src/formatter.h

   1 /***********************************
   2 ** Tsunagari Tile Engine          **
   3 ** formatter.h                    **
   4 ** Copyright 2013 PariahSoft LLC  **
   5 ***********************************/
   6
   7 // **********
   8 // Permission is hereby granted, free of charge, to any person obtaining a copy
   9 // of this software and associated documentation files (the "Software"), to
  10 // deal in the Software without restriction, including without limitation the
  11 // rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
  12 // sell copies of the Software, and to permit persons to whom the Software is
  13 // furnished to do so, subject to the following conditions:
  14 //
  15 // The above copyright notice and this permission notice shall be included in
  16 // all copies or substantial portions of the Software.
  17 //
  18 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  21 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  23 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  24 // IN THE SOFTWARE.
  25 // **********
  26
  27 #ifndef FORMATTER_H
  28 #define FORMATTER_H
  29
  30 #include <assert.h>
  31 #include <string>
  32
  33 /**
  34  * Formatter
  35  *
  36  * Sample usage:
  37  *   Log::info(Formatter("coordinates are: % %") % x % y);
  38  */
  39 class Formatter {
  40 public:
  41         Formatter(std::string format);
  42         ~Formatter();
  43
  44         template<class T>
  45         Formatter& operator %(T data)
  46         {
  47                 assert(pos < result.size());
  48
  49                 size_t markerSize = 1;
  50                 result.replace(pos, markerSize, format(data));
  51                 findNextPlaceholder();
  52                 return *this;
  53         }
  54
  55         operator const std::string&();
  56
  57 private:
  58         template<class T>
  59         std::string format(const T data);
  60
  61         void findNextPlaceholder();
  62
  63         std::string result;
  64         size_t pos;
  65 };
  66
  67 #endif