[Bug libstdc++/39676] New: std::result_of doesn't work

[piotr dot wyderski at gmail dot com]

------------------8<------------------

#include <functional>


int fn(long, float) {

    return 0;
}


int main(int argc, char *argv[]) {

    typedef std::result_of<decltype(fn)>::type type;
    return 0;
}

------------------8<------------------

$ g++ -std=c++0x testcase.cpp
In file included from
/opt/gcc-4.4.0-trunk/lib/gcc/i686-pc-cygwin/4.4.0/include/
c++/functional:75,
                 from testcase.cpp:2:
/opt/gcc-4.4.0-trunk/lib/gcc/i686-pc-cygwin/4.4.0/include/c++/tr1_impl/functiona
l: In instantiation of 'std::_Result_of_impl<false, int ()(long int, float)>':
/opt/gcc-4.4.0-trunk/lib/gcc/i686-pc-cygwin/4.4.0/include/c++/tr1_impl/functiona
l:154:   instantiated from 'std::result_of<int ()(long int, float)>'
testcase.cpp:13:   instantiated from here
/opt/gcc-4.4.0-trunk/lib/gcc/i686-pc-cygwin/4.4.0/include/c++/tr1_impl/functiona
l:200: error: 'int' is not a class, struct, or union type

gcc used is:

$ gcc -v
Using built-in specs.
Target: i686-pc-cygwin
Configured with: ../configure --prefix=/opt/gcc-4.4.0-trunk -v
--enable-bootstra
p --enable-version-specific-runtime-libs --enable-static --enable-shared
--enabl
e-shared-libgcc --with-gnu-ld --with-gnu-as --enable-sjlj-exceptions
--enable-la
nguages=c,c++ --disable-symvers --enable-libjava --disable-nls
--with-cpu-32=cor
e2 --with-cpu-64=core2 --enable-threads=posix
Thread model: posix
gcc version 4.4.0 20090309 (experimental) (GCC)


-- 
           Summary: std::result_of doesn't work
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: piotr dot wyderski at gmail dot com
  GCC host triplet: WinXP/x86/Cygwin


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39676