mirror of https://gitee.com/openkylin/glib2.0.git
48 lines
1.7 KiB
C++
48 lines
1.7 KiB
C++
/* GLIB - Library of useful routines for C programming
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* Copyright (C) 2021 Iain Lane, Xavier Claessens
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __GLIB_TYPEOF_H__
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#define __GLIB_TYPEOF_H__
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#if !defined (__GLIB_H_INSIDE__) && !defined (GLIB_COMPILATION)
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#error "Only <glib.h> can be included directly."
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#endif
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#include <glib/gversionmacros.h>
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/*
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* We can only use __typeof__ on GCC >= 4.8, and not when compiling C++. Since
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* __typeof__ is used in a few places in GLib, provide a pre-processor symbol
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* to factor the check out from callers.
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*
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* This symbol is private.
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*/
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#undef glib_typeof
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#if !G_CXX_STD_CHECK_VERSION (11) && \
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(G_GNUC_CHECK_VERSION(4, 8) || defined(__clang__))
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#define glib_typeof(t) __typeof__ (t)
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#elif G_CXX_STD_CHECK_VERSION (11) && \
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GLIB_VERSION_MIN_REQUIRED >= GLIB_VERSION_2_68
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/* C++11 decltype() is close enough for our usage */
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#include <type_traits>
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#define glib_typeof(t) typename std::remove_reference<decltype (t)>::type
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#endif
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#endif /* __GLIB_TYPEOF_H__ */
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