[Bug c++/14250] New: switch() does not seem to see operator int() in template class

["savoiu at ics dot uci dot edu" <gcc-bugzilla at gcc dot gnu dot org>]

-- G++ INFO --------------------------------------------------------------------------------------- 
Reading specs from /root/gcc/lib/gcc/i686-pc-linux-gnu/3.5.0/specs 
Configured with: ../configure --prefix=/root/gcc --enable-languages=c++ 
Thread model: posix 
gcc version 3.5.0 20040222 (experimental) 
-- SOURCE CODE ------------------------------------------------------------------------------- 
#define USE_TEMPLATE 
 
#ifndef USE_TEMPLATE 
 #define T unsigned int 
#endif// USE_TEMPLATE 
 
#ifdef USE_TEMPLATE 
template <typename T> 
#endif// USE_TEMPLATE 
class O 
{ 
 T x; 
 public: 
 O(T _x=0) 
 { 
 } 
 
 O(const O& that) 
 { 
  x=that.x; 
 } 
 
 O& operator=(const O& that) 
 { 
  x=that.x; 
  return *this; 
 } 
 
 operator T() const 
 { 
  return x; 
 } 
}; 
 
#ifdef USE_TEMPLATE 
typedef O<unsigned int> MyO; 
#else //USE_TEMPLATE 
typedef O MyO; 
#endif //USE_TEMPLATE 
 
class C1 
{ 
 public: 
 static MyO t1; 
 
 class C2 
 { 
  public: 
  static MyO t2; 
 
  void fun() 
  { 
   switch(t2) 
   { 
    default: 
    break; 
   } 
 
   switch(C1::t1) 
   { 
    default: 
    break; 
   } 
  } 
 }; 
}; 
-- BUG INFO --------------------------------------------------------------------------------------- 
Given the code above and running just g++ with no command line parameters I get: 
 
[root@home temp]# g++ boog.cpp 
boog.cpp: In member function `void C1::C2::fun()': 
boog.cpp:53: error: switch quantity not an integer 
boog.cpp:59: error: switch quantity not an integer 
 
I expected g++ to see the 'operator T() const'. Note that if you comment out '#define 
USE_TEMPLATE' then the code compiles OK.  
 
This problem occurs on other versions of GCC as well (notably 3.3). 
 
Cheers, 
Nick

-- 
           Summary: switch() does not seem to see operator int() in template
                    class
           Product: gcc
           Version: 3.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: savoiu at ics dot uci dot edu
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14250