[LLVMbugs] [Bug 15853] New: __has_attribute does not parse C++11 namespaced attributes

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=15853

            Bug ID: 15853
           Summary: __has_attribute does not parse C++11 namespaced
                    attributes
           Product: clang
           Version: unspecified
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++11
          Assignee: unassignedclangbugs at nondot.org
          Reporter: arcata at gmail.com
                CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Testing for a namespaced attribute with __has_attribute gives a parse error:

////
#if __has_attribute(clang::fallthrough)
#warning "clang::fallthrough supported"
#endif
////

----
foo.cpp:1:5: error: builtin feature check macro requires a parenthesized
identifier
#if __has_attribute(clang::fallthrough)
    ^
foo.cpp:1:26: error: invalid token at start of a preprocessor expression
#if __has_attribute(clang::fallthrough)
----

Testing with the un-namespaced name works:

////
#if __has_attribute(fallthrough)
#warning "fallthrough supported...somewhere"
#endif
////

----
#if __has_attribute(fallthrough)
#warning "fallthrough supported...somewhere"
#endif
----

-- 
You are receiving this mail because:
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-bugs/attachments/20130426/ebe421f5/attachment.html>