgo/v2"
+	"surdeus.su/core/xgo/v2/parser"
 )
 
 func main() {

cmd/xgo/main.go

@@ -6,18 +6,17 @@ import (
 	"flag"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"strings"
 
-	"github.com/d5/tengo/v2"
-	"github.com/d5/tengo/v2/parser"
-	"github.com/d5/tengo/v2/stdlib"
+	"surdeus.su/core/xgo/v2"
+	"surdeus.su/core/xgo/v2/parser"
+	"surdeus.su/core/xgo/v2/stdlib"
 )
 
 const (
-	sourceFileExt = ".tengo"
+	sourceFileExt = ".xgo"
 	replPrompt    = ">> "
 )
 
@@ -55,7 +54,7 @@ func main() {
 		return
 	}
 
-	inputData, err := ioutil.ReadFile(inputFile)
+	inputData, err := os.ReadFile(inputFile)
 	if err != nil {
 		_, _ = fmt.Fprintf(os.Stderr,
 			"Error reading input file: %s\n", err.Error())
@@ -96,7 +95,7 @@ func main() {
 // CompileOnly compiles the source code and writes the compiled binary into
 // outputFile.
 func CompileOnly(
-	modules *tengo.ModuleMap,
+	modules *xgo.ModuleMap,
 	data []byte,
 	inputFile, outputFile string,
 ) (err error) {
@@ -131,7 +130,7 @@ func CompileOnly(
 
 // CompileAndRun compiles the source code and executes it.
 func CompileAndRun(
-	modules *tengo.ModuleMap,
+	modules *xgo.ModuleMap,
 	data []byte,
 	inputFile string,
 ) (err error) {
@@ -140,45 +139,45 @@ func CompileAndRun(
 		return
 	}
 
-	machine := tengo.NewVM(bytecode, nil, -1)
+	machine := xgo.NewVM(bytecode, nil, -1)
 	err = machine.Run()
 	return
 }
 
 // RunCompiled reads the compiled binary from file and executes it.
-func RunCompiled(modules *tengo.ModuleMap, data []byte) (err error) {
-	bytecode := &tengo.Bytecode{}
+func RunCompiled(modules *xgo.ModuleMap, data []byte) (err error) {
+	bytecode := &xgo.Bytecode{}
 	err = bytecode.Decode(bytes.NewReader(data), modules)
 	if err != nil {
 		return
 	}
 
-	machine := tengo.NewVM(bytecode, nil, -1)
+	machine := xgo.NewVM(bytecode, nil, -1)
 	err = machine.Run()
 	return
 }
 
 // RunREPL starts REPL.
-func RunREPL(modules *tengo.ModuleMap, in io.Reader, out io.Writer) {
+func RunREPL(modules *xgo.ModuleMap, in io.Reader, out io.Writer) {
 	stdin := bufio.NewScanner(in)
 	fileSet := parser.NewFileSet()
-	globals := make([]tengo.Object, tengo.GlobalsSize)
-	symbolTable := tengo.NewSymbolTable()
-	for idx, fn := range tengo.GetAllBuiltinFunctions() {
+	globals := make([]xgo.Object, xgo.GlobalsSize)
+	symbolTable := xgo.NewSymbolTable()
+	for idx, fn := range xgo.GetAllBuiltinFunctions() {
 		symbolTable.DefineBuiltin(idx, fn.Name)
 	}
 
 	// embed println function
 	symbol := symbolTable.Define("__repl_println__")
-	globals[symbol.Index] = &tengo.UserFunction{
+	globals[symbol.Index] = &xgo.UserFunction{
 		Name: "println",
-		Value: func(args ...tengo.Object) (ret tengo.Object, err error) {
+		Value: func(args ...xgo.Object) (ret xgo.Object, err error) {
 			var printArgs []interface{}
 			for _, arg := range args {
-				if _, isUndefined := arg.(*tengo.Undefined); isUndefined {
+				if _, isUndefined := arg.(*xgo.Undefined); isUndefined {
 					printArgs = append(printArgs, "<undefined>")
 				} else {
-					s, _ := tengo.ToString(arg)
+					s, _ := xgo.ToString(arg)
 					printArgs = append(printArgs, s)
 				}
 			}
@@ -188,7 +187,7 @@ func RunREPL(modules *tengo.ModuleMap, in io.Reader, out io.Writer) {
 		},
 	}
 
-	var constants []tengo.Object
+	var constants []xgo.Object
 	for {
 		_, _ = fmt.Fprint(out, replPrompt)
 		scanned := stdin.Scan()
@@ -206,14 +205,14 @@ func RunREPL(modules *tengo.ModuleMap, in io.Reader, out io.Writer) {
 		}
 
 		file = addPrints(file)
-		c := tengo.NewCompiler(srcFile, symbolTable, constants, modules, nil)
+		c := xgo.NewCompiler(srcFile, symbolTable, constants, modules, nil)
 		if err := c.Compile(file); err != nil {
 			_, _ = fmt.Fprintln(out, err.Error())
 			continue
 		}
 
 		bytecode := c.Bytecode()
-		machine := tengo.NewVM(bytecode, globals, -1)
+		machine := xgo.NewVM(bytecode, globals, -1)
 		if err := machine.Run(); err != nil {
 			_, _ = fmt.Fprintln(out, err.Error())
 			continue
@@ -223,10 +222,10 @@ func RunREPL(modules *tengo.ModuleMap, in io.Reader, out io.Writer) {
 }
 
 func compileSrc(
-	modules *tengo.ModuleMap,
+	modules *xgo.ModuleMap,
 	src []byte,
 	inputFile string,
-) (*tengo.Bytecode, error) {
+) (*xgo.Bytecode, error) {
 	fileSet := parser.NewFileSet()
 	srcFile := fileSet.AddFile(filepath.Base(inputFile), -1, len(src))
 
@@ -236,7 +235,7 @@ func compileSrc(
 		return nil, err
 	}
 
-	c := tengo.NewCompiler(srcFile, nil, nil, modules, nil)
+	c := xgo.NewCompiler(srcFile, nil, nil, modules, nil)
 	c.EnableFileImport(true)
 	if resolvePath {
 		c.SetImportDir(filepath.Dir(inputFile))
@@ -254,7 +253,7 @@ func compileSrc(
 func doHelp() {
 	fmt.Println("Usage:")
 	fmt.Println()
-	fmt.Println("	tengo [flags] {input-file}")
+	fmt.Println("	xgo [flags] {input-file}")
 	fmt.Println()
 	fmt.Println("Flags:")
 	fmt.Println()
@@ -263,20 +262,20 @@ func doHelp() {
 	fmt.Println()
 	fmt.Println("Examples:")
 	fmt.Println()
-	fmt.Println("	tengo")
+	fmt.Println("	xgo")
 	fmt.Println()
 	fmt.Println("	          Start Tengo REPL")
 	fmt.Println()
-	fmt.Println("	tengo myapp.tengo")
+	fmt.Println("	xgo myapp.xgo")
 	fmt.Println()
-	fmt.Println("	          Compile and run source file (myapp.tengo)")
-	fmt.Println("	          Source file must have .tengo extension")
+	fmt.Println("	          Compile and run source file (myapp.xgo)")
+	fmt.Println("	          Source file must have .xgo extension")
 	fmt.Println()
-	fmt.Println("	tengo -o myapp myapp.tengo")
+	fmt.Println("	xgo -o myapp myapp.xgo")
 	fmt.Println()
-	fmt.Println("	          Compile source file (myapp.tengo) into bytecode file (myapp)")
+	fmt.Println("	          Compile source file (myapp.xgo) into bytecode file (myapp)")
 	fmt.Println()
-	fmt.Println("	tengo myapp")
+	fmt.Println("	xgo myapp")
 	fmt.Println()
 	fmt.Println("	          Run bytecode file (myapp)")
 	fmt.Println()

compiler.go

@@ -1,4 +1,4 @@
-package tengo
+package xgo
 
 import (
 	"errors"
@@ -10,8 +10,8 @@ import (
 	"reflect"
 	"strings"
 
-	"github.com/d5/tengo/v2/parser"
-	"github.com/d5/tengo/v2/token"
+	"surdeus.su/core/xgo/v2/parser"
+	"surdeus.su/core/xgo/v2/token"
 )
 
 // compilationScope represents a compiled instructions and the last two
@@ -631,8 +631,8 @@ func (c *Compiler) SetImportDir(dir string) {
 //
 // Use this method if you want other source file extension than ".tengo".
 //
-//     // this will search for *.tengo, *.foo, *.bar
-//     err := c.SetImportFileExt(".tengo", ".foo", ".bar")
+//	// this will search for *.tengo, *.foo, *.bar
+//	err := c.SetImportFileExt(".tengo", ".foo", ".bar")
 //
 // This function requires at least one argument, since it will replace the
 // current list of extension name.

compiler_test.go

@@ -1,4 +1,4 @@
-package tengo_test
+package xgo_test
 
 import (
 	"fmt"
@@ -7,10 +7,10 @@ import (
 	"strings"
 	"testing"
 
-	"github.com/d5/tengo/v2"
-	"github.com/d5/tengo/v2/parser"
-	"github.com/d5/tengo/v2/require"
-	"github.com/d5/tengo/v2/stdlib"
+	"surdeus.su/core/xgo/v2"
+	"surdeus.su/core/xgo/v2/parser"
+	"surdeus.su/core/xgo/v2/require"
+	"surdeus.su/core/xgo/v2/stdlib"
 )
 
 func TestCompiler_Compile(t *testing.T) {

doc.go

@@ -1,3 +1,3 @@
 // tengo is a small, dynamic, fast, secure script language for Go.
 
-package tengo
+package xgo

errors.go

@@ -1,4 +1,4 @@
-package tengo
+package xgo
 
 import (
 	"errors"

eval.go

@@ -1,4 +1,4 @@
-package tengo
+package xgo
 
 import (
 	"context"

eval_test.go

@@ -1,11 +1,11 @@
-package tengo_test
+package xgo_test
 
 import (
 	"context"
 	"testing"
 
-	"github.com/d5/tengo/v2"
-	"github.com/d5/tengo/v2/require"
+	"surdeus.su/core/xgo/v2"
+	"surdeus.su/core/xgo/v2/require"
 )
 
 func TestEval(t *testing.T) {

example_test.go

@@ -1,10 +1,10 @@
-package tengo_test
+package xgo_test
 
 import (
 	"context"
 	"fmt"
 
-	"github.com/d5/tengo/v2"
+	"surdeus.su/core/xgo/v2"
 )
 
 func Example() {

examples/interoperability/main.go

@@ -11,7 +11,7 @@ import (
 	"sync"
 	"time"
 
-	"github.com/d5/tengo/v2"
+	"surdeus.su/core/xgo/v2"
 )
 
 // CallArgs holds function name to be executed and its required parameters with

formatter.go

@@ -1,4 +1,4 @@
-package tengo
+package xgo
 
 import (
 	"strconv"

go.mod

@@ -1,3 +1,3 @@
-module github.com/d5/tengo/v2
+module surdeus.su/core/xgo/v2
 
-go 1.13
+go 1.18

instructions.go

@@ -1,9 +1,9 @@
-package tengo
+package xgo
 
 import (
 	"fmt"
 
-	"github.com/d5/tengo/v2/parser"
+	"surdeus.su/core/xgo/v2/parser"
 )
 
 // MakeInstruction returns a bytecode for an opcode and the operands.

iterator.go

@@ -1,4 +1,4 @@
-package tengo
+package xgo
 
 // Iterator represents an iterator for underlying data type.
 type Iterator interface {

modules.go

@@ -1,4 +1,4 @@
-package tengo
+package xgo
 
 // Importable interface represents importable module instance.
 type Importable interface {

objects.go

@@ -1,4 +1,4 @@
-package tengo
+package xgo
 
 import (
 	"bytes"
@@ -8,8 +8,8 @@ import (
 	"strings"
 	"time"
 
-	"github.com/d5/tengo/v2/parser"
-	"github.com/d5/tengo/v2/token"
+	"surdeus.su/core/xgo/v2/parser"
+	"surdeus.su/core/xgo/v2/token"
 )
 
 var (

objects_test.go

@@ -1,11 +1,11 @@
-package tengo_test
+package xgo_test
 
 import (
 	"testing"
 
-	"github.com/d5/tengo/v2"
-	"github.com/d5/tengo/v2/require"
-	"github.com/d5/tengo/v2/token"
+	"surdeus.su/core/xgo/v2"
+	"surdeus.su/core/xgo/v2/require"
+	"surdeus.su/core/xgo/v2/token"
 )
 
 func TestObject_TypeName(t *testing.T) {

parser/ast_test.go

@@ -3,7 +3,7 @@ package parser_test
 import (
 	"testing"
 
-	"github.com/d5/tengo/v2/parser"
+	"surdeus.su/core/xgo/v2/parser"
 )
 
 func TestIdentListString(t *testing.T) {

parser/expr.go

@@ -3,7 +3,7 @@ package parser
 import (
 	"strings"
 
-	"github.com/d5/tengo/v2/token"
+	"surdeus.su/core/xgo/v2/token"
 )
 
 // Expr represents an expression node in the AST.

parser/parser.go

@@ -6,7 +6,7 @@ import (
 	"sort"
 	"strconv"
 
-	"github.com/d5/tengo/v2/token"
+	"surdeus.su/core/xgo/v2/token"
 )
 
 type bailout struct{}

parser/parser_test.go

@@ -8,9 +8,9 @@ import (
 	"strings"
 	"testing"
 
-	. "github.com/d5/tengo/v2/parser"
-	"github.com/d5/tengo/v2/require"
-	"github.com/d5/tengo/v2/token"
+	. "surdeus.su/core/xgo/v2/parser"
+	"surdeus.su/core/xgo/v2/require"
+	"surdeus.su/core/xgo/v2/token"
 )
 
 func TestParserError(t *testing.T) {

parser/scanner.go

@@ -5,7 +5,7 @@ import (
 	"unicode"
 	"unicode/utf8"
 
-	"github.com/d5/tengo/v2/token"
+	"surdeus.su/core/xgo/v2/token"
 )
 
 // byte order mark

parser/scanner_test.go

@@ -7,9 +7,9 @@ import (
 	"testing"
 	"time"
 
-	"github.com/d5/tengo/v2/parser"
-	"github.com/d5/tengo/v2/require"
-	"github.com/d5/tengo/v2/token"
+	"surdeus.su/core/xgo/v2/parser"
+	"surdeus.su/core/xgo/v2/require"
+	"surdeus.su/core/xgo/v2/token"
 )
 
 var testFileSet = parser.NewFileSet()

parser/stmt.go

@@ -3,7 +3,7 @@ package parser
 import (
 	"strings"
 
-	"github.com/d5/tengo/v2/token"
+	"surdeus.su/core/xgo/v2/token"
 )
 
 // Stmt represents a statement in the AST.

require/require.go

@@ -10,9 +10,9 @@ import (
 	"unicode"
 	"unicode/utf8"
 
-	"github.com/d5/tengo/v2"
-	"github.com/d5/tengo/v2/parser"
-	"github.com/d5/tengo/v2/token"
+	"surdeus.su/core/xgo/v2"
+	"surdeus.su/core/xgo/v2/parser"
+	"surdeus.su/core/xgo/v2/token"
 )
 
 // NoError asserts err is not an error.

script.go

@@ -1,4 +1,4 @@
-package tengo
+package xgo
 
 import (
 	"context"
@@ -6,7 +6,7 @@ import (
 	"path/filepath"
 	"sync"
 
-	"github.com/d5/tengo/v2/parser"
+	"surdeus.su/core/xgo/v2/parser"
 )
 
 // Script can simplify compilation and execution of embedded scripts.

script_test.go

@@ -1,4 +1,4 @@
-package tengo_test
+package xgo_test
 
 import (
 	"context"
@@ -11,10 +11,10 @@ import (
 	"testing"
 	"time"
 
-	"github.com/d5/tengo/v2"
-	"github.com/d5/tengo/v2/require"
-	"github.com/d5/tengo/v2/stdlib"
-	"github.com/d5/tengo/v2/token"
+	"surdeus.su/core/xgo/v2"
+	"surdeus.su/core/xgo/v2/require"
+	"surdeus.su/core/xgo/v2/stdlib"
+	"surdeus.su/core/xgo/v2/token"
 )
 
 func TestScript_Add(t *testing.T) {

stdlib/base64.go

@@ -3,32 +3,32 @@ package stdlib
 import (
 	"encoding/base64"
 
-	"github.com/d5/tengo/v2"
+	"surdeus.su/core/xgo/v2"
 )
 
-var base64Module = map[string]tengo.Object{
-	"encode": &tengo.UserFunction{
+var base64Module = map[string]xgo.Object{
+	"encode": &xgo.UserFunction{
 		Value: FuncAYRS(base64.StdEncoding.EncodeToString),
 	},
-	"decode": &tengo.UserFunction{
+	"decode": &xgo.UserFunction{
 		Value: FuncASRYE(base64.StdEncoding.DecodeString),
 	},
-	"raw_encode": &tengo.UserFunction{
+	"raw_encode": &xgo.UserFunction{
 		Value: FuncAYRS(base64.RawStdEncoding.EncodeToString),
 	},
-	"raw_decode": &tengo.UserFunction{
+	"raw_decode": &xgo.UserFunction{
 		Value: FuncASRYE(base64.RawStdEncoding.DecodeString),
 	},
-	"url_encode": &tengo.UserFunction{
+	"url_encode": &xgo.UserFunction{
 		Value: FuncAYRS(base64.URLEncoding.EncodeToString),
 	},
-	"url_decode": &tengo.UserFunction{
+	"url_decode": &xgo.UserFunction{
 		Value: FuncASRYE(base64.URLEncoding.DecodeString),
 	},
-	"raw_url_encode": &tengo.UserFunction{
+	"raw_url_encode": &xgo.UserFunction{
 		Value: FuncAYRS(base64.RawURLEncoding.EncodeToString),
 	},
-	"raw_url_decode": &tengo.UserFunction{
+	"raw_url_decode": &xgo.UserFunction{
 		Value: FuncASRYE(base64.RawURLEncoding.DecodeString),
 	},
 }

stdlib/builtin_modules.go

@@ -1,11 +1,16 @@
 package stdlib
 
 import (
-	"github.com/d5/tengo/v2"
+	"surdeus.su/core/xgo/v2"
+	"surdeus.su/core/xgo/v2/stdlib/http"
+	"surdeus.su/core/xgo/v2/stdlib/paths"
+	"surdeus.su/core/xgo/v2/stdlib/html"
+	"surdeus.su/core/xgo/v2/stdlib/log"
+	"surdeus.su/core/xgo/v2/stdlib/cjson"
 )
 
 // BuiltinModules are builtin type standard library modules.
-var BuiltinModules = map[string]map[string]tengo.Object{
+var BuiltinModules = map[string]map[string]xgo.Object{
 	"math":   mathModule,
 	"os":     osModule,
 	"text":   textModule,
@@ -15,4 +20,11 @@ var BuiltinModules = map[string]map[string]tengo.Object{
 	"json":   jsonModule,
 	"base64": base64Module,
 	"hex":    hexModule,
+	// Implement later.
+	"url":   nil,
+	"http":  http.Module,
+	"paths": paths.Module,
+	"html":  html.Module,
+	"log":   log.Module,
+	"cjson": cjson.Module,
 }

stdlib/cjson/dec.go

@@ -0,0 +1,108 @@
+package cjson
+
+import "surdeus.su/core/xgo/v2"
+import tjson "surdeus.su/core/xgo/v2/stdlib/json"
+
+import "encoding/json"
+import "io"
+import "errors"
+import "os"
+
+type Decoder struct {
+	xgo.ObjectImpl
+	dec       *json.Decoder
+	end       bool
+	inputName string
+}
+
+func (d *Decoder) TypeName() string {
+	return "cjson.Decoder"
+}
+
+func (d *Decoder) String() string {
+	return "cjson.Decoder{...}"
+}
+
+func NewDecoder(args ...xgo.Object) (xgo.Object, error) {
+	var inputName string
+	if len(args) == 0 {
+		inputName = StrStdin
+	} else if len(args) > 1 {
+		return nil, xgo.ErrWrongNumArguments
+	} else {
+		var ok bool
+		inputObject := args[0]
+		inputName, ok = xgo.ToString(inputObject)
+		if !ok {
+			return nil, xgo.ErrInvalidArgumentType{
+				Name:     "first",
+				Expected: "stringer",
+				Found:    inputObject.TypeName(),
+			}
+		}
+	}
+
+	var reader io.Reader
+	var err error
+	switch {
+	case inputName == StrStdin:
+		reader = os.Stdin
+	default:
+		reader, err = os.Open(inputName)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	ret := &Decoder{}
+	ret.dec = json.NewDecoder(reader)
+
+	return ret, nil
+}
+
+func (d *Decoder) IndexGet(
+	index xgo.Object,
+) (xgo.Object, error) {
+	key, ok := xgo.ToString(index)
+	if !ok {
+		return nil, xgo.ErrInvalidIndexValueType
+	}
+
+	switch key {
+	case "decode":
+		return &xgo.UserFunction{
+			Name:  "decode",
+			Value: d.Decode,
+		}, nil
+	}
+
+	// Nothing found.
+	return nil, nil
+}
+
+func (d *Decoder) Decode(
+	args ...xgo.Object,
+) (xgo.Object, error) {
+	if len(args) > 0 {
+		return nil, xgo.ErrWrongNumArguments
+	}
+	if d.end {
+		return nil, nil
+	}
+
+	var v any
+	err := d.dec.Decode(&v)
+	if err != nil {
+		if errors.Is(err, io.EOF) {
+			d.end = true
+		} else {
+			return nil, err
+		}
+	}
+
+	bts, err := json.Marshal(v)
+	if err != nil {
+		return nil, err
+	}
+	return tjson.Decode(bts)
+}

stdlib/cjson/main.go

@@ -0,0 +1,23 @@
+package cjson
+
+import "surdeus.su/core/xgo/v2"
+import "io"
+import "encoding/json"
+
+//import "github.com/d5/xgo/v2/stdlib"
+
+const (
+	StrStdin = "<stdin>"
+)
+
+var Module = map[string]xgo.Object{
+	"Decoder": &xgo.BuiltinFunction{
+		Name:  "Decoder",
+		Value: NewDecoder,
+	},
+}
+
+type Encoder struct {
+	enc    *json.Encoder
+	output io.Writer
+}

stdlib/errors.go

@@ -1,12 +1,12 @@
 package stdlib
 
 import (
-	"github.com/d5/tengo/v2"
+	"surdeus.su/core/xgo/v2"
 )
 
-func wrapError(err error) tengo.Object {
+func wrapError(err error) xgo.Object {
 	if err == nil {
-		return tengo.TrueValue
+		return xgo.TrueValue
 	}
-	return &tengo.Error{Value: &tengo.String{Value: err.Error()}}
+	return &xgo.Error{Value: &xgo.String{Value: err.Error()}}
 }

stdlib/fmt.go

@@ -3,17 +3,17 @@ package stdlib
 import (
 	"fmt"
 
-	"github.com/d5/tengo/v2"
+	"surdeus.su/core/xgo/v2"
 )
 
-var fmtModule = map[string]tengo.Object{
-	"print":   &tengo.UserFunction{Name: "print", Value: fmtPrint},
-	"printf":  &tengo.UserFunction{Name: "printf", Value: fmtPrintf},
-	"println": &tengo.UserFunction{Name: "println", Value: fmtPrintln},
-	"sprintf": &tengo.UserFunction{Name: "sprintf", Value: fmtSprintf},
+var fmtModule = map[string]xgo.Object{
+	"print":   &xgo.UserFunction{Name: "print", Value: fmtPrint},
+	"printf":  &xgo.UserFunction{Name: "printf", Value: fmtPrintf},
+	"println": &xgo.UserFunction{Name: "println", Value: fmtPrintln},
+	"sprintf": &xgo.UserFunction{Name: "sprintf", Value: fmtSprintf},
 }
 
-func fmtPrint(args ...tengo.Object) (ret tengo.Object, err error) {
+func fmtPrint(args ...xgo.Object) (ret xgo.Object, err error) {
 	printArgs, err := getPrintArgs(args...)
 	if err != nil {
 		return nil, err
@@ -22,15 +22,15 @@ func fmtPrint(args ...tengo.Object) (ret tengo.Object, err error) {
 	return nil, nil
 }
 
-func fmtPrintf(args ...tengo.Object) (ret tengo.Object, err error) {
+func fmtPrintf(args ...xgo.Object) (ret xgo.Object, err error) {
 	numArgs := len(args)
 	if numArgs == 0 {
-		return nil, tengo.ErrWrongNumArguments
+		return nil, xgo.ErrWrongNumArguments
 	}
 
-	format, ok := args[0].(*tengo.String)
+	format, ok := args[0].(*xgo.String)
 	if !ok {
-		return nil, tengo.ErrInvalidArgumentType{
+		return nil, xgo.ErrInvalidArgumentType{
 			Name:     "format",
 			Expected: "string",
 			Found:    args[0].TypeName(),
@@ -41,7 +41,7 @@ func fmtPrintf(args ...tengo.Object) (ret tengo.Object, err error) {
 		return nil, nil
 	}
 
-	s, err := tengo.Format(format.Value, args[1:]...)
+	s, err := xgo.Format(format.Value, args[1:]...)
 	if err != nil {
 		return nil, err
 	}
@@ -49,7 +49,7 @@ func fmtPrintf(args ...tengo.Object) (ret tengo.Object, err error) {
 	return nil, nil
 }
 
