source: tools/prettyprinter/lex.ll @ ec010a9

/* 
 * Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
 *
 * The contents of this file are covered under the licence agreement in the
 * file "LICENCE" distributed with Cforall.
 * 
 * lex.ll --
 * 
 * Author           : Peter A. Buhr
 * Created On       : Sat Dec 15 11:45:59 2001
 * Last Modified By : Peter A. Buhr
 * Last Modified On : Tue Aug 29 17:33:36 2017
 * Update Count     : 268
 */

%option stack
%option yylineno
%option nounput

%{
#include <list>
#include <string>
#include <iostream>
using namespace std;
#include "ParserTypes.h" 
#include "parser.hh" 

#define RETURN_TOKEN( kind ) yylval.tokenp = new Token( yytext, ws_list, kind ); return kind;

list<string> ws_list;
string comment_str;
string code_str;

// Stop warning due to incorrectly generated flex code.
#pragma GCC diagnostic ignored "-Wsign-compare"
%}

integer [0-9]+
identifier [a-zA-Z_$][0-9a-zA-Z_$]*

simple_escape ['"?\\]
escape_sequence [\\]{simple_escape}
c_char [^'\\\n]|{escape_sequence}
s_char [^"\\\n]|{escape_sequence}

%x C_COMMENT STR C_CODE

/* ---------------------------- Token Section ---------------------------- */
%%
<INITIAL,C_CODE>"/*" {                                                                  // C style comments */
#if defined(DEBUG_ALL) | defined(DEBUG_COMMENT)
    cerr << "\"/*\" : " << yytext << endl;
#endif
    if ( YYSTATE == C_CODE ) code_str += yytext;
    else comment_str += yytext;
    yy_push_state(C_COMMENT);
}
<C_COMMENT>(.|"\n")     {                                                                       // C style comments
#if defined(DEBUG_ALL) | defined(DEBUG_COMMENT)
    cerr << "<C_COMMENT>(.|\\n) : " << yytext << endl;
#endif
    if ( yy_top_state() == C_CODE ) code_str += yytext;
    else comment_str += yytext;
}
<C_COMMENT>"*/" {                                                                               // C style comments
#if defined(DEBUG_ALL) | defined(DEBUG_COMMENT)
        cerr << "<C_COMMENT>\"*/\" : " << yytext << endl;
#endif
        if ( yy_top_state() == C_CODE ) code_str += yytext;
        else {
                comment_str += yytext;
                //cerr << "C COMMENT : " << endl << comment_str << endl;
                ws_list.push_back( comment_str );
                comment_str = "";
        }
        yy_pop_state();
}

<INITIAL,C_CODE>"//"[^\n]*"\n" {                                                // C++ style comments
#if defined(DEBUG_ALL) | defined(DEBUG_COMMENT)
        cerr << "\"//\"[^\\n]*\"\n\" : " << yytext << endl;
#endif
        if ( YYSTATE == C_CODE ) code_str += yytext;
        else {
                comment_str += yytext;
                //cerr << "C++ COMMENT : " << endl << comment_str << endl;
                ws_list.push_back( comment_str );
                comment_str = "";
        }
}

";"                             { RETURN_TOKEN( ';' ) }
":"                             { RETURN_TOKEN( ':' ) }
"|"                             { RETURN_TOKEN( '|' ) }
","                             { RETURN_TOKEN( ',' ) }
"<"                             { RETURN_TOKEN( '<' ) }
">"                             { RETURN_TOKEN( '>' ) }

[[:space:]]+ {                                                                                  // [ \t\n]+
        ws_list.push_back( yytext );
        //cerr << "WS : " << "\"" << yytext << "\"" << endl;
}

<INITIAL>"{"    { RETURN_TOKEN( '{' ) }
<INITIAL>"}"    { RETURN_TOKEN( '}' ) }
<C_CODE>"{"     {
#if defined(DEBUG_ALL) | defined(DEBUG_C)
        cerr << "<C_CODE>. : " << yytext << endl;
#endif
        code_str += yytext;
        RETURN_TOKEN( '{' )
}
<C_CODE>"}"     {
#if defined(DEBUG_ALL) | defined(DEBUG_C)
        cerr << "<C_CODE>. : " << yytext << endl;
#endif
        code_str += yytext;
        RETURN_TOKEN( '}' )
}

"%%"                    { RETURN_TOKEN( MARK ) }
"%{"                    { RETURN_TOKEN( LCURL ) }
<C_CODE>"%}"    { RETURN_TOKEN( RCURL ) }

^"%union"       { RETURN_TOKEN( UNION ) }
^"%start"       { RETURN_TOKEN( START ) }
^"%token"       { RETURN_TOKEN( TOKEN ) }
^"%type"            { RETURN_TOKEN( TYPE ) }
^"%left"            { RETURN_TOKEN( LEFT ) }
^"%right"           { RETURN_TOKEN( RIGHT ) }
^"%nonassoc"    { RETURN_TOKEN( NONASSOC ) }
^"%precedence"  { RETURN_TOKEN( PRECEDENCE ) }
^"%pure_parser" { RETURN_TOKEN( PURE_PARSER ) }
^"%semantic_parser"     { RETURN_TOKEN( SEMANTIC_PARSER ) }
^"%expect"      { RETURN_TOKEN( EXPECT ) }
^"%thong"               { RETURN_TOKEN( THONG ) }

"%prec"                 { RETURN_TOKEN( PREC ) }

{integer}           { RETURN_TOKEN( INTEGER ); }
[']{c_char}[']  { RETURN_TOKEN( CHARACTER ); }
{identifier}    { RETURN_TOKEN( IDENTIFIER ); }

<C_CODE>["]{s_char}*["] {                                                               // hide braces "{}" in strings
#if defined(DEBUG_ALL) | defined(DEBUG_C)
        cerr << "<C_CODE>. : " << yytext << endl;
#endif
        code_str += yytext;
}

<C_CODE>(.|\n) {                                                                                // must be last rule of C_CODE
#if defined(DEBUG_ALL) | defined(DEBUG_C)
        cerr << "<C_CODE>. : " << yytext << endl;
#endif
        code_str += yytext;
}

                                /* unknown characters */
.                               { printf("unknown character(s):\"%s\" on line %d\n", yytext, yylineno); }
%%
void lexC(void) {
    BEGIN(C_CODE);
}

string lexYacc(void) {
    BEGIN(INITIAL);
    //cerr << "CODE: " << endl << code_str << endl;
    string temp( code_str );
    code_str = "";
    return temp;
}

// Local Variables: //
// mode: c++ //
// tab-width: 4 //
// compile-command: "make install" //
// End: //