1  /* Descriptions of array-like objects.
       2     Copyright (C) 2019-2023 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;
      30    static const T *base (const T &x) { return &x; }
      31    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