-func fmtPrintln(args ...tengo.Object) (ret tengo.Object, err error) {
+func fmtPrintln(args ...xgo.Object) (ret xgo.Object, err error) {
 	printArgs, err := getPrintArgs(args...)
 	if err != nil {
 		return nil, err
@@ -59,15 +59,15 @@ func fmtPrintln(args ...tengo.Object) (ret tengo.Object, err error) {
 	return nil, nil
 }
 
-func fmtSprintf(args ...tengo.Object) (ret tengo.Object, err error) {
+func fmtSprintf(args ...xgo.Object) (ret xgo.Object, err error) {
 	numArgs := len(args)
 	if numArgs == 0 {
-		return nil, tengo.ErrWrongNumArguments
+		return nil, xgo.ErrWrongNumArguments
 	}
 
-	format, ok := args[0].(*tengo.String)
+	format, ok := args[0].(*xgo.String)
 	if !ok {
-		return nil, tengo.ErrInvalidArgumentType{
+		return nil, xgo.ErrInvalidArgumentType{
 			Name:     "format",
 			Expected: "string",
 			Found:    args[0].TypeName(),
@@ -77,22 +77,22 @@ func fmtSprintf(args ...tengo.Object) (ret tengo.Object, err error) {
 		// okay to return 'format' directly as String is immutable
 		return format, nil
 	}
-	s, err := tengo.Format(format.Value, args[1:]...)
+	s, err := xgo.Format(format.Value, args[1:]...)
 	if err != nil {
 		return nil, err
 	}
-	return &tengo.String{Value: s}, nil
+	return &xgo.String{Value: s}, nil
 }
 
-func getPrintArgs(args ...tengo.Object) ([]interface{}, error) {
+func getPrintArgs(args ...xgo.Object) ([]interface{}, error) {
 	var printArgs []interface{}
 	l := 0
 	for _, arg := range args {
-		s, _ := tengo.ToString(arg)
+		s, _ := xgo.ToString(arg)
 		slen := len(s)
 		// make sure length does not exceed the limit
-		if l+slen > tengo.MaxStringLen {
-			return nil, tengo.ErrStringLimit
+		if l+slen > xgo.MaxStringLen {
+			return nil, xgo.ErrStringLimit
 		}
 		l += slen
 		printArgs = append(printArgs, s)

stdlib/func_typedefs_test.go

@@ -6,51 +6,51 @@ import (
 	"strings"
 	"testing"
 
-	"github.com/d5/tengo/v2"
-	"github.com/d5/tengo/v2/require"
-	"github.com/d5/tengo/v2/stdlib"
+	"surdeus.su/core/xgo/v2"
+	"surdeus.su/core/xgo/v2/require"
+	"surdeus.su/core/xgo/v2/stdlib"
 )
 
 func TestFuncAIR(t *testing.T) {
 	uf := stdlib.FuncAIR(func(int) {})
-	ret, err := funcCall(uf, &tengo.Int{Value: 10})
+	ret, err := funcCall(uf, &xgo.Int{Value: 10})
 	require.NoError(t, err)
-	require.Equal(t, tengo.UndefinedValue, ret)
+	require.Equal(t, xgo.UndefinedValue, ret)
 	_, err = funcCall(uf)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncAR(t *testing.T) {
 	uf := stdlib.FuncAR(func() {})
 	ret, err := funcCall(uf)
 	require.NoError(t, err)
-	require.Equal(t, tengo.UndefinedValue, ret)
-	_, err = funcCall(uf, tengo.TrueValue)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	require.Equal(t, xgo.UndefinedValue, ret)
+	_, err = funcCall(uf, xgo.TrueValue)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncARI(t *testing.T) {
 	uf := stdlib.FuncARI(func() int { return 10 })
 	ret, err := funcCall(uf)
 	require.NoError(t, err)
-	require.Equal(t, &tengo.Int{Value: 10}, ret)
-	_, err = funcCall(uf, tengo.TrueValue)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	require.Equal(t, &xgo.Int{Value: 10}, ret)
+	_, err = funcCall(uf, xgo.TrueValue)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncARE(t *testing.T) {
 	uf := stdlib.FuncARE(func() error { return nil })
 	ret, err := funcCall(uf)
 	require.NoError(t, err)
-	require.Equal(t, tengo.TrueValue, ret)
+	require.Equal(t, xgo.TrueValue, ret)
 	uf = stdlib.FuncARE(func() error { return errors.New("some error") })
 	ret, err = funcCall(uf)
 	require.NoError(t, err)
-	require.Equal(t, &tengo.Error{
-		Value: &tengo.String{Value: "some error"},
+	require.Equal(t, &xgo.Error{
+		Value: &xgo.String{Value: "some error"},
 	}, ret)
-	_, err = funcCall(uf, tengo.TrueValue)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	_, err = funcCall(uf, xgo.TrueValue)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncARIsE(t *testing.T) {
@@ -59,364 +59,364 @@ func TestFuncARIsE(t *testing.T) {
 	})
 	ret, err := funcCall(uf)
 	require.NoError(t, err)
-	require.Equal(t, array(&tengo.Int{Value: 1},
-		&tengo.Int{Value: 2}, &tengo.Int{Value: 3}), ret)
+	require.Equal(t, array(&xgo.Int{Value: 1},
+		&xgo.Int{Value: 2}, &xgo.Int{Value: 3}), ret)
 	uf = stdlib.FuncARIsE(func() ([]int, error) {
 		return nil, errors.New("some error")
 	})
 	ret, err = funcCall(uf)
 	require.NoError(t, err)
-	require.Equal(t, &tengo.Error{
-		Value: &tengo.String{Value: "some error"},
+	require.Equal(t, &xgo.Error{
+		Value: &xgo.String{Value: "some error"},
 	}, ret)
-	_, err = funcCall(uf, tengo.TrueValue)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	_, err = funcCall(uf, xgo.TrueValue)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncARS(t *testing.T) {
 	uf := stdlib.FuncARS(func() string { return "foo" })
 	ret, err := funcCall(uf)
 	require.NoError(t, err)
-	require.Equal(t, &tengo.String{Value: "foo"}, ret)
-	_, err = funcCall(uf, tengo.TrueValue)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	require.Equal(t, &xgo.String{Value: "foo"}, ret)
+	_, err = funcCall(uf, xgo.TrueValue)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncARSE(t *testing.T) {
 	uf := stdlib.FuncARSE(func() (string, error) { return "foo", nil })
 	ret, err := funcCall(uf)
 	require.NoError(t, err)
-	require.Equal(t, &tengo.String{Value: "foo"}, ret)
+	require.Equal(t, &xgo.String{Value: "foo"}, ret)
 	uf = stdlib.FuncARSE(func() (string, error) {
 		return "", errors.New("some error")
 	})
 	ret, err = funcCall(uf)
 	require.NoError(t, err)
-	require.Equal(t, &tengo.Error{
-		Value: &tengo.String{Value: "some error"},
+	require.Equal(t, &xgo.Error{
+		Value: &xgo.String{Value: "some error"},
 	}, ret)
-	_, err = funcCall(uf, tengo.TrueValue)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	_, err = funcCall(uf, xgo.TrueValue)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncARSs(t *testing.T) {
 	uf := stdlib.FuncARSs(func() []string { return []string{"foo", "bar"} })
 	ret, err := funcCall(uf)
 	require.NoError(t, err)
-	require.Equal(t, array(&tengo.String{Value: "foo"},
-		&tengo.String{Value: "bar"}), ret)
-	_, err = funcCall(uf, tengo.TrueValue)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	require.Equal(t, array(&xgo.String{Value: "foo"},
+		&xgo.String{Value: "bar"}), ret)
+	_, err = funcCall(uf, xgo.TrueValue)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncASRE(t *testing.T) {
 	uf := stdlib.FuncASRE(func(a string) error { return nil })
-	ret, err := funcCall(uf, &tengo.String{Value: "foo"})
+	ret, err := funcCall(uf, &xgo.String{Value: "foo"})
 	require.NoError(t, err)
-	require.Equal(t, tengo.TrueValue, ret)
+	require.Equal(t, xgo.TrueValue, ret)
 	uf = stdlib.FuncASRE(func(a string) error {
 		return errors.New("some error")
 	})
-	ret, err = funcCall(uf, &tengo.String{Value: "foo"})
+	ret, err = funcCall(uf, &xgo.String{Value: "foo"})
 	require.NoError(t, err)
-	require.Equal(t, &tengo.Error{
-		Value: &tengo.String{Value: "some error"},
+	require.Equal(t, &xgo.Error{
+		Value: &xgo.String{Value: "some error"},
 	}, ret)
 	_, err = funcCall(uf)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncASRS(t *testing.T) {
 	uf := stdlib.FuncASRS(func(a string) string { return a })
-	ret, err := funcCall(uf, &tengo.String{Value: "foo"})
+	ret, err := funcCall(uf, &xgo.String{Value: "foo"})
 	require.NoError(t, err)
-	require.Equal(t, &tengo.String{Value: "foo"}, ret)
+	require.Equal(t, &xgo.String{Value: "foo"}, ret)
 	_, err = funcCall(uf)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncASRSs(t *testing.T) {
 	uf := stdlib.FuncASRSs(func(a string) []string { return []string{a} })
-	ret, err := funcCall(uf, &tengo.String{Value: "foo"})
+	ret, err := funcCall(uf, &xgo.String{Value: "foo"})
 	require.NoError(t, err)
-	require.Equal(t, array(&tengo.String{Value: "foo"}), ret)
+	require.Equal(t, array(&xgo.String{Value: "foo"}), ret)
 	_, err = funcCall(uf)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncASI64RE(t *testing.T) {
 	uf := stdlib.FuncASI64RE(func(a string, b int64) error { return nil })
-	ret, err := funcCall(uf, &tengo.String{Value: "foo"}, &tengo.Int{Value: 5})
+	ret, err := funcCall(uf, &xgo.String{Value: "foo"}, &xgo.Int{Value: 5})
 	require.NoError(t, err)
-	require.Equal(t, tengo.TrueValue, ret)
+	require.Equal(t, xgo.TrueValue, ret)
 	uf = stdlib.FuncASI64RE(func(a string, b int64) error {
 		return errors.New("some error")
 	})
-	ret, err = funcCall(uf, &tengo.String{Value: "foo"}, &tengo.Int{Value: 5})
+	ret, err = funcCall(uf, &xgo.String{Value: "foo"}, &xgo.Int{Value: 5})
 	require.NoError(t, err)
 	require.Equal(t,
-		&tengo.Error{Value: &tengo.String{Value: "some error"}}, ret)
+		&xgo.Error{Value: &xgo.String{Value: "some error"}}, ret)
 	_, err = funcCall(uf)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncAIIRE(t *testing.T) {
 	uf := stdlib.FuncAIIRE(func(a, b int) error { return nil })
-	ret, err := funcCall(uf, &tengo.Int{Value: 5}, &tengo.Int{Value: 7})
+	ret, err := funcCall(uf, &xgo.Int{Value: 5}, &xgo.Int{Value: 7})
 	require.NoError(t, err)
-	require.Equal(t, tengo.TrueValue, ret)
+	require.Equal(t, xgo.TrueValue, ret)
 	uf = stdlib.FuncAIIRE(func(a, b int) error {
 		return errors.New("some error")
 	})
-	ret, err = funcCall(uf, &tengo.Int{Value: 5}, &tengo.Int{Value: 7})
+	ret, err = funcCall(uf, &xgo.Int{Value: 5}, &xgo.Int{Value: 7})
 	require.NoError(t, err)
 	require.Equal(t,
-		&tengo.Error{Value: &tengo.String{Value: "some error"}}, ret)
+		&xgo.Error{Value: &xgo.String{Value: "some error"}}, ret)
 	_, err = funcCall(uf)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncASIIRE(t *testing.T) {
 	uf := stdlib.FuncASIIRE(func(a string, b, c int) error { return nil })
-	ret, err := funcCall(uf, &tengo.String{Value: "foo"}, &tengo.Int{Value: 5},
-		&tengo.Int{Value: 7})
+	ret, err := funcCall(uf, &xgo.String{Value: "foo"}, &xgo.Int{Value: 5},
+		&xgo.Int{Value: 7})
 	require.NoError(t, err)
-	require.Equal(t, tengo.TrueValue, ret)
+	require.Equal(t, xgo.TrueValue, ret)
 	uf = stdlib.FuncASIIRE(func(a string, b, c int) error {
 		return errors.New("some error")
 	})
-	ret, err = funcCall(uf, &tengo.String{Value: "foo"}, &tengo.Int{Value: 5},
-		&tengo.Int{Value: 7})
+	ret, err = funcCall(uf, &xgo.String{Value: "foo"}, &xgo.Int{Value: 5},
+		&xgo.Int{Value: 7})
 	require.NoError(t, err)
 	require.Equal(t,
-		&tengo.Error{Value: &tengo.String{Value: "some error"}}, ret)
+		&xgo.Error{Value: &xgo.String{Value: "some error"}}, ret)
 	_, err = funcCall(uf)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncASRSE(t *testing.T) {
 	uf := stdlib.FuncASRSE(func(a string) (string, error) { return a, nil })
-	ret, err := funcCall(uf, &tengo.String{Value: "foo"})
+	ret, err := funcCall(uf, &xgo.String{Value: "foo"})
 	require.NoError(t, err)
-	require.Equal(t, &tengo.String{Value: "foo"}, ret)
+	require.Equal(t, &xgo.String{Value: "foo"}, ret)
 	uf = stdlib.FuncASRSE(func(a string) (string, error) {
 		return a, errors.New("some error")
 	})
-	ret, err = funcCall(uf, &tengo.String{Value: "foo"})
+	ret, err = funcCall(uf, &xgo.String{Value: "foo"})
 	require.NoError(t, err)
 	require.Equal(t,
-		&tengo.Error{Value: &tengo.String{Value: "some error"}}, ret)
+		&xgo.Error{Value: &xgo.String{Value: "some error"}}, ret)
 	_, err = funcCall(uf)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncASSRE(t *testing.T) {
 	uf := stdlib.FuncASSRE(func(a, b string) error { return nil })
-	ret, err := funcCall(uf, &tengo.String{Value: "foo"},
-		&tengo.String{Value: "bar"})
+	ret, err := funcCall(uf, &xgo.String{Value: "foo"},
+		&xgo.String{Value: "bar"})
 	require.NoError(t, err)
-	require.Equal(t, tengo.TrueValue, ret)
+	require.Equal(t, xgo.TrueValue, ret)
 	uf = stdlib.FuncASSRE(func(a, b string) error {
 		return errors.New("some error")
 	})
-	ret, err = funcCall(uf, &tengo.String{Value: "foo"},
-		&tengo.String{Value: "bar"})
+	ret, err = funcCall(uf, &xgo.String{Value: "foo"},
+		&xgo.String{Value: "bar"})
 	require.NoError(t, err)
 	require.Equal(t,
-		&tengo.Error{Value: &tengo.String{Value: "some error"}}, ret)
-	_, err = funcCall(uf, &tengo.String{Value: "foo"})
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+		&xgo.Error{Value: &xgo.String{Value: "some error"}}, ret)
+	_, err = funcCall(uf, &xgo.String{Value: "foo"})
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncASsRS(t *testing.T) {
 	uf := stdlib.FuncASsSRS(func(a []string, b string) string {
 		return strings.Join(a, b)
 	})
-	ret, err := funcCall(uf, array(&tengo.String{Value: "foo"},
-		&tengo.String{Value: "bar"}), &tengo.String{Value: " "})
+	ret, err := funcCall(uf, array(&xgo.String{Value: "foo"},
+		&xgo.String{Value: "bar"}), &xgo.String{Value: " "})
 	require.NoError(t, err)
-	require.Equal(t, &tengo.String{Value: "foo bar"}, ret)
-	_, err = funcCall(uf, &tengo.String{Value: "foo"})
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	require.Equal(t, &xgo.String{Value: "foo bar"}, ret)
+	_, err = funcCall(uf, &xgo.String{Value: "foo"})
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncARF(t *testing.T) {
 	uf := stdlib.FuncARF(func() float64 { return 10.0 })
 	ret, err := funcCall(uf)
 	require.NoError(t, err)
-	require.Equal(t, &tengo.Float{Value: 10.0}, ret)
-	_, err = funcCall(uf, tengo.TrueValue)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	require.Equal(t, &xgo.Float{Value: 10.0}, ret)
+	_, err = funcCall(uf, xgo.TrueValue)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncAFRF(t *testing.T) {
 	uf := stdlib.FuncAFRF(func(a float64) float64 { return a })
-	ret, err := funcCall(uf, &tengo.Float{Value: 10.0})
+	ret, err := funcCall(uf, &xgo.Float{Value: 10.0})
 	require.NoError(t, err)
-	require.Equal(t, &tengo.Float{Value: 10.0}, ret)
+	require.Equal(t, &xgo.Float{Value: 10.0}, ret)
 	_, err = funcCall(uf)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
-	_, err = funcCall(uf, tengo.TrueValue, tengo.TrueValue)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
+	_, err = funcCall(uf, xgo.TrueValue, xgo.TrueValue)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncAIRF(t *testing.T) {
 	uf := stdlib.FuncAIRF(func(a int) float64 {
 		return float64(a)
 	})
-	ret, err := funcCall(uf, &tengo.Int{Value: 10.0})
+	ret, err := funcCall(uf, &xgo.Int{Value: 10.0})
 	require.NoError(t, err)
-	require.Equal(t, &tengo.Float{Value: 10.0}, ret)
+	require.Equal(t, &xgo.Float{Value: 10.0}, ret)
 	_, err = funcCall(uf)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
-	_, err = funcCall(uf, tengo.TrueValue, tengo.TrueValue)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
+	_, err = funcCall(uf, xgo.TrueValue, xgo.TrueValue)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncAFRI(t *testing.T) {
 	uf := stdlib.FuncAFRI(func(a float64) int {
 		return int(a)
 	})
-	ret, err := funcCall(uf, &tengo.Float{Value: 10.5})
+	ret, err := funcCall(uf, &xgo.Float{Value: 10.5})
 	require.NoError(t, err)
-	require.Equal(t, &tengo.Int{Value: 10}, ret)
+	require.Equal(t, &xgo.Int{Value: 10}, ret)
 	_, err = funcCall(uf)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
-	_, err = funcCall(uf, tengo.TrueValue, tengo.TrueValue)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
+	_, err = funcCall(uf, xgo.TrueValue, xgo.TrueValue)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncAFRB(t *testing.T) {
 	uf := stdlib.FuncAFRB(func(a float64) bool {
 		return a > 0.0
 	})
-	ret, err := funcCall(uf, &tengo.Float{Value: 0.1})
+	ret, err := funcCall(uf, &xgo.Float{Value: 0.1})
 	require.NoError(t, err)
-	require.Equal(t, tengo.TrueValue, ret)
+	require.Equal(t, xgo.TrueValue, ret)
 	_, err = funcCall(uf)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
-	_, err = funcCall(uf, tengo.TrueValue, tengo.TrueValue)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
+	_, err = funcCall(uf, xgo.TrueValue, xgo.TrueValue)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncAFFRF(t *testing.T) {
 	uf := stdlib.FuncAFFRF(func(a, b float64) float64 {
 		return a + b
 	})
-	ret, err := funcCall(uf, &tengo.Float{Value: 10.0},
-		&tengo.Float{Value: 20.0})
+	ret, err := funcCall(uf, &xgo.Float{Value: 10.0},
+		&xgo.Float{Value: 20.0})
 	require.NoError(t, err)
-	require.Equal(t, &tengo.Float{Value: 30.0}, ret)
+	require.Equal(t, &xgo.Float{Value: 30.0}, ret)
 	_, err = funcCall(uf)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
-	_, err = funcCall(uf, tengo.TrueValue)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
+	_, err = funcCall(uf, xgo.TrueValue)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncASIRS(t *testing.T) {
 	uf := stdlib.FuncASIRS(func(a string, b int) string {
 		return strings.Repeat(a, b)
 	})
-	ret, err := funcCall(uf, &tengo.String{Value: "ab"}, &tengo.Int{Value: 2})
+	ret, err := funcCall(uf, &xgo.String{Value: "ab"}, &xgo.Int{Value: 2})
 	require.NoError(t, err)
-	require.Equal(t, &tengo.String{Value: "abab"}, ret)
+	require.Equal(t, &xgo.String{Value: "abab"}, ret)
 	_, err = funcCall(uf)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
-	_, err = funcCall(uf, tengo.TrueValue)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
+	_, err = funcCall(uf, xgo.TrueValue)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncAIFRF(t *testing.T) {
 	uf := stdlib.FuncAIFRF(func(a int, b float64) float64 {
 		return float64(a) + b
 	})
-	ret, err := funcCall(uf, &tengo.Int{Value: 10}, &tengo.Float{Value: 20.0})
+	ret, err := funcCall(uf, &xgo.Int{Value: 10}, &xgo.Float{Value: 20.0})
 	require.NoError(t, err)
-	require.Equal(t, &tengo.Float{Value: 30.0}, ret)
+	require.Equal(t, &xgo.Float{Value: 30.0}, ret)
 	_, err = funcCall(uf)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
-	_, err = funcCall(uf, tengo.TrueValue)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
+	_, err = funcCall(uf, xgo.TrueValue)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncAFIRF(t *testing.T) {
 	uf := stdlib.FuncAFIRF(func(a float64, b int) float64 {
 		return a + float64(b)
 	})
-	ret, err := funcCall(uf, &tengo.Float{Value: 10.0}, &tengo.Int{Value: 20})
+	ret, err := funcCall(uf, &xgo.Float{Value: 10.0}, &xgo.Int{Value: 20})
 	require.NoError(t, err)
-	require.Equal(t, &tengo.Float{Value: 30.0}, ret)
+	require.Equal(t, &xgo.Float{Value: 30.0}, ret)
 	_, err = funcCall(uf)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
-	_, err = funcCall(uf, tengo.TrueValue)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
+	_, err = funcCall(uf, xgo.TrueValue)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncAFIRB(t *testing.T) {
 	uf := stdlib.FuncAFIRB(func(a float64, b int) bool {
 		return a < float64(b)
 	})
-	ret, err := funcCall(uf, &tengo.Float{Value: 10.0}, &tengo.Int{Value: 20})
+	ret, err := funcCall(uf, &xgo.Float{Value: 10.0}, &xgo.Int{Value: 20})
 	require.NoError(t, err)
-	require.Equal(t, tengo.TrueValue, ret)
+	require.Equal(t, xgo.TrueValue, ret)
 	_, err = funcCall(uf)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
-	_, err = funcCall(uf, tengo.TrueValue)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
+	_, err = funcCall(uf, xgo.TrueValue)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncAIRSsE(t *testing.T) {
 	uf := stdlib.FuncAIRSsE(func(a int) ([]string, error) {
 		return []string{"foo", "bar"}, nil
 	})
-	ret, err := funcCall(uf, &tengo.Int{Value: 10})
+	ret, err := funcCall(uf, &xgo.Int{Value: 10})
 	require.NoError(t, err)
-	require.Equal(t, array(&tengo.String{Value: "foo"},
-		&tengo.String{Value: "bar"}), ret)
+	require.Equal(t, array(&xgo.String{Value: "foo"},
+		&xgo.String{Value: "bar"}), ret)
 	uf = stdlib.FuncAIRSsE(func(a int) ([]string, error) {
 		return nil, errors.New("some error")
 	})
-	ret, err = funcCall(uf, &tengo.Int{Value: 10})
+	ret, err = funcCall(uf, &xgo.Int{Value: 10})
 	require.NoError(t, err)
 	require.Equal(t,
-		&tengo.Error{Value: &tengo.String{Value: "some error"}}, ret)
+		&xgo.Error{Value: &xgo.String{Value: "some error"}}, ret)
 	_, err = funcCall(uf)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncASSRSs(t *testing.T) {
 	uf := stdlib.FuncASSRSs(func(a, b string) []string {
 		return []string{a, b}
 	})
-	ret, err := funcCall(uf, &tengo.String{Value: "foo"},
-		&tengo.String{Value: "bar"})
+	ret, err := funcCall(uf, &xgo.String{Value: "foo"},
+		&xgo.String{Value: "bar"})
 	require.NoError(t, err)
-	require.Equal(t, array(&tengo.String{Value: "foo"},
-		&tengo.String{Value: "bar"}), ret)
+	require.Equal(t, array(&xgo.String{Value: "foo"},
+		&xgo.String{Value: "bar"}), ret)
 	_, err = funcCall(uf)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncASSIRSs(t *testing.T) {
 	uf := stdlib.FuncASSIRSs(func(a, b string, c int) []string {
 		return []string{a, b, strconv.Itoa(c)}
 	})
-	ret, err := funcCall(uf, &tengo.String{Value: "foo"},
-		&tengo.String{Value: "bar"}, &tengo.Int{Value: 5})
+	ret, err := funcCall(uf, &xgo.String{Value: "foo"},
+		&xgo.String{Value: "bar"}, &xgo.Int{Value: 5})
 	require.NoError(t, err)
-	require.Equal(t, array(&tengo.String{Value: "foo"},
-		&tengo.String{Value: "bar"}, &tengo.String{Value: "5"}), ret)
+	require.Equal(t, array(&xgo.String{Value: "foo"},
+		&xgo.String{Value: "bar"}, &xgo.String{Value: "5"}), ret)
 	_, err = funcCall(uf)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncARB(t *testing.T) {
 	uf := stdlib.FuncARB(func() bool { return true })
 	ret, err := funcCall(uf)
 	require.NoError(t, err)
-	require.Equal(t, tengo.TrueValue, ret)
-	_, err = funcCall(uf, tengo.TrueValue)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	require.Equal(t, xgo.TrueValue, ret)
+	_, err = funcCall(uf, xgo.TrueValue)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncARYE(t *testing.T) {
@@ -425,114 +425,114 @@ func TestFuncARYE(t *testing.T) {
 	})
 	ret, err := funcCall(uf)
 	require.NoError(t, err)
-	require.Equal(t, &tengo.Bytes{Value: []byte("foo bar")}, ret)
+	require.Equal(t, &xgo.Bytes{Value: []byte("foo bar")}, ret)
 	uf = stdlib.FuncARYE(func() ([]byte, error) {
 		return nil, errors.New("some error")
 	})
 	ret, err = funcCall(uf)
 	require.NoError(t, err)
 	require.Equal(t,
-		&tengo.Error{Value: &tengo.String{Value: "some error"}}, ret)
-	_, err = funcCall(uf, tengo.TrueValue)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+		&xgo.Error{Value: &xgo.String{Value: "some error"}}, ret)
+	_, err = funcCall(uf, xgo.TrueValue)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncASRIE(t *testing.T) {
 	uf := stdlib.FuncASRIE(func(a string) (int, error) { return 5, nil })
-	ret, err := funcCall(uf, &tengo.String{Value: "foo"})
+	ret, err := funcCall(uf, &xgo.String{Value: "foo"})
 	require.NoError(t, err)
-	require.Equal(t, &tengo.Int{Value: 5}, ret)
+	require.Equal(t, &xgo.Int{Value: 5}, ret)
 	uf = stdlib.FuncASRIE(func(a string) (int, error) {
 		return 0, errors.New("some error")
 	})
-	ret, err = funcCall(uf, &tengo.String{Value: "foo"})
+	ret, err = funcCall(uf, &xgo.String{Value: "foo"})
 	require.NoError(t, err)
 	require.Equal(t,
-		&tengo.Error{Value: &tengo.String{Value: "some error"}}, ret)
+		&xgo.Error{Value: &xgo.String{Value: "some error"}}, ret)
 	_, err = funcCall(uf)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncAYRIE(t *testing.T) {
 	uf := stdlib.FuncAYRIE(func(a []byte) (int, error) { return 5, nil })
-	ret, err := funcCall(uf, &tengo.Bytes{Value: []byte("foo")})
+	ret, err := funcCall(uf, &xgo.Bytes{Value: []byte("foo")})
 	require.NoError(t, err)
-	require.Equal(t, &tengo.Int{Value: 5}, ret)
+	require.Equal(t, &xgo.Int{Value: 5}, ret)
 	uf = stdlib.FuncAYRIE(func(a []byte) (int, error) {
 		return 0, errors.New("some error")
 	})
-	ret, err = funcCall(uf, &tengo.Bytes{Value: []byte("foo")})
+	ret, err = funcCall(uf, &xgo.Bytes{Value: []byte("foo")})
 	require.NoError(t, err)
 	require.Equal(t,
-		&tengo.Error{Value: &tengo.String{Value: "some error"}}, ret)
+		&xgo.Error{Value: &xgo.String{Value: "some error"}}, ret)
 	_, err = funcCall(uf)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncASSRI(t *testing.T) {
 	uf := stdlib.FuncASSRI(func(a, b string) int { return len(a) + len(b) })
 	ret, err := funcCall(uf,
-		&tengo.String{Value: "foo"}, &tengo.String{Value: "bar"})
+		&xgo.String{Value: "foo"}, &xgo.String{Value: "bar"})
 	require.NoError(t, err)
-	require.Equal(t, &tengo.Int{Value: 6}, ret)
-	_, err = funcCall(uf, &tengo.String{Value: "foo"})
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	require.Equal(t, &xgo.Int{Value: 6}, ret)
+	_, err = funcCall(uf, &xgo.String{Value: "foo"})
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncASSRS(t *testing.T) {
 	uf := stdlib.FuncASSRS(func(a, b string) string { return a + b })
 	ret, err := funcCall(uf,
-		&tengo.String{Value: "foo"}, &tengo.String{Value: "bar"})
+		&xgo.String{Value: "foo"}, &xgo.String{Value: "bar"})
 	require.NoError(t, err)
-	require.Equal(t, &tengo.String{Value: "foobar"}, ret)
-	_, err = funcCall(uf, &tengo.String{Value: "foo"})
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	require.Equal(t, &xgo.String{Value: "foobar"}, ret)
+	_, err = funcCall(uf, &xgo.String{Value: "foo"})
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncASSRB(t *testing.T) {
 	uf := stdlib.FuncASSRB(func(a, b string) bool { return len(a) > len(b) })
 	ret, err := funcCall(uf,
-		&tengo.String{Value: "123"}, &tengo.String{Value: "12"})
+		&xgo.String{Value: "123"}, &xgo.String{Value: "12"})
 	require.NoError(t, err)
-	require.Equal(t, tengo.TrueValue, ret)
-	_, err = funcCall(uf, &tengo.String{Value: "foo"})
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	require.Equal(t, xgo.TrueValue, ret)
+	_, err = funcCall(uf, &xgo.String{Value: "foo"})
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncAIRS(t *testing.T) {
 	uf := stdlib.FuncAIRS(func(a int) string { return strconv.Itoa(a) })
-	ret, err := funcCall(uf, &tengo.Int{Value: 55})
+	ret, err := funcCall(uf, &xgo.Int{Value: 55})
 	require.NoError(t, err)
-	require.Equal(t, &tengo.String{Value: "55"}, ret)
+	require.Equal(t, &xgo.String{Value: "55"}, ret)
 	_, err = funcCall(uf)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncAIRIs(t *testing.T) {
 	uf := stdlib.FuncAIRIs(func(a int) []int { return []int{a, a} })
-	ret, err := funcCall(uf, &tengo.Int{Value: 55})
+	ret, err := funcCall(uf, &xgo.Int{Value: 55})
 	require.NoError(t, err)
-	require.Equal(t, array(&tengo.Int{Value: 55}, &tengo.Int{Value: 55}), ret)
+	require.Equal(t, array(&xgo.Int{Value: 55}, &xgo.Int{Value: 55}), ret)
 	_, err = funcCall(uf)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncAI64R(t *testing.T) {
 	uf := stdlib.FuncAIR(func(a int) {})
-	ret, err := funcCall(uf, &tengo.Int{Value: 55})
+	ret, err := funcCall(uf, &xgo.Int{Value: 55})
 	require.NoError(t, err)
-	require.Equal(t, tengo.UndefinedValue, ret)
+	require.Equal(t, xgo.UndefinedValue, ret)
 	_, err = funcCall(uf)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncARI64(t *testing.T) {
 	uf := stdlib.FuncARI64(func() int64 { return 55 })
 	ret, err := funcCall(uf)
 	require.NoError(t, err)
-	require.Equal(t, &tengo.Int{Value: 55}, ret)
-	_, err = funcCall(uf, &tengo.Int{Value: 55})
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	require.Equal(t, &xgo.Int{Value: 55}, ret)
+	_, err = funcCall(uf, &xgo.Int{Value: 55})
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncASsSRS(t *testing.T) {
@@ -540,31 +540,31 @@ func TestFuncASsSRS(t *testing.T) {
 		return strings.Join(a, b)
 	})
 	ret, err := funcCall(uf,
-		array(&tengo.String{Value: "abc"}, &tengo.String{Value: "def"}),
-		&tengo.String{Value: "-"})
+		array(&xgo.String{Value: "abc"}, &xgo.String{Value: "def"}),
+		&xgo.String{Value: "-"})
 	require.NoError(t, err)
-	require.Equal(t, &tengo.String{Value: "abc-def"}, ret)
+	require.Equal(t, &xgo.String{Value: "abc-def"}, ret)
 	_, err = funcCall(uf)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func TestFuncAI64RI64(t *testing.T) {
 	uf := stdlib.FuncAI64RI64(func(a int64) int64 { return a * 2 })
-	ret, err := funcCall(uf, &tengo.Int{Value: 55})
+	ret, err := funcCall(uf, &xgo.Int{Value: 55})
 	require.NoError(t, err)
-	require.Equal(t, &tengo.Int{Value: 110}, ret)
+	require.Equal(t, &xgo.Int{Value: 110}, ret)
 	_, err = funcCall(uf)
-	require.Equal(t, tengo.ErrWrongNumArguments, err)
+	require.Equal(t, xgo.ErrWrongNumArguments, err)
 }
 
