Fawkes API Fawkes Development Version
pddl_parser.cpp
1/***************************************************************************
2 * pddl_parser.cpp
3 *
4 * Created: Fri 19 May 2017 11:10:01 CEST
5 * Copyright 2017 Matthias Loebach
6 * Till Hofmann
7 ****************************************************************************/
8
9/* This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU Library General Public License for more details.
18 *
19 * Read the full text in the LICENSE.GPL file in the doc directory.
20 */
21
22#include "pddl_parser.h"
23
24#include <fstream>
25#include <streambuf>
26
27namespace pddl_parser {
28
29/** @class PddlParser <pddl_parser/pddl_parser.h>
30 * Parse a PDDL domain file or problem.
31 * This class parses a domain/problem into a structured representation of
32 * the domain, which can then be used by other components.
33 * @see pddl_ast.h
34 */
35
36/** @class PddlParserException <pddl_parser/pddl_parser.h>
37 * Exception thrown by the parser if an error occurs during parsing.
38 */
39
40/** provide a description of the position in a file, where an error occurred.
41 * @param start_it begin of parsing context
42 * @param end_it end of parsing context
43 * @param current_it position in the parsing context
44 * \return a string containing the line at \a current_it and an indication
45 * of the current position
46 */
47std::string
48PddlParser::getErrorContext(const iterator_type &start_it,
49 const iterator_type &end_it,
50 const iterator_type &current_it)
51{
52 auto line = get_current_line(start_it, current_it, end_it);
53 std::string line_str = std::string(line.begin(), line.end());
54 std::replace(begin(line_str), end(line_str), '\t', ' ');
55 std::ostringstream error_msg;
56 error_msg << " line:" << get_line(current_it) << ", col:" << get_column(line.begin(), current_it)
57 << "\n";
58 while (!line.empty() && std::strchr("\r\n", *line.begin()))
59 line.advance_begin(1);
60 error_msg << line_str << "\n";
61 error_msg << std::string(std::distance(line.begin(), current_it), ' ')
62 << "^ --- parsing halted here\n";
63 return error_msg.str();
64}
65
66/** Parse the PDDL domain.
67 * @param pddl_domain The PDDL domain as string (not a path)
68 * @return A Domain object that contains the parsed domain.
69 * @see Domain
70 */
71Domain
72PddlParser::parseDomain(const std::string &pddl_domain)
73{
76
77 skipper s;
78 Domain dom;
79 bool r = false;
80
81 iterator_type iter(pddl_domain.begin());
82 iterator_type end(pddl_domain.end());
83 grammar g;
84
85 try {
86 r = phrase_parse(iter, end, g, s, dom);
87 } catch (qi::expectation_failure<iterator_type> const &e) {
88 using boost::spirit::basic_info_walker;
89 std::stringstream expectation;
90 boost::spirit::simple_printer<std::stringstream> pr(expectation);
91 basic_info_walker<boost::spirit::simple_printer<std::stringstream>> walker(pr, e.what_.tag, 0);
92 boost::apply_visitor(walker, e.what_.value);
93 throw PddlSyntaxException(std::string("Syntax Error: ") + e.what() + " expected "
94 + expectation.str() + " at " + getErrorContext(iter, end, e.first),
95 iter);
96 } catch (PddlSemanticsException &e) {
97 e.prepend("Semantic Error: ");
98 e.append(getErrorContext(iter, end, e.pos).c_str());
99 e.collapse_msg();
100 throw;
101 }
102
103 if (!r) {
104 throw PddlParserException("Parsing PDDL domain string failed!");
105 }
106 return dom;
107}
108
109/** Parse the PDDL problem.
110 * @param pddl_problem The problem as string (not a path)
111 * @return A Problem object that contains the parsed problem.
112 * @see Problem
113 */
115PddlParser::parseProblem(const std::string &pddl_problem)
116{
119
120 grammar g;
121 skipper s;
122 Problem prob;
123 bool r = false;
124
125 iterator_type iter(pddl_problem.begin());
126 iterator_type end(pddl_problem.end());
127
128 try {
129 r = phrase_parse(iter, end, g, s, prob);
130 } catch (qi::expectation_failure<iterator_type> const &e) {
131 throw PddlSyntaxException(std::string("Expectation failed: ") + e.what()
132 + getErrorContext(iter, end, e.first),
133 iter);
134 }
135
136 if (!r) {
137 throw PddlParserException("Parsing PDDL problem string failed!");
138 }
139 return prob;
140}
141
142} // namespace pddl_parser
Exception thrown by the parser if an error occurs during parsing.
static Domain parseDomain(const std::string &pddl_domain)
Parse the PDDL domain.
Definition: pddl_parser.cpp:72
static Problem parseProblem(const std::string &pddl_problem)
Parse the PDDL problem.
Exception thrown by the parser if an error occurs during semantic checks during parsing.
Exception thrown by the parser if there is a syntax error.
A structured representation of a PDDL domain.
Definition: pddl_ast.h:157
A structured representation of a PDDL problem.
Definition: pddl_ast.h:180
A Boost QI parser for a PDDL domain.
Definition: pddl_grammar.h:59
A skipper for PDDL files.
Definition: pddl_grammar.h:45
A Boost QI parser for a PDDL problem.
Definition: pddl_grammar.h:283