130 lines
3.8 KiB
LLVM
130 lines
3.8 KiB
LLVM
%{ /* -*- C++ -*- */
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#include <cstdlib>
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#include <cerrno>
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#include <climits>
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#include <string>
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#include "rsin_driver.hh"
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#include "rsin_parser.hh"
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/* Work around an incompatibility in flex (at least versions
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2.5.31 through 2.5.33): it generates code that does
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not conform to C89. See Debian bug 333231
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<http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=333231>. */
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#undef yywrap
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#define yywrap() 1
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/* By default yylex returns int, we use token_type.
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Unfortunately yyterminate by default returns 0, which is
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not of token_type. */
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#define yyterminate() return token::END
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%}
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%option noyywrap nounput batch debug
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id [a-zA-Z][a-zA-Z_0-9:-]*
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int [0-9]+
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blank [ \t]
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%{
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#define YY_USER_ACTION yylloc->columns(yyleng);
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%}
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%%
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%{
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yylloc->step();
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%}
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{blank}+ yylloc->step();
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[\n]+ yylloc->lines(yyleng); yylloc->step();
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%{
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typedef yy::rsin_parser::token token;
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%}
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"options" return token::OPTIONS;
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"use-context-automaton" return token::USE_CTX_AUT;
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"use-concentrations" return token::USE_CONCENTRATIONS;
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"reactions" return token::REACTIONS;
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"initial-contexts" return token::INITIALCONTEXTS;
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"context-entities" return token::CONTEXTENTITIES;
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"context-automaton" return token::CONTEXTAUTOMATON;
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"transitions" return token::TRANSITIONS;
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"states" return token::STATES;
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"init-state" return token::INITSTATE;
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"rsctl-property" return token::RSCTLFORM;
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"{" return token::LCB;
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"}" return token::RCB;
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"(" return token::LRB;
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")" return token::RRB;
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"[" return token::LSB;
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"]" return token::RSB;
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"=" return token::EQ;
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"<" return token::LAB;
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">" return token::RAB;
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":" return token::COL;
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";" return token::SEMICOL;
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"." return token::DOT;
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"," return token::COMMA;
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"->" return token::RARR;
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"AND" return token::AND;
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"OR" return token::OR;
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"XOR" return token::XOR;
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"IMPLIES" return token::IMPLIES;
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"~" return token::NOT;
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"EX" return token::EX;
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"EU" return token::EU;
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"EF" return token::EF;
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"EG" return token::EG;
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"AX" return token::AX;
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"AU" return token::AU;
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"AF" return token::AF;
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"AG" return token::AG;
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"X" return token::X;
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"U" return token::U;
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"F" return token::F;
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"G" return token::G;
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"K" return token::UK;
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"C" return token::UC;
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"D" return token::UD;
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"E" return token::UE;
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"NK" return token::NK;
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"NC" return token::NC;
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"ND" return token::ND;
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"NE" return token::NE;
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"empty" return token::EMPTY;
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"#".* ;
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{int} {
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errno = 0;
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long n = strtol(yytext, NULL, 10);
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if (! (INT_MIN <= n && n <= INT_MAX && errno != ERANGE))
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driver.error(*yylloc, "integer is out of range");
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yylval->ival = n;
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return token::NUMBER;
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}
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{id} {
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yylval->sval = new std::string(yytext);
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return token::IDENTIFIER;
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}
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. driver.error(*yylloc, "invalid character");
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%%
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void
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rsin_driver::scan_begin()
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{
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yy_flex_debug = trace_scanning;
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if (file.empty () || file == "-")
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yyin = stdin;
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else if (!(yyin = fopen (file.c_str (), "r")))
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{
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error("cannot open " + file + ": " + strerror(errno));
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exit(EXIT_FAILURE);
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}
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}
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void
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rsin_driver::scan_end()
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{
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fclose(yyin);
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}
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