salome_adm/unix/config_files/ac_cxx_partial_specialization.m4

   1 dnl @synopsis AC_CXX_PARTIAL_SPECIALIZATION
   2 dnl
   3 dnl If the compiler supports partial specialization,
   4 dnl define HAVE_PARTIAL_SPECIALIZATION.
   5 dnl
   6 dnl @version $Id$
   7 dnl @author Luc Maisonobe
   8 dnl
   9 AC_DEFUN(AC_CXX_PARTIAL_SPECIALIZATION,
  10 [AC_CACHE_CHECK(whether the compiler supports partial specialization,
  11 ac_cv_cxx_partial_specialization,
  12 [AC_LANG_SAVE
  13  AC_LANG_CPLUSPLUS
  14  AC_TRY_COMPILE([
  15 template<class T, int N> class A            { public : enum e { z = 0 }; };
  16 template<int N>          class A<double, N> { public : enum e { z = 1 }; };
  17 template<class T>        class A<T, 2>      { public : enum e { z = 2 }; };
  18 ],[return (A<int,3>::z == 0) && (A<double,3>::z == 1) && (A<float,2>::z == 2);],
  19  ac_cv_cxx_partial_specialization=yes, ac_cv_cxx_partial_specialization=no)
  20  AC_LANG_RESTORE
  21 ])
  22 if test "$ac_cv_cxx_partial_specialization" = yes; then
  23   AC_DEFINE(HAVE_PARTIAL_SPECIALIZATION,,
  24             [define if the compiler supports partial specialization])
  25 fi
  26 ])