public JsValue EvaluateAssignmentExpression(AssignmentExpression assignmentExpression) { JsValue rval = _engine.GetValue(EvaluateExpression(assignmentExpression.Right)); var lref = EvaluateExpression(assignmentExpression.Left) as Reference; if (lref == null) { throw new JavaScriptException(_engine.ReferenceError); } if (assignmentExpression.Operator == AssignmentOperator.Assign) // "=" { if(lref.IsStrict() && lref.GetBase().TryCast<EnvironmentRecord>() != null && (lref.GetReferencedName() == "eval" || lref.GetReferencedName() == "arguments")) { throw new JavaScriptException(_engine.SyntaxError); } _engine.PutValue(lref, rval); return rval; } JsValue lval = _engine.GetValue(lref); switch (assignmentExpression.Operator) { case AssignmentOperator.PlusAssign: var lprim = TypeConverter.ToPrimitive(lval); var rprim = TypeConverter.ToPrimitive(rval); if (lprim.IsString() || rprim.IsString()) { lval = TypeConverter.ToString(lprim) + TypeConverter.ToString(rprim); } else { lval = TypeConverter.ToNumber(lprim) + TypeConverter.ToNumber(rprim); } break; case AssignmentOperator.MinusAssign: lval = TypeConverter.ToNumber(lval) - TypeConverter.ToNumber(rval); break; case AssignmentOperator.TimesAssign: if (lval == Undefined.Instance || rval == Undefined.Instance) { lval = Undefined.Instance; } else { lval = TypeConverter.ToNumber(lval) * TypeConverter.ToNumber(rval); } break; case AssignmentOperator.DivideAssign: lval = Divide(lval, rval); break; case AssignmentOperator.ModuloAssign: if (lval == Undefined.Instance || rval == Undefined.Instance) { lval = Undefined.Instance; } else { lval = TypeConverter.ToNumber(lval) % TypeConverter.ToNumber(rval); } break; case AssignmentOperator.BitwiseAndAssign: lval = TypeConverter.ToInt32(lval) & TypeConverter.ToInt32(rval); break; case AssignmentOperator.BitwiseOrAssign: lval = TypeConverter.ToInt32(lval) | TypeConverter.ToInt32(rval); break; case AssignmentOperator.BitwiseXOrAssign: lval = TypeConverter.ToInt32(lval) ^ TypeConverter.ToInt32(rval); break; case AssignmentOperator.LeftShiftAssign: lval = TypeConverter.ToInt32(lval) << (int)(TypeConverter.ToUint32(rval) & 0x1F); break; case AssignmentOperator.RightShiftAssign: lval = TypeConverter.ToInt32(lval) >> (int)(TypeConverter.ToUint32(rval) & 0x1F); break; case AssignmentOperator.UnsignedRightShiftAssign: lval = (uint)TypeConverter.ToInt32(lval) >> (int)(TypeConverter.ToUint32(rval) & 0x1F); break; default: throw new NotImplementedException(); } _engine.PutValue(lref, lval); return lval; }
public ExpressionContext(JScriptBuilder builder, AssignmentExpression e) : this(builder) { _op = OperatorInfo.Assignment; Enter(); }
private void EmitAssignmentExpression(AssignmentExpression e) { using (var ec = new ExpressionContext(this, e)) { Emit(e.Left); Write(" " + TranslateAssignmentOperator(e.Operator) + " "); Emit(e.Right); } }