github.com/igggame/nebulas-go@v2.1.0+incompatible/nbre/util/enable_func_if.h (about)

     1  // Copyright (C) 2018 go-nebulas authors
     2  //
     3  // This file is part of the go-nebulas library.
     4  //
     5  // the go-nebulas library is free software: you can redistribute it and/or
     6  // modify
     7  // it under the terms of the GNU General Public License as published by
     8  // the Free Software Foundation, either version 3 of the License, or
     9  // (at your option) any later version.
    10  //
    11  // the go-nebulas library is distributed in the hope that it will be useful,
    12  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    13  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    14  // GNU General Public License for more details.
    15  //
    16  // You should have received a copy of the GNU General Public License
    17  // along with the go-nebulas library.  If not, see
    18  // <http://www.gnu.org/licenses/>.
    19  //
    20  #pragma once
    21  #include "common/common.h"
    22  
    23  namespace neb {
    24  namespace util {
    25  
    26  template <bool V> struct enable_func_if {};
    27  template <> struct enable_func_if<true> {
    28  public:
    29    template <typename Func> inline enable_func_if(Func &&f) { f(); }
    30  };
    31  template <> struct enable_func_if<false> {
    32  public:
    33    template <typename Func> inline enable_func_if(Func &&) {}
    34  };
    35  }
    36  }