/// <summary>
/// http://www.ecma-international.org/ecma-262/5.1/#sec-13.2.1
/// </summary>
public override JsValue Call(JsValue thisArg, JsValue[] arguments)
{
var strict = Strict || _engine._isStrict;
using (new StrictModeScope(strict, true))
{
var localEnv = LexicalEnvironment.NewFunctionEnvironment(_engine, this, Undefined);
_engine.EnterExecutionContext(localEnv, localEnv);
try
{
_engine.FunctionDeclarationInstantiation(
functionInstance: this,
arguments,
localEnv);
var result = _function.Execute();
var value = result.GetValueOrDefault().Clone();
if (result.Type == CompletionType.Throw)
{
ExceptionHelper.ThrowJavaScriptException(_engine, value, result);
}
if (result.Type == CompletionType.Return)
{
return(value);
}
}
finally
{
_engine.LeaveExecutionContext();
}
return(Undefined);
}
}
/// <summary>
/// https://tc39.es/ecma262/#sec-ecmascript-function-objects-call-thisargument-argumentslist
/// </summary>
public override JsValue Call(JsValue thisArgument, JsValue[] arguments)
{
// ** PrepareForOrdinaryCall **
// var callerContext = _engine.ExecutionContext;
// Let calleeRealm be F.[[Realm]].
// Set the Realm of calleeContext to calleeRealm.
// Set the ScriptOrModule of calleeContext to F.[[ScriptOrModule]].
var localEnv = LexicalEnvironment.NewFunctionEnvironment(_engine, this, Undefined);
// If callerContext is not already suspended, suspend callerContext.
// Push calleeContext onto the execution context stack; calleeContext is now the running execution context.
// NOTE: Any exception objects produced after this point are associated with calleeRealm.
// Return calleeContext.
_engine.EnterExecutionContext(localEnv, localEnv);
// ** OrdinaryCallBindThis **
JsValue thisValue;
if (_thisMode == FunctionThisMode.Strict)
{
thisValue = thisArgument;
}
else
{
if (thisArgument.IsNullOrUndefined())
{
var globalEnv = _engine.GlobalEnvironment;
var globalEnvRec = (GlobalEnvironmentRecord)globalEnv._record;
thisValue = globalEnvRec.GlobalThisValue;
}
else
{
thisValue = TypeConverter.ToObject(_engine, thisArgument);
}
}
var envRec = (FunctionEnvironmentRecord)localEnv._record;
envRec.BindThisValue(thisValue);
// actual call
var strict = _thisMode == FunctionThisMode.Strict || _engine._isStrict;
using (new StrictModeScope(strict, true))
{
try
{
var argumentsInstance = _engine.FunctionDeclarationInstantiation(
functionInstance: this,
arguments,
localEnv);
var result = _function.Execute();
var value = result.GetValueOrDefault().Clone();
argumentsInstance?.FunctionWasCalled();
if (result.Type == CompletionType.Throw)
{
ExceptionHelper.ThrowJavaScriptException(_engine, value, result);
}
if (result.Type == CompletionType.Return)
{
return(value);
}
}
finally
{
_engine.LeaveExecutionContext();
}
return(Undefined);
}
}
