ATOOLS/YAML/regex_yaml.h

0001 #ifndef REGEX_H_62B23520_7C8E_11DE_8A39_0800200C9A66
0002 #define REGEX_H_62B23520_7C8E_11DE_8A39_0800200C9A66
0003
0004 #if defined(_MSC_VER) ||                                            \
0005     (defined(__GNUC__) && (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || \
0006      (__GNUC__ >= 4))  // GCC supports "pragma once" correctly since 3.4
0007 #pragma once
0008 #endif
0009
0010 #include <string>
0011 #include <vector>
0012
0013 #include "ATOOLS/YAML/yaml-cpp/dll.h"
0014
0015 namespace SHERPA_YAML {
0016 class Stream;
0017
0018 enum REGEX_OP {
0019   REGEX_EMPTY,
0020   REGEX_MATCH,
0021   REGEX_RANGE,
0022   REGEX_OR,
0023   REGEX_AND,
0024   REGEX_NOT,
0025   REGEX_SEQ
0026 };
0027
0028 // simplified regular expressions
0029 // . Only straightforward matches (no repeated characters)
0030 // . Only matches from start of string
0031 class YAML_CPP_API RegEx {
0032  public:
0033   RegEx();
0034   explicit RegEx(char ch);
0035   RegEx(char a, char z);
0036   RegEx(const std::string& str, REGEX_OP op = REGEX_SEQ);
0037   ~RegEx() = default;
0038
0039   friend YAML_CPP_API RegEx operator!(const RegEx& ex);
0040   friend YAML_CPP_API RegEx operator|(const RegEx& ex1, const RegEx& ex2);
0041   friend YAML_CPP_API RegEx operator&(const RegEx& ex1, const RegEx& ex2);
0042   friend YAML_CPP_API RegEx operator+(const RegEx& ex1, const RegEx& ex2);
0043
0044   bool Matches(char ch) const;
0045   bool Matches(const std::string& str) const;
0046   bool Matches(const Stream& in) const;
0047   template <typename Source>
0048   bool Matches(const Source& source) const;
0049
0050   int Match(const std::string& str) const;
0051   int Match(const Stream& in) const;
0052   template <typename Source>
0053   int Match(const Source& source) const;
0054
0055  private:
0056   explicit RegEx(REGEX_OP op);
0057
0058   template <typename Source>
0059   bool IsValidSource(const Source& source) const;
0060   template <typename Source>
0061   int MatchUnchecked(const Source& source) const;
0062
0063   template <typename Source>
0064   int MatchOpEmpty(const Source& source) const;
0065   template <typename Source>
0066   int MatchOpMatch(const Source& source) const;
0067   template <typename Source>
0068   int MatchOpRange(const Source& source) const;
0069   template <typename Source>
0070   int MatchOpOr(const Source& source) const;
0071   template <typename Source>
0072   int MatchOpAnd(const Source& source) const;
0073   template <typename Source>
0074   int MatchOpNot(const Source& source) const;
0075   template <typename Source>
0076   int MatchOpSeq(const Source& source) const;
0077
0078  private:
0079   REGEX_OP m_op;
0080   char m_a{};
0081   char m_z{};
0082   std::vector<RegEx> m_params;
0083 };
0084 }  // namespace SHERPA_YAML
0085
0086 #include "regeximpl.h"
0087
0088 #endif  // REGEX_H_62B23520_7C8E_11DE_8A39_0800200C9A66