neverclaimparse.yy 5.93 KB
Newer Older
1
2
3
/* -*- coding: utf-8 -*-
** Copyright (C) 2010, 2011, 2012 Laboratoire de Recherche et
** Développement de l'Epita (LRDE).
Felix Abecassis's avatar
Felix Abecassis committed
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
**
** This file is part of Spot, a model checking library.
**
** Spot 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 2 of the License, or
** (at your option) any later version.
**
** Spot 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 Spot; see the file COPYING.  If not, write to the Free
** Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
** 02111-1307, USA.
*/
%language "C++"
%locations
%defines
%expect 0 // No shift/reduce
%expect-rr 0 // No reduce/reduce
%name-prefix "neverclaimyy"
%debug
%error-verbose

%code requires
{
#include <string>
34
35
#include <cstring>
#include "ltlast/constant.hh"
Felix Abecassis's avatar
Felix Abecassis committed
36
#include "public.hh"
37

38
  typedef std::pair<const spot::ltl::formula*, std::string*> pair;
Felix Abecassis's avatar
Felix Abecassis committed
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
}

%parse-param {spot::neverclaim_parse_error_list& error_list}
%parse-param {spot::ltl::environment& parse_environment}
%parse-param {spot::tgba_explicit_string*& result}
%union
{
  std::string* str;
  pair* p;
  std::list<pair>* list;
}

%code
{
#include "ltlast/constant.hh"
  /* Unfortunately Bison 2.3 uses the same guards in all parsers :( */
#undef BISON_POSITION_HH
#undef BISON_LOCATION_HH
#include "ltlparse/public.hh"

/* neverclaimparse.hh and parsedecl.hh include each other recursively.
   We must ensure that YYSTYPE is declared (by the above %union)
   before parsedecl.hh uses it. */
#include "parsedecl.hh"
using namespace spot::ltl;
}

%token NEVER "never"
%token SKIP "skip"
%token IF "if"
%token FI "fi"
%token ARROW "->"
%token GOTO "goto"
72
73
74
%token FALSE "false"
%token <str> FORMULA "boolean formula"
%token <str> IDENT "identifier"
75
%type <str> formula opt_dest
Felix Abecassis's avatar
Felix Abecassis committed
76
77
%type <p> transition
%type <list> transitions
78
79
%type <str> ident_list

Felix Abecassis's avatar
Felix Abecassis committed
80
81

%destructor { delete $$; } <str>
82
%destructor { $$->first->destroy(); delete $$->second; delete $$; } <p>
Felix Abecassis's avatar
Felix Abecassis committed
83
84
85
86
%destructor {
  for (std::list<pair>::iterator i = $$->begin();
       i != $$->end(); ++i)
  {
87
    i->first->destroy();
Felix Abecassis's avatar
Felix Abecassis committed
88
89
90
91
    delete i->second;
  }
  delete $$;
  } <list>
92
93
94
95
96
  %printer {
    if ($$)
      debug_stream() << *$$;
    else
      debug_stream() << "\"\""; } <str>
Felix Abecassis's avatar
Felix Abecassis committed
97
98
99
100

%%
neverclaim:
  "never" '{' states '}'
101

Felix Abecassis's avatar
Felix Abecassis committed
102
103
104

states:
  /* empty */
105
106
107
108
  | state
  | states ';' state
  | states ';'

109
ident_list:
110
111
112
113
114
115
116
    IDENT ':'
    {
      $$ = $1;
    }
  | ident_list IDENT ':'
    {
      result->add_state_alias(*$2, *$1);
117
118
119
120
121
122
123
124
125
126
127
      // Keep any identifier that start with accept.
      if (strncmp("accept", $1->c_str(), 6))
        {
          delete $1;
          $$ = $2;
        }
      else
        {
	  delete $2;
	  $$ = $1;
        }
128
    }
Felix Abecassis's avatar
Felix Abecassis committed
129
130

