https://gcc.gnu.org/bugzilla/show_bug.cgi?id=72760
Bug ID: 72760
Summary: incorrectly rejects valid C++ code that invokes
__typeof__ on a specialized template function
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: su at cs dot ucdavis.edu
Target Milestone: ---
The code is accepted by both Clang and ICC. It is rejected by all versions of
GCC since at least as early as 4.4.x.
$ g++-trunk -v
Using built-in specs.
COLLECT_GCC=g++-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/7.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/usr/local/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 7.0.0 20160730 (experimental) [trunk revision 238903] (GCC)
$
$ clang++-3.8 -c small.cpp
$
$ g++-trunk -c small.cpp
small.cpp:3:22: error: type of ‘f<int>’ is unknown
__typeof__ (f < int >) a;
^
$
------------------------------------
template < typename T > T f (T x);
__typeof__ (f < int >) a;
