[macstl-dev] gcc 3.3 on YellowDogLinux

[Michael LeBlanc]

On Mar 24, 2005, at 7:47 PM, Glen Low wrote:

> Try declaring the typedefs outside of a class. I sometimes find gcc is 
> a little silly about its C extensions scoped within a C++ class (e.g. 
> I tried the no_alias attribute but it caused ICE's and other 
> unpleasantness if used in a typedef scoped within a C++ class). Try 
> within a namespace (stdext::impl) first, and if that fails, declare 
> them at global scope.

Silly is right!  I'll try inside namespaces shortly.  About the cast, 
is the intent just to change type?  You don't want any code generated, 
do you?

~/valarray]$ cat -n y.cpp
      1  #include <altivec.h>
      2
      3  #ifdef USE_TYPEDEF
      4    typedef __vector unsigned int VUT;
      5  #endif
      6
      7  template <unsigned int v0> struct generator
      8      {
      9  #ifdef USE_TYPEDEF
     10      VUT
     11  #else
     12      __vector unsigned int
     13  #endif
     14      operator() () const
     15          {
     16          union union_type
     17              {
     18              unsigned int val [4];
     19              __vector unsigned int vec;
     20              };
     21          static const union_type un = {v0, v0, v0, v0};
     22          return un.vec;
     23          }
     24      };
     25
     26  __vector unsigned char zz =
     27      static_cast <__vector unsigned char>
     28      (generator <0> () ())
     29      ;
     30

$ gcc -c y.cpp -DUSE_TYPEDEF
y.cpp:28: error: invalid static_cast from type `vector unsigned int' to 
type `
    vector unsigned char'