state:
131
  ident_list "skip"
Felix Abecassis's avatar
Felix Abecassis committed
132
    {
Pierre PARUTTO's avatar
Pierre PARUTTO committed
133
      spot::state_explicit_string::transition* t = result->create_transition(*$1, *$1);
134
135
      bool acc = !strncmp("accept", $1->c_str(), 6);
      if (acc)
136
	result->add_acceptance_condition(t,
137
					 spot::ltl::constant::true_instance());
Felix Abecassis's avatar
Felix Abecassis committed
138
139
      delete $1;
    }
140
141
142
  | ident_list { delete $1; }
  | ident_list "false" { delete $1; }
  | ident_list "if" transitions "fi"
Felix Abecassis's avatar
Felix Abecassis committed
143
144
    {
      std::list<pair>::iterator it;
145
146
      bool acc = !strncmp("accept", $1->c_str(), 6);
      for (it = $3->begin(); it != $3->end(); ++it)
Felix Abecassis's avatar
Felix Abecassis committed
147
      {
Pierre PARUTTO's avatar
Pierre PARUTTO committed
148
	spot::state_explicit_string::transition* t =
149
	  result->create_transition(*$1, *it->second);
150

151
152
153
154
	result->add_condition(t, it->first);
	if (acc)
	  result
	    ->add_acceptance_condition(t, spot::ltl::constant::true_instance());
Felix Abecassis's avatar
Felix Abecassis committed
155
156
157
      }
      // Free the list
      delete $1;
158
159
      for (std::list<pair>::iterator it = $3->begin();
	   it != $3->end(); ++it)
Felix Abecassis's avatar
Felix Abecassis committed
160
	delete it->second;
161
      delete $3;
Felix Abecassis's avatar
Felix Abecassis committed
162
    }
163

Felix Abecassis's avatar
Felix Abecassis committed
164
165
166

transitions:
  /* empty */ { $$ = new std::list<pair>; }
167
  | transitions transition
Felix Abecassis's avatar
Felix Abecassis committed
168
    {
169
170
171
172
173
174
      if ($2)
	{
	  $1->push_back(*$2);
	  delete $2;
	}
      $$ = $1;
Felix Abecassis's avatar
Felix Abecassis committed
175
176
    }

177
178

formula: FORMULA | "false" { $$ = new std::string("0"); }
179
180
181
182
183
184
185
186
187
188
189

opt_dest:
  /* empty */
    {
      $$ = 0;
    }
  | "->" "goto" IDENT
    {
      $$ = $3;
    }

Felix Abecassis's avatar
Felix Abecassis committed
190
transition:
191
  ':' ':' formula opt_dest
Felix Abecassis's avatar
Felix Abecassis committed
192
    {
193
194
195
196
197
198
      // If there is no destination, do ignore the transition.
      // This happens for instance with
      //   if
      //   :: false
      //   fi
      if (!$4)
199
	{
200
201
202
203
204
205
	  delete $3;
	  $$ = 0;
	}
      else
	{
	  spot::ltl::parse_error_list pel;
206
	  const spot::ltl::formula* f = spot::ltl::parse(*$3, pel);
207
208
209
210
211
212
213
214
215
216
217
218
219
	  delete $3;
	  for(spot::ltl::parse_error_list::const_iterator i = pel.begin();
	  i != pel.end(); ++i)
	    {
	      // Adjust the diagnostic to the current position.
	      location here = @3;
	      here.end.line = here.begin.line + i->first.end.line - 1;
	      here.end.column = here.begin.column + i->first.end.column -1;
	      here.begin.line += i->first.begin.line - 1;
	      here.begin.column += i->first.begin.column - 1;
	      error(here, i->second);
	    }
	  $$ = new pair(f, $4);
220
	}
Felix Abecassis's avatar
Felix Abecassis committed
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
    }
%%

void
neverclaimyy::parser::error(const location_type& location,
			    const std::string& message)
{
  error_list.push_back(spot::neverclaim_parse_error(location, message));
}

namespace spot
{
  tgba_explicit_string*
  neverclaim_parse(const std::string& name,
		   neverclaim_parse_error_list& error_list,
		   bdd_dict* dict,
		   environment& env,
		   bool debug)
  {
    if (neverclaimyyopen(name))
      {
	error_list.push_back
	  (neverclaim_parse_error(neverclaimyy::location(),
				  std::string("Cannot open file ") + name));
	return 0;
      }
    tgba_explicit_string* result = new tgba_explicit_string(dict);
248
    result->declare_acceptance_condition(spot::ltl::constant::true_instance());
Felix Abecassis's avatar
Felix Abecassis committed
249
250
251
252
253
254
255
256
257
258
259
    neverclaimyy::parser parser(error_list, env, result);
    parser.set_debug_level(debug);
    parser.parse();
    neverclaimyyclose();
    return result;
  }
}

// Local Variables:
// mode: c++
// End: