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# ===========================================================================
# http://autoconf-archive.cryp.to/ac_cxx_default_template_parameters.html
# ===========================================================================
#
# SYNOPSIS
#
# AC_CXX_DEFAULT_TEMPLATE_PARAMETERS
#
# DESCRIPTION
#
# If the compiler supports default template parameters, define
# HAVE_DEFAULT_TEMPLATE_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.
AC_DEFUN([AC_CXX_DEFAULT_TEMPLATE_PARAMETERS],
[AC_CACHE_CHECK(whether the compiler supports default template parameters,
ac_cv_cxx_default_template_parameters,
[AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_TRY_COMPILE([
template<class T = double, int N = 10> class A {public: int f() {return 0;}};
],[A<float> a; return a.f();],
ac_cv_cxx_default_template_parameters=yes, ac_cv_cxx_default_template_parameters=no)
AC_LANG_RESTORE
])
if test "$ac_cv_cxx_default_template_parameters" = yes; then
AC_DEFINE(HAVE_DEFAULT_TEMPLATE_PARAMETERS,,
[define if the compiler supports default template parameters])
fi
])
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