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Enable parsing stand-alone rational expressions with the LTL parser.

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* src/ltlparse/ltlparse.yy (parse_ratexp): New function.
(START_LTL, START_RATEXP): Add these new tokens.
(result): Parse and LTL formula or a rational expression depending
on the start symbol.
* src/ltlparse/public.hh (parse_ratexp): New function.
* src/ltlparse/parsedecl.hh (flex_set_buffer): Add a new argument
to set the starting rule.
* src/ltlparse/ltlscan.ll (flex_set_buffer): Adjust.
(start_token): New global variable.  Return this as first token if
it is set.
This commit is contained in:
Alexandre Duret-Lutz 2010-02-08 11:36:55 +01:00
parent c6dd811b08
commit 9aebb80e08
4 changed files with 92 additions and 19 deletions
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4
src/ltlparse/parsedecl.hh
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@ -1,3 +1,5 @@
// Copyright (C) 2010 Laboratoire de Recherche et Développement de
// l'Epita (LRDE)
// Copyright (C) 2003, 2005 Laboratoire d'Informatique de Paris 6 (LIP6),
// département Systèmes Répartis Coopératifs (SRC), Université Pierre
// et Marie Curie.
@ -29,6 +31,6 @@
int ltlyylex (ltlyy::parser::semantic_type *yylval, ltlyy::location *yylloc)
YY_DECL;
void flex_set_buffer(const char *buf);
void flex_set_buffer(const char *buf, int start_tok);
#endif // SPOT_LTLPARSE_PARSEDECL_HH