129 lines
3.3 KiB
C++
129 lines
3.3 KiB
C++
/*
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* Copyright © 2019-2023 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 <https://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 Driver.hh
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#endif
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#include "Environment.hh"
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#include "Expressions.hh"
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#include "Parser.hh"
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#include <stack>
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// Declare TokenizerFlexLexer class
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#ifndef __FLEX_LEXER_H
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# define yyFlexLexer TokenizerFlexLexer
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# include <FlexLexer.h>
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# undef yyFlexLexer
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#endif
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namespace macro
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{
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/* The lexer class
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* It was necessary to subclass the TokenizerFlexLexer class generated by Flex,
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* since the prototype for TokenizerFlexLexer::yylex() was not convenient.
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*/
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class TokenizerFlex : public TokenizerFlexLexer
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{
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public:
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TokenizerFlex(istream* in) : TokenizerFlexLexer {in}
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{
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}
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TokenizerFlex(const TokenizerFlex&) = delete;
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TokenizerFlex& operator=(const TokenizerFlex&) = delete;
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//! The main lexing function
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Tokenizer::parser::token_type lex(Tokenizer::parser::semantic_type* yylval,
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Tokenizer::parser::location_type* yylloc,
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macro::Driver& driver);
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static void location_increment(Tokenizer::parser::location_type* yylloc, const char* yytext);
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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 Driver
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{
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private:
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vector<DirectivePtr> statements;
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stack<vector<DirectivePtr>> directive_stack;
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public:
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Driver() = default;
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Driver(const Driver&) = delete;
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Driver& operator=(const Driver&) = delete;
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//! Exception thrown when value of an unknown variable is requested
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struct UnknownVariable
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{
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const string name;
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};
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//! Starts parsing a file, modifies `env`, `paths` and `output`
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//! as they are modified by various macro directives
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void parse(const string& file, const istream& modfile, bool debug,
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const vector<pair<string, string>>& defines, Environment& env,
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vector<filesystem::path>& paths, ostream& output);
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//! Name of main file being parsed (for error reporting purposes)
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string file;
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//! Reference to the lexer
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unique_ptr<TokenizerFlex> lexer;
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//! Error handler
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void error(const Tokenizer::parser::location_type& location, const string& message) const;
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bool
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inContext() const
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{
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return !directive_stack.empty();
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}
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void
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pushContext()
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{
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directive_stack.emplace(vector<DirectivePtr>());
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}
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void
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pushContextTop(DirectivePtr statement)
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{
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directive_stack.top().emplace_back(move(statement));
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}
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void
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pushStatements(DirectivePtr statement)
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{
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statements.emplace_back(move(statement));
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}
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vector<DirectivePtr>
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popContext()
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{
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auto top = move(directive_stack.top());
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directive_stack.pop();
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return top;
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}
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};
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}
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#endif
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