 func funcCall(
-	fn tengo.CallableFunc,
-	args ...tengo.Object,
-) (tengo.Object, error) {
-	userFunc := &tengo.UserFunction{Value: fn}
+	fn xgo.CallableFunc,
+	args ...xgo.Object,
+) (xgo.Object, error) {
+	userFunc := &xgo.UserFunction{Value: fn}
 	return userFunc.Call(args...)
 }
 
-func array(elements ...tengo.Object) *tengo.Array {
-	return &tengo.Array{Value: elements}
+func array(elements ...xgo.Object) *xgo.Array {
+	return &xgo.Array{Value: elements}
 }

stdlib/gensrcmods.go

@@ -10,7 +10,7 @@ import (
 	"strconv"
 )
 
-var tengoModFileRE = regexp.MustCompile(`^srcmod_(\w+).tengo$`)
+var xgoModFileRE = regexp.MustCompile(`^srcmod_(\w+).xgo$`)
 
 func main() {
 	modules := make(map[string]string)
@@ -21,7 +21,7 @@ func main() {
 		log.Fatal(err)
 	}
 	for _, file := range files {
-		m := tengoModFileRE.FindStringSubmatch(file.Name())
+		m := xgoModFileRE.FindStringSubmatch(file.Name())
 		if m != nil {
 			modName := m[1]
 

stdlib/hex.go

@@ -3,10 +3,10 @@ package stdlib
 import (
 	"encoding/hex"
 
-	"github.com/d5/tengo/v2"
+	"surdeus.su/core/xgo/v2"
 )
 
-var hexModule = map[string]tengo.Object{
-	"encode": &tengo.UserFunction{Value: FuncAYRS(hex.EncodeToString)},
-	"decode": &tengo.UserFunction{Value: FuncASRYE(hex.DecodeString)},
+var hexModule = map[string]xgo.Object{
+	"encode": &xgo.UserFunction{Value: FuncAYRS(hex.EncodeToString)},
+	"decode": &xgo.UserFunction{Value: FuncASRYE(hex.DecodeString)},
 }

stdlib/html/element.go

@@ -0,0 +1,136 @@
+package html
+
+import (
+	"surdeus.su/core/xgo/v2"
+	"strings"
+	"html"
+	"fmt"
+)
+
+const RawTag = "raw"
+
+// The type implements basic
+// way to structrize HTML elements.
+type Element struct {
+	xgo.ObjectImpl
+	Tag      string
+	Attr     map[string]string
+	Children []*Element
+	// The value makes sense only if
+	// the tag is the "raw"
+	Content string
+	Final   bool
+}
+
+func (el *Element) TypeName() string {
+	return "*HTMLElement"
+}
+
+// The method renders the element to it's
+// HTML representation.
+func (el *Element) String() string {
+	if el.Tag == RawTag {
+		return html.EscapeString(el.Content)
+	}
+
+	var b strings.Builder
+
+	fmt.Fprintf(&b, "<%s", el.Tag)
+	for k, v := range el.Attr {
+		fmt.Fprintf(&b, " %s=%q", k, v)
+	}
+	fmt.Fprint(&b, ">")
+
+	if el.Final {
+		return b.String()
+	}
+
+	for _, child := range el.Children {
+		if child == nil {
+			continue
+		}
+		fmt.Fprint(&b, child.String())
+	}
+
+	fmt.Fprintf(&b, "</%s>", el.Tag)
+	return b.String()
+}
+
+func MakeElements(args ...xgo.Object) ([]*Element, error) {
+	s := []*Element{}
+	for _, arg := range args {
+		el, ok := arg.(*Element)
+		if !ok {
+			str, ok := xgo.ToString(arg)
+			if ok {
+				s = append(s, &Element{
+					Tag:     RawTag,
+					Content: str,
+				})
+			}
+			continue
+		}
+		s = append(s, el)
+	}
+	return s, nil
+}
+
+func (el *Element) SetBody(
+	args ...xgo.Object,
+) (xgo.Object, error) {
+	els, err := MakeElements(args...)
+	if err != nil {
+		return nil, err
+	}
+	el.Children = els
+	return el, nil
+}
+
+func (el *Element) Add(
+	args ...xgo.Object,
+) (xgo.Object, error) {
+	s, err := MakeElements(args...)
+	if err != nil {
+		return nil, err
+	}
+	el.Children = append(el.Children, s...)
+	return el, nil
+}
+
+func (el *Element) SetFinal(
+	args ...xgo.Object,
+) (xgo.Object, error) {
+	if len(args) > 0 {
+		return nil, xgo.ErrWrongNumArguments
+	}
+	el.Final = true
+	return el, nil
+}
+
+func (el *Element) IndexGet(
+	index xgo.Object,
+) (xgo.Object, error) {
+	arg, ok := xgo.ToString(index)
+	if !ok {
+		return nil, xgo.ErrInvalidIndexValueType
+	}
+
+	switch arg {
+	case "body":
+		return &xgo.UserFunction{
+			Name:  "element.body",
+			Value: el.SetBody,
+		}, nil
+	case "final":
+		return &xgo.UserFunction{
+			Name:  "element.final",
+			Value: el.SetFinal,
+		}, nil
+	case "add":
+		return &xgo.UserFunction{
+			Name:  "element.add",
+			Value: el.Add,
+		}, nil
+	}
+	return nil, nil
+}

stdlib/html/html.go

@@ -0,0 +1,101 @@
+package html
+
+import "surdeus.su/core/xgo/v2"
+
+var Module = map[string]xgo.Object{
+	"Renderer": &xgo.BuiltinFunction{
+		Name: "Renderer",
+		Value: func(args ...xgo.Object) (xgo.Object, error) {
+			ret := &Renderer{}
+			return ret, nil
+		},
+	},
+}
+
+type Renderer struct {
+	xgo.ObjectImpl
+}
+
+func (html *Renderer) TypeName() string {
+	return "html.Renderer"
+}
+
+func (html *Renderer) String() string {
+	return "html.Renderer(...)"
+}
+
+/*
+
+html.div({
+	id: "some-el-id",
+	value: "shit value"
+}).body(
+	html.raw("cock "),
+	html.strong("something")
+)
+
+*/
+
+func (html *Renderer) IndexGet(
+	index xgo.Object,
+) (xgo.Object, error) {
+	str, ok := xgo.ToString(index)
+	if !ok {
+		return nil, xgo.ErrInvalidIndexValueType
+	}
+
+	fn := func(args ...xgo.Object) (xgo.Object, error) {
+		if len(args) > 1 {
+			return nil, xgo.ErrWrongNumArguments
+		}
+		var arg xgo.Object
+		if len(args) == 1 {
+			arg = args[0]
+		}
+
+		if arg == nil {
+			return &Element{
+				Tag: str,
+			}, nil
+		}
+
+		if can := arg.CanIterate(); !can {
+			return nil, xgo.ErrInvalidArgumentType{
+				Name:     "first",
+				Expected: "iterable",
+				Found:    arg.TypeName(),
+			}
+		}
+		attr := map[string]string{}
+		iter := arg.Iterate()
+		for iter.Next() {
+			key, val := iter.Key(), iter.Value()
+			skey, ok := xgo.ToString(key)
+			if !ok {
+				return nil, xgo.ErrInvalidArgumentType{
+					Name:     "attribute(key)",
+					Expected: "stringer",
+					Found:    key.TypeName(),
+				}
+			}
+			sval, ok := xgo.ToString(val)
+			if !ok {
+				return nil, xgo.ErrInvalidArgumentType{
+					Name:     "attribute(value)",
+					Expected: "stringer",
+					Found:    val.TypeName(),
+				}
+			}
+			attr[skey] = sval
+		}
+		return &Element{
+			Tag:  str,
+			Attr: attr,
+		}, nil
+	}
+
+	return &xgo.UserFunction{
+		Name:  str,
+		Value: fn,
+	}, nil
+}

stdlib/http/http.go

@@ -0,0 +1,2 @@
+package http
+

stdlib/http/module.go

@@ -0,0 +1,70 @@
+package http
+
+import "surdeus.su/core/xgo/v2"
+import "net/http"
+import "bytes"
+import tjson "surdeus.su/core/xgo/v2/stdlib/json"
+
+var Module = map[string]xgo.Object{
+	"get": &xgo.BuiltinFunction{
+		Name: "get",
+		Value: func(
+			args ...xgo.Object,
+		) (xgo.Object, error) {
+			if len(args) != 1 {
+				return nil, xgo.ErrWrongNumArguments
+			}
+			url, ok := xgo.ToString(args[0])
+			if !ok {
+				return nil, xgo.ErrInvalidArgumentType{
+					Name:     "first",
+					Expected: "string",
+					Found:    args[0].TypeName(),
+				}
+			}
+			resp, err := http.Get(url)
+			if err != nil {
+				return nil, err
+			}
+			return &Response{
+				Response: resp,
+			}, nil
+		},
+	},
+	"post_json": &xgo.BuiltinFunction{
+		Name: "post",
+		Value: func(
+			args ...xgo.Object,
+		) (xgo.Object, error) {
+			if len(args) < 2 {
+				return nil, xgo.ErrWrongNumArguments
+			}
+			url, ok := xgo.ToString(args[0])
+			if !ok {
+				return nil, xgo.ErrInvalidArgumentType{
+					Name:     "first",
+					Expected: "string",
+					Found:    args[0].TypeName(),
+				}
+			}
+
+			var body bytes.Buffer
+			ret, err := tjson.Encode(args[1])
+			if err != nil {
+				return nil, err
+			}
+			body.Write(ret)
+
+			resp, err := http.Post(
+				url, "application/json",
+				&body,
+			)
+			if err != nil {
+				return nil, err
+			}
+			return &Response{
+				Response: resp,
+			}, nil
+		},
+	},
+}

stdlib/http/request.go

@@ -0,0 +1,49 @@
+package http
+
+import (
+	"surdeus.su/core/xgo/v2"
+	"net/http"
+	"io"
+	//"log"
+	xurl "surdeus.su/core/xgo/v2/stdlib/url"
+)
+
+type Request struct {
+	*http.Request
+	xgo.ObjectImpl
+}
+
+func (r *Request) TypeName() string {
+	return "http.Request"
+}
+
+func (r *Request) String() string {
+	return "http.Request{...}"
+}
+
+func (r *Request) IndexGet(
+	index xgo.Object,
+) (xgo.Object, error) {
+	key, ok := xgo.ToString(index)
+	if !ok {
+		return nil, xgo.ErrInvalidIndexValueType
+	}
+
+	switch key {
+	case "url":
+		return &xurl.URL{
+			URL: r.URL,
+		}, nil
+	case "body":
+		bts, err := io.ReadAll(r.Body)
+		if err != nil {
+			return nil, err
+		}
+		return &xgo.Bytes{
+			Value: bts,
+		}, nil
+	}
+
+	// Nothing found.
+	return nil, nil
+}

stdlib/http/response.go

@@ -0,0 +1,49 @@
+package http
+
+import "net/http"
+import "surdeus.su/core/xgo/v2"
+import "io"
+import tjson "surdeus.su/core/xgo/v2/stdlib/json"
+
+type Response struct {
+	*http.Response
+	xgo.ObjectImpl
+}
+
+func (r *Response) TypeName() string {
+	return "http.Response"
+}
+
+func (r *Response) String() string {
+	return "http.Response{...}"
+}
+
+func (r *Response) IndexGet(
+	index xgo.Object,
+) (xgo.Object, error) {
+	key, ok := xgo.ToString(index)
+	if !ok {
+		return nil, xgo.ErrInvalidIndexValueType
+	}
+
+	switch key {
+	case "body":
+		bts, err := io.ReadAll(r.Body)
+		if err != nil {
+			return nil, err
+		}
+		return &xgo.Bytes{
+			Value: bts,
+		}, nil
+	case "body_json":
+		bts, err := io.ReadAll(r.Body)
+		if err != nil {
+			return nil, err
+		}
+
+		return tjson.Decode(bts)
+	}
+
+	// Nothing found.
+	return nil, nil
+}

stdlib/json.go

@@ -4,53 +4,53 @@ import (
 	"bytes"
 	gojson "encoding/json"
 
-	"github.com/d5/tengo/v2"
-	"github.com/d5/tengo/v2/stdlib/json"
+	"surdeus.su/core/xgo/v2"
+	"surdeus.su/core/xgo/v2/stdlib/json"
 )
 
-var jsonModule = map[string]tengo.Object{
-	"decode": &tengo.UserFunction{
+var jsonModule = map[string]xgo.Object{
+	"decode": &xgo.UserFunction{
 		Name:  "decode",
 		Value: jsonDecode,
 	},
-	"encode": &tengo.UserFunction{
+	"encode": &xgo.UserFunction{
 		Name:  "encode",
 		Value: jsonEncode,
 	},
-	"indent": &tengo.UserFunction{
+	"indent": &xgo.UserFunction{
 		Name:  "encode",
 		Value: jsonIndent,
 	},
-	"html_escape": &tengo.UserFunction{
+	"html_escape": &xgo.UserFunction{
 		Name:  "html_escape",
 		Value: jsonHTMLEscape,
 	},
 }
 
-func jsonDecode(args ...tengo.Object) (ret tengo.Object, err error) {
+func jsonDecode(args ...xgo.Object) (ret xgo.Object, err error) {
 	if len(args) != 1 {
-		return nil, tengo.ErrWrongNumArguments
+		return nil, xgo.ErrWrongNumArguments
 	}
 
 	switch o := args[0].(type) {
-	case *tengo.Bytes:
+	case *xgo.Bytes:
 		v, err := json.Decode(o.Value)
 		if err != nil {
-			return &tengo.Error{
-				Value: &tengo.String{Value: err.Error()},
+			return &xgo.Error{
+				Value: &xgo.String{Value: err.Error()},
 			}, nil
 		}
 		return v, nil
-	case *tengo.String:
+	case *xgo.String:
 		v, err := json.Decode([]byte(o.Value))
 		if err != nil {
-			return &tengo.Error{
-				Value: &tengo.String{Value: err.Error()},
+			return &xgo.Error{
+				Value: &xgo.String{Value: err.Error()},
 			}, nil
 		}
 		return v, nil
 	default:
-		return nil, tengo.ErrInvalidArgumentType{
+		return nil, xgo.ErrInvalidArgumentType{
 			Name:     "first",
 			Expected: "bytes/string",
 			Found:    args[0].TypeName(),
@@ -58,36 +58,36 @@ func jsonDecode(args ...tengo.Object) (ret tengo.Object, err error) {
 	}
 }
 
-func jsonEncode(args ...tengo.Object) (ret tengo.Object, err error) {
+func jsonEncode(args ...xgo.Object) (ret xgo.Object, err error) {
 	if len(args) != 1 {
-		return nil, tengo.ErrWrongNumArguments
+		return nil, xgo.ErrWrongNumArguments
 	}
 
 	b, err := json.Encode(args[0])
 	if err != nil {
-		return &tengo.Error{Value: &tengo.String{Value: err.Error()}}, nil
+		return &xgo.Error{Value: &xgo.String{Value: err.Error()}}, nil
 	}
 
-	return &tengo.Bytes{Value: b}, nil
+	return &xgo.Bytes{Value: b}, nil
 }
 
-func jsonIndent(args ...tengo.Object) (ret tengo.Object, err error) {
+func jsonIndent(args ...xgo.Object) (ret xgo.Object, err error) {
 	if len(args) != 3 {
-		return nil, tengo.ErrWrongNumArguments
+		return nil, xgo.ErrWrongNumArguments
 	}
 
-	prefix, ok := tengo.ToString(args[1])
+	prefix, ok := xgo.ToString(args[1])
 	if !ok {
-		return nil, tengo.ErrInvalidArgumentType{
+		return nil, xgo.ErrInvalidArgumentType{
 			Name:     "prefix",
 			Expected: "string(compatible)",
 			Found:    args[1].TypeName(),
 		}
 	}
 
