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# =============================================================================================
# http://www.nongnu.org/autoconf-archive/ax_cxx_explicit_template_function_qualification.html
# =============================================================================================
#
# SYNOPSIS
#
# AX_CXX_EXPLICIT_TEMPLATE_FUNCTION_QUALIFICATION
#
# DESCRIPTION
#
# If the compiler supports explicit template function qualification,
# define HAVE_EXPLICIT_TEMPLATE_FUNCTION_QUALIFICATION.
#
# 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.
AC_DEFUN([AX_CXX_EXPLICIT_TEMPLATE_FUNCTION_QUALIFICATION],
[AC_CACHE_CHECK(whether the compiler supports explicit template function qualification,
ax_cv_cxx_explicit_template_function_qualification,
[AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_TRY_COMPILE([
template<class Z> class A { public : A() {} };
template<class X, class Y> A<X> to (const A<Y>&) { return A<X>(); }
],[A<float> x; A<double> y = to<double>(x); return 0;],
ax_cv_cxx_explicit_template_function_qualification=yes, ax_cv_cxx_explicit_template_function_qualification=no)
AC_LANG_RESTORE
])
if test "$ax_cv_cxx_explicit_template_function_qualification" = yes; then
AC_DEFINE(HAVE_EXPLICIT_TEMPLATE_FUNCTION_QUALIFICATION,,
[define if the compiler supports explicit template function qualification])
fi
])
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