http://llvm.org/bugs/show_bug.cgi?id=15563
Bug ID: 15563
Summary: Function types with different language linkages not
distinct
Product: clang
Version: unspecified
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: P
Component: C++
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Classification: Unclassified
Section 7.5.1 of C++98 and C++11 states:
Two function types with different language linkages are
distinct types even if they are otherwise identical.
If the types are distinct, then surely we can overload on that basis:
extern "C" typedef int (*CPtr)(void);
extern "C++" typedef int (*CxxPtr)(void);
int Klutz(CPtr f) { return f(); }
int Klutz(CxxPtr f) { return f(); }
This compiles cleanly with Sun and Cray C++ compilers, but not with Clang, GCC,
Intel, MSVC, IBM XL, PathScale, or PGI.
$ clang++ klutz.cc
klutz.cc:5:5: error: redefinition of 'Klutz'
int Klutz(CxxPtr f) { return f(); }
^
klutz.cc:4:5: note: previous definition is here
int Klutz(CPtr f) { return f(); }
^
1 error generated.
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