-	indent, ok := tengo.ToString(args[2])
+	indent, ok := xgo.ToString(args[2])
 	if !ok {
-		return nil, tengo.ErrInvalidArgumentType{
+		return nil, xgo.ErrInvalidArgumentType{
 			Name:     "indent",
 			Expected: "string(compatible)",
 			Found:    args[2].TypeName(),
@@ -95,26 +95,26 @@ func jsonIndent(args ...tengo.Object) (ret tengo.Object, err error) {
 	}
 
 	switch o := args[0].(type) {
-	case *tengo.Bytes:
+	case *xgo.Bytes:
 		var dst bytes.Buffer
 		err := gojson.Indent(&dst, o.Value, prefix, indent)
 		if err != nil {
-			return &tengo.Error{
-				Value: &tengo.String{Value: err.Error()},
+			return &xgo.Error{
+				Value: &xgo.String{Value: err.Error()},
 			}, nil
 		}
-		return &tengo.Bytes{Value: dst.Bytes()}, nil
-	case *tengo.String:
+		return &xgo.Bytes{Value: dst.Bytes()}, nil
+	case *xgo.String:
 		var dst bytes.Buffer
 		err := gojson.Indent(&dst, []byte(o.Value), prefix, indent)
 		if err != nil {
-			return &tengo.Error{
-				Value: &tengo.String{Value: err.Error()},
+			return &xgo.Error{
+				Value: &xgo.String{Value: err.Error()},
 			}, nil
 		}
-		return &tengo.Bytes{Value: dst.Bytes()}, nil
+		return &xgo.Bytes{Value: dst.Bytes()}, nil
 	default:
-		return nil, tengo.ErrInvalidArgumentType{
+		return nil, xgo.ErrInvalidArgumentType{
 			Name:     "first",
 			Expected: "bytes/string",
 			Found:    args[0].TypeName(),
@@ -122,22 +122,22 @@ func jsonIndent(args ...tengo.Object) (ret tengo.Object, err error) {
 	}
 }
 
-func jsonHTMLEscape(args ...tengo.Object) (ret tengo.Object, err error) {
+func jsonHTMLEscape(args ...xgo.Object) (ret xgo.Object, err error) {
 	if len(args) != 1 {
-		return nil, tengo.ErrWrongNumArguments
+		return nil, xgo.ErrWrongNumArguments
 	}
 
 	switch o := args[0].(type) {
-	case *tengo.Bytes:
+	case *xgo.Bytes:
 		var dst bytes.Buffer
 		gojson.HTMLEscape(&dst, o.Value)
-		return &tengo.Bytes{Value: dst.Bytes()}, nil
-	case *tengo.String:
+		return &xgo.Bytes{Value: dst.Bytes()}, nil
+	case *xgo.String:
 		var dst bytes.Buffer
 		gojson.HTMLEscape(&dst, []byte(o.Value))
-		return &tengo.Bytes{Value: dst.Bytes()}, nil
+		return &xgo.Bytes{Value: dst.Bytes()}, nil
 	default:
-		return nil, tengo.ErrInvalidArgumentType{
+		return nil, xgo.ErrInvalidArgumentType{
 			Name:     "first",
 			Expected: "bytes/string",
 			Found:    args[0].TypeName(),

stdlib/json/decode.go

@@ -12,11 +12,11 @@ import (
 	"unicode/utf16"
 	"unicode/utf8"
 
-	"github.com/d5/tengo/v2"
+	"surdeus.su/core/xgo/v2"
 )
 
 // Decode parses the JSON-encoded data and returns the result object.
-func Decode(data []byte) (tengo.Object, error) {
+func Decode(data []byte) (xgo.Object, error) {
 	var d decodeState
 	err := checkValid(data, &d.scan)
 	if err != nil {
@@ -82,7 +82,7 @@ func (d *decodeState) scanWhile(op int) (isFloat bool) {
 	return
 }
 
-func (d *decodeState) value() (tengo.Object, error) {
+func (d *decodeState) value() (xgo.Object, error) {
 	switch d.opcode {
 	default:
 		panic(phasePanicMsg)
@@ -105,8 +105,8 @@ func (d *decodeState) value() (tengo.Object, error) {
 	}
 }
 
-func (d *decodeState) array() (tengo.Object, error) {
-	var arr []tengo.Object
+func (d *decodeState) array() (xgo.Object, error) {
+	var arr []xgo.Object
 	for {
 		// Look ahead for ] - can only happen on first iteration.
 		d.scanWhile(scanSkipSpace)
@@ -130,11 +130,11 @@ func (d *decodeState) array() (tengo.Object, error) {
 			panic(phasePanicMsg)
 		}
 	}
-	return &tengo.Array{Value: arr}, nil
+	return &xgo.Array{Value: arr}, nil
 }
 
-func (d *decodeState) object() (tengo.Object, error) {
-	m := make(map[string]tengo.Object)
+func (d *decodeState) object() (xgo.Object, error) {
+	m := make(map[string]xgo.Object)
 	for {
 		// Read opening " of string key or closing }.
 		d.scanWhile(scanSkipSpace)
@@ -183,10 +183,10 @@ func (d *decodeState) object() (tengo.Object, error) {
 			panic(phasePanicMsg)
 		}
 	}
-	return &tengo.Map{Value: m}, nil
+	return &xgo.Map{Value: m}, nil
 }
 
-func (d *decodeState) literal() (tengo.Object, error) {
+func (d *decodeState) literal() (xgo.Object, error) {
 	// All bytes inside literal return scanContinue op code.
 	start := d.readIndex()
 	isFloat := d.scanWhile(scanContinue)
@@ -195,20 +195,20 @@ func (d *decodeState) literal() (tengo.Object, error) {
 
 	switch c := item[0]; c {
 	case 'n': // null
-		return tengo.UndefinedValue, nil
+		return xgo.UndefinedValue, nil
 
 	case 't', 'f': // true, false
 		if c == 't' {
-			return tengo.TrueValue, nil
+			return xgo.TrueValue, nil
 		}
-		return tengo.FalseValue, nil
+		return xgo.FalseValue, nil
 
 	case '"': // string
 		s, ok := unquote(item)
 		if !ok {
 			panic(phasePanicMsg)
 		}
-		return &tengo.String{Value: s}, nil
+		return &xgo.String{Value: s}, nil
 
 	default: // number
 		if c != '-' && (c < '0' || c > '9') {
@@ -216,10 +216,10 @@ func (d *decodeState) literal() (tengo.Object, error) {
 		}
 		if isFloat {
 			n, _ := strconv.ParseFloat(string(item), 10)
-			return &tengo.Float{Value: n}, nil
+			return &xgo.Float{Value: n}, nil
 		}
 		n, _ := strconv.ParseInt(string(item), 10, 64)
-		return &tengo.Int{Value: n}, nil
+		return &xgo.Int{Value: n}, nil
 	}
 }
 

stdlib/json/encode.go

@@ -14,7 +14,7 @@ import (
 	"strconv"
 	"unicode/utf8"
 
-	"github.com/d5/tengo/v2"
+	"surdeus.su/core/xgo/v2"
 )
 
 // safeSet holds the value true if the ASCII character with the given array
@@ -125,11 +125,11 @@ var safeSet = [utf8.RuneSelf]bool{
 var hex = "0123456789abcdef"
 
 // Encode returns the JSON encoding of the object.
-func Encode(o tengo.Object) ([]byte, error) {
+func Encode(o xgo.Object) ([]byte, error) {
 	var b []byte
 
 	switch o := o.(type) {
-	case *tengo.Array:
+	case *xgo.Array:
 		b = append(b, '[')
 		len1 := len(o.Value) - 1
 		for idx, elem := range o.Value {
@@ -143,7 +143,7 @@ func Encode(o tengo.Object) ([]byte, error) {
 			}
 		}
 		b = append(b, ']')
-	case *tengo.ImmutableArray:
+	case *xgo.ImmutableArray:
 		b = append(b, '[')
 		len1 := len(o.Value) - 1
 		for idx, elem := range o.Value {
@@ -157,7 +157,7 @@ func Encode(o tengo.Object) ([]byte, error) {
 			}
 		}
 		b = append(b, ']')
-	case *tengo.Map:
+	case *xgo.Map:
 		b = append(b, '{')
 		len1 := len(o.Value) - 1
 		idx := 0
@@ -175,7 +175,7 @@ func Encode(o tengo.Object) ([]byte, error) {
 			idx++
 		}
 		b = append(b, '}')
-	case *tengo.ImmutableMap:
+	case *xgo.ImmutableMap:
 		b = append(b, '{')
 		len1 := len(o.Value) - 1
 		idx := 0
@@ -193,22 +193,22 @@ func Encode(o tengo.Object) ([]byte, error) {
 			idx++
 		}
 		b = append(b, '}')
-	case *tengo.Bool:
+	case *xgo.Bool:
 		if o.IsFalsy() {
 			b = strconv.AppendBool(b, false)
 		} else {
 			b = strconv.AppendBool(b, true)
 		}
-	case *tengo.Bytes:
+	case *xgo.Bytes:
 		b = append(b, '"')
 		encodedLen := base64.StdEncoding.EncodedLen(len(o.Value))
 		dst := make([]byte, encodedLen)
 		base64.StdEncoding.Encode(dst, o.Value)
 		b = append(b, dst...)
 		b = append(b, '"')
-	case *tengo.Char:
+	case *xgo.Char:
 		b = strconv.AppendInt(b, int64(o.Value), 10)
-	case *tengo.Float:
+	case *xgo.Float:
 		var y []byte
 
 		f := o.Value
@@ -236,19 +236,19 @@ func Encode(o tengo.Object) ([]byte, error) {
 		}
 
 		b = append(b, y...)
-	case *tengo.Int:
+	case *xgo.Int:
 		b = strconv.AppendInt(b, o.Value, 10)
-	case *tengo.String:
+	case *xgo.String:
 		// string encoding bug is fixed with newly introduced function
-		// encodeString(). See: https://github.com/d5/tengo/issues/268
+		// encodeString(). See: https://github.com/d5/xgo/issues/268
 		b = encodeString(b, o.Value)
-	case *tengo.Time:
+	case *xgo.Time:
 		y, err := o.Value.MarshalJSON()
 		if err != nil {
 			return nil, err
 		}
 		b = append(b, y...)
-	case *tengo.Undefined:
+	case *xgo.Undefined:
 		b = append(b, "null"...)
 	default:
 		// unknown type: ignore

stdlib/json/json_test.go

@@ -4,9 +4,9 @@ import (
 	gojson "encoding/json"
 	"testing"
 
-	"github.com/d5/tengo/v2"
-	"github.com/d5/tengo/v2/require"
-	"github.com/d5/tengo/v2/stdlib/json"
+	"surdeus.su/core/xgo/v2"
+	"surdeus.su/core/xgo/v2/require"
+	"surdeus.su/core/xgo/v2/stdlib/json"
 )
 
 type ARR = []interface{}
@@ -31,7 +31,7 @@ func TestJSON(t *testing.T) {
 	testJSONEncodeDecode(t, "foo")
 	testJSONEncodeDecode(t, "foo bar")
 	testJSONEncodeDecode(t, "foo \"bar\"")
-	// See: https://github.com/d5/tengo/issues/268
+	// See: https://github.com/d5/xgo/issues/268
 	testJSONEncodeDecode(t, "1\u001C04")
 	testJSONEncodeDecode(t, "çığöşü")
 	testJSONEncodeDecode(t, "ç1\u001C04IĞÖŞÜ")
@@ -92,7 +92,7 @@ func testDecodeError(t *testing.T, input string) {
 }
 
 func testJSONEncodeDecode(t *testing.T, v interface{}) {
-	o, err := tengo.FromInterface(v)
+	o, err := xgo.FromInterface(v)
 	require.NoError(t, err)
 
 	b, err := json.Encode(o)
@@ -104,7 +104,7 @@ func testJSONEncodeDecode(t *testing.T, v interface{}) {
 	vj, err := gojson.Marshal(v)
 	require.NoError(t, err)
 
-	aj, err := gojson.Marshal(tengo.ToInterface(a))
+	aj, err := gojson.Marshal(xgo.ToInterface(a))
 	require.NoError(t, err)
 
 	require.Equal(t, vj, aj)

stdlib/log/main.go

@@ -0,0 +1,76 @@
+package log
+
+import "surdeus.su/core/xgo/v2"
+import "log"
+
+var Module = map[string]xgo.Object{
+	"printf": &xgo.BuiltinFunction{
+		Name: "printf",
+		Value: func(
+			args ...xgo.Object,
+		) (xgo.Object, error) {
+			if len(args) < 1 {
+				return nil, xgo.ErrWrongNumArguments
+			}
+
+			formatObject := args[0]
+			format, hasFormat := xgo.ToString(
+				formatObject,
+			)
+			if !hasFormat {
+				return nil, xgo.ErrInvalidArgumentType{
+					Name:     "first",
+					Expected: "string",
+					Found:    formatObject.TypeName(),
+				}
+			}
+
+			/*v := make([]any, len(args[1:]))
+			for i, o := range args[1:] {
+				v[i] = xgo.ToInterface(o)
+			}*/
+
+			str, err := xgo.Format(format, args...)
+			if err != nil {
+				return nil, err
+			}
+			log.Print(str)
+
+			return nil, nil
+		},
+	},
+	"print": &xgo.BuiltinFunction{
+		Name: "print",
+		Value: func(
+			args ...xgo.Object,
+		) (xgo.Object, error) {
+			v := make([]any, len(args))
+			for i, o := range args {
+				var ok bool
+				v[i], ok = xgo.ToString(o)
+				if !ok {
+					v[i] = xgo.Undefined{}
+				}
+			}
+			log.Print(v...)
+			return nil, nil
+		},
+	},
+	"println": &xgo.BuiltinFunction{
+		Name: "println",
+		Value: func(
+			args ...xgo.Object,
+		) (xgo.Object, error) {
+			v := make([]any, len(args))
+			for i, o := range args {
+				var ok bool
+				v[i], ok = xgo.ToString(o)
+				if !ok {
+					v[i] = xgo.Undefined{}
+				}
+			}
+			log.Println(v...)
+			return nil, nil
+		},
+	},
+}

stdlib/math.go

@@ -3,244 +3,244 @@ package stdlib
 import (
 	"math"
 
-	"github.com/d5/tengo/v2"
+	"surdeus.su/core/xgo/v2"
 )
 
-var mathModule = map[string]tengo.Object{
-	"e":                      &tengo.Float{Value: math.E},
-	"pi":                     &tengo.Float{Value: math.Pi},
-	"phi":                    &tengo.Float{Value: math.Phi},
-	"sqrt2":                  &tengo.Float{Value: math.Sqrt2},
-	"sqrtE":                  &tengo.Float{Value: math.SqrtE},
-	"sqrtPi":                 &tengo.Float{Value: math.SqrtPi},
-	"sqrtPhi":                &tengo.Float{Value: math.SqrtPhi},
-	"ln2":                    &tengo.Float{Value: math.Ln2},
-	"log2E":                  &tengo.Float{Value: math.Log2E},
-	"ln10":                   &tengo.Float{Value: math.Ln10},
-	"log10E":                 &tengo.Float{Value: math.Log10E},
-	"maxFloat32":             &tengo.Float{Value: math.MaxFloat32},
-	"smallestNonzeroFloat32": &tengo.Float{Value: math.SmallestNonzeroFloat32},
-	"maxFloat64":             &tengo.Float{Value: math.MaxFloat64},
-	"smallestNonzeroFloat64": &tengo.Float{Value: math.SmallestNonzeroFloat64},
-	"maxInt":                 &tengo.Int{Value: math.MaxInt},
-	"minInt":                 &tengo.Int{Value: math.MinInt},
-	"maxInt8":                &tengo.Int{Value: math.MaxInt8},
-	"minInt8":                &tengo.Int{Value: math.MinInt8},
-	"maxInt16":               &tengo.Int{Value: math.MaxInt16},
-	"minInt16":               &tengo.Int{Value: math.MinInt16},
-	"maxInt32":               &tengo.Int{Value: math.MaxInt32},
-	"minInt32":               &tengo.Int{Value: math.MinInt32},
-	"maxInt64":               &tengo.Int{Value: math.MaxInt64},
-	"minInt64":               &tengo.Int{Value: math.MinInt64},
-	"abs": &tengo.UserFunction{
+var mathModule = map[string]xgo.Object{
+	"e":                      &xgo.Float{Value: math.E},
+	"pi":                     &xgo.Float{Value: math.Pi},
+	"phi":                    &xgo.Float{Value: math.Phi},
+	"sqrt2":                  &xgo.Float{Value: math.Sqrt2},
+	"sqrtE":                  &xgo.Float{Value: math.SqrtE},
+	"sqrtPi":                 &xgo.Float{Value: math.SqrtPi},
+	"sqrtPhi":                &xgo.Float{Value: math.SqrtPhi},
+	"ln2":                    &xgo.Float{Value: math.Ln2},
+	"log2E":                  &xgo.Float{Value: math.Log2E},
+	"ln10":                   &xgo.Float{Value: math.Ln10},
+	"log10E":                 &xgo.Float{Value: math.Log10E},
+	"maxFloat32":             &xgo.Float{Value: math.MaxFloat32},
+	"smallestNonzeroFloat32": &xgo.Float{Value: math.SmallestNonzeroFloat32},
+	"maxFloat64":             &xgo.Float{Value: math.MaxFloat64},
+	"smallestNonzeroFloat64": &xgo.Float{Value: math.SmallestNonzeroFloat64},
+	"maxInt":                 &xgo.Int{Value: math.MaxInt},
+	"minInt":                 &xgo.Int{Value: math.MinInt},
+	"maxInt8":                &xgo.Int{Value: math.MaxInt8},
+	"minInt8":                &xgo.Int{Value: math.MinInt8},
+	"maxInt16":               &xgo.Int{Value: math.MaxInt16},
+	"minInt16":               &xgo.Int{Value: math.MinInt16},
+	"maxInt32":               &xgo.Int{Value: math.MaxInt32},
+	"minInt32":               &xgo.Int{Value: math.MinInt32},
+	"maxInt64":               &xgo.Int{Value: math.MaxInt64},
+	"minInt64":               &xgo.Int{Value: math.MinInt64},
+	"abs": &xgo.UserFunction{
 		Name:  "abs",
 		Value: FuncAFRF(math.Abs),
 	},
-	"acos": &tengo.UserFunction{
+	"acos": &xgo.UserFunction{
 		Name:  "acos",
 		Value: FuncAFRF(math.Acos),
 	},
-	"acosh": &tengo.UserFunction{
+	"acosh": &xgo.UserFunction{
 		Name:  "acosh",
 		Value: FuncAFRF(math.Acosh),
 	},
-	"asin": &tengo.UserFunction{
+	"asin": &xgo.UserFunction{
 		Name:  "asin",
 		Value: FuncAFRF(math.Asin),
 	},
-	"asinh": &tengo.UserFunction{
+	"asinh": &xgo.UserFunction{
 		Name:  "asinh",
 		Value: FuncAFRF(math.Asinh),
 	},
-	"atan": &tengo.UserFunction{
+	"atan": &xgo.UserFunction{
 		Name:  "atan",
 		Value: FuncAFRF(math.Atan),
 	},
-	"atan2": &tengo.UserFunction{
+	"atan2": &xgo.UserFunction{
 		Name:  "atan2",
 		Value: FuncAFFRF(math.Atan2),
 	},
-	"atanh": &tengo.UserFunction{
+	"atanh": &xgo.UserFunction{
 		Name:  "atanh",
 		Value: FuncAFRF(math.Atanh),
 	},
-	"cbrt": &tengo.UserFunction{
+	"cbrt": &xgo.UserFunction{
 		Name:  "cbrt",
 		Value: FuncAFRF(math.Cbrt),
 	},
-	"ceil": &tengo.UserFunction{
+	"ceil": &xgo.UserFunction{
 		Name:  "ceil",
 		Value: FuncAFRF(math.Ceil),
 	},
-	"copysign": &tengo.UserFunction{
+	"copysign": &xgo.UserFunction{
 		Name:  "copysign",
 		Value: FuncAFFRF(math.Copysign),
 	},
-	"cos": &tengo.UserFunction{
+	"cos": &xgo.UserFunction{
 		Name:  "cos",
 		Value: FuncAFRF(math.Cos),
 	},
-	"cosh": &tengo.UserFunction{
+	"cosh": &xgo.UserFunction{
 		Name:  "cosh",
 		Value: FuncAFRF(math.Cosh),
 	},
-	"dim": &tengo.UserFunction{
+	"dim": &xgo.UserFunction{
 		Name:  "dim",
 		Value: FuncAFFRF(math.Dim),
 	},
-	"erf": &tengo.UserFunction{
+	"erf": &xgo.UserFunction{
 		Name:  "erf",
 		Value: FuncAFRF(math.Erf),
 	},
-	"erfc": &tengo.UserFunction{
+	"erfc": &xgo.UserFunction{
 		Name:  "erfc",
 		Value: FuncAFRF(math.Erfc),
 	},
-	"exp": &tengo.UserFunction{
+	"exp": &xgo.UserFunction{
 		Name:  "exp",
 		Value: FuncAFRF(math.Exp),
 	},
-	"exp2": &tengo.UserFunction{
+	"exp2": &xgo.UserFunction{
 		Name:  "exp2",
 		Value: FuncAFRF(math.Exp2),
 	},
-	"expm1": &tengo.UserFunction{
+	"expm1": &xgo.UserFunction{
 		Name:  "expm1",
 		Value: FuncAFRF(math.Expm1),
 	},
-	"floor": &tengo.UserFunction{
+	"floor": &xgo.UserFunction{
 		Name:  "floor",
 		Value: FuncAFRF(math.Floor),
 	},
-	"gamma": &tengo.UserFunction{
+	"gamma": &xgo.UserFunction{
 		Name:  "gamma",
 		Value: FuncAFRF(math.Gamma),
 	},
-	"hypot": &tengo.UserFunction{
+	"hypot": &xgo.UserFunction{
 		Name:  "hypot",
 		Value: FuncAFFRF(math.Hypot),
 	},
-	"ilogb": &tengo.UserFunction{
+	"ilogb": &xgo.UserFunction{
 		Name:  "ilogb",
 		Value: FuncAFRI(math.Ilogb),
 	},
-	"inf": &tengo.UserFunction{
+	"inf": &xgo.UserFunction{
 		Name:  "inf",
 		Value: FuncAIRF(math.Inf),
 	},
-	"is_inf": &tengo.UserFunction{
+	"is_inf": &xgo.UserFunction{
 		Name:  "is_inf",
 		Value: FuncAFIRB(math.IsInf),
 	},
-	"is_nan": &tengo.UserFunction{
+	"is_nan": &xgo.UserFunction{
 		Name:  "is_nan",
 		Value: FuncAFRB(math.IsNaN),
 	},
-	"j0": &tengo.UserFunction{
+	"j0": &xgo.UserFunction{
 		Name:  "j0",
 		Value: FuncAFRF(math.J0),
 	},
-	"j1": &tengo.UserFunction{
+	"j1": &xgo.UserFunction{
 		Name:  "j1",
 		Value: FuncAFRF(math.J1),
 	},
-	"jn": &tengo.UserFunction{
+	"jn": &xgo.UserFunction{
 		Name:  "jn",
 		Value: FuncAIFRF(math.Jn),
 	},
-	"ldexp": &tengo.UserFunction{
+	"ldexp": &xgo.UserFunction{
 		Name:  "ldexp",
 		Value: FuncAFIRF(math.Ldexp),
 	},
-	"log": &tengo.UserFunction{
+	"log": &xgo.UserFunction{
 		Name:  "log",
 		Value: FuncAFRF(math.Log),
 	},
-	"log10": &tengo.UserFunction{
+	"log10": &xgo.UserFunction{
 		Name:  "log10",
 		Value: FuncAFRF(math.Log10),
 	},
-	"log1p": &tengo.UserFunction{
+	"log1p": &xgo.UserFunction{
 		Name:  "log1p",
 		Value: FuncAFRF(math.Log1p),
 	},
-	"log2": &tengo.UserFunction{
+	"log2": &xgo.UserFunction{
 		Name:  "log2",
 		Value: FuncAFRF(math.Log2),
 	},
-	"logb": &tengo.UserFunction{
+	"logb": &xgo.UserFunction{
 		Name:  "logb",
 		Value: FuncAFRF(math.Logb),
 	},
-	"max": &tengo.UserFunction{
+	"max": &xgo.UserFunction{
 		Name:  "max",
 		Value: FuncAFFRF(math.Max),
 	},
-	"min": &tengo.UserFunction{
+	"min": &xgo.UserFunction{
 		Name:  "min",
 		Value: FuncAFFRF(math.Min),
 	},
-	"mod": &tengo.UserFunction{
+	"mod": &xgo.UserFunction{
 		Name:  "mod",
 		Value: FuncAFFRF(math.Mod),
 	},
-	"nan": &tengo.UserFunction{
+	"nan": &xgo.UserFunction{
 		Name:  "nan",
 		Value: FuncARF(math.NaN),
 	},
-	"nextafter": &tengo.UserFunction{
+	"nextafter": &xgo.UserFunction{
 		Name:  "nextafter",
 		Value: FuncAFFRF(math.Nextafter),
 	},
-	"pow": &tengo.UserFunction{
+	"pow": &xgo.UserFunction{
 		Name:  "pow",
 		Value: FuncAFFRF(math.Pow),
 	},
-	"pow10": &tengo.UserFunction{
+	"pow10": &xgo.UserFunction{
 		Name:  "pow10",
 		Value: FuncAIRF(math.Pow10),
 	},
-	"remainder": &tengo.UserFunction{
+	"remainder": &xgo.UserFunction{
 		Name:  "remainder",
 		Value: FuncAFFRF(math.Remainder),
 	},
-	"signbit": &tengo.UserFunction{
+	"signbit": &xgo.UserFunction{
 		Name:  "signbit",
 		Value: FuncAFRB(math.Signbit),
 	},
-	"sin": &tengo.UserFunction{
+	"sin": &xgo.UserFunction{
 		Name:  "sin",
 		Value: FuncAFRF(math.Sin),
 	},
-	"sinh": &tengo.UserFunction{
+	"sinh": &xgo.UserFunction{
 		Name:  "sinh",
 		Value: FuncAFRF(math.Sinh),
 	},
-	"sqrt": &tengo.UserFunction{
+	"sqrt": &xgo.UserFunction{
 		Name:  "sqrt",
 		Value: FuncAFRF(math.Sqrt),
 	},
-	"tan": &tengo.UserFunction{
+	"tan": &xgo.UserFunction{
 		Name:  "tan",
 		Value: FuncAFRF(math.Tan),
 	},
-	"tanh": &tengo.UserFunction{
+	"tanh": &xgo.UserFunction{
 		Name:  "tanh",
 		Value: FuncAFRF(math.Tanh),
 	},
-	"trunc": &tengo.UserFunction{
+	"trunc": &xgo.UserFunction{
 		Name:  "trunc",
 		Value: FuncAFRF(math.Trunc),
 	},
-	"y0": &tengo.UserFunction{
+	"y0": &xgo.UserFunction{
 		Name:  "y0",
 		Value: FuncAFRF(math.Y0),
 	},
-	"y1": &tengo.UserFunction{
+	"y1": &xgo.UserFunction{
 		Name:  "y1",
 		Value: FuncAFRF(math.Y1),
 	},
-	"yn": &tengo.UserFunction{
+	"yn": &xgo.UserFunction{
 		Name:  "yn",
 		Value: FuncAIFRF(math.Yn),
 	},

stdlib/os.go

@@ -8,208 +8,208 @@ import (
 	"os/exec"
 	"runtime"
 
