public Env updateFuncEnv(JsObject[] parameters)
{
(args.Length >= parameters.Length).OrThrows("参数太多");
Env env1 = new Env(this.env);
for (int i = 0; i < parameters.Length; i++)
{
env1.AddDef(this.args[i], parameters[i]);
}
return(env1);
}
public static JsObject EvalFunction(JsExpression x, Env env)
{
if (x.child.Count == 3)
{
string[] args = x.child[1].child.Select(i => i.value).ToArray();
JsFunction func = new JsFunction(args, x.child[2], new Env(env));
return(env.AddDef(x.child[0].value, func));
}
else
{
string[] args = x.child[0].child.Select(i => i.value).ToArray();
JsFunction func = new JsFunction(args, x.child[1], new Env(env));
return(func);
}
}
public JsObject evaluate(Env env)
{
JsExpression x = this.value == "" ? this.child[0] : this;
if (x.child.Count == 0)
{
return(CoreInterpreter.EvalSingleExpression(x, env));
}
else
{
if (x.value == "if")//考虑if内部变量作用域问题！！！Lexical Scope
{
return(CoreInterpreter.EvalIf(x, env));
}
else if (x.value == ".")
{
return(CoreInterpreter.EvalPointExpression(x, env));
}
else if (x.value == "while")
{
return(CoreInterpreter.EvalWhile(x, env));
}
else if (x.value == "return")
{
return(x.child[0].evaluate(env));
}
else if (x.value == "new")//build-in
{
return(x.child[0].evaluate(env));
}
else if (x.value == "var")//=
{
return(x.child[0].evaluate(env));
}
else if (x.value == "=")
{
return(env.AddDef(x.child[0].value, x.child[1].evaluate(env)));
}
else if (x.value == "function")
{
return(CoreInterpreter.EvalFunction(x, env));
}
// 添加一种类型 dict !!! x.value == "dict"
// 添加数组类型 list !!! x.value == "list"
//else if (x.value == "list")
//{
// return new LList(this.child.Skip(1).Select(item => item.evaluate(env)));
//}
else if (x.value == "{")
{
return(CoreInterpreter.EvalBlock(x, env));
}
else if (Env.builtins.ContainsKey(x.value))
{
return(CoreInterpreter.EvalBuiltIn(x, env));
}
else
{
//匿名函数和自定义函数调用
return(CoreInterpreter.EvalFunctionInvoke(x, env));
}
}
}
public JsObject AddDef(string name, JsObject obj)
{
scope.AddDef(name, obj);
return(obj);
}