mirror of
https://github.com/GothenburgBitFactory/timewarrior.git
synced 2025-07-07 20:06:39 +02:00
90 lines
2.7 KiB
C++
90 lines
2.7 KiB
C++
////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Copyright 2015 - 2016, Paul Beckingham, Federico Hernandez.
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
// of this software and associated documentation files (the "Software"), to deal
|
|
// in the Software without restriction, including without limitation the rights
|
|
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
// copies of the Software, and to permit persons to whom the Software is
|
|
// furnished to do so, subject to the following conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be included
|
|
// in all copies or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
|
|
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
// SOFTWARE.
|
|
//
|
|
// http://www.opensource.org/licenses/mit-license.php
|
|
//
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef INCLUDED_LR0
|
|
#define INCLUDED_LR0
|
|
|
|
#include <Grammar.h>
|
|
#include <set>
|
|
#include <map>
|
|
#include <string>
|
|
|
|
class LR0
|
|
{
|
|
public:
|
|
void initialize (const Grammar&);
|
|
void parse (const std::string&);
|
|
void debug (bool);
|
|
std::string dump () const;
|
|
|
|
class Item
|
|
{
|
|
public:
|
|
Item (const std::vector <std::string>&);
|
|
bool operator== (const LR0::Item&);
|
|
void setGrammarRuleIndex (const int);
|
|
bool advance ();
|
|
bool done () const;
|
|
std::string next () const;
|
|
std::string dump () const;
|
|
|
|
public:
|
|
std::vector <std::string> _rule;
|
|
unsigned int _cursor;
|
|
int _grammarRule;
|
|
};
|
|
|
|
class Closure : public std::vector <Item>
|
|
{
|
|
};
|
|
|
|
class States : public std::vector <Closure>
|
|
{
|
|
public:
|
|
std::string dump () const;
|
|
};
|
|
|
|
private:
|
|
std::set <std::string> getExpectedSymbols (const Closure&) const;
|
|
void initializeFirstState (States&) const;
|
|
void closeState (States&, const int) const;
|
|
void createParseTable (States&);
|
|
|
|
private:
|
|
// Copy of the grammar details.
|
|
std::vector <std::vector <std::string>> _augmented;
|
|
std::vector <std::string> _rules;
|
|
std::vector <std::string> _terminals;
|
|
|
|
// state column result
|
|
// | | |
|
|
std::vector <std::map <std::string, std::string>> _actions;
|
|
std::vector <std::map <std::string, std::string>> _goto;
|
|
|
|
bool _debug {false};
|
|
};
|
|
|
|
#endif
|