-	"github.com/d5/tengo/v2"
+	"surdeus.su/core/xgo/v2"
 )
 
-var osModule = map[string]tengo.Object{
-	"platform":            &tengo.String{Value: runtime.GOOS},
-	"arch":                &tengo.String{Value: runtime.GOARCH},
-	"o_rdonly":            &tengo.Int{Value: int64(os.O_RDONLY)},
-	"o_wronly":            &tengo.Int{Value: int64(os.O_WRONLY)},
-	"o_rdwr":              &tengo.Int{Value: int64(os.O_RDWR)},
-	"o_append":            &tengo.Int{Value: int64(os.O_APPEND)},
-	"o_create":            &tengo.Int{Value: int64(os.O_CREATE)},
-	"o_excl":              &tengo.Int{Value: int64(os.O_EXCL)},
-	"o_sync":              &tengo.Int{Value: int64(os.O_SYNC)},
-	"o_trunc":             &tengo.Int{Value: int64(os.O_TRUNC)},
-	"mode_dir":            &tengo.Int{Value: int64(os.ModeDir)},
-	"mode_append":         &tengo.Int{Value: int64(os.ModeAppend)},
-	"mode_exclusive":      &tengo.Int{Value: int64(os.ModeExclusive)},
-	"mode_temporary":      &tengo.Int{Value: int64(os.ModeTemporary)},
-	"mode_symlink":        &tengo.Int{Value: int64(os.ModeSymlink)},
-	"mode_device":         &tengo.Int{Value: int64(os.ModeDevice)},
-	"mode_named_pipe":     &tengo.Int{Value: int64(os.ModeNamedPipe)},
-	"mode_socket":         &tengo.Int{Value: int64(os.ModeSocket)},
-	"mode_setuid":         &tengo.Int{Value: int64(os.ModeSetuid)},
-	"mode_setgui":         &tengo.Int{Value: int64(os.ModeSetgid)},
-	"mode_char_device":    &tengo.Int{Value: int64(os.ModeCharDevice)},
-	"mode_sticky":         &tengo.Int{Value: int64(os.ModeSticky)},
-	"mode_type":           &tengo.Int{Value: int64(os.ModeType)},
-	"mode_perm":           &tengo.Int{Value: int64(os.ModePerm)},
-	"path_separator":      &tengo.Char{Value: os.PathSeparator},
-	"path_list_separator": &tengo.Char{Value: os.PathListSeparator},
-	"dev_null":            &tengo.String{Value: os.DevNull},
-	"seek_set":            &tengo.Int{Value: int64(io.SeekStart)},
-	"seek_cur":            &tengo.Int{Value: int64(io.SeekCurrent)},
-	"seek_end":            &tengo.Int{Value: int64(io.SeekEnd)},
-	"args": &tengo.UserFunction{
+var osModule = map[string]xgo.Object{
+	"platform":            &xgo.String{Value: runtime.GOOS},
+	"arch":                &xgo.String{Value: runtime.GOARCH},
+	"o_rdonly":            &xgo.Int{Value: int64(os.O_RDONLY)},
+	"o_wronly":            &xgo.Int{Value: int64(os.O_WRONLY)},
+	"o_rdwr":              &xgo.Int{Value: int64(os.O_RDWR)},
+	"o_append":            &xgo.Int{Value: int64(os.O_APPEND)},
+	"o_create":            &xgo.Int{Value: int64(os.O_CREATE)},
+	"o_excl":              &xgo.Int{Value: int64(os.O_EXCL)},
+	"o_sync":              &xgo.Int{Value: int64(os.O_SYNC)},
+	"o_trunc":             &xgo.Int{Value: int64(os.O_TRUNC)},
+	"mode_dir":            &xgo.Int{Value: int64(os.ModeDir)},
+	"mode_append":         &xgo.Int{Value: int64(os.ModeAppend)},
+	"mode_exclusive":      &xgo.Int{Value: int64(os.ModeExclusive)},
+	"mode_temporary":      &xgo.Int{Value: int64(os.ModeTemporary)},
+	"mode_symlink":        &xgo.Int{Value: int64(os.ModeSymlink)},
+	"mode_device":         &xgo.Int{Value: int64(os.ModeDevice)},
+	"mode_named_pipe":     &xgo.Int{Value: int64(os.ModeNamedPipe)},
+	"mode_socket":         &xgo.Int{Value: int64(os.ModeSocket)},
+	"mode_setuid":         &xgo.Int{Value: int64(os.ModeSetuid)},
+	"mode_setgui":         &xgo.Int{Value: int64(os.ModeSetgid)},
+	"mode_char_device":    &xgo.Int{Value: int64(os.ModeCharDevice)},
+	"mode_sticky":         &xgo.Int{Value: int64(os.ModeSticky)},
+	"mode_type":           &xgo.Int{Value: int64(os.ModeType)},
+	"mode_perm":           &xgo.Int{Value: int64(os.ModePerm)},
+	"path_separator":      &xgo.Char{Value: os.PathSeparator},
+	"path_list_separator": &xgo.Char{Value: os.PathListSeparator},
+	"dev_null":            &xgo.String{Value: os.DevNull},
+	"seek_set":            &xgo.Int{Value: int64(io.SeekStart)},
+	"seek_cur":            &xgo.Int{Value: int64(io.SeekCurrent)},
+	"seek_end":            &xgo.Int{Value: int64(io.SeekEnd)},
+	"args": &xgo.UserFunction{
 		Name:  "args",
 		Value: osArgs,
 	}, // args() => array(string)
-	"chdir": &tengo.UserFunction{
+	"chdir": &xgo.UserFunction{
 		Name:  "chdir",
 		Value: FuncASRE(os.Chdir),
 	}, // chdir(dir string) => error
 	"chmod": osFuncASFmRE("chmod", os.Chmod), // chmod(name string, mode int) => error
-	"chown": &tengo.UserFunction{
+	"chown": &xgo.UserFunction{
 		Name:  "chown",
 		Value: FuncASIIRE(os.Chown),
 	}, // chown(name string, uid int, gid int) => error
-	"clearenv": &tengo.UserFunction{
+	"clearenv": &xgo.UserFunction{
 		Name:  "clearenv",
 		Value: FuncAR(os.Clearenv),
 	}, // clearenv()
-	"environ": &tengo.UserFunction{
+	"environ": &xgo.UserFunction{
 		Name:  "environ",
 		Value: FuncARSs(os.Environ),
 	}, // environ() => array(string)
-	"exit": &tengo.UserFunction{
+	"exit": &xgo.UserFunction{
 		Name:  "exit",
 		Value: FuncAIR(os.Exit),
 	}, // exit(code int)
-	"expand_env": &tengo.UserFunction{
+	"expand_env": &xgo.UserFunction{
 		Name:  "expand_env",
 		Value: osExpandEnv,
 	}, // expand_env(s string) => string
-	"getegid": &tengo.UserFunction{
+	"getegid": &xgo.UserFunction{
 		Name:  "getegid",
 		Value: FuncARI(os.Getegid),
 	}, // getegid() => int
-	"getenv": &tengo.UserFunction{
+	"getenv": &xgo.UserFunction{
 		Name:  "getenv",
 		Value: FuncASRS(os.Getenv),
 	}, // getenv(s string) => string
-	"geteuid": &tengo.UserFunction{
+	"geteuid": &xgo.UserFunction{
 		Name:  "geteuid",
 		Value: FuncARI(os.Geteuid),
 	}, // geteuid() => int
-	"getgid": &tengo.UserFunction{
+	"getgid": &xgo.UserFunction{
 		Name:  "getgid",
 		Value: FuncARI(os.Getgid),
 	}, // getgid() => int
-	"getgroups": &tengo.UserFunction{
+	"getgroups": &xgo.UserFunction{
 		Name:  "getgroups",
 		Value: FuncARIsE(os.Getgroups),
 	}, // getgroups() => array(string)/error
-	"getpagesize": &tengo.UserFunction{
+	"getpagesize": &xgo.UserFunction{
 		Name:  "getpagesize",
 		Value: FuncARI(os.Getpagesize),
 	}, // getpagesize() => int
-	"getpid": &tengo.UserFunction{
+	"getpid": &xgo.UserFunction{
 		Name:  "getpid",
 		Value: FuncARI(os.Getpid),
 	}, // getpid() => int
-	"getppid": &tengo.UserFunction{
+	"getppid": &xgo.UserFunction{
 		Name:  "getppid",
 		Value: FuncARI(os.Getppid),
 	}, // getppid() => int
-	"getuid": &tengo.UserFunction{
+	"getuid": &xgo.UserFunction{
 		Name:  "getuid",
 		Value: FuncARI(os.Getuid),
 	}, // getuid() => int
-	"getwd": &tengo.UserFunction{
+	"getwd": &xgo.UserFunction{
 		Name:  "getwd",
 		Value: FuncARSE(os.Getwd),
 	}, // getwd() => string/error
-	"hostname": &tengo.UserFunction{
+	"hostname": &xgo.UserFunction{
 		Name:  "hostname",
 		Value: FuncARSE(os.Hostname),
 	}, // hostname() => string/error
-	"lchown": &tengo.UserFunction{
+	"lchown": &xgo.UserFunction{
 		Name:  "lchown",
 		Value: FuncASIIRE(os.Lchown),
 	}, // lchown(name string, uid int, gid int) => error
-	"link": &tengo.UserFunction{
+	"link": &xgo.UserFunction{
 		Name:  "link",
 		Value: FuncASSRE(os.Link),
 	}, // link(oldname string, newname string) => error
-	"lookup_env": &tengo.UserFunction{
+	"lookup_env": &xgo.UserFunction{
 		Name:  "lookup_env",
 		Value: osLookupEnv,
 	}, // lookup_env(key string) => string/false
 	"mkdir":     osFuncASFmRE("mkdir", os.Mkdir),        // mkdir(name string, perm int) => error
 	"mkdir_all": osFuncASFmRE("mkdir_all", os.MkdirAll), // mkdir_all(name string, perm int) => error
-	"readlink": &tengo.UserFunction{
+	"readlink": &xgo.UserFunction{
 		Name:  "readlink",
 		Value: FuncASRSE(os.Readlink),
 	}, // readlink(name string) => string/error
-	"remove": &tengo.UserFunction{
+	"remove": &xgo.UserFunction{
 		Name:  "remove",
 		Value: FuncASRE(os.Remove),
 	}, // remove(name string) => error
-	"remove_all": &tengo.UserFunction{
+	"remove_all": &xgo.UserFunction{
 		Name:  "remove_all",
 		Value: FuncASRE(os.RemoveAll),
 	}, // remove_all(name string) => error
-	"rename": &tengo.UserFunction{
+	"rename": &xgo.UserFunction{
 		Name:  "rename",
 		Value: FuncASSRE(os.Rename),
 	}, // rename(oldpath string, newpath string) => error
-	"setenv": &tengo.UserFunction{
+	"setenv": &xgo.UserFunction{
 		Name:  "setenv",
 		Value: FuncASSRE(os.Setenv),
 	}, // setenv(key string, value string) => error
-	"symlink": &tengo.UserFunction{
+	"symlink": &xgo.UserFunction{
 		Name:  "symlink",
 		Value: FuncASSRE(os.Symlink),
 	}, // symlink(oldname string newname string) => error
-	"temp_dir": &tengo.UserFunction{
+	"temp_dir": &xgo.UserFunction{
 		Name:  "temp_dir",
 		Value: FuncARS(os.TempDir),
 	}, // temp_dir() => string
-	"truncate": &tengo.UserFunction{
+	"truncate": &xgo.UserFunction{
 		Name:  "truncate",
 		Value: FuncASI64RE(os.Truncate),
 	}, // truncate(name string, size int) => error
-	"unsetenv": &tengo.UserFunction{
+	"unsetenv": &xgo.UserFunction{
 		Name:  "unsetenv",
 		Value: FuncASRE(os.Unsetenv),
 	}, // unsetenv(key string) => error
-	"create": &tengo.UserFunction{
+	"create": &xgo.UserFunction{
 		Name:  "create",
 		Value: osCreate,
 	}, // create(name string) => imap(file)/error
-	"open": &tengo.UserFunction{
+	"open": &xgo.UserFunction{
 		Name:  "open",
 		Value: osOpen,
 	}, // open(name string) => imap(file)/error
-	"open_file": &tengo.UserFunction{
+	"open_file": &xgo.UserFunction{
 		Name:  "open_file",
 		Value: osOpenFile,
 	}, // open_file(name string, flag int, perm int) => imap(file)/error
-	"find_process": &tengo.UserFunction{
+	"find_process": &xgo.UserFunction{
 		Name:  "find_process",
 		Value: osFindProcess,
 	}, // find_process(pid int) => imap(process)/error
-	"start_process": &tengo.UserFunction{
+	"start_process": &xgo.UserFunction{
 		Name:  "start_process",
 		Value: osStartProcess,
 	}, // start_process(name string, argv array(string), dir string, env array(string)) => imap(process)/error
-	"exec_look_path": &tengo.UserFunction{
+	"exec_look_path": &xgo.UserFunction{
 		Name:  "exec_look_path",
 		Value: FuncASRSE(exec.LookPath),
 	}, // exec_look_path(file) => string/error
-	"exec": &tengo.UserFunction{
+	"exec": &xgo.UserFunction{
 		Name:  "exec",
 		Value: osExec,
 	}, // exec(name, args...) => command
-	"stat": &tengo.UserFunction{
+	"stat": &xgo.UserFunction{
 		Name:  "stat",
 		Value: osStat,
 	}, // stat(name) => imap(fileinfo)/error
-	"read_file": &tengo.UserFunction{
+	"read_file": &xgo.UserFunction{
 		Name:  "read_file",
 		Value: osReadFile,
 	}, // readfile(name) => array(byte)/error
 }
 
-func osReadFile(args ...tengo.Object) (ret tengo.Object, err error) {
+func osReadFile(args ...xgo.Object) (ret xgo.Object, err error) {
 	if len(args) != 1 {
-		return nil, tengo.ErrWrongNumArguments
+		return nil, xgo.ErrWrongNumArguments
 	}
-	fname, ok := tengo.ToString(args[0])
+	fname, ok := xgo.ToString(args[0])
 	if !ok {
-		return nil, tengo.ErrInvalidArgumentType{
+		return nil, xgo.ErrInvalidArgumentType{
 			Name:     "first",
 			Expected: "string(compatible)",
 			Found:    args[0].TypeName(),
@@ -219,19 +219,19 @@ func osReadFile(args ...tengo.Object) (ret tengo.Object, err error) {
 	if err != nil {
 		return wrapError(err), nil
 	}
-	if len(bytes) > tengo.MaxBytesLen {
-		return nil, tengo.ErrBytesLimit
+	if len(bytes) > xgo.MaxBytesLen {
+		return nil, xgo.ErrBytesLimit
 	}
-	return &tengo.Bytes{Value: bytes}, nil
+	return &xgo.Bytes{Value: bytes}, nil
 }
 
-func osStat(args ...tengo.Object) (ret tengo.Object, err error) {
+func osStat(args ...xgo.Object) (ret xgo.Object, err error) {
 	if len(args) != 1 {
-		return nil, tengo.ErrWrongNumArguments
+		return nil, xgo.ErrWrongNumArguments
 	}
-	fname, ok := tengo.ToString(args[0])
+	fname, ok := xgo.ToString(args[0])
 	if !ok {
-		return nil, tengo.ErrInvalidArgumentType{
+		return nil, xgo.ErrInvalidArgumentType{
 			Name:     "first",
 			Expected: "string(compatible)",
 			Found:    args[0].TypeName(),
@@ -241,29 +241,29 @@ func osStat(args ...tengo.Object) (ret tengo.Object, err error) {
 	if err != nil {
 		return wrapError(err), nil
 	}
-	fstat := &tengo.ImmutableMap{
-		Value: map[string]tengo.Object{
-			"name":  &tengo.String{Value: stat.Name()},
-			"mtime": &tengo.Time{Value: stat.ModTime()},
-			"size":  &tengo.Int{Value: stat.Size()},
-			"mode":  &tengo.Int{Value: int64(stat.Mode())},
+	fstat := &xgo.ImmutableMap{
+		Value: map[string]xgo.Object{
+			"name":  &xgo.String{Value: stat.Name()},
+			"mtime": &xgo.Time{Value: stat.ModTime()},
+			"size":  &xgo.Int{Value: stat.Size()},
+			"mode":  &xgo.Int{Value: int64(stat.Mode())},
 		},
 	}
 	if stat.IsDir() {
-		fstat.Value["directory"] = tengo.TrueValue
+		fstat.Value["directory"] = xgo.TrueValue
 	} else {
-		fstat.Value["directory"] = tengo.FalseValue
+		fstat.Value["directory"] = xgo.FalseValue
 	}
 	return fstat, nil
 }
 
-func osCreate(args ...tengo.Object) (tengo.Object, error) {
+func osCreate(args ...xgo.Object) (xgo.Object, error) {
 	if len(args) != 1 {
-		return nil, tengo.ErrWrongNumArguments
+		return nil, xgo.ErrWrongNumArguments
 	}
-	s1, ok := tengo.ToString(args[0])
+	s1, ok := xgo.ToString(args[0])
 	if !ok {
-		return nil, tengo.ErrInvalidArgumentType{
+		return nil, xgo.ErrInvalidArgumentType{
 			Name:     "first",
 			Expected: "string(compatible)",
 			Found:    args[0].TypeName(),
@@ -276,13 +276,13 @@ func osCreate(args ...tengo.Object) (tengo.Object, error) {
 	return makeOSFile(res), nil
 }
 
-func osOpen(args ...tengo.Object) (tengo.Object, error) {
+func osOpen(args ...xgo.Object) (xgo.Object, error) {
 	if len(args) != 1 {
-		return nil, tengo.ErrWrongNumArguments
+		return nil, xgo.ErrWrongNumArguments
 	}
-	s1, ok := tengo.ToString(args[0])
+	s1, ok := xgo.ToString(args[0])
 	if !ok {
-		return nil, tengo.ErrInvalidArgumentType{
+		return nil, xgo.ErrInvalidArgumentType{
 			Name:     "first",
 			Expected: "string(compatible)",
 			Found:    args[0].TypeName(),
@@ -295,29 +295,29 @@ func osOpen(args ...tengo.Object) (tengo.Object, error) {
 	return makeOSFile(res), nil
 }
 
-func osOpenFile(args ...tengo.Object) (tengo.Object, error) {
+func osOpenFile(args ...xgo.Object) (xgo.Object, error) {
 	if len(args) != 3 {
-		return nil, tengo.ErrWrongNumArguments
+		return nil, xgo.ErrWrongNumArguments
 	}
-	s1, ok := tengo.ToString(args[0])
+	s1, ok := xgo.ToString(args[0])
 	if !ok {
-		return nil, tengo.ErrInvalidArgumentType{
+		return nil, xgo.ErrInvalidArgumentType{
 			Name:     "first",
 			Expected: "string(compatible)",
 			Found:    args[0].TypeName(),
 		}
 	}
-	i2, ok := tengo.ToInt(args[1])
+	i2, ok := xgo.ToInt(args[1])
 	if !ok {
-		return nil, tengo.ErrInvalidArgumentType{
+		return nil, xgo.ErrInvalidArgumentType{
 			Name:     "second",
 			Expected: "int(compatible)",
 			Found:    args[1].TypeName(),
 		}
 	}
-	i3, ok := tengo.ToInt(args[2])
+	i3, ok := xgo.ToInt(args[2])
 	if !ok {
-		return nil, tengo.ErrInvalidArgumentType{
+		return nil, xgo.ErrInvalidArgumentType{
 			Name:     "third",
 			Expected: "int(compatible)",
 			Found:    args[2].TypeName(),
@@ -330,16 +330,16 @@ func osOpenFile(args ...tengo.Object) (tengo.Object, error) {
 	return makeOSFile(res), nil
 }
 
-func osArgs(args ...tengo.Object) (tengo.Object, error) {
+func osArgs(args ...xgo.Object) (xgo.Object, error) {
 	if len(args) != 0 {
-		return nil, tengo.ErrWrongNumArguments
+		return nil, xgo.ErrWrongNumArguments
 	}
-	arr := &tengo.Array{}
+	arr := &xgo.Array{}
 	for _, osArg := range os.Args {
-		if len(osArg) > tengo.MaxStringLen {
-			return nil, tengo.ErrStringLimit
+		if len(osArg) > xgo.MaxStringLen {
+			return nil, xgo.ErrStringLimit
 		}
-		arr.Value = append(arr.Value, &tengo.String{Value: osArg})
+		arr.Value = append(arr.Value, &xgo.String{Value: osArg})
 	}
 	return arr, nil
 }
@@ -347,24 +347,24 @@ func osArgs(args ...tengo.Object) (tengo.Object, error) {
 func osFuncASFmRE(
 	name string,
 	fn func(string, os.FileMode) error,
-) *tengo.UserFunction {
-	return &tengo.UserFunction{
+) *xgo.UserFunction {
+	return &xgo.UserFunction{
 		Name: name,
-		Value: func(args ...tengo.Object) (tengo.Object, error) {
+		Value: func(args ...xgo.Object) (xgo.Object, error) {
 			if len(args) != 2 {
-				return nil, tengo.ErrWrongNumArguments
+				return nil, xgo.ErrWrongNumArguments
 			}
-			s1, ok := tengo.ToString(args[0])
+			s1, ok := xgo.ToString(args[0])
 			if !ok {
-				return nil, tengo.ErrInvalidArgumentType{
+				return nil, xgo.ErrInvalidArgumentType{
 					Name:     "first",
 					Expected: "string(compatible)",
 					Found:    args[0].TypeName(),
 				}
 			}
-			i2, ok := tengo.ToInt64(args[1])
+			i2, ok := xgo.ToInt64(args[1])
 			if !ok {
-				return nil, tengo.ErrInvalidArgumentType{
+				return nil, xgo.ErrInvalidArgumentType{
 					Name:     "second",
 					Expected: "int(compatible)",
 					Found:    args[1].TypeName(),
@@ -375,13 +375,13 @@ func osFuncASFmRE(
 	}
 }
 
-func osLookupEnv(args ...tengo.Object) (tengo.Object, error) {
+func osLookupEnv(args ...xgo.Object) (xgo.Object, error) {
 	if len(args) != 1 {
-		return nil, tengo.ErrWrongNumArguments
+		return nil, xgo.ErrWrongNumArguments
 	}
-	s1, ok := tengo.ToString(args[0])
+	s1, ok := xgo.ToString(args[0])
 	if !ok {
-		return nil, tengo.ErrInvalidArgumentType{
+		return nil, xgo.ErrInvalidArgumentType{
 			Name:     "first",
 			Expected: "string(compatible)",
 			Found:    args[0].TypeName(),
@@ -389,21 +389,21 @@ func osLookupEnv(args ...tengo.Object) (tengo.Object, error) {
 	}
 	res, ok := os.LookupEnv(s1)
 	if !ok {
-		return tengo.FalseValue, nil
+		return xgo.FalseValue, nil
 	}
-	if len(res) > tengo.MaxStringLen {
-		return nil, tengo.ErrStringLimit
+	if len(res) > xgo.MaxStringLen {
+		return nil, xgo.ErrStringLimit
 	}
-	return &tengo.String{Value: res}, nil
+	return &xgo.String{Value: res}, nil
 }
 
