[LLVMbugs] [Bug 18443] New: [ms-compatibility] Recover better from missing 'typename' in sizeof
bugzilla-daemon at llvm.org
bugzilla-daemon at llvm.org
Fri Jan 10 21:42:01 PST 2014
http://llvm.org/bugs/show_bug.cgi?id=18443
Bug ID: 18443
Summary: [ms-compatibility] Recover better from missing
'typename' in sizeof
Product: clang
Version: trunk
Hardware: PC
OS: Windows XP
Status: NEW
Severity: normal
Priority: P
Component: -New Bugs
Assignee: unassignedclangbugs at nondot.org
Reporter: richard-llvm at metafoo.co.uk
CC: llvmbugs at cs.uiuc.edu, rnk at google.com
Classification: Unclassified
Consider:
struct X { typedef int type; };
template<typename T> void f() { sizeof(T::type); }
template void f<X>();
Clang diagnoses this as:
<stdin>:2:43: error: unexpected type name 'type': expected expression
template<typename T> void f() { sizeof(T::type); }
^
<stdin>:3:15: note: in instantiation of function template specialization 'f<X>'
requested here
template void f<X>();
^
... but this sort of thing apparently happens inside MS system headers. We
should support this case of missing 'typename' more elegantly -- perhaps we can
teach TreeTransform to cope with this during instantiation.
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