1 /* Descriptions of array-like objects. 2 Copyright (C) 2019-2021 Free Software Foundation, Inc. 3 4 This file is part of GCC. 5 6 GCC is free software; you can redistribute it and/or modify it under 7 the terms of the GNU General Public License as published by the Free 8 Software Foundation; either version 3, or (at your option) any later 9 version. 10 11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY 12 WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GCC; see the file COPYING3. If not see 18 <http://www.gnu.org/licenses/>. */ 19 20 #ifndef GCC_ARRAY_TRAITS_H 21 #define GCC_ARRAY_TRAITS_H 22 23 /* Implementation for single integers (and similar types). */ 24 template<typename T, T zero = T (0)> 25 struct scalar_array_traits 26 { 27 typedef T element_type; 28 static const bool has_constant_size = true; 29 static const size_t constant_size = 1; basescalar_array_traits30 static const T *base (const T &x) { return &x; } sizescalar_array_traits31 static size_t size (const T &) { return 1; } 32 }; 33 34 template<typename T> 35 struct array_traits : scalar_array_traits<T> {}; 36 37 /* Implementation for arrays with a static size. */ 38 template<typename T, size_t N> 39 struct array_traits<T[N]> 40 { 41 typedef T element_type; 42 static const bool has_constant_size = true; 43 static const size_t constant_size = N; 44 static const T *base (const T (&x)[N]) { return x; } 45 static size_t size (const T (&)[N]) { return N; } 46 }; 47 48 #endif 49