文件操作 - ax_cxx_member_templates_outside_class.m4
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文件: /usr/share/aclocal/ax_cxx_member_templates_outside_class.m4
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# ========================================================================================== # https://www.gnu.org/software/autoconf-archive/ax_cxx_member_templates_outside_class.html # ========================================================================================== # # SYNOPSIS # # AX_CXX_MEMBER_TEMPLATES_OUTSIDE_CLASS # # DESCRIPTION # # If the compiler supports member templates outside the class declaration, # define HAVE_MEMBER_TEMPLATES_OUTSIDE_CLASS. # # 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 7 AU_ALIAS([AC_CXX_MEMBER_TEMPLATES_OUTSIDE_CLASS], [AX_CXX_MEMBER_TEMPLATES_OUTSIDE_CLASS]) AC_DEFUN([AX_CXX_MEMBER_TEMPLATES_OUTSIDE_CLASS], [AC_CACHE_CHECK(whether the compiler supports member templates outside the class declaration, ax_cv_cxx_member_templates_outside_class, [AC_LANG_SAVE AC_LANG_CPLUSPLUS AC_TRY_COMPILE([ template<class T, int N> class A { public : template<int N2> A<T,N> operator=(const A<T,N2>& z); }; template<class T, int N> template<int N2> A<T,N> A<T,N>::operator=(const A<T,N2>& z){ return A<T,N>(); }],[ A<double,4> x; A<double,7> y; x = y; return 0;], ax_cv_cxx_member_templates_outside_class=yes, ax_cv_cxx_member_templates_outside_class=no) AC_LANG_RESTORE ]) if test "$ax_cv_cxx_member_templates_outside_class" = yes; then AC_DEFINE(HAVE_MEMBER_TEMPLATES_OUTSIDE_CLASS,, [define if the compiler supports member templates outside the class declaration]) fi ])
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