--- /dev/null
+%{
+
+#include "automaton.h"
+#include "automatonparse_promela.h"
+#include "lex.yy.c"
+
+%}
+
+%union{
+ double real;
+ int integer;
+ char* string;
+ xbt_exp_label_t label;
+}
+
+%token NEVER
+%token IF
+%token FI
+%token IMPLIES
+%token GOTO
+%token AND
+%token OR
+%token NOT
+%token LEFT_PAR
+%token RIGHT_PAR
+%token CASE
+%token COLON
+%token SEMI_COLON
+%token CASE_TRUE
+%token LEFT_BRACE
+%token RIGHT_BRACE
+%token <integer> LITT_ENT
+%token <string> LITT_CHAINE
+%token <real> LITT_REEL
+%token <string> ID
+
+%type <label> exp;
+
+%start automaton
+
+%left AND OR
+%nonassoc NOT
+
+%%
+
+automaton : NEVER LEFT_BRACE stateseq RIGHT_BRACE
+ ;
+
+stateseq :
+ | ID COLON { new_state($1, 1);} IF option FI SEMI_COLON stateseq
+ ;
+
+option :
+ | CASE exp IMPLIES GOTO ID option { new_transition($5, $2);}
+ ;
+
+exp : LEFT_PAR exp RIGHT_PAR { $$ = $2; }
+ | exp OR exp { $$ = new_label(0, $1, $3); }
+ | exp AND exp { $$ = new_label(1, $1, $3); }
+ | NOT exp { $$ = new_label(2, $2); }
+ | CASE_TRUE { $$ = new_label(4); }
+ | ID { $$ = new_label(3, $1); }
+ ;
+
+%%
+
+int yyerror(char *s) {
+ fprintf(stderr, "%s\n", s);
+ return 0;
+}
+
+
