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# Check for standard iterator extension. This is modified from
# http://www.gnu.org/software/ac-archive/htmldoc/ac_cxx_have_ext_hash_set.html
AC_DEFUN([AC_CXX_HAVE_STD_ITERATOR],
[AC_CACHE_CHECK(whether the compiler has the standard iterator,
ac_cv_cxx_have_std_iterator,
[AC_REQUIRE([AC_CXX_NAMESPACES])
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_TRY_COMPILE([#include <iterator>
#ifdef HAVE_NAMESPACES
using namespace std;
#endif],[iterator<int,int,int> t; return 0;],
ac_cv_cxx_have_std_iterator=yes, ac_cv_cxx_have_std_iterator=no)
AC_LANG_RESTORE
])
HAVE_STD_ITERATOR=0
if test "$ac_cv_cxx_have_std_iterator" = yes
then
HAVE_STD_ITERATOR=1
fi
AC_SUBST(HAVE_STD_ITERATOR)])
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