public virtual object VisitCastExpression(UnaryCastExpression castExpression, object data)
{
stackMap.Push(castExpression);
castExpression.Child.AcceptVisitor(this, data);
castExpression.Type.AcceptVisitor(this, data);
stackMap.Pop();
return(null);
}
private ExpressionNode ParseCastOrGroup()
{
// cast-expression: (type) unary-expression
// parenthesized-expression: (expression)
ExpressionNode interior = ParseExpressionOrType(false);
AssertAndAdvance(TokenID.RParen);
if (ConsiderAsCast(interior))
{
UnaryCastExpression castNode = new UnaryCastExpression(curtok);
castNode.Type = (IType)interior;
castNode.Child = ParseSubexpression(PRECEDENCE_UNARY);
return castNode;
}
else
return new ParenthesizedExpression(interior);
}
private void ParseCastOrGroup()
{
ExpressionNode interior = ParseExpression();
AssertAndAdvance(TokenID.RParen);
TokenID rightTok = curtok.ID;
// check if this is terminating - need better algorithm here :(
// todo: this can probably be simplified (and correctified!) with new expression parsing style
if (!(interior is IType) ||
rightTok == TokenID.Semi ||
rightTok == TokenID.RParen ||
rightTok == TokenID.RCurly ||
rightTok == TokenID.RBracket ||
rightTok == TokenID.Comma)
{
// was group for sure
exprStack.Push(new ParenthesizedExpression(interior ));
ParseContinuingPrimary();
}
else
{
// push a pe just in case upcoming is binary expr
ParenthesizedExpression pe = new ParenthesizedExpression(curtok);
exprStack.Push(pe);
// find out what is on right
ParseExpressionSegment();
ExpressionNode peek = exprStack.Peek();
if (peek is PrimaryExpression || peek is UnaryExpression)
{
// cast
UnaryCastExpression castNode = new UnaryCastExpression(curtok);
castNode.Type = (IType)interior;
castNode.Child = exprStack.Pop();
// need to pop off the 'just in case' pe
exprStack.Pop();
exprStack.Push(castNode);
}
else
{
// group
pe.Expression = interior;
ParseContinuingPrimary();
}
}
}
public virtual object VisitCastExpression(UnaryCastExpression castExpression, object data)
{
stackMap.Push(castExpression);
castExpression.Child.AcceptVisitor(this, data);
castExpression.Type.AcceptVisitor(this, data);
stackMap.Pop();
return null;
}