a747c98fb5
objects/builtin_convert.go: Added defaults to all builtin convert functions except bool as this one returns false for undefined, instead of undefined. runtime/vm_builtin_test.go: Added tests for checking default value behaviour for builtin convert funcs
148 lines
2.6 KiB
Go
148 lines
2.6 KiB
Go
package objects
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func builtinString(args ...Object) (Object, error) {
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argsLen := len(args)
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if !(argsLen == 1 || argsLen == 2) {
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return nil, ErrWrongNumArguments
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}
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if _, ok := args[0].(*String); ok {
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return args[0], nil
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}
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v, ok := ToString(args[0])
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if ok {
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return &String{Value: v}, nil
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}
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if argsLen == 2 {
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if _, ok := args[1].(*String); ok {
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return args[1], nil
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}
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}
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return UndefinedValue, nil
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}
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func builtinInt(args ...Object) (Object, error) {
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argsLen := len(args)
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if !(argsLen == 1 || argsLen == 2) {
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return nil, ErrWrongNumArguments
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}
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if _, ok := args[0].(*Int); ok {
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return args[0], nil
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}
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v, ok := ToInt64(args[0])
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if ok {
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return &Int{Value: v}, nil
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}
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if argsLen == 2 {
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if _, ok := args[1].(*Int); ok {
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return args[1], nil
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}
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}
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return UndefinedValue, nil
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}
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func builtinFloat(args ...Object) (Object, error) {
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argsLen := len(args)
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if !(argsLen == 1 || argsLen == 2) {
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return nil, ErrWrongNumArguments
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}
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if _, ok := args[0].(*Float); ok {
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return args[0], nil
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}
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v, ok := ToFloat64(args[0])
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if ok {
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return &Float{Value: v}, nil
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}
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if argsLen == 2 {
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if _, ok := args[1].(*Float); ok {
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return args[1], nil
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} else if _, ok := args[1].(*Int); ok {
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v, _ := ToFloat64(args[1])
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return &Float{Value: v}, nil
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}
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}
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return UndefinedValue, nil
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}
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func builtinBool(args ...Object) (Object, error) {
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if len(args) != 1 {
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return nil, ErrWrongNumArguments
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}
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if _, ok := args[0].(*Bool); ok {
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return args[0], nil
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}
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v, ok := ToBool(args[0])
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if ok {
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return &Bool{Value: v}, nil
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}
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return UndefinedValue, nil
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}
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func builtinChar(args ...Object) (Object, error) {
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argsLen := len(args)
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if !(argsLen == 1 || argsLen == 2) {
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return nil, ErrWrongNumArguments
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}
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if _, ok := args[0].(*Char); ok {
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return args[0], nil
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}
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v, ok := ToRune(args[0])
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if ok {
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return &Char{Value: v}, nil
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}
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if argsLen == 2 {
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if _, ok := args[1].(*Char); ok {
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return args[1], nil
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}
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}
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return UndefinedValue, nil
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}
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func builtinBytes(args ...Object) (Object, error) {
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argsLen := len(args)
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if !(argsLen == 1 || argsLen == 2) {
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return nil, ErrWrongNumArguments
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}
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// bytes(N) => create a new bytes with given size N
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if n, ok := args[0].(*Int); ok {
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return &Bytes{Value: make([]byte, int(n.Value))}, nil
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}
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v, ok := ToByteSlice(args[0])
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if ok {
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return &Bytes{Value: v}, nil
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}
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if argsLen == 2 {
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// bytes(N) => create a new bytes with given size N
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if n, ok := args[1].(*Int); ok {
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return &Bytes{Value: make([]byte, int(n.Value))}, nil
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}
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v, ok = ToByteSlice(args[1])
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if ok {
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return &Bytes{Value: v}, nil
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}
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}
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return UndefinedValue, nil
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}
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