101 lines
2.8 KiB
C++
101 lines
2.8 KiB
C++
/*
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* Copyright (C) 2008 Dynare Team
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*
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* This file is part of Dynare.
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*
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* Dynare is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Dynare is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Dynare. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _MACRO_DRIVER_HH
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#define _MACRO_DRIVER_HH
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#ifdef _PARSING_DRIVER_HH
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# error Impossible to include both ParsingDriver.hh and MacroDriver.hh
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#endif
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#include <string>
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#include <iostream>
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#include <stack>
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#include "MacroBison.hh"
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using namespace std;
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// Declare MacroFlexLexer class
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#ifndef __FLEX_LEXER_H
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# define yyFlexLexer MacroFlexLexer
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# include <FlexLexer.h>
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# undef yyFlexLexer
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#endif
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//! The lexer class
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/*! Actually it was necessary to subclass the MacroFlexLexer class generated by Flex,
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since the prototype for MacroFlexLexer::yylex() was not convenient.
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*/
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class MacroFlex : public MacroFlexLexer
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{
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private:
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//! The stack of scanner states
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/*! We could have used instead yypush_buffer_state() and yypop_buffer_state(),
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but those functions do not exist in Flex 2.5.4 */
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stack<struct yy_buffer_state *> state_stack;
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public:
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MacroFlex(istream* in = 0, ostream* out = 0);
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//! The main lexing function
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Macro::parser::token_type lex(Macro::parser::semantic_type *yylval,
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Macro::parser::location_type *yylloc,
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MacroDriver &driver);
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};
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//! Implements the macro expansion using a Flex scanner and a Bison parser
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class MacroDriver
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{
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public:
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//! Constructor
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MacroDriver();
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//! Destructor
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virtual ~MacroDriver();
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//! Starts parsing a file, returns output in out
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void parse(const string &f, ostream &out);
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//! Pointer to keep track of the input file stream currently scanned
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ifstream *ifs;
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//! Stack of locations used for (possibly nested) includes
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stack<Macro::parser::location_type> loc_stack;
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//! Name of main file being parsed
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string file;
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//! Reference to the lexer
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class MacroFlex *lexer;
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//! Trace scanning ?
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/*! If set to true before calling parse(), the flex scanner will dump a lot of debugging information. Defaults to false.
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*/
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bool trace_scanning;
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//! Trace parsing ?
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/*! If set to true before calling parse(), the bison parser will dump debugging information. Defaults to false. */
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bool trace_parsing;
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//! Error handler
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void error(const Macro::parser::location_type &l, const string &m);
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};
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#endif // ! MACRO_DRIVER_HH
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