[macstl-dev] gcc 3.3 on YellowDogLinux

[Michael LeBlanc]

> About the cast, is the intent just to change type?  You don't want any 
> code generated, do you?

A simple cast compiles.  Here's the generated code code:

         lis 11,_ZZNK9generatorILj0EEclEvE2un at ha
         la 11,_ZZNK9generatorILj0EEclEvE2un at l(11)
         lis 9,zz at ha
         la 9,zz at l(9)
         lvx 0,0,11
         stvx 0,0,9

which is as simple as you can get.  More silliness.  On line 29 below, 
replace "VUC" by "(VUC)", a C-style cast, and it draws a parse error.

      1  #include <altivec.h>
      2
      3  #ifdef USE_TYPEDEF
      4    typedef __vector unsigned int VUT;
      5    typedef __vector unsigned char VUC;
      6  #endif
      7
      8  template <unsigned int v0> struct generator
      9      {
     10  #ifdef USE_TYPEDEF
     11      VUT
     12  #else
     13      __vector unsigned int
     14  #endif
     15      operator() () const
     16          {
     17          union union_type
     18              {
     19              unsigned int val [4];
     20              __vector unsigned int vec;
     21              };
     22          static const union_type un = {v0, v0, v0, v0};
     23          return un.vec;
     24          }
     25      };
     26
     27  __vector unsigned char zz =
     28  //  static_cast <VUC>
     29      VUC
     30      (generator <0> () ())
     31      ;