public static UnifiedExpression CreateUnaryExpression(XElement node)
{
Contract.Requires(node != null);
Contract.Requires(node.Name() == "unary_expression");
/*
* unary_expression
* : postfix_expression
| '++' unary_expression
| '--' unary_expression
| unary_operator cast_expression
| 'sizeof' unary_expression
| 'sizeof' '(' type_name ')'
*/
var first = node.FirstElement();
if (first.Name == "postfix_expression")
{
return
(CreatePostfixExpression(
node.Element("postfix_expression")));
}
if (first.Value == "sizeof")
{
var expression = node.NthElement(1).Name == "unary_expression" ?
CreateUnaryExpression
(
node
.
NthElement
(
1))
: CreateTypeName(node.NthElement(2));
UnifiedSizeof.Create(expression);
}
if (first.Name == "unary_operator")
{
return(UnifiedProgramGeneratorHelper.CreatePrefixUnaryExpression
(
node, CreateCastExpression,
Sign2PrefixUnaryOperator));
}
return(UnifiedProgramGeneratorHelper.CreatePrefixUnaryExpression(
node, CreateUnaryExpression, Sign2PrefixUnaryOperator));
}
public UnifiedElement VisitSizeOfExpression(
SizeOfExpression sizeOfExpression, object data)
{
return(UnifiedSizeof.Create(sizeOfExpression.Type.TryAcceptForExpression(this)));
}