-func osExpandEnv(args ...tengo.Object) (tengo.Object, error) {
+func osExpandEnv(args ...xgo.Object) (xgo.Object, error) {
 	if len(args) != 1 {
-		return nil, tengo.ErrWrongNumArguments
+		return nil, xgo.ErrWrongNumArguments
 	}
-	s1, ok := tengo.ToString(args[0])
+	s1, ok := xgo.ToString(args[0])
 	if !ok {
-		return nil, tengo.ErrInvalidArgumentType{
+		return nil, xgo.ErrInvalidArgumentType{
 			Name:     "first",
 			Expected: "string(compatible)",
 			Found:    args[0].TypeName(),
@@ -420,25 +420,25 @@ func osExpandEnv(args ...tengo.Object) (tengo.Object, error) {
 		// this does not count the other texts that are not being replaced
 		// but the code checks the final length at the end
 		vlen += len(v)
-		if vlen > tengo.MaxStringLen {
+		if vlen > xgo.MaxStringLen {
 			failed = true
 			return ""
 		}
 		return v
 	})
-	if failed || len(s) > tengo.MaxStringLen {
-		return nil, tengo.ErrStringLimit
+	if failed || len(s) > xgo.MaxStringLen {
+		return nil, xgo.ErrStringLimit
 	}
-	return &tengo.String{Value: s}, nil
+	return &xgo.String{Value: s}, nil
 }
 
-func osExec(args ...tengo.Object) (tengo.Object, error) {
+func osExec(args ...xgo.Object) (xgo.Object, error) {
 	if len(args) == 0 {
-		return nil, tengo.ErrWrongNumArguments
+		return nil, xgo.ErrWrongNumArguments
 	}
-	name, ok := tengo.ToString(args[0])
+	name, ok := xgo.ToString(args[0])
 	if !ok {
-		return nil, tengo.ErrInvalidArgumentType{
+		return nil, xgo.ErrInvalidArgumentType{
 			Name:     "first",
 			Expected: "string(compatible)",
 			Found:    args[0].TypeName(),
@@ -446,9 +446,9 @@ func osExec(args ...tengo.Object) (tengo.Object, error) {
 	}
 	var execArgs []string
 	for idx, arg := range args[1:] {
-		execArg, ok := tengo.ToString(arg)
+		execArg, ok := xgo.ToString(arg)
 		if !ok {
-			return nil, tengo.ErrInvalidArgumentType{
+			return nil, xgo.ErrInvalidArgumentType{
 				Name:     fmt.Sprintf("args[%d]", idx),
 				Expected: "string(compatible)",
 				Found:    args[1+idx].TypeName(),
@@ -459,13 +459,13 @@ func osExec(args ...tengo.Object) (tengo.Object, error) {
 	return makeOSExecCommand(exec.Command(name, execArgs...)), nil
 }
 
-func osFindProcess(args ...tengo.Object) (tengo.Object, error) {
+func osFindProcess(args ...xgo.Object) (xgo.Object, error) {
 	if len(args) != 1 {
-		return nil, tengo.ErrWrongNumArguments
+		return nil, xgo.ErrWrongNumArguments
 	}
-	i1, ok := tengo.ToInt(args[0])
+	i1, ok := xgo.ToInt(args[0])
 	if !ok {
-		return nil, tengo.ErrInvalidArgumentType{
+		return nil, xgo.ErrInvalidArgumentType{
 			Name:     "first",
 			Expected: "int(compatible)",
 			Found:    args[0].TypeName(),
@@ -478,13 +478,13 @@ func osFindProcess(args ...tengo.Object) (tengo.Object, error) {
 	return makeOSProcess(proc), nil
 }
 
-func osStartProcess(args ...tengo.Object) (tengo.Object, error) {
+func osStartProcess(args ...xgo.Object) (xgo.Object, error) {
 	if len(args) != 4 {
-		return nil, tengo.ErrWrongNumArguments
+		return nil, xgo.ErrWrongNumArguments
 	}
-	name, ok := tengo.ToString(args[0])
+	name, ok := xgo.ToString(args[0])
 	if !ok {
-		return nil, tengo.ErrInvalidArgumentType{
+		return nil, xgo.ErrInvalidArgumentType{
 			Name:     "first",
 			Expected: "string(compatible)",
 			Found:    args[0].TypeName(),
@@ -493,27 +493,27 @@ func osStartProcess(args ...tengo.Object) (tengo.Object, error) {
 	var argv []string
 	var err error
 	switch arg1 := args[1].(type) {
-	case *tengo.Array:
+	case *xgo.Array:
 		argv, err = stringArray(arg1.Value, "second")
 		if err != nil {
 			return nil, err
 		}
-	case *tengo.ImmutableArray:
+	case *xgo.ImmutableArray:
 		argv, err = stringArray(arg1.Value, "second")
 		if err != nil {
 			return nil, err
 		}
 	default:
-		return nil, tengo.ErrInvalidArgumentType{
+		return nil, xgo.ErrInvalidArgumentType{
 			Name:     "second",
 			Expected: "array",
 			Found:    arg1.TypeName(),
 		}
 	}
 
-	dir, ok := tengo.ToString(args[2])
+	dir, ok := xgo.ToString(args[2])
 	if !ok {
-		return nil, tengo.ErrInvalidArgumentType{
+		return nil, xgo.ErrInvalidArgumentType{
 			Name:     "third",
 			Expected: "string(compatible)",
 			Found:    args[2].TypeName(),
@@ -522,18 +522,18 @@ func osStartProcess(args ...tengo.Object) (tengo.Object, error) {
 
 	var env []string
 	switch arg3 := args[3].(type) {
-	case *tengo.Array:
+	case *xgo.Array:
 		env, err = stringArray(arg3.Value, "fourth")
 		if err != nil {
 			return nil, err
 		}
-	case *tengo.ImmutableArray:
+	case *xgo.ImmutableArray:
 		env, err = stringArray(arg3.Value, "fourth")
 		if err != nil {
 			return nil, err
 		}
 	default:
-		return nil, tengo.ErrInvalidArgumentType{
+		return nil, xgo.ErrInvalidArgumentType{
 			Name:     "fourth",
 			Expected: "array",
 			Found:    arg3.TypeName(),
@@ -550,12 +550,12 @@ func osStartProcess(args ...tengo.Object) (tengo.Object, error) {
 	return makeOSProcess(proc), nil
 }
 
-func stringArray(arr []tengo.Object, argName string) ([]string, error) {
+func stringArray(arr []xgo.Object, argName string) ([]string, error) {
 	var sarr []string
 	for idx, elem := range arr {
-		str, ok := elem.(*tengo.String)
+		str, ok := elem.(*xgo.String)
 		if !ok {
-			return nil, tengo.ErrInvalidArgumentType{
+			return nil, xgo.ErrInvalidArgumentType{
 				Name:     fmt.Sprintf("%s[%d]", argName, idx),
 				Expected: "string",
 				Found:    elem.TypeName(),

stdlib/os_exec.go

@@ -3,113 +3,113 @@ package stdlib
 import (
 	"os/exec"
 
-	"github.com/d5/tengo/v2"
+	"surdeus.su/core/xgo/v2"
 )
 
-func makeOSExecCommand(cmd *exec.Cmd) *tengo.ImmutableMap {
-	return &tengo.ImmutableMap{
-		Value: map[string]tengo.Object{
+func makeOSExecCommand(cmd *exec.Cmd) *xgo.ImmutableMap {
+	return &xgo.ImmutableMap{
+		Value: map[string]xgo.Object{
 			// combined_output() => bytes/error
-			"combined_output": &tengo.UserFunction{
+			"combined_output": &xgo.UserFunction{
 				Name:  "combined_output",
 				Value: FuncARYE(cmd.CombinedOutput),
 			},
 			// output() => bytes/error
-			"output": &tengo.UserFunction{
+			"output": &xgo.UserFunction{
 				Name:  "output",
 				Value: FuncARYE(cmd.Output),
 			}, //
 			// run() => error
-			"run": &tengo.UserFunction{
+			"run": &xgo.UserFunction{
 				Name:  "run",
 				Value: FuncARE(cmd.Run),
 			}, //
 			// start() => error
-			"start": &tengo.UserFunction{
+			"start": &xgo.UserFunction{
 				Name:  "start",
 				Value: FuncARE(cmd.Start),
 			}, //
 			// wait() => error
-			"wait": &tengo.UserFunction{
+			"wait": &xgo.UserFunction{
 				Name:  "wait",
 				Value: FuncARE(cmd.Wait),
 			}, //
 			// set_path(path string)
-			"set_path": &tengo.UserFunction{
+			"set_path": &xgo.UserFunction{
 				Name: "set_path",
-				Value: func(args ...tengo.Object) (tengo.Object, error) {
+				Value: func(args ...xgo.Object) (xgo.Object, error) {
 					if len(args) != 1 {
-						return nil, tengo.ErrWrongNumArguments
+						return nil, xgo.ErrWrongNumArguments
 					}
-					s1, ok := tengo.ToString(args[0])
+					s1, ok := xgo.ToString(args[0])
 					if !ok {
-						return nil, tengo.ErrInvalidArgumentType{
+						return nil, xgo.ErrInvalidArgumentType{
 							Name:     "first",
 							Expected: "string(compatible)",
 							Found:    args[0].TypeName(),
 						}
 					}
 					cmd.Path = s1
-					return tengo.UndefinedValue, nil
+					return xgo.UndefinedValue, nil
 				},
 			},
 			// set_dir(dir string)
-			"set_dir": &tengo.UserFunction{
+			"set_dir": &xgo.UserFunction{
 				Name: "set_dir",
-				Value: func(args ...tengo.Object) (tengo.Object, error) {
+				Value: func(args ...xgo.Object) (xgo.Object, error) {
 					if len(args) != 1 {
-						return nil, tengo.ErrWrongNumArguments
+						return nil, xgo.ErrWrongNumArguments
 					}
-					s1, ok := tengo.ToString(args[0])
+					s1, ok := xgo.ToString(args[0])
 					if !ok {
-						return nil, tengo.ErrInvalidArgumentType{
+						return nil, xgo.ErrInvalidArgumentType{
 							Name:     "first",
 							Expected: "string(compatible)",
 							Found:    args[0].TypeName(),
 						}
 					}
 					cmd.Dir = s1
-					return tengo.UndefinedValue, nil
+					return xgo.UndefinedValue, nil
 				},
 			},
 			// set_env(env array(string))
-			"set_env": &tengo.UserFunction{
+			"set_env": &xgo.UserFunction{
 				Name: "set_env",
-				Value: func(args ...tengo.Object) (tengo.Object, error) {
+				Value: func(args ...xgo.Object) (xgo.Object, error) {
 					if len(args) != 1 {
-						return nil, tengo.ErrWrongNumArguments
+						return nil, xgo.ErrWrongNumArguments
 					}
 
 					var env []string
 					var err error
 					switch arg0 := args[0].(type) {
-					case *tengo.Array:
+					case *xgo.Array:
 						env, err = stringArray(arg0.Value, "first")
 						if err != nil {
 							return nil, err
 						}
-					case *tengo.ImmutableArray:
+					case *xgo.ImmutableArray:
 						env, err = stringArray(arg0.Value, "first")
 						if err != nil {
 							return nil, err
 						}
 					default:
-						return nil, tengo.ErrInvalidArgumentType{
+						return nil, xgo.ErrInvalidArgumentType{
 							Name:     "first",
 							Expected: "array",
 							Found:    arg0.TypeName(),
 						}
 					}
 					cmd.Env = env
-					return tengo.UndefinedValue, nil
+					return xgo.UndefinedValue, nil
 				},
 			},
 			// process() => imap(process)
-			"process": &tengo.UserFunction{
+			"process": &xgo.UserFunction{
 				Name: "process",
-				Value: func(args ...tengo.Object) (tengo.Object, error) {
+				Value: func(args ...xgo.Object) (xgo.Object, error) {
 					if len(args) != 0 {
-						return nil, tengo.ErrWrongNumArguments
+						return nil, xgo.ErrWrongNumArguments
 					}
 					return makeOSProcess(cmd.Process), nil
 				},

stdlib/os_file.go

@@ -3,67 +3,67 @@ package stdlib
 import (
 	"os"
 
-	"github.com/d5/tengo/v2"
+	"surdeus.su/core/xgo/v2"
 )
 
-func makeOSFile(file *os.File) *tengo.ImmutableMap {
-	return &tengo.ImmutableMap{
-		Value: map[string]tengo.Object{
+func makeOSFile(file *os.File) *xgo.ImmutableMap {
+	return &xgo.ImmutableMap{
+		Value: map[string]xgo.Object{
 			// chdir() => true/error
-			"chdir": &tengo.UserFunction{
+			"chdir": &xgo.UserFunction{
 				Name:  "chdir",
 				Value: FuncARE(file.Chdir),
 			}, //
 			// chown(uid int, gid int) => true/error
-			"chown": &tengo.UserFunction{
+			"chown": &xgo.UserFunction{
 				Name:  "chown",
 				Value: FuncAIIRE(file.Chown),
 			}, //
 			// close() => error
-			"close": &tengo.UserFunction{
+			"close": &xgo.UserFunction{
 				Name:  "close",
 				Value: FuncARE(file.Close),
 			}, //
 			// name() => string
-			"name": &tengo.UserFunction{
+			"name": &xgo.UserFunction{
 				Name:  "name",
 				Value: FuncARS(file.Name),
 			}, //
 			// readdirnames(n int) => array(string)/error
-			"readdirnames": &tengo.UserFunction{
+			"readdirnames": &xgo.UserFunction{
 				Name:  "readdirnames",
 				Value: FuncAIRSsE(file.Readdirnames),
 			}, //
 			// sync() => error
-			"sync": &tengo.UserFunction{
+			"sync": &xgo.UserFunction{
 				Name:  "sync",
 				Value: FuncARE(file.Sync),
 			}, //
 			// write(bytes) => int/error
-			"write": &tengo.UserFunction{
+			"write": &xgo.UserFunction{
 				Name:  "write",
 				Value: FuncAYRIE(file.Write),
 			}, //
 			// write(string) => int/error
-			"write_string": &tengo.UserFunction{
+			"write_string": &xgo.UserFunction{
 				Name:  "write_string",
 				Value: FuncASRIE(file.WriteString),
 			}, //
 			// read(bytes) => int/error
-			"read": &tengo.UserFunction{
+			"read": &xgo.UserFunction{
 				Name:  "read",
 				Value: FuncAYRIE(file.Read),
 			}, //
 			// chmod(mode int) => error
-			"chmod": &tengo.UserFunction{
+			"chmod": &xgo.UserFunction{
 				Name: "chmod",
-				Value: func(args ...tengo.Object) (tengo.Object, error) {
+				Value: func(args ...xgo.Object) (xgo.Object, error) {
 					if len(args) != 1 {
-						return nil, tengo.ErrWrongNumArguments
+						return nil, xgo.ErrWrongNumArguments
 					}
-					i1, ok := tengo.ToInt64(args[0])
+					i1, ok := xgo.ToInt64(args[0])
 					if !ok {
-						return nil, tengo.ErrInvalidArgumentType{
+						return nil, xgo.ErrInvalidArgumentType{
 							Name:     "first",
 							Expected: "int(compatible)",
 							Found:    args[0].TypeName(),
@@ -73,23 +73,23 @@ func makeOSFile(file *os.File) *tengo.ImmutableMap {
 				},
 			},
 			// seek(offset int, whence int) => int/error
-			"seek": &tengo.UserFunction{
+			"seek": &xgo.UserFunction{
 				Name: "seek",
-				Value: func(args ...tengo.Object) (tengo.Object, error) {
+				Value: func(args ...xgo.Object) (xgo.Object, error) {
 					if len(args) != 2 {
-						return nil, tengo.ErrWrongNumArguments
+						return nil, xgo.ErrWrongNumArguments
 					}
-					i1, ok := tengo.ToInt64(args[0])
+					i1, ok := xgo.ToInt64(args[0])
 					if !ok {
-						return nil, tengo.ErrInvalidArgumentType{
+						return nil, xgo.ErrInvalidArgumentType{
 							Name:     "first",
 							Expected: "int(compatible)",
 							Found:    args[0].TypeName(),
 						}
 					}
-					i2, ok := tengo.ToInt(args[1])
+					i2, ok := xgo.ToInt(args[1])
 					if !ok {
-						return nil, tengo.ErrInvalidArgumentType{
+						return nil, xgo.ErrInvalidArgumentType{
 							Name:     "second",
 							Expected: "int(compatible)",
 							Found:    args[1].TypeName(),
@@ -99,17 +99,17 @@ func makeOSFile(file *os.File) *tengo.ImmutableMap {
 					if err != nil {
 						return wrapError(err), nil
 					}
-					return &tengo.Int{Value: res}, nil
+					return &xgo.Int{Value: res}, nil
 				},
 			},
 			// stat() => imap(fileinfo)/error
-			"stat": &tengo.UserFunction{
+			"stat": &xgo.UserFunction{
 				Name: "stat",
-				Value: func(args ...tengo.Object) (tengo.Object, error) {
+				Value: func(args ...xgo.Object) (xgo.Object, error) {
 					if len(args) != 0 {
-						return nil, tengo.ErrWrongNumArguments
+						return nil, xgo.ErrWrongNumArguments
 					}
-					return osStat(&tengo.String{Value: file.Name()})
+					return osStat(&xgo.String{Value: file.Name()})
 				},
 			},
 		},

stdlib/os_process.go

@@ -4,25 +4,25 @@ import (
 	"os"
 	"syscall"
 
-	"github.com/d5/tengo/v2"
+	"surdeus.su/core/xgo/v2"
 )
 
-func makeOSProcessState(state *os.ProcessState) *tengo.ImmutableMap {
-	return &tengo.ImmutableMap{
-		Value: map[string]tengo.Object{
-			"exited": &tengo.UserFunction{
+func makeOSProcessState(state *os.ProcessState) *xgo.ImmutableMap {
+	return &xgo.ImmutableMap{
+		Value: map[string]xgo.Object{
+			"exited": &xgo.UserFunction{
 				Name:  "exited",
 				Value: FuncARB(state.Exited),
 			},
-			"pid": &tengo.UserFunction{
+			"pid": &xgo.UserFunction{
 				Name:  "pid",
 				Value: FuncARI(state.Pid),
 			},
-			"string": &tengo.UserFunction{
+			"string": &xgo.UserFunction{
 				Name:  "string",
 				Value: FuncARS(state.String),
 			},
-			"success": &tengo.UserFunction{
+			"success": &xgo.UserFunction{
 				Name:  "success",
 				Value: FuncARB(state.Success),
 			},
@@ -30,26 +30,26 @@ func makeOSProcessState(state *os.ProcessState) *tengo.ImmutableMap {
 	}
 }
 
-func makeOSProcess(proc *os.Process) *tengo.ImmutableMap {
-	return &tengo.ImmutableMap{
-		Value: map[string]tengo.Object{
-			"kill": &tengo.UserFunction{
+func makeOSProcess(proc *os.Process) *xgo.ImmutableMap {
+	return &xgo.ImmutableMap{
+		Value: map[string]xgo.Object{
+			"kill": &xgo.UserFunction{
 				Name:  "kill",
 				Value: FuncARE(proc.Kill),
 			},
-			"release": &tengo.UserFunction{
+			"release": &xgo.UserFunction{
 				Name:  "release",
 				Value: FuncARE(proc.Release),
 			},
-			"signal": &tengo.UserFunction{
+			"signal": &xgo.UserFunction{
 				Name: "signal",
-				Value: func(args ...tengo.Object) (tengo.Object, error) {
+				Value: func(args ...xgo.Object) (xgo.Object, error) {
 					if len(args) != 1 {
-						return nil, tengo.ErrWrongNumArguments
+						return nil, xgo.ErrWrongNumArguments
 					}
-					i1, ok := tengo.ToInt64(args[0])
+					i1, ok := xgo.ToInt64(args[0])
 					if !ok {
-						return nil, tengo.ErrInvalidArgumentType{
+						return nil, xgo.ErrInvalidArgumentType{
 							Name:     "first",
 							Expected: "int(compatible)",
 							Found:    args[0].TypeName(),
@@ -58,11 +58,11 @@ func makeOSProcess(proc *os.Process) *tengo.ImmutableMap {
 					return wrapError(proc.Signal(syscall.Signal(i1))), nil
 				},
 			},
-			"wait": &tengo.UserFunction{
+			"wait": &xgo.UserFunction{
 				Name: "wait",
-				Value: func(args ...tengo.Object) (tengo.Object, error) {
+				Value: func(args ...xgo.Object) (xgo.Object, error) {
 					if len(args) != 0 {
-						return nil, tengo.ErrWrongNumArguments
+						return nil, xgo.ErrWrongNumArguments
 					}
 					state, err := proc.Wait()
 					if err != nil {

stdlib/os_test.go

@@ -5,8 +5,8 @@ import (
 	"os"
 	"testing"
 
-	"github.com/d5/tengo/v2"
-	"github.com/d5/tengo/v2/require"
+	"surdeus.su/core/xgo/v2"
+	"surdeus.su/core/xgo/v2/require"
 )
 
 func TestReadFile(t *testing.T) {
@@ -20,7 +20,7 @@ func TestReadFile(t *testing.T) {
 	_ = tf.Close()
 
 	module(t, "os").call("read_file", tf.Name()).
-		expect(&tengo.Bytes{Value: content})
+		expect(&xgo.Bytes{Value: content})
 }
 
 func TestReadFileArgs(t *testing.T) {
@@ -46,13 +46,13 @@ func TestFileStatFile(t *testing.T) {
 		return
 	}
 
-	module(t, "os").call("stat", tf.Name()).expect(&tengo.ImmutableMap{
-		Value: map[string]tengo.Object{
-			"name":      &tengo.String{Value: stat.Name()},
-			"mtime":     &tengo.Time{Value: stat.ModTime()},
-			"size":      &tengo.Int{Value: stat.Size()},
-			"mode":      &tengo.Int{Value: int64(stat.Mode())},
-			"directory": tengo.FalseValue,
+	module(t, "os").call("stat", tf.Name()).expect(&xgo.ImmutableMap{
+		Value: map[string]xgo.Object{
+			"name":      &xgo.String{Value: stat.Name()},
+			"mtime":     &xgo.Time{Value: stat.ModTime()},
+			"size":      &xgo.Int{Value: stat.Size()},
+			"mode":      &xgo.Int{Value: int64(stat.Mode())},
+			"directory": xgo.FalseValue,
 		},
 	})
 }
@@ -65,21 +65,21 @@ func TestFileStatDir(t *testing.T) {
 	stat, err := os.Stat(td)
 	require.NoError(t, err)
 
-	module(t, "os").call("stat", td).expect(&tengo.ImmutableMap{
-		Value: map[string]tengo.Object{
-			"name":      &tengo.String{Value: stat.Name()},
-			"mtime":     &tengo.Time{Value: stat.ModTime()},
-			"size":      &tengo.Int{Value: stat.Size()},
-			"mode":      &tengo.Int{Value: int64(stat.Mode())},
-			"directory": tengo.TrueValue,
+	module(t, "os").call("stat", td).expect(&xgo.ImmutableMap{
+		Value: map[string]xgo.Object{
+			"name":      &xgo.String{Value: stat.Name()},
+			"mtime":     &xgo.Time{Value: stat.ModTime()},
+			"size":      &xgo.Int{Value: stat.Size()},
+			"mode":      &xgo.Int{Value: int64(stat.Mode())},
+			"directory": xgo.TrueValue,
 		},
 	})
 }
 
 func TestOSExpandEnv(t *testing.T) {
-	curMaxStringLen := tengo.MaxStringLen
-	defer func() { tengo.MaxStringLen = curMaxStringLen }()
-	tengo.MaxStringLen = 12
+	curMaxStringLen := xgo.MaxStringLen
+	defer func() { xgo.MaxStringLen = curMaxStringLen }()
+	xgo.MaxStringLen = 12
 
 	_ = os.Setenv("TENGO", "FOO BAR")
 	module(t, "os").call("expand_env", "$TENGO").expect("FOO BAR")

stdlib/paths/main.go

@@ -0,0 +1,46 @@
+package paths
+
+import (
+	"surdeus.su/core/xgo/v2"
+	"path"
+)
+
+var Module = map[string]xgo.Object{
+	"base": &xgo.UserFunction{
+		Name:  "base",
+		Value: wrapOneArg(path.Base),
+	},
+	"ext": &xgo.UserFunction{
+		Name:  "ext",
+		Value: wrapOneArg(path.Ext),
+	},
+	"dir": &xgo.UserFunction{
+		Name:  "dir",
+		Value: wrapOneArg(path.Dir),
+	},
+	"clean": &xgo.UserFunction{
+		Name:  "clean",
+		Value: wrapOneArg(path.Clean),
+	},
+}
+
+func wrapOneArg(
+	fn func(string) string,
+) func(...xgo.Object) (xgo.Object, error) {
+	return func(args ...xgo.Object) (xgo.Object, error) {
+		if len(args) != 1 {
+			return nil, xgo.ErrWrongNumArguments
+		}
+		str, ok := xgo.ToString(args[0])
+		if !ok {
+			return nil, xgo.ErrInvalidArgumentType{
+				Name:     "first",
+				Expected: "string(compatible)",
+				Found:    args[0].TypeName(),
+			}
+		}
+		return &xgo.String{
+			Value: fn(str),
+		}, nil
+	}
+}

stdlib/rand.go

@@ -3,47 +3,47 @@ package stdlib
 import (
 	"math/rand"
 
-	"github.com/d5/tengo/v2"
+	"surdeus.su/core/xgo/v2"
 )
 
