http://llvm.org/bugs/show_bug.cgi?id=19751
Bug ID: 19751
Summary: rejects-valid if parenthesized temporary is
incremented, due to incorrect disambiguation
Product: clang
Version: unspecified
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: C++
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Classification: Unclassified
Clang incorrectly rejects this:
struct X { void operator++(int); };
void f() { (X())++; }
... because it believes the (X()) is a cast. I think this *only* goes wrong for
++ and --, where we need more than one token of lookahead past the
parenthesized type/expression.
When ParseCastExpression is called from the disambiguation code, it should call
the inner ParseCastExpression in the same disambiguation mode, and put its
token back if that call finds a non-cast-expression.
Amusingly, EDG and GCC have the same bug.
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