1// Copyright (C) 2016 The Qt Company Ltd.
2// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
3
4#include "lalr.h"
5#include "dotgraph.h"
6#include "parsetable.h"
7#include "cppgenerator.h"
8#include "recognizer.h"
9
10#include <QtCore/qcoreapplication.h>
11#include <QtCore/qfile.h>
12#include <QtCore/qstringlist.h>
13#include <QtCore/qdebug.h>
14
15#include <cstdlib>
16
17#define QLALR_NO_DEBUG_TABLE
18#define QLALR_NO_DEBUG_DOT
19
20using namespace Qt::StringLiterals;
21
22static void help_me ()
23{
24 qerr() << "Usage: qlalr [options] [input file name]" << Qt::endl
25 << Qt::endl
26 << " --help, -h\t\tdisplay this help and exit" << Qt::endl
27 << " --verbose, -v\t\tverbose output" << Qt::endl
28 << " --no-debug\t\tno debug information" << Qt::endl
29 << " --no-lines\t\tno #line directives" << Qt::endl
30 << " --dot\t\t\tgenerate a graph" << Qt::endl
31 << " --qt\t\t\tadd the Qt copyright header and Qt-specific types and macros" << Qt::endl
32 << " --exit-on-warn\texit with status code 2 on warning" << Qt::endl
33 << Qt::endl;
34 exit (status: 0);
35}
36
37int main (int argc, char *argv[])
38{
39 QCoreApplication app (argc, argv);
40
41 bool generate_dot = false;
42 bool generate_report = false;
43 bool no_lines = false;
44 bool debug_info = true;
45 bool qt_copyright = false;
46 bool warnings_are_errors = false;
47 QString file_name;
48
49 const QStringList args = app.arguments().mid(pos: 1);
50 for (const QString &arg : args) {
51 if (arg == "-h"_L1 || arg == "--help"_L1)
52 help_me ();
53
54 else if (arg == "-v"_L1 || arg == "--verbose"_L1)
55 generate_report = true;
56
57 else if (arg == "--dot"_L1)
58 generate_dot = true;
59
60 else if (arg == "--no-lines"_L1)
61 no_lines = true;
62
63 else if (arg == "--no-debug"_L1)
64 debug_info = false;
65
66 else if (arg == "--qt"_L1)
67 qt_copyright = true;
68
69 else if (arg == "--exit-on-warn"_L1)
70 warnings_are_errors = true;
71
72 else if (file_name.isEmpty ())
73 file_name = arg;
74
75 else
76 qerr() << "*** Warning. Ignore argument `" << arg << "'" << Qt::endl;
77 }
78
79 if (file_name.isEmpty ())
80 {
81 help_me ();
82 exit (EXIT_SUCCESS);
83 }
84
85 Grammar grammar;
86 Recognizer p (&grammar, no_lines);
87
88 if (! p.parse (input_file: file_name))
89 exit (EXIT_FAILURE);
90
91 if (grammar.rules.empty())
92 {
93 qerr() << "*** Fatal. No rules!" << Qt::endl;
94 exit (EXIT_FAILURE);
95 }
96
97 else if (grammar.start == grammar.names.end ())
98 {
99 qerr() << "*** Fatal. No start symbol!" << Qt::endl;
100 exit (EXIT_FAILURE);
101 }
102
103 grammar.buildExtendedGrammar ();
104 grammar.buildRuleMap ();
105
106 Automaton aut (&grammar);
107 aut.build ();
108
109 CppGenerator gen (p, grammar, aut, generate_report);
110 gen.setDebugInfo (debug_info);
111 gen.setCopyright (qt_copyright);
112 gen.setWarningsAreErrors (warnings_are_errors);
113 gen ();
114
115 if (generate_dot)
116 {
117 DotGraph genDotFile (qout());
118 genDotFile (&aut);
119 }
120
121 else if (generate_report)
122 {
123 ParseTable genParseTable (qout());
124 genParseTable(&aut);
125 }
126
127 return EXIT_SUCCESS;
128}
129
130QString Recognizer::expand (const QString &text) const
131{
132 QString code = text;
133
134 if (_M_grammar->start != _M_grammar->names.end ())
135 {
136 code = code.replace (before: "$start_id"_L1, after: QString::number (std::distance (first: _M_grammar->names.begin (), last: _M_grammar->start)));
137 code = code.replace (before: "$start"_L1, after: *_M_grammar->start);
138 }
139
140 code = code.replace (before: "$header"_L1, after: _M_grammar->table_name.toLower () + "_p.h"_L1);
141
142 code = code.replace (before: "$table"_L1, after: _M_grammar->table_name);
143 code = code.replace (before: "$parser"_L1, after: _M_grammar->table_name);
144
145 if (_M_current_rule != _M_grammar->rules.end ())
146 {
147 code = code.replace (before: "$rule_number"_L1, after: QString::number (std::distance (first: _M_grammar->rules.begin (), last: _M_current_rule)));
148 code = code.replace (before: "$rule"_L1, after: *_M_current_rule->lhs);
149 }
150
151 return code;
152}
153

source code of qtbase/src/tools/qlalr/main.cpp