-var randModule = map[string]tengo.Object{
-	"int": &tengo.UserFunction{
+var randModule = map[string]xgo.Object{
+	"int": &xgo.UserFunction{
 		Name:  "int",
 		Value: FuncARI64(rand.Int63),
 	},
-	"float": &tengo.UserFunction{
+	"float": &xgo.UserFunction{
 		Name:  "float",
 		Value: FuncARF(rand.Float64),
 	},
-	"intn": &tengo.UserFunction{
+	"intn": &xgo.UserFunction{
 		Name:  "intn",
 		Value: FuncAI64RI64(rand.Int63n),
 	},
-	"exp_float": &tengo.UserFunction{
+	"exp_float": &xgo.UserFunction{
 		Name:  "exp_float",
 		Value: FuncARF(rand.ExpFloat64),
 	},
-	"norm_float": &tengo.UserFunction{
+	"norm_float": &xgo.UserFunction{
 		Name:  "norm_float",
 		Value: FuncARF(rand.NormFloat64),
 	},
-	"perm": &tengo.UserFunction{
+	"perm": &xgo.UserFunction{
 		Name:  "perm",
 		Value: FuncAIRIs(rand.Perm),
 	},
-	"seed": &tengo.UserFunction{
+	"seed": &xgo.UserFunction{
 		Name:  "seed",
 		Value: FuncAI64R(rand.Seed),
 	},
-	"read": &tengo.UserFunction{
+	"read": &xgo.UserFunction{
 		Name: "read",
-		Value: func(args ...tengo.Object) (ret tengo.Object, err error) {
+		Value: func(args ...xgo.Object) (ret xgo.Object, err error) {
 			if len(args) != 1 {
-				return nil, tengo.ErrWrongNumArguments
+				return nil, xgo.ErrWrongNumArguments
 			}
-			y1, ok := args[0].(*tengo.Bytes)
+			y1, ok := args[0].(*xgo.Bytes)
 			if !ok {
-				return nil, tengo.ErrInvalidArgumentType{
+				return nil, xgo.ErrInvalidArgumentType{
 					Name:     "first",
 					Expected: "bytes",
 					Found:    args[0].TypeName(),
@@ -54,18 +54,18 @@ var randModule = map[string]tengo.Object{
 				ret = wrapError(err)
 				return
 			}
-			return &tengo.Int{Value: int64(res)}, nil
+			return &xgo.Int{Value: int64(res)}, nil
 		},
 	},
-	"rand": &tengo.UserFunction{
+	"rand": &xgo.UserFunction{
 		Name: "rand",
-		Value: func(args ...tengo.Object) (tengo.Object, error) {
+		Value: func(args ...xgo.Object) (xgo.Object, error) {
 			if len(args) != 1 {
-				return nil, tengo.ErrWrongNumArguments
+				return nil, xgo.ErrWrongNumArguments
 			}
-			i1, ok := tengo.ToInt64(args[0])
+			i1, ok := xgo.ToInt64(args[0])
 			if !ok {
-				return nil, tengo.ErrInvalidArgumentType{
+				return nil, xgo.ErrInvalidArgumentType{
 					Name:     "first",
 					Expected: "int(compatible)",
 					Found:    args[0].TypeName(),
@@ -77,49 +77,49 @@ var randModule = map[string]tengo.Object{
 	},
 }
 
-func randRand(r *rand.Rand) *tengo.ImmutableMap {
-	return &tengo.ImmutableMap{
-		Value: map[string]tengo.Object{
-			"int": &tengo.UserFunction{
+func randRand(r *rand.Rand) *xgo.ImmutableMap {
+	return &xgo.ImmutableMap{
+		Value: map[string]xgo.Object{
+			"int": &xgo.UserFunction{
 				Name:  "int",
 				Value: FuncARI64(r.Int63),
 			},
-			"float": &tengo.UserFunction{
+			"float": &xgo.UserFunction{
 				Name:  "float",
 				Value: FuncARF(r.Float64),
 			},
-			"intn": &tengo.UserFunction{
+			"intn": &xgo.UserFunction{
 				Name:  "intn",
 				Value: FuncAI64RI64(r.Int63n),
 			},
-			"exp_float": &tengo.UserFunction{
+			"exp_float": &xgo.UserFunction{
 				Name:  "exp_float",
 				Value: FuncARF(r.ExpFloat64),
 			},
-			"norm_float": &tengo.UserFunction{
+			"norm_float": &xgo.UserFunction{
 				Name:  "norm_float",
 				Value: FuncARF(r.NormFloat64),
 			},
-			"perm": &tengo.UserFunction{
+			"perm": &xgo.UserFunction{
 				Name:  "perm",
 				Value: FuncAIRIs(r.Perm),
 			},
-			"seed": &tengo.UserFunction{
+			"seed": &xgo.UserFunction{
 				Name:  "seed",
 				Value: FuncAI64R(r.Seed),
 			},
-			"read": &tengo.UserFunction{
+			"read": &xgo.UserFunction{
 				Name: "read",
-				Value: func(args ...tengo.Object) (
-					ret tengo.Object,
+				Value: func(args ...xgo.Object) (
+					ret xgo.Object,
 					err error,
 				) {
 					if len(args) != 1 {
-						return nil, tengo.ErrWrongNumArguments
+						return nil, xgo.ErrWrongNumArguments
 					}
-					y1, ok := args[0].(*tengo.Bytes)
+					y1, ok := args[0].(*xgo.Bytes)
 					if !ok {
-						return nil, tengo.ErrInvalidArgumentType{
+						return nil, xgo.ErrInvalidArgumentType{
 							Name:     "first",
 							Expected: "bytes",
 							Found:    args[0].TypeName(),
@@ -130,7 +130,7 @@ func randRand(r *rand.Rand) *tengo.ImmutableMap {
 						ret = wrapError(err)
 						return
 					}
-					return &tengo.Int{Value: int64(res)}, nil
+					return &xgo.Int{Value: int64(res)}, nil
 				},
 			},
 		},

stdlib/rand_test.go

@@ -4,15 +4,15 @@ import (
 	"math/rand"
 	"testing"
 
-	"github.com/d5/tengo/v2"
-	"github.com/d5/tengo/v2/require"
+	"surdeus.su/core/xgo/v2"
+	"surdeus.su/core/xgo/v2/require"
 )
 
 func TestRand(t *testing.T) {
 	var seed int64 = 1234
 	r := rand.New(rand.NewSource(seed))
 
-	module(t, "rand").call("seed", seed).expect(tengo.UndefinedValue)
+	module(t, "rand").call("seed", seed).expect(xgo.UndefinedValue)
 	module(t, "rand").call("int").expect(r.Int63())
 	module(t, "rand").call("float").expect(r.Float64())
 	module(t, "rand").call("intn", 111).expect(r.Int63n(111))
@@ -21,7 +21,7 @@ func TestRand(t *testing.T) {
 	module(t, "rand").call("perm", 10).expect(r.Perm(10))
 
 	buf1 := make([]byte, 10)
-	buf2 := &tengo.Bytes{Value: make([]byte, 10)}
+	buf2 := &xgo.Bytes{Value: make([]byte, 10)}
 	n, _ := r.Read(buf1)
 	module(t, "rand").call("read", buf2).expect(n)
 	require.Equal(t, buf1, buf2.Value)
@@ -29,7 +29,7 @@ func TestRand(t *testing.T) {
 	seed = 9191
 	r = rand.New(rand.NewSource(seed))
 	randObj := module(t, "rand").call("rand", seed)
-	randObj.call("seed", seed).expect(tengo.UndefinedValue)
+	randObj.call("seed", seed).expect(xgo.UndefinedValue)
 	randObj.call("int").expect(r.Int63())
 	randObj.call("float").expect(r.Float64())
 	randObj.call("intn", 111).expect(r.Int63n(111))
@@ -38,7 +38,7 @@ func TestRand(t *testing.T) {
 	randObj.call("perm", 10).expect(r.Perm(10))
 
 	buf1 = make([]byte, 12)
-	buf2 = &tengo.Bytes{Value: make([]byte, 12)}
+	buf2 = &xgo.Bytes{Value: make([]byte, 12)}
 	n, _ = r.Read(buf1)
 	randObj.call("read", buf2).expect(n)
 	require.Equal(t, buf1, buf2.Value)

stdlib/source_modules.go

@@ -2,7 +2,13 @@
 
 package stdlib
 
+import "embed"
+var _ = embed.FS{}
+
+//go:embed srcmod_enum.xgo
+var srcmodEnum string
+
 // SourceModules are source type standard library modules.
 var SourceModules = map[string]string{
-	"enum": "is_enumerable := func(x) {\n  return is_array(x) || is_map(x) || is_immutable_array(x) || is_immutable_map(x)\n}\n\nis_array_like := func(x) {\n  return is_array(x) || is_immutable_array(x)\n}\n\nexport {\n  // all returns true if the given function `fn` evaluates to a truthy value on\n  // all of the items in `x`. It returns undefined if `x` is not enumerable.\n  all: func(x, fn) {\n    if !is_enumerable(x) { return undefined }\n\n    for k, v in x {\n      if !fn(k, v) { return false }\n    }\n\n    return true\n  },\n  // any returns true if the given function `fn` evaluates to a truthy value on\n  // any of the items in `x`. It returns undefined if `x` is not enumerable.\n  any: func(x, fn) {\n    if !is_enumerable(x) { return undefined }\n\n    for k, v in x {\n      if fn(k, v) { return true }\n    }\n\n    return false\n  },\n  // chunk returns an array of elements split into groups the length of size.\n  // If `x` can't be split evenly, the final chunk will be the remaining elements.\n  // It returns undefined if `x` is not array.\n  chunk: func(x, size) {\n    if !is_array_like(x) || !size { return undefined }\n\n    numElements := len(x)\n    if !numElements { return [] }\n\n    res := []\n    idx := 0\n    for idx < numElements {\n      res = append(res, x[idx:idx+size])\n      idx += size\n    }\n\n    return res\n  },\n  // at returns an element at the given index (if `x` is array) or\n  // key (if `x` is map). It returns undefined if `x` is not enumerable.\n  at: func(x, key) {\n    if !is_enumerable(x) { return undefined }\n\n    if is_array_like(x) {\n        if !is_int(key) { return undefined }\n    } else {\n        if !is_string(key) { return undefined }\n    }\n\n    return x[key]\n  },\n  // each iterates over elements of `x` and invokes `fn` for each element. `fn` is\n  // invoked with two arguments: `key` and `value`. `key` is an int index\n  // if `x` is array. `key` is a string key if `x` is map. It does not iterate\n  // and returns undefined if `x` is not enumerable.\n  each: func(x, fn) {\n    if !is_enumerable(x) { return undefined }\n\n    for k, v in x {\n      fn(k, v)\n    }\n  },\n  // filter iterates over elements of `x`, returning an array of all elements `fn`\n  // returns truthy for. `fn` is invoked with two arguments: `key` and `value`.\n  // `key` is an int index if `x` is array. It returns undefined if `x` is not array.\n  filter: func(x, fn) {\n    if !is_array_like(x) { return undefined }\n\n    dst := []\n    for k, v in x {\n      if fn(k, v) { dst = append(dst, v) }\n    }\n\n    return dst\n  },\n  // find iterates over elements of `x`, returning value of the first element `fn`\n  // returns truthy for. `fn` is invoked with two arguments: `key` and `value`.\n  // `key` is an int index if `x` is array. `key` is a string key if `x` is map.\n  // It returns undefined if `x` is not enumerable.\n  find: func(x, fn) {\n    if !is_enumerable(x) { return undefined }\n\n    for k, v in x {\n      if fn(k, v) { return v }\n    }\n  },\n  // find_key iterates over elements of `x`, returning key or index of the first\n  // element `fn` returns truthy for. `fn` is invoked with two arguments: `key`\n  // and `value`. `key` is an int index if `x` is array. `key` is a string key if\n  // `x` is map. It returns undefined if `x` is not enumerable.\n  find_key: func(x, fn) {\n    if !is_enumerable(x) { return undefined }\n\n    for k, v in x {\n      if fn(k, v) { return k }\n    }\n  },\n  // map creates an array of values by running each element in `x` through `fn`.\n  // `fn` is invoked with two arguments: `key` and `value`. `key` is an int index\n  // if `x` is array. `key` is a string key if `x` is map. It returns undefined\n  // if `x` is not enumerable.\n  map: func(x, fn) {\n    if !is_enumerable(x) { return undefined }\n\n    dst := []\n    for k, v in x {\n      dst = append(dst, fn(k, v))\n    }\n\n    return dst\n  },\n  // key returns the first argument.\n  key: func(k, _) { return k },\n  // value returns the second argument.\n  value: func(_, v) { return v }\n}\n",
+	"enum": srcmodEnum,
 }

stdlib/srcmod_enum.tengo

@@ -1,127 +0,0 @@
-is_enumerable := func(x) {
-  return is_array(x) || is_map(x) || is_immutable_array(x) || is_immutable_map(x)
-}
-
-is_array_like := func(x) {
-  return is_array(x) || is_immutable_array(x)
-}
-
-export {
-  // all returns true if the given function `fn` evaluates to a truthy value on
-  // all of the items in `x`. It returns undefined if `x` is not enumerable.
-  all: func(x, fn) {
-    if !is_enumerable(x) { return undefined }
-
-    for k, v in x {
-      if !fn(k, v) { return false }
-    }
-
-    return true
-  },
-  // any returns true if the given function `fn` evaluates to a truthy value on
-  // any of the items in `x`. It returns undefined if `x` is not enumerable.
-  any: func(x, fn) {
-    if !is_enumerable(x) { return undefined }
-
-    for k, v in x {
-      if fn(k, v) { return true }
-    }
-
-    return false
-  },
-  // chunk returns an array of elements split into groups the length of size.
-  // If `x` can't be split evenly, the final chunk will be the remaining elements.
-  // It returns undefined if `x` is not array.
-  chunk: func(x, size) {
-    if !is_array_like(x) || !size { return undefined }
-
-    numElements := len(x)
-    if !numElements { return [] }
-
-    res := []
-    idx := 0
-    for idx < numElements {
-      res = append(res, x[idx:idx+size])
-      idx += size
-    }
-
-    return res
-  },
-  // at returns an element at the given index (if `x` is array) or
-  // key (if `x` is map). It returns undefined if `x` is not enumerable.
-  at: func(x, key) {
-    if !is_enumerable(x) { return undefined }
-
-    if is_array_like(x) {
-        if !is_int(key) { return undefined }
-    } else {
-        if !is_string(key) { return undefined }
-    }
-
-    return x[key]
-  },
-  // each iterates over elements of `x` and invokes `fn` for each element. `fn` is
-  // invoked with two arguments: `key` and `value`. `key` is an int index
-  // if `x` is array. `key` is a string key if `x` is map. It does not iterate
-  // and returns undefined if `x` is not enumerable.
-  each: func(x, fn) {
-    if !is_enumerable(x) { return undefined }
-
-    for k, v in x {
-      fn(k, v)
-    }
-  },
-  // filter iterates over elements of `x`, returning an array of all elements `fn`
-  // returns truthy for. `fn` is invoked with two arguments: `key` and `value`.
-  // `key` is an int index if `x` is array. It returns undefined if `x` is not array.
-  filter: func(x, fn) {
-    if !is_array_like(x) { return undefined }
-
-    dst := []
-    for k, v in x {
-      if fn(k, v) { dst = append(dst, v) }
-    }
-
-    return dst
-  },
-  // find iterates over elements of `x`, returning value of the first element `fn`
-  // returns truthy for. `fn` is invoked with two arguments: `key` and `value`.
-  // `key` is an int index if `x` is array. `key` is a string key if `x` is map.
-  // It returns undefined if `x` is not enumerable.
-  find: func(x, fn) {
-    if !is_enumerable(x) { return undefined }
-
-    for k, v in x {
-      if fn(k, v) { return v }
-    }
-  },
-  // find_key iterates over elements of `x`, returning key or index of the first
-  // element `fn` returns truthy for. `fn` is invoked with two arguments: `key`
-  // and `value`. `key` is an int index if `x` is array. `key` is a string key if
-  // `x` is map. It returns undefined if `x` is not enumerable.
-  find_key: func(x, fn) {
-    if !is_enumerable(x) { return undefined }
-
-    for k, v in x {
-      if fn(k, v) { return k }
-    }
-  },
-  // map creates an array of values by running each element in `x` through `fn`.
-  // `fn` is invoked with two arguments: `key` and `value`. `key` is an int index
-  // if `x` is array. `key` is a string key if `x` is map. It returns undefined
-  // if `x` is not enumerable.
-  map: func(x, fn) {
-    if !is_enumerable(x) { return undefined }
-
-    dst := []
-    for k, v in x {
-      dst = append(dst, fn(k, v))
-    }
-
-    return dst
-  },
-  // key returns the first argument.
-  key: func(k, _) { return k },
-  // value returns the second argument.
-  value: func(_, v) { return v }
-}

stdlib/srcmod_enum.xgo

@@ -0,0 +1,179 @@
+is_enumerable := func(x) {
+	return is_array(x) || is_map(x) || is_immutable_array(x) || is_immutable_map(x)
+}
+
+is_array_like := func(x) {
+	return is_array(x) || is_immutable_array(x)
+}
+_swap := func(arr, left, right) {
+	if arr == undefined || len(arr) <= 1 || left < 0 || left >= len(arr) || right < 0 || right >= len(arr) || left >= right {
+		return
+	}
+	temp := arr[right]
+	arr[right] = arr[left]
+	arr[left] = temp
+}
+
+_sort := func(arr, left, right, less) {
+	if arr == undefined || len(arr) <= 1 || left < 0 || left >= len(arr) || right < 0 || right >= len(arr) || left >= right {
+		return arr
+	}
+	idx := left
+	for i := left; i < right; i++ {
+		if less(arr[i], arr[right]) {
+			_swap(arr, idx, i)
+			idx++
+		}
+	}
+	_swap(arr, idx, right)
+	_sort(arr, left, idx-1, less)
+	_sort(arr, idx+1, right, less)
+	return arr
+}
+
+export {
+	keys: func(x){
+		ret := []
+		for k, _ in x {
+			ret += [k]
+		}
+		return ret
+	},
+	values: func(x){
+		ret := []
+		for _, v in x {
+			ret += [v]
+		}
+		return ret
+	},
+	sort: func(arr, ...less) {
+		if !less {
+			less = func(a, b){
+				return a < b
+			}
+		} else {
+			less = less[0]
+		}
+		if arr == undefined || len(arr) <= 1 {
+			return arr
+		}
+		return _sort(arr, 0, len(arr)-1, less)
+	},
+	// all returns true if the given function `fn` evaluates to a truthy value on
+	// all of the items in `x`. It returns undefined if `x` is not enumerable.
+	all: func(x, fn) {
+		if !is_enumerable(x) { return undefined }
+
+		for k, v in x {
+			if !fn(k, v) { return false }
+		}
+
+		return true
+	},
+	// any returns true if the given function `fn` evaluates to a truthy value on
+	// any of the items in `x`. It returns undefined if `x` is not enumerable.
+	any: func(x, fn) {
+		if !is_enumerable(x) { return undefined }
+
+		for k, v in x {
+			if fn(k, v) { return true }
+		}
+
+		return false
+	},
+	// chunk returns an array of elements split into groups the length of size.
+	// If `x` can't be split evenly, the final chunk will be the remaining elements.
+	// It returns undefined if `x` is not array.
+	chunk: func(x, size) {
+		if !is_array_like(x) || !size { return undefined }
+
+		numElements := len(x)
+		if !numElements { return [] }
+
+		res := []
+		idx := 0
+		for idx < numElements {
+			res = append(res, x[idx:idx+size])
+			idx += size
+		}
+
+		return res
+	},
+	// at returns an element at the given index (if `x` is array) or
+	// key (if `x` is map). It returns undefined if `x` is not enumerable.
+	at: func(x, key) {
+		if !is_enumerable(x) { return undefined }
+
+		if is_array_like(x) {
+				if !is_int(key) { return undefined }
+		} else {
+				if !is_string(key) { return undefined }
+		}
+
+		return x[key]
+	},
+	// each iterates over elements of `x` and invokes `fn` for each element. `fn` is
+	// invoked with two arguments: `key` and `value`. `key` is an int index
+	// if `x` is array. `key` is a string key if `x` is map. It does not iterate
+	// and returns undefined if `x` is not enumerable.
+	each: func(x, fn) {
+		if !is_enumerable(x) { return undefined }
+
+		for k, v in x {
+			fn(k, v)
+		}
+	},
+	// filter iterates over elements of `x`, returning an array of all elements `fn`
+	// returns truthy for. `fn` is invoked with two arguments: `key` and `value`.
+	// `key` is an int index if `x` is array. It returns undefined if `x` is not array.
+	filter: func(x, fn) {
+		if !is_array_like(x) { return undefined }
+
+		dst := []
+		for k, v in x {
+			if fn(k, v) { dst = append(dst, v) }
+		}
+
+		return dst
+	},
+	// find iterates over elements of `x`, returning value of the first element `fn`
+	// returns truthy for. `fn` is invoked with two arguments: `key` and `value`.
+	// `key` is an int index if `x` is array. `key` is a string key if `x` is map.
+	// It returns undefined if `x` is not enumerable.
+	find: func(x, fn) {
+		if !is_enumerable(x) { return undefined }
+
+		for k, v in x {
+			if fn(k, v) { return v }
+		}
+	},
+	// find_key iterates over elements of `x`, returning key or index of the first
+	// element `fn` returns truthy for. `fn` is invoked with two arguments: `key`
+	// and `value`. `key` is an int index if `x` is array. `key` is a string key if
+	// `x` is map. It returns undefined if `x` is not enumerable.
+	find_key: func(x, fn) {
+		if !is_enumerable(x) { return undefined }
+
+		for k, v in x {
+			if fn(k, v) { return k }
+		}
+	},
+	// map creates an array of values by running each element in `x` through `fn`.
+	// `fn` is invoked with two arguments: `key` and `value`. `key` is an int index
+	// if `x` is array. `key` is a string key if `x` is map. It returns undefined
+	// if `x` is not enumerable.
+	map: func(x, fn) {
+		if !is_enumerable(x) { return undefined }
+
+		dst := []
+		for k, v in x {
+			dst = append(dst, fn(k, v))
+		}
+
+		return dst
+	},
+	// key returns the first argument.
+	key: func(k, _) { return k },
+	// value returns the second argument.
+	value: func(_, v) { return v }
+}

stdlib/stdlib.go

@@ -3,7 +3,7 @@ package stdlib
 //go:generate go run gensrcmods.go
 
 import (
-	"github.com/d5/tengo/v2"
+	"surdeus.su/core/xgo/v2"
 )
 
 // AllModuleNames returns a list of all default module names.
@@ -20,8 +20,8 @@ func AllModuleNames() []string {
 
 // GetModuleMap returns the module map that includes all modules
 // for the given module names.
-func GetModuleMap(names ...string) *tengo.ModuleMap {
-	modules := tengo.NewModuleMap()
+func GetModuleMap(names ...string) *xgo.ModuleMap {
+	modules := xgo.NewModuleMap()
 	for _, name := range names {
 		if mod := BuiltinModules[name]; mod != nil {
 			modules.AddBuiltinModule(name, mod)

stdlib/stdlib_test.go

@@ -5,9 +5,9 @@ import (
 	"testing"
 	"time"
 
-	"github.com/d5/tengo/v2"
-	"github.com/d5/tengo/v2/require"
-	"github.com/d5/tengo/v2/stdlib"
+	"surdeus.su/core/xgo/v2"
+	"surdeus.su/core/xgo/v2/require"
+	"surdeus.su/core/xgo/v2/stdlib"
 )
 
 type ARR = []interface{}
@@ -105,20 +105,20 @@ func (c callres) call(funcName string, args ...interface{}) callres {
 		return c
 	}
 
-	var oargs []tengo.Object
+	var oargs []xgo.Object
 	for _, v := range args {
 		oargs = append(oargs, object(v))
 	}
 
 	switch o := c.o.(type) {
-	case *tengo.BuiltinModule:
+	case *xgo.BuiltinModule:
 		m, ok := o.Attrs[funcName]
 		if !ok {
 			return callres{t: c.t, e: fmt.Errorf(
 				"function not found: %s", funcName)}
 		}
 
-		f, ok := m.(*tengo.UserFunction)
+		f, ok := m.(*xgo.UserFunction)
 		if !ok {
 			return callres{t: c.t, e: fmt.Errorf(
 				"non-callable: %s", funcName)}
@@ -126,16 +126,16 @@ func (c callres) call(funcName string, args ...interface{}) callres {
 
 		res, err := f.Value(oargs...)
 		return callres{t: c.t, o: res, e: err}
-	case *tengo.UserFunction:
+	case *xgo.UserFunction:
 		res, err := o.Value(oargs...)
 		return callres{t: c.t, o: res, e: err}
-	case *tengo.ImmutableMap:
+	case *xgo.ImmutableMap:
 		m, ok := o.Value[funcName]
 		if !ok {
 			return callres{t: c.t, e: fmt.Errorf("function not found: %s", funcName)}
 		}
 
-		f, ok := m.(*tengo.UserFunction)
+		f, ok := m.(*xgo.UserFunction)
 		if !ok {
 			return callres{t: c.t, e: fmt.Errorf("non-callable: %s", funcName)}
 		}
@@ -165,73 +165,73 @@ func module(t *testing.T, moduleName string) callres {
 	return callres{t: t, o: mod}
 }
 
