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DynareFlex.ll

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  • DynareFlex.ll 61.69 KiB
    /* -*- C++ -*- */
    /*
     * Copyright © 2003-2022 Dynare Team
     *
     * This file is part of Dynare.
     *
     * Dynare is free software: you can redistribute it and/or modify
     * it under the terms of the GNU General Public License as published by
     * the Free Software Foundation, either version 3 of the License, or
     * (at your option) any later version.
     *
     * Dynare is distributed in the hope that it will be useful,
     * but WITHOUT ANY WARRANTY; without even the implied warranty of
     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     * GNU General Public License for more details.
     *
     * You should have received a copy of the GNU General Public License
     * along with Dynare.  If not, see <https://www.gnu.org/licenses/>.
     */
    
    
    %{
    #include <cstring>
    #include "ParsingDriver.hh"
    
    using namespace std;
    
    // Announce to Flex the prototype we want for lexing function
    #define YY_DECL                                                \
      Dynare::parser::token_type                                   \
        DynareFlex::lex(Dynare::parser::semantic_type *yylval,     \
                        Dynare::parser::location_type *yylloc,     \
                        ParsingDriver &driver)
    
    // Shortcut to access tokens defined by Bison
    using token = Dynare::parser::token;
    
    /* By default yylex returns int, we use token_type.
       Unfortunately yyterminate by default returns 0, which is
       not of token_type.  */
    #define yyterminate() return Dynare::parser::token_type (0);
    
    int comment_caller, line_caller;
    /* Particular value : when sigma_e command is found
     this flag is set to 1, when command finished it is set to 0
     */
    int sigma_e = 0;
    string eofbuff;
    %}
    
    %option c++
    
    %option prefix="Dynare"
    
    %option case-insensitive noyywrap batch debug never-interactive
    
     /* NB: if new start conditions are defined, add them in the line for <<EOF>> */
    %x COMMENT
    %x DYNARE_STATEMENT
    %x DYNARE_BLOCK
    %x VERBATIM_BLOCK
    %x NATIVE
    %x NATIVE_COMMENT
    %x DATES_STATEMENT
    %x LINE1
    %x LINE2
    %x LINE3
    
    %{
    // Increments location counter for every token read