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文件: /usr/share/aclocal/ax_cxx_partial_specialization.m4
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# ================================================================================== # https://www.gnu.org/software/autoconf-archive/ax_cxx_partial_specialization.html # ================================================================================== # # SYNOPSIS # # AX_CXX_PARTIAL_SPECIALIZATION # # DESCRIPTION # # If the compiler supports partial specialization, define # HAVE_PARTIAL_SPECIALIZATION. # # 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_PARTIAL_SPECIALIZATION], [AX_CXX_PARTIAL_SPECIALIZATION]) AC_DEFUN([AX_CXX_PARTIAL_SPECIALIZATION], [AC_CACHE_CHECK(whether the compiler supports partial specialization, ax_cv_cxx_partial_specialization, [AC_LANG_SAVE AC_LANG_CPLUSPLUS AC_TRY_COMPILE([ template<class T, int N> class A { public : enum e { z = 0 }; }; template<int N> class A<double, N> { public : enum e { z = 1 }; }; template<class T> class A<T, 2> { public : enum e { z = 2 }; }; ],[return (A<int,3>::z == 0) && (A<double,3>::z == 1) && (A<float,2>::z == 2);], ax_cv_cxx_partial_specialization=yes, ax_cv_cxx_partial_specialization=no) AC_LANG_RESTORE ]) if test "$ax_cv_cxx_partial_specialization" = yes; then AC_DEFINE(HAVE_PARTIAL_SPECIALIZATION,, [define if the compiler supports partial specialization]) fi ])
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