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function.go
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function.go
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// Copyright 2021 Roger Chapman and the v8go contributors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package v8go
// #include "v8go.h"
import "C"
import (
"unsafe"
)
// Function is a JavaScript function.
type Function struct {
*Value
}
// Call this JavaScript function with the given arguments.
func (fn *Function) Call(recv Valuer, args ...Valuer) (*Value, error) {
var argptr *C.ValuePtr
if len(args) > 0 {
var cArgs = make([]C.ValuePtr, len(args))
for i, arg := range args {
cArgs[i] = arg.value().ptr
}
argptr = (*C.ValuePtr)(unsafe.Pointer(&cArgs[0]))
}
rtn := C.FunctionCall(fn.ptr, recv.value().ptr, C.int(len(args)), argptr)
return valueResult(fn.ctx, rtn)
}
// Invoke a constructor function to create an object instance.
func (fn *Function) NewInstance(args ...Valuer) (*Object, error) {
var argptr *C.ValuePtr
if len(args) > 0 {
var cArgs = make([]C.ValuePtr, len(args))
for i, arg := range args {
cArgs[i] = arg.value().ptr
}
argptr = (*C.ValuePtr)(unsafe.Pointer(&cArgs[0]))
}
rtn := C.FunctionNewInstance(fn.ptr, C.int(len(args)), argptr)
return objectResult(fn.ctx, rtn)
}
// Return the source map url for a function.
func (fn *Function) SourceMapUrl() *Value {
ptr := C.FunctionSourceMapUrl(fn.ptr)
return &Value{ptr, fn.ctx}
}