xapian-core/common/str.h

   1 /** @file
   2  * @brief Convert types to std::string
   3  */
   4 /* Copyright (C) 2009,2015 Olly Betts
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program 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 this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  19  */
  20
  21 #ifndef XAPIAN_INCLUDED_STR_H
  22 #define XAPIAN_INCLUDED_STR_H
  23
  24 #include <string>
  25
  26 namespace Xapian {
  27 namespace Internal {
  28
  29 /// Convert int to std::string.
  30 std::string str(int value);
  31
  32 /// Convert unsigned int to std::string.
  33 std::string str(unsigned int value);
  34
  35 /// Convert long to std::string.
  36 std::string str(long value);
  37
  38 /// Convert unsigned long to std::string.
  39 std::string str(unsigned long value);
  40
  41 /// Convert long long to std::string.
  42 std::string str(long long value);
  43
  44 /// Convert unsigned long long to std::string.
  45 std::string str(unsigned long long value);
  46
  47 /// Convert double to std::string.
  48 std::string str(double value);
  49
  50 /// Convert const void * to std::string.
  51 std::string str(const void * value);
  52
  53 /** Convert std::string to std::string.
  54  *
  55  *  This is useful as it allows macros and templates to apply str() to a
  56  *  type and have it work if that type is std::string.
  57  */
  58 inline std::string str(const std::string & value) { return value; }
  59
  60 /// Convert const char * to std::string.
  61 inline std::string str(const char * value) { return value; }
  62
  63 /// Convert bool to std::string.
  64 inline std::string str(bool value) {
  65     return std::string(1, '0' | static_cast<char>(value));
  66 }
  67
  68 }
  69 }
  70
  71 using Xapian::Internal::str;
  72
  73 #endif // XAPIAN_INCLUDED_STR_H