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# ============================================================================================
# http://www.gnu.org/software/autoconf-archive/ax_cxx_template_scoped_argument_matching.html
# ============================================================================================
#
# SYNOPSIS
#
# AX_CXX_TEMPLATE_SCOPED_ARGUMENT_MATCHING
#
# DESCRIPTION
#
# If the compiler supports function matching with argument types which are
# template scope-qualified, define HAVE_TEMPLATE_SCOPED_ARGUMENT_MATCHING.
#
# LICENSE
#
# Copyright (c) 2008 Todd Veldhuizen
# Copyright (c) 2008 Luc Maisonobe <luc@spaceroots.org>
#
# Copying and distribution of this file, with or without modification, are
# permitted in any medium without royalty provided the copyright notice
# and this notice are preserved. This file is offered as-is, without any
# warranty.
#serial 6
AU_ALIAS([AC_CXX_TEMPLATE_SCOPED_ARGUMENT_MATCHING], [AX_CXX_TEMPLATE_SCOPED_ARGUMENT_MATCHING])
AC_DEFUN([AX_CXX_TEMPLATE_SCOPED_ARGUMENT_MATCHING],
[AC_CACHE_CHECK(whether the compiler supports function matching with argument types which are template scope-qualified,
ax_cv_cxx_template_scoped_argument_matching,
[AC_REQUIRE([AX_CXX_TYPENAME])
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_TRY_COMPILE([
#ifndef HAVE_TYPENAME
#define typename
#endif
template<class X> class A { public : typedef X W; };
template<class Y> class B {};
template<class Y> void operator+(B<Y> d1, typename Y::W d2) {}
],[B<A<float> > z; z + 0.5f; return 0;],
ax_cv_cxx_template_scoped_argument_matching=yes, ax_cv_cxx_template_scoped_argument_matching=no)
AC_LANG_RESTORE
])
if test "$ax_cv_cxx_template_scoped_argument_matching" = yes; then
AC_DEFINE(HAVE_TEMPLATE_SCOPED_ARGUMENT_MATCHING,,
[define if the compiler supports function matching with argument types which are template scope-qualified])
fi
])
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