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annotate parser.h @ 12:894be158b32d

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define parser as a class and eliminate some global variables
author John W. Eaton <jwe@octave.org>
date Thu, 23 May 2019 17:57:20 -0400
parents 0e154787183d
children d179b0bb85e4
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b97ffa8e4019 multiple inclusion guards in .h files
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1 #if ! defined (calc_parse_h)
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2 #define calc_parse_h 1
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4 namespace calc
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5 {
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894be158b32d define parser as a class and eliminate some global variables
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6 class interpreter;
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8 class parser
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9 {
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10 public:
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12 parser (interpreter&);
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14 parser (const parser&) = delete;
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16 parser& operator = (const parser&) = delete;
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18 ~parser (void);
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20 bool beg_of_stmt (void) const { return m_beg_of_stmt; }
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22 void beg_of_stmt (bool flag) { m_beg_of_stmt = flag; }
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24 int parse_and_execute (const std::string& line);
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26 void emit_error (const char *msg) const;
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28 void emit_result (double value) const;
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30 private:
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32 interpreter& m_interpreter;
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34 void *m_parser_state;
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36 bool m_beg_of_stmt;
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37 };
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38 }
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40 #endif