| 1 | /* GLIB - Library of useful routines for C programming |
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| 2 | * Copyright (C) 2021 Iain Lane, Xavier Claessens |
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| 3 | * |
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| 4 | * This library is free software; you can redistribute it and/or |
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| 5 | * modify it under the terms of the GNU Lesser General Public |
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| 6 | * License as published by the Free Software Foundation; either |
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| 7 | * version 2.1 of the License, or (at your option) any later version. |
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| 8 | * |
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| 9 | * This library is distributed in the hope that it will be useful, |
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| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 12 | * Lesser General Public License for more details. |
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| 13 | * |
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| 14 | * You should have received a copy of the GNU Lesser General Public |
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| 15 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
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| 16 | */ |
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| 17 | |
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| 18 | #ifndef __GLIB_TYPEOF_H__ |
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| 19 | #define __GLIB_TYPEOF_H__ |
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| 20 | |
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| 21 | #if !defined (__GLIB_H_INSIDE__) && !defined (GLIB_COMPILATION) |
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| 22 | #error "Only <glib.h> can be included directly." |
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| 23 | #endif |
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| 24 | |
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| 25 | #include <glib/gversionmacros.h> |
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| 26 | |
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| 27 | /* |
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| 28 | * We can only use __typeof__ on GCC >= 4.8, and not when compiling C++. Since |
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| 29 | * __typeof__ is used in a few places in GLib, provide a pre-processor symbol |
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| 30 | * to factor the check out from callers. |
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| 31 | * |
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| 32 | * This symbol is private. |
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| 33 | */ |
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| 34 | #undef glib_typeof |
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| 35 | #if !defined(__cplusplus) && (G_GNUC_CHECK_VERSION(4, 8) || defined(__clang__)) |
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| 36 | #define glib_typeof(t) __typeof__ (t) |
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| 37 | #elif defined(__cplusplus) && __cplusplus >= 201103L && GLIB_VERSION_MIN_REQUIRED >= GLIB_VERSION_2_68 |
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| 38 | /* C++11 decltype() is close enough for our usage */ |
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| 39 | #include <type_traits> |
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| 40 | #define glib_typeof(t) typename std::remove_reference<decltype (t)>::type |
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| 41 | #endif |
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| 42 | |
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| 43 | #endif /* __GLIB_TYPEOF_H__ */ |
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| 44 | |
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