[Bug c++/38542] New: placement new and name lookup in templates

[wolfgang dot roehrl at gi-de dot com]

Dear all,

I would like to post a fault report for the GNU C/C++ compiler 4.3.0.

Used invokation line for the GNU C++ compiler:

gcc -c -x c++ -ansi -Wall -Werror -mcpu=603e -fverbose-asm -mbig
    -mmultiple -mstring -mstrict-align -meabi -msdata -fno-common
    -fno-exceptions -fno-rtti -O3 -fno-section-anchors
    -I<different include paths>
    -D<different #define's>
    X.CPP -oX.O


// example program

template <typename T_>
T_* g (void* p)
{ return new(p) T_(); }

void* operator new (unsigned int, void* p);

int* h (void* p)
{ return g<int>(p); }


GNU accepts the code frgment above which is illegal. It is illegal because
. the name "new" in the body of function g() is a non-dependent name and non-
  dependent names are bound at the point they are used (14.6.3);
. the new-expression in function g() is a placement-new-expression
. only non-placement allocation functions are declared implicitly (3.7.3/2).

BTW, the Comeau online compiler rejects the code above. 

Kind regards
W. Roehrl


-- 
           Summary: placement new and name lookup in templates
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: wolfgang dot roehrl at gi-de dot com
 GCC build triplet: athlon-redhat-linux
  GCC host triplet: i686-pc-mingw32
GCC target triplet: powerpc-rtems4.9


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38542