internal static JsValue AssignToIdentifier(
Engine engine,
JintIdentifierExpression left,
JintExpression right,
bool hasEvalOrArguments)
{
var env = engine.ExecutionContext.LexicalEnvironment;
var strict = StrictModeScope.IsStrictModeCode;
if (LexicalEnvironment.TryGetIdentifierEnvironmentWithBindingValue(
env,
left._expressionName,
strict,
out var environmentRecord,
out _))
{
if (strict && hasEvalOrArguments)
{
ExceptionHelper.ThrowSyntaxError(engine);
}
var rval = right.GetValue().Clone();
if (right._expression.IsFunctionWithName())
{
((FunctionInstance)rval).SetFunctionName(left._expressionName.StringValue);
}
environmentRecord.SetMutableBinding(left._expressionName, rval, strict);
return(rval);
}
return(null);
}
protected override void Initialize()
{
var assignmentExpression = ((AssignmentExpression)_expression);
_left = Build(_engine, assignmentExpression.Left);
_leftIdentifier = _left as JintIdentifierExpression;
_evalOrArguments = _leftIdentifier?.HasEvalOrArguments == true;
_right = Build(_engine, assignmentExpression.Right);
}
protected override void Initialize()
{
var expression = (MemberExpression)_expression;
_objectExpression = Build(_engine, expression.Object);
_objectIdentifierExpression = _objectExpression as JintIdentifierExpression;
_objectThisExpression = _objectExpression as JintThisExpression;
if (!expression.Computed)
{
_determinedProperty = ((Identifier)expression.Property).Name;
}
else if (expression.Property.Type == Nodes.Literal)
{
_determinedProperty = JintLiteralExpression.ConvertToJsValue((Literal)expression.Property);
}
if (_determinedProperty is null)
{
_propertyExpression = Build(_engine, expression.Property);
}
}
protected override void Initialize()
{
var expression = (UpdateExpression)_expression;
_prefix = expression.Prefix;
_argument = Build(_engine, expression.Argument);
if (expression.Operator == UnaryOperator.Increment)
{
_change = 1;
}
else if (expression.Operator == UnaryOperator.Decrement)
{
_change = -1;
}
else
{
ExceptionHelper.ThrowArgumentException();
}
_leftIdentifier = _argument as JintIdentifierExpression;
_evalOrArguments = _leftIdentifier?.HasEvalOrArguments == true;
}
internal static ExpressionResult?AssignToIdentifier(
EvaluationContext context,
JintIdentifierExpression left,
JintExpression right,
bool hasEvalOrArguments)
{
var engine = context.Engine;
var env = engine.ExecutionContext.LexicalEnvironment;
var strict = StrictModeScope.IsStrictModeCode;
if (JintEnvironment.TryGetIdentifierEnvironmentWithBinding(
env,
left._expressionName,
out var environmentRecord))
{
if (strict && hasEvalOrArguments)
{
ExceptionHelper.ThrowSyntaxError(engine.Realm);
}
var completion = right.GetValue(context);
if (completion.IsAbrupt())
{
return(completion);
}
var rval = completion.Value.Clone();
if (right._expression.IsFunctionDefinition())
{
((FunctionInstance)rval).SetFunctionName(left._expressionName.StringValue);
}
environmentRecord.SetMutableBinding(left._expressionName, rval, strict);
return(new Completion(CompletionType.Normal, rval, default));
}
return(null);
}
