http://llvm.org/bugs/show_bug.cgi?id=11261
Summary: Compiler error when using "_Generic" identifier in C++
source code
Product: clang
Version: trunk
Platform: Macintosh
OS/Version: MacOS X
Status: NEW
Severity: normal
Priority: P
Component: C++
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected], [email protected]
When compiling code with clang++ 3.0 (as shipped with Apple XCode 4.2) that
contains _Generic, an error is raised, like this:
test.cc:5:6: error: expected unqualified-id
int _Generic = 0;
After some googling around, this seems to be related to the "C1X generic
selections" extension (see
http://clang.llvm.org/doxygen/classclang_1_1GenericSelectionExpr.html).
However, I could not find further information on this, and it is not clear to
me whether this is part of C++11, or of a future extension of the C++ standard.
If this error really is intentional behavior, then please change the warning to
something more helpful, like "_Generic is a C1X reserved keyword".
But personally I'd prefer if using _Generic was again made possible for code
that does not explicitly request C1X extensions, as "legacy code" is using
this.
For reference, this was with
Apple clang version 3.0 (tags/Apple/clang-211.10.1) (based on LLVM 3.0svn)
Target: x86_64-apple-darwin10.8.0
Thread model: posix
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