xgo/objects/builtin_function.go
Daniel 3500c686b3
Improvements on compiler/VM error reporting (filename:line:col)
- add type infos to VM error messages
- add 'Name' to UserFunction objects 
- add 'expectErrorString' to VM tests
- replace vm.expectError() with vm.expectErrorString() to make it more explicit
- add source map info to VM error messages
- optimization in function calls
- add file/line/col info to compiler errors
- change stdlib module to be loaded from VM (instead of compiler) so they can be properly loaded after the source is compiled into binary
- VM can take builtin modules optionally
2019-02-20 16:26:11 -08:00

47 lines
1.1 KiB
Go

package objects
import (
"github.com/d5/tengo/compiler/token"
)
// BuiltinFunction represents a builtin function.
type BuiltinFunction struct {
Name string
Value CallableFunc
}
// TypeName returns the name of the type.
func (o *BuiltinFunction) TypeName() string {
return "builtin-function:" + o.Name
}
func (o *BuiltinFunction) String() string {
return "<builtin-function>"
}
// BinaryOp returns another object that is the result of
// a given binary operator and a right-hand side object.
func (o *BuiltinFunction) BinaryOp(op token.Token, rhs Object) (Object, error) {
return nil, ErrInvalidOperator
}
// Copy returns a copy of the type.
func (o *BuiltinFunction) Copy() Object {
return &BuiltinFunction{Value: o.Value}
}
// IsFalsy returns true if the value of the type is falsy.
func (o *BuiltinFunction) IsFalsy() bool {
return false
}
// Equals returns true if the value of the type
// is equal to the value of another object.
func (o *BuiltinFunction) Equals(x Object) bool {
return false
}
// Call executes a builtin function.
func (o *BuiltinFunction) Call(args ...Object) (Object, error) {
return o.Value(args...)
}