[Bug pending/16313] New: Function's address automatically taken

[Bug pending/16313] New: Function's address automatically taken

[gcc-bugzilla at gcc dot gnu dot org]

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NOTE: Defaulting component because reported component no longer exists

Consider the following piece of code:

void foo (){}

template < typename T >
void
bar (const T &arg)
{
  (void) arg;
}

int
main ()
{
  bar (foo);
}

G++ 3.3, 3.4, and ICC 7.1 consider it invalid: bar (foo) must be
written bar (&foo).  Nevertheless 3.5 accepts it.  I'm tempted to say
this piece of code is invalid, but IANALL :)

Environment:
System: Linux nostromo 2.4.25 #2 Mon Mar 15 12:03:26 CET 2004 i686 GNU/Linux
Architecture: i686

	
host: i486-pc-linux-gnu
build: i486-pc-linux-gnu
target: i486-pc-linux-gnu
configured with: ../src/configure -v --enable-languages=c,c++,java,f95,objc --prefix=/usr/lib/gcc-snapshot --enable-shared --with-system-zlib --enable-nls --enable-threads=posix --without-included-gettext --disable-werror --enable-__cxa_atexit --enable-clocale=gnu --enable-libstdcxx-debug --enable-java-gc=boehm --enable-java-awt=gtk i486-linux-gnu

How-To-Repeat:

~/tmp % icc foo.cc
foo.cc(18): error: no instance of function template "bar" matches the argument list
            argument types are: (void ())
    bar (foo);
    ^

compilation aborted for foo.cc (code 2)
~/tmp % g++-3.4 foo.cc
foo.cc: In function `int main()':
foo.cc:18: error: pas de fonction concordante pour l'appel de «bar(void (&)())»
~/tmp % g++-3.5 foo.cc
~/tmp %

-- 
           Summary: Function's address automatically taken
           Product: gcc
           Version: 3.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: pending
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: akim at lrde dot epita dot fr
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i486-pc-linux-gnu
  GCC host triplet: i486-pc-linux-gnu
GCC target triplet: i486-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16313

[Bug c++/16313] Function's address automatically taken

[reichelt at gcc dot gnu dot org]

------- Additional Comments From reichelt at gcc dot gnu dot org  2004-07-01 11:46 -------
Your code is valid, so mainline's behavior is correct.
GCC 3.4.1 will also accept it.

An explanation and the patches that fixed the compiler can be found
in PR 3518.

Btw, your code is accepted by gcc 2.95.x, rejected by gcc 3.0.x,
again accepted by gcc 3.1 - 3.2.1, again rejected by gcc 3.2.2 - 3.4.0,
and (hopefully) finally accepted by 3.4.1 and later. ICC 8.0 also accepts
the code.


-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
          Component|pending                     |c++
         Resolution|                            |INVALID


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16313