Scanner.h

   1 #ifndef SCANNER_H_INCLUDED
   2 #define SCANNER_H_INCLUDED
   3
   4 class Scanner
   5 {
   6         public:
   7
   8                 enum eSymbolType
   9                 {
  10                         eBrace = 0,
  11                         eString,
  12                         eNumber,
  13                         eSymbol,
  14                         eSpecial,
  15                         eSpace,
  16                         eEndOfFile
  17                 };
  18
  19
  20                 enum eScannerState
  21                 {
  22                         eInWhiteSpace = 0,
  23                         eInString,
  24                         eInNumeric,
  25                         eInSymbol,
  26                         eInOpenBrace,
  27                         eInCloseBrace,
  28                         eFinished
  29                 };
  30
  31                 Scanner(std::istream& in);
  32
  33                 std::string next(eSymbolType& kind);
  34
  35
  36
  37         private:
  38                 bool isSpecial(std::string symbol);
  39
  40                 static const char *specials[];
  41
  42                 std::istream& in_;
  43                 eScannerState state_;
  44 };
  45
  46 #endif