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# =======================================================================================
# https://www.gnu.org/software/autoconf-archive/ax_cxx_function_nontype_parameters.html
# =======================================================================================
#
# SYNOPSIS
#
# AX_CXX_FUNCTION_NONTYPE_PARAMETERS
#
# DESCRIPTION
#
# If the compiler supports function templates with non-type parameters,
# define HAVE_FUNCTION_NONTYPE_PARAMETERS.
#
# 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 8
AU_ALIAS([AC_CXX_FUNCTION_NONTYPE_PARAMETERS], [AX_CXX_FUNCTION_NONTYPE_PARAMETERS])
AC_DEFUN([AX_CXX_FUNCTION_NONTYPE_PARAMETERS],
[AC_CACHE_CHECK(whether the compiler supports function templates with non-type parameters,
ax_cv_cxx_function_nontype_parameters,
[AC_LANG_PUSH([C++])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
template<class T, int N> class A {};
template<class T, int N> int f(const A<T,N>& x) { return 0; }
]], [[A<double, 17> z; return f(z);]])],
[ax_cv_cxx_function_nontype_parameters=yes], [ax_cv_cxx_function_nontype_parameters=no])
AC_LANG_POP([C++])
])
if test "$ax_cv_cxx_function_nontype_parameters" = yes; then
AC_DEFINE(HAVE_FUNCTION_NONTYPE_PARAMETERS,,
[define if the compiler supports function templates with non-type parameters])
fi
])
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