-func object(v interface{}) tengo.Object {
+func object(v interface{}) xgo.Object {
 	switch v := v.(type) {
-	case tengo.Object:
+	case xgo.Object:
 		return v
 	case string:
-		return &tengo.String{Value: v}
+		return &xgo.String{Value: v}
 	case int64:
-		return &tengo.Int{Value: v}
+		return &xgo.Int{Value: v}
 	case int: // for convenience
-		return &tengo.Int{Value: int64(v)}
+		return &xgo.Int{Value: int64(v)}
 	case bool:
 		if v {
-			return tengo.TrueValue
+			return xgo.TrueValue
 		}
-		return tengo.FalseValue
+		return xgo.FalseValue
 	case rune:
-		return &tengo.Char{Value: v}
+		return &xgo.Char{Value: v}
 	case byte: // for convenience
-		return &tengo.Char{Value: rune(v)}
+		return &xgo.Char{Value: rune(v)}
 	case float64:
-		return &tengo.Float{Value: v}
+		return &xgo.Float{Value: v}
 	case []byte:
-		return &tengo.Bytes{Value: v}
+		return &xgo.Bytes{Value: v}
 	case MAP:
-		objs := make(map[string]tengo.Object)
+		objs := make(map[string]xgo.Object)
 		for k, v := range v {
 			objs[k] = object(v)
 		}
 
-		return &tengo.Map{Value: objs}
+		return &xgo.Map{Value: objs}
 	case ARR:
-		var objs []tengo.Object
+		var objs []xgo.Object
 		for _, e := range v {
 			objs = append(objs, object(e))
 		}
 
-		return &tengo.Array{Value: objs}
+		return &xgo.Array{Value: objs}
 	case IMAP:
-		objs := make(map[string]tengo.Object)
+		objs := make(map[string]xgo.Object)
 		for k, v := range v {
 			objs[k] = object(v)
 		}
 
-		return &tengo.ImmutableMap{Value: objs}
+		return &xgo.ImmutableMap{Value: objs}
 	case IARR:
-		var objs []tengo.Object
+		var objs []xgo.Object
 		for _, e := range v {
 			objs = append(objs, object(e))
 		}
 
-		return &tengo.ImmutableArray{Value: objs}
+		return &xgo.ImmutableArray{Value: objs}
 	case time.Time:
-		return &tengo.Time{Value: v}
+		return &xgo.Time{Value: v}
 	case []int:
-		var objs []tengo.Object
+		var objs []xgo.Object
 		for _, e := range v {
-			objs = append(objs, &tengo.Int{Value: int64(e)})
+			objs = append(objs, &xgo.Int{Value: int64(e)})
 		}
 
-		return &tengo.Array{Value: objs}
+		return &xgo.Array{Value: objs}
 	}
 
 	panic(fmt.Errorf("unknown type: %T", v))
 }
 
 func expect(t *testing.T, input string, expected interface{}) {
-	s := tengo.NewScript([]byte(input))
+	s := xgo.NewScript([]byte(input))
 	s.SetImports(stdlib.GetModuleMap(stdlib.AllModuleNames()...))
 	c, err := s.Run()
 	require.NoError(t, err)

stdlib/text_regexp.go

@@ -3,26 +3,26 @@ package stdlib
 import (
 	"regexp"
 
-	"github.com/d5/tengo/v2"
+	"surdeus.su/core/xgo/v2"
 )
 
-func makeTextRegexp(re *regexp.Regexp) *tengo.ImmutableMap {
-	return &tengo.ImmutableMap{
-		Value: map[string]tengo.Object{
+func makeTextRegexp(re *regexp.Regexp) *xgo.ImmutableMap {
+	return &xgo.ImmutableMap{
+		Value: map[string]xgo.Object{
 			// match(text) => bool
-			"match": &tengo.UserFunction{
-				Value: func(args ...tengo.Object) (
-					ret tengo.Object,
+			"match": &xgo.UserFunction{
+				Value: func(args ...xgo.Object) (
+					ret xgo.Object,
 					err error,
 				) {
 					if len(args) != 1 {
-						err = tengo.ErrWrongNumArguments
+						err = xgo.ErrWrongNumArguments
 						return
 					}
 
-					s1, ok := tengo.ToString(args[0])
+					s1, ok := xgo.ToString(args[0])
 					if !ok {
-						err = tengo.ErrInvalidArgumentType{
+						err = xgo.ErrInvalidArgumentType{
 							Name:     "first",
 							Expected: "string(compatible)",
 							Found:    args[0].TypeName(),
@@ -31,9 +31,9 @@ func makeTextRegexp(re *regexp.Regexp) *tengo.ImmutableMap {
 					}
 
 					if re.MatchString(s1) {
-						ret = tengo.TrueValue
+						ret = xgo.TrueValue
 					} else {
-						ret = tengo.FalseValue
+						ret = xgo.FalseValue
 					}
 
 					return
@@ -42,20 +42,20 @@ func makeTextRegexp(re *regexp.Regexp) *tengo.ImmutableMap {
 
 			// find(text) 			=> array(array({text:,begin:,end:}))/undefined
 			// find(text, maxCount) => array(array({text:,begin:,end:}))/undefined
-			"find": &tengo.UserFunction{
-				Value: func(args ...tengo.Object) (
-					ret tengo.Object,
+			"find": &xgo.UserFunction{
+				Value: func(args ...xgo.Object) (
+					ret xgo.Object,
 					err error,
 				) {
 					numArgs := len(args)
 					if numArgs != 1 && numArgs != 2 {
-						err = tengo.ErrWrongNumArguments
+						err = xgo.ErrWrongNumArguments
 						return
 					}
 
-					s1, ok := tengo.ToString(args[0])
+					s1, ok := xgo.ToString(args[0])
 					if !ok {
-						err = tengo.ErrInvalidArgumentType{
+						err = xgo.ErrInvalidArgumentType{
 							Name:     "first",
 							Expected: "string(compatible)",
 							Found:    args[0].TypeName(),
@@ -66,35 +66,35 @@ func makeTextRegexp(re *regexp.Regexp) *tengo.ImmutableMap {
 					if numArgs == 1 {
 						m := re.FindStringSubmatchIndex(s1)
 						if m == nil {
-							ret = tengo.UndefinedValue
+							ret = xgo.UndefinedValue
 							return
 						}
 
-						arr := &tengo.Array{}
+						arr := &xgo.Array{}
 						for i := 0; i < len(m); i += 2 {
 							arr.Value = append(arr.Value,
-								&tengo.ImmutableMap{
-									Value: map[string]tengo.Object{
-										"text": &tengo.String{
+								&xgo.ImmutableMap{
+									Value: map[string]xgo.Object{
+										"text": &xgo.String{
 											Value: s1[m[i]:m[i+1]],
 										},
-										"begin": &tengo.Int{
+										"begin": &xgo.Int{
 											Value: int64(m[i]),
 										},
-										"end": &tengo.Int{
+										"end": &xgo.Int{
 											Value: int64(m[i+1]),
 										},
 									}})
 						}
 
-						ret = &tengo.Array{Value: []tengo.Object{arr}}
+						ret = &xgo.Array{Value: []xgo.Object{arr}}
 
 						return
 					}
 
-					i2, ok := tengo.ToInt(args[1])
+					i2, ok := xgo.ToInt(args[1])
 					if !ok {
-						err = tengo.ErrInvalidArgumentType{
+						err = xgo.ErrInvalidArgumentType{
 							Name:     "second",
 							Expected: "int(compatible)",
 							Found:    args[1].TypeName(),
@@ -103,24 +103,24 @@ func makeTextRegexp(re *regexp.Regexp) *tengo.ImmutableMap {
 					}
 					m := re.FindAllStringSubmatchIndex(s1, i2)
 					if m == nil {
-						ret = tengo.UndefinedValue
+						ret = xgo.UndefinedValue
 						return
 					}
 
-					arr := &tengo.Array{}
+					arr := &xgo.Array{}
 					for _, m := range m {
-						subMatch := &tengo.Array{}
+						subMatch := &xgo.Array{}
 						for i := 0; i < len(m); i += 2 {
 							subMatch.Value = append(subMatch.Value,
-								&tengo.ImmutableMap{
-									Value: map[string]tengo.Object{
-										"text": &tengo.String{
+								&xgo.ImmutableMap{
+									Value: map[string]xgo.Object{
+										"text": &xgo.String{
 											Value: s1[m[i]:m[i+1]],
 										},
-										"begin": &tengo.Int{
+										"begin": &xgo.Int{
 											Value: int64(m[i]),
 										},
-										"end": &tengo.Int{
+										"end": &xgo.Int{
 											Value: int64(m[i+1]),
 										},
 									}})
@@ -136,19 +136,19 @@ func makeTextRegexp(re *regexp.Regexp) *tengo.ImmutableMap {
 			},
 
 			// replace(src, repl) => string
-			"replace": &tengo.UserFunction{
-				Value: func(args ...tengo.Object) (
-					ret tengo.Object,
+			"replace": &xgo.UserFunction{
+				Value: func(args ...xgo.Object) (
+					ret xgo.Object,
 					err error,
 				) {
 					if len(args) != 2 {
-						err = tengo.ErrWrongNumArguments
+						err = xgo.ErrWrongNumArguments
 						return
 					}
 
-					s1, ok := tengo.ToString(args[0])
+					s1, ok := xgo.ToString(args[0])
 					if !ok {
-						err = tengo.ErrInvalidArgumentType{
+						err = xgo.ErrInvalidArgumentType{
 							Name:     "first",
 							Expected: "string(compatible)",
 							Found:    args[0].TypeName(),
@@ -156,9 +156,9 @@ func makeTextRegexp(re *regexp.Regexp) *tengo.ImmutableMap {
 						return
 					}
 
-					s2, ok := tengo.ToString(args[1])
+					s2, ok := xgo.ToString(args[1])
 					if !ok {
-						err = tengo.ErrInvalidArgumentType{
+						err = xgo.ErrInvalidArgumentType{
 							Name:     "second",
 							Expected: "string(compatible)",
 							Found:    args[1].TypeName(),
@@ -168,10 +168,10 @@ func makeTextRegexp(re *regexp.Regexp) *tengo.ImmutableMap {
 
 					s, ok := doTextRegexpReplace(re, s1, s2)
 					if !ok {
-						return nil, tengo.ErrStringLimit
+						return nil, xgo.ErrStringLimit
 					}
 
-					ret = &tengo.String{Value: s}
+					ret = &xgo.String{Value: s}
 
 					return
 				},
@@ -179,20 +179,20 @@ func makeTextRegexp(re *regexp.Regexp) *tengo.ImmutableMap {
 
 			// split(text) 			 => array(string)
 			// split(text, maxCount) => array(string)
-			"split": &tengo.UserFunction{
-				Value: func(args ...tengo.Object) (
-					ret tengo.Object,
+			"split": &xgo.UserFunction{
+				Value: func(args ...xgo.Object) (
+					ret xgo.Object,
 					err error,
 				) {
 					numArgs := len(args)
 					if numArgs != 1 && numArgs != 2 {
-						err = tengo.ErrWrongNumArguments
+						err = xgo.ErrWrongNumArguments
 						return
 					}
 
-					s1, ok := tengo.ToString(args[0])
+					s1, ok := xgo.ToString(args[0])
 					if !ok {
-						err = tengo.ErrInvalidArgumentType{
+						err = xgo.ErrInvalidArgumentType{
 							Name:     "first",
 							Expected: "string(compatible)",
 							Found:    args[0].TypeName(),
@@ -202,9 +202,9 @@ func makeTextRegexp(re *regexp.Regexp) *tengo.ImmutableMap {
 
 					var i2 = -1
 					if numArgs > 1 {
-						i2, ok = tengo.ToInt(args[1])
+						i2, ok = xgo.ToInt(args[1])
 						if !ok {
-							err = tengo.ErrInvalidArgumentType{
+							err = xgo.ErrInvalidArgumentType{
 								Name:     "second",
 								Expected: "int(compatible)",
 								Found:    args[1].TypeName(),
@@ -213,10 +213,10 @@ func makeTextRegexp(re *regexp.Regexp) *tengo.ImmutableMap {
 						}
 					}
 
-					arr := &tengo.Array{}
+					arr := &xgo.Array{}
 					for _, s := range re.Split(s1, i2) {
 						arr.Value = append(arr.Value,
-							&tengo.String{Value: s})
+							&xgo.String{Value: s})
 					}
 
 					ret = arr
@@ -235,14 +235,14 @@ func doTextRegexpReplace(re *regexp.Regexp, src, repl string) (string, bool) {
 	for _, m := range re.FindAllStringSubmatchIndex(src, -1) {
 		var exp []byte
 		exp = re.ExpandString(exp, repl, src, m)
-		if len(out)+m[0]-idx+len(exp) > tengo.MaxStringLen {
+		if len(out)+m[0]-idx+len(exp) > xgo.MaxStringLen {
 			return "", false
 		}
 		out += src[idx:m[0]] + string(exp)
 		idx = m[1]
 	}
 	if idx < len(src) {
-		if len(out)+len(src)-idx > tengo.MaxStringLen {
+		if len(out)+len(src)-idx > xgo.MaxStringLen {
 			return "", false
 		}
 		out += src[idx:]

stdlib/text_test.go

@@ -4,7 +4,7 @@ import (
 	"regexp"
 	"testing"
 
-	"github.com/d5/tengo/v2"
+	"surdeus.su/core/xgo/v2"
 )
 
 func TestTextRE(t *testing.T) {
@@ -33,7 +33,7 @@ func TestTextRE(t *testing.T) {
 		text     string
 		expected interface{}
 	}{
-		{"a(b)", "", tengo.UndefinedValue},
+		{"a(b)", "", xgo.UndefinedValue},
 		{"a(b)", "ab", ARR{
 			ARR{
 				IMAP{"text": "ab", "begin": 0, "end": 2},
@@ -67,7 +67,7 @@ func TestTextRE(t *testing.T) {
 		count    int
 		expected interface{}
 	}{
-		{"a(b)", "", -1, tengo.UndefinedValue},
+		{"a(b)", "", -1, xgo.UndefinedValue},
 		{"a(b)", "ab", -1, ARR{
 			ARR{
 				IMAP{"text": "ab", "begin": 0, "end": 2},
@@ -96,7 +96,7 @@ func TestTextRE(t *testing.T) {
 				IMAP{"text": "c", "begin": 9, "end": 10},
 			},
 		}},
-		{"(a)b(c)d", "abcdefgabcd", 0, tengo.UndefinedValue},
+		{"(a)b(c)d", "abcdefgabcd", 0, xgo.UndefinedValue},
 		{"(a)b(c)d", "abcdefgabcd", 1, ARR{
 			ARR{
 				IMAP{"text": "abcd", "begin": 0, "end": 4},
@@ -232,9 +232,9 @@ func TestText(t *testing.T) {
 }
 
 func TestReplaceLimit(t *testing.T) {
-	curMaxStringLen := tengo.MaxStringLen
-	defer func() { tengo.MaxStringLen = curMaxStringLen }()
-	tengo.MaxStringLen = 12
+	curMaxStringLen := xgo.MaxStringLen
+	defer func() { xgo.MaxStringLen = curMaxStringLen }()
+	xgo.MaxStringLen = 12
 
 	module(t, "text").call("replace", "123456789012", "1", "x", -1).
 		expect("x234567890x2")
@@ -264,9 +264,9 @@ func TestReplaceLimit(t *testing.T) {
 }
 
 func TestTextRepeat(t *testing.T) {
-	curMaxStringLen := tengo.MaxStringLen
-	defer func() { tengo.MaxStringLen = curMaxStringLen }()
-	tengo.MaxStringLen = 12
+	curMaxStringLen := xgo.MaxStringLen
+	defer func() { xgo.MaxStringLen = curMaxStringLen }()
+	xgo.MaxStringLen = 12
 
 	module(t, "text").call("repeat", "1234", "3").
 		expect("123412341234")

stdlib/times_test.go

@@ -4,8 +4,8 @@ import (
 	"testing"
 	"time"
 
-	"github.com/d5/tengo/v2"
-	"github.com/d5/tengo/v2/require"
+	"surdeus.su/core/xgo/v2"
+	"surdeus.su/core/xgo/v2/require"
 )
 
 func TestTimes(t *testing.T) {
@@ -14,14 +14,14 @@ func TestTimes(t *testing.T) {
 	location, _ := time.LoadLocation("Pacific/Auckland")
 	time3 := time.Date(1982, 9, 28, 19, 21, 44, 999, location)
 
-	module(t, "times").call("sleep", 1).expect(tengo.UndefinedValue)
+	module(t, "times").call("sleep", 1).expect(xgo.UndefinedValue)
 
 	require.True(t, module(t, "times").
 		call("since", time.Now().Add(-time.Hour)).
-		o.(*tengo.Int).Value > 3600000000000)
+		o.(*xgo.Int).Value > 3600000000000)
 	require.True(t, module(t, "times").
 		call("until", time.Now().Add(time.Hour)).
-		o.(*tengo.Int).Value < 3600000000000)
+		o.(*xgo.Int).Value < 3600000000000)
 
 	module(t, "times").call("parse_duration", "1ns").expect(1)
 	module(t, "times").call("parse_duration", "1ms").expect(1000000)
@@ -41,7 +41,7 @@ func TestTimes(t *testing.T) {
 		expect(time3)
 
 	nowD := time.Until(module(t, "times").call("now").
-		o.(*tengo.Time).Value).Nanoseconds()
+		o.(*xgo.Time).Value).Nanoseconds()
 	require.True(t, 0 > nowD && nowD > -100000000) // within 100ms
 	parsed, _ := time.Parse(time.RFC3339, "1982-09-28T19:21:44+07:00")
 	module(t, "times").

stdlib/url/url.go

@@ -0,0 +1,77 @@
+package url
+
+import (
+	"surdeus.su/core/xgo/v2"
+	"net/url"
+	"fmt"
+)
+
+var _ = xgo.Object(&Values{})
+
+type Values struct {
+	xgo.ObjectImpl
+	url.Values
+}
+
+func (vs *Values) TypeName() string {
+	return "*url.Values"
+}
+
+func (vs *Values) String() string {
+	return fmt.Sprintf("%v", vs.Values)
+}
+
+func (vs *Values) IndexGet(
+	index xgo.Object,
+) (xgo.Object, error) {
+	key, ok := xgo.ToString(index)
+	if !ok {
+		return nil, xgo.ErrInvalidIndexValueType
+	}
+
+	val, ok := vs.Values[key]
+	if !ok {
+		return nil, nil
+	}
+
+	arr := make([]xgo.Object, len(val))
+	for i, v := range val {
+		arr[i], _ = xgo.FromInterface(v)
+	}
+
+	return &xgo.Array{Value: arr}, nil
+}
+
+type URL struct {
+	xgo.ObjectImpl
+	*url.URL
+}
+
+func (u *URL) TypeName() string {
+	return "<URL>"
+}
+
+func (u *URL) String() string {
+	return u.URL.String()
+}
+
+func (u *URL) IndexGet(
+	index xgo.Object,
+) (xgo.Object, error) {
+	key, ok := xgo.ToString(index)
+	if !ok {
+		return nil, xgo.ErrInvalidIndexValueType
+	}
+
+	switch key {
+	case "path":
+		return xgo.FromInterface(u.Path)
+	case "query":
+		return &Values{
+			Values: u.Query(),
+		}, nil
+	}
+
+	// Nothing found.
+	return nil, nil
+}

symbol_table.go

@@ -1,4 +1,4 @@
-package tengo
+package xgo
 
 // SymbolScope represents a symbol scope.
 type SymbolScope string

symbol_table_test.go

@@ -1,10 +1,10 @@
-package tengo_test
+package xgo_test
 
 import (
 	"testing"
 
-	"github.com/d5/tengo/v2"
-	"github.com/d5/tengo/v2/require"
+	"surdeus.su/core/xgo/v2"
+	"surdeus.su/core/xgo/v2/require"
 )
 
 func TestSymbolTable(t *testing.T) {

tengo.go

@@ -1,4 +1,4 @@
-package tengo
+package xgo
 
 import (
 	"errors"
@@ -28,7 +28,7 @@ const (
 	MaxFrames = 1024
 
 	// SourceFileExtDefault is the default extension for source files.
-	SourceFileExtDefault = ".tengo"
+	SourceFileExtDefault = ".xgo"
 )
 
 // CallableFunc is a function signature for the callable functions.

tengo_test.go

@@ -1,13 +1,13 @@
-package tengo_test
+package xgo_test
 
 import (
 	"strings"
 	"testing"
 	"time"
 
-	"github.com/d5/tengo/v2"
-	"github.com/d5/tengo/v2/parser"
-	"github.com/d5/tengo/v2/require"
+	"surdeus.su/core/xgo/v2"
+	"surdeus.su/core/xgo/v2/parser"
+	"surdeus.su/core/xgo/v2/require"
 )
 
 func TestInstructions_String(t *testing.T) {

testdata/libs/array.tengo

@@ -0,0 +1,22 @@
+enum := import("enumx")
+fmt := import("log")
+
+object := {
+	key1: "cock",
+	key2: "dick",
+	key3: "check",
+	key4: "die",
+	key5: "wasd"
+}
+keys := enum.keys(object)
+values := enum.values(object)
+
+sorted_values := enum.sort(values, func(a, b){
+	return b < a
+})
+
+ia := [5, 100, 531, 7537, 1, 2, -100, 1.535]
+fmt.println(enum.sort(ia))
+fmt.println(sorted_values)
+
+

testdata/libs/cjson.xgo

@@ -0,0 +1,20 @@
+cjson := import("cjson")
+fmt := import("fmt")
+log := import("log")
+dec := cjson.Decoder("<stdin>")
+
+log.print("cock")
+log.print("die")
+
+log.println("some log")
+for {
+	v := dec.decode()
+	if is_error(v) {
+		break
+	}
+	if !v {
+		break
+	}
+	log.println("got one more value")
+	fmt.println(v)
+}

testdata/libs/data.cjson

@@ -0,0 +1,4 @@
+{"somename": {
+	"value": 1
+}}
+["array",135,"integers", 135, 135]

testdata/libs/dogs.xgo

@@ -0,0 +1,22 @@
+objects := import("objects")
+fmt := import("fmt")
+
+new := func(name) {
+	ret := objects.new()
+	ret.name = name
+
+	ret.def("bark", func(self, n){
+		fmt.print(self.name, ": ")
+		for i:=0 ; i<n ; i++ {
+			fmt.print("BARK!")
+		}
+		fmt.println()
+	})
+
+	return ret
+}
+
+
+export {
+	"new": new
+}

testdata/libs/html.xgo

@@ -0,0 +1,27 @@
+fmt := import("fmt")
+http := import("http")
+html := import("html").Renderer()
+
+added := html.ul()
+for i in [1, 2, 3, 4, 5] {
+	added.add(html.li().body(i))
+}
+
+fmt.println(
+	html.html({
+		lang: "en"
+	}).body(
+		html.head().body(
+			html.link({
+				rel: "stylesheet",
+				href: "/web/main.css"
+			}).final()
+		),
+		html.body().body(
+			html.p().body(
+				">>>shit"
+			)
+		),
+		added
+	)
+)

testdata/libs/http.xgo

@@ -0,0 +1,19 @@
+fmt := import("fmt")
+http := import("http")
+os := import("os")
+
+resp := http.post_json(
+	"https://jsonplaceholder.typicode.com/posts", {
+		title: "Hello, World!",
+		body: "Checking shit out!",
+		userId: 1
+	}
+)
+if is_error(resp) {
+	fmt.println(resp)
+	os.exit(1)
+}
+
+body := resp.body_json
+fmt.println(body)
+

testdata/libs/import.xgo

@@ -0,0 +1,7 @@
+fmt := import("fmt")
+dogs := import("./tests/dogs")
+
+dog := dogs.new("check")
+//fmt.println(dog)
+dog.bark(10)
+

testdata/libs/paths.xgo

@@ -0,0 +1,8 @@
+fmt := import("fmt")
+paths := import("paths")
+os := import("os")
+
+for path in os.args()[2:] {
+	fmt.println(paths.base(path))
+}
+

variable.go

@@ -1,4 +1,4 @@
-package tengo
+package xgo
 
 import (
 	"errors"

variable_test.go

@@ -1,10 +1,10 @@
-package tengo_test
+package xgo_test
 
 import (
 	"testing"
 
-	"github.com/d5/tengo/v2"
-	"github.com/d5/tengo/v2/require"
+	"surdeus.su/core/xgo/v2"
+	"surdeus.su/core/xgo/v2/require"
 )
 
 type VariableTest struct {

vm.go

@@ -1,11 +1,11 @@
-package tengo
+package xgo
 
 import (
 	"fmt"
 	"sync/atomic"
 
-	"github.com/d5/tengo/v2/parser"
-	"github.com/d5/tengo/v2/token"
+	"surdeus.su/core/xgo/v2/parser"
+	"surdeus.su/core/xgo/v2/token"
 )
 
 // frame represents a function call frame.

vm_test.go

@@ -1,4 +1,4 @@
-package tengo_test
+package xgo_test
 
 import (
 	"errors"
@@ -10,11 +10,11 @@ import (
 	"strings"
 	"testing"
 
-	"github.com/d5/tengo/v2"
-	"github.com/d5/tengo/v2/parser"
-	"github.com/d5/tengo/v2/require"
-	"github.com/d5/tengo/v2/stdlib"
-	"github.com/d5/tengo/v2/token"
+	"surdeus.su/core/xgo/v2"
+	"surdeus.su/core/xgo/v2/parser"
+	"surdeus.su/core/xgo/v2/require"
+	"surdeus.su/core/xgo/v2/stdlib"
+	"surdeus.su/core/xgo/v2/token"
 )
 
 const testOut = "out"