ottoGo Go 中的 JS 解释器 项目简介
otto 是 用原生 Go 编写的 JavaScript 解析器和解释器。import (
"github.com/robertkrimen/otto"
)在 VM 中运行vm := otto.New()
vm.Run(`
abc = 2 + 2;
console.log("The value of abc is " + abc); // 4
`)获取 VM 外的值if value, err := vm.Get("abc"); err == nil {
if value_int, err := value.ToInteger(); err == nil {
fmt.Printf("", value_int, err)
}
}设置数字vm.Set("def", 11)
vm.Run(`
console.log("The value of def is " + def);
// The value of def is 11
`)设置字符串vm.Set("xyzzy", "Nothing happens.")
vm.Run(`
console.log(xyzzy.length); // 16
`)获取表达式的值value, _ = vm.Run("xyzzy.length")
{
// value is an int64 with a value of 16
value, _ := value.ToInteger()
}抛出错误value, err = vm.Run("abcdefghijlmnopqrstuvwxyz.length")
if err != nil {
// err = ReferenceError: abcdefghijlmnopqrstuvwxyz is not defined
// If there is an error, then value.IsUndefined() is true
...
}设置 Go 函数vm.Set("sayHello", func(call otto.FunctionCall) otto.Value {
fmt.Printf("Hello, %s.\n", call.Argument(0).String())
return otto.Value{}
})在 JS 中使用函数result, _ = vm.Run(`
sayHello("Xyzzy"); // Hello, Xyzzy.
sayHello(); // Hello, undefined
result = twoPlus(2.0); // 4
`)
"github.com/robertkrimen/otto"
)在 VM 中运行vm := otto.New()
vm.Run(`
abc = 2 + 2;
console.log("The value of abc is " + abc); // 4
`)获取 VM 外的值if value, err := vm.Get("abc"); err == nil {
if value_int, err := value.ToInteger(); err == nil {
fmt.Printf("", value_int, err)
}
}设置数字vm.Set("def", 11)
vm.Run(`
console.log("The value of def is " + def);
// The value of def is 11
`)设置字符串vm.Set("xyzzy", "Nothing happens.")
vm.Run(`
console.log(xyzzy.length); // 16
`)获取表达式的值value, _ = vm.Run("xyzzy.length")
{
// value is an int64 with a value of 16
value, _ := value.ToInteger()
}抛出错误value, err = vm.Run("abcdefghijlmnopqrstuvwxyz.length")
if err != nil {
// err = ReferenceError: abcdefghijlmnopqrstuvwxyz is not defined
// If there is an error, then value.IsUndefined() is true
...
}设置 Go 函数vm.Set("sayHello", func(call otto.FunctionCall) otto.Value {
fmt.Printf("Hello, %s.\n", call.Argument(0).String())
return otto.Value{}
})在 JS 中使用函数result, _ = vm.Run(`
sayHello("Xyzzy"); // Hello, Xyzzy.
sayHello(); // Hello, undefined
result = twoPlus(2.0); // 4
`)