gcc/make-unique.h

   1 /* Minimal implementation of make_unique for C++11 compatibility.
   2    Copyright (C) 2022-2023 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_MAKE_UNIQUE
  21 #define GCC_MAKE_UNIQUE
  22
  23 /* This header uses std::unique_ptr, but <memory> can't be directly
  24    included due to issues with macros.  Hence <memory> must be included
  25    from system.h by defining INCLUDE_MEMORY in any source file using
  26    make-unique.h.  */
  27
  28 #ifndef INCLUDE_MEMORY
  29 # error "You must define INCLUDE_MEMORY before including system.h to use make-unique.h"
  30 #endif
  31
  32 #include <type_traits>
  33
  34 /* Minimal implementation of make_unique for C++11 compatibility
  35    (std::make_unique is C++14).  */
  36
  37 template<typename T, typename... Args>
  38 inline typename std::enable_if<!std::is_array<T>::value, std::unique_ptr<T>>::type
  39 make_unique(Args&&... args)
  40 {
  41   return std::unique_ptr<T> (new T (std::forward<Args> (args)...));
  42 }
  43
  44 #endif /* ! GCC_MAKE_UNIQUE */