Coding parsers…

Posted on February 12, 2015 by bierpilot

…wird mit der libphorward jetzt immer geiler! Seit gestern gibts ein neues README-File mit schönem Demoprogramm und neuer Featureliste… damit mal Tacheles gesprochen wird, wozu das Ding eigentlich da ist:

#include <phorward.h>

int main()
{
    ppgram* g;
    char*   s = "1+2*(3+4)+5";
    char*   e;
    parray* a;

    g = pp_gram_create(
        "%emitall"
        "f: /[0-9]+/ | '(' e ')';"
        "t: t '*' f | f ;"
        "e: e '+' t | t ;" );

    if( !pp_lr_parse( &a, g, s, &e ) )
        return 1; /* parse error */

    pp_ast_simplify( a );
    return 0;
}

#include <phorward.h>

int main()

{

ppgram* g;

char* s = "1+2*(3+4)+5";

char* e;

parray* a;

g = pp_gram_create(

"%emitall"

"f: /[0-9]+/ | '(' e ')';"

"t: t '*' f | f ;"

"e: e '+' t | t ;" );

if( !pp_lr_parse( &a, g, s, &e ) )

return 1; /* parse error */

pp_ast_simplify( a );

return 0;

}

Schneller kann man keinen Parser definieren, ausführen und den Parsebaum als Ergebnis sehen… und alles direkt im C-Code!

Alleinstellungsmerkmal?? 🙂 I hope so…

Schönere Grammatik ;)

Posted on February 10, 2015 by bierpilot

Soo die libphorward hat jetzt auch eine schönere Grammatik für ihre BNF-Sprache. Die bereits beim self-hosting Prozess verwendete Grammatik sieht jetzt so aus:

$           /[ \t\r\n]+/                                            %ignore;

$ccl        /'.*'/                                                  %emit 1;
$string     /".*"/                                                  %emit 2;
$regex      /\/(\\.|[^\\\/])*\//                                    %emit 3;
$ident      /[A-Za-z_][A-Za-z0-9_]*/                                %emit 10;
$int        /[0-9]+/                                                %emit 11;

symbol      : ident | ccl | string | regex | inline                 %emit 20;

mod_kleene  : symbol '*'                                            %emit 25;
mod_positive: symbol '+'                                            %emit 26;
mod_optional: symbol '?'                                            %emit 27;
modifier    : mod_kleene | mod_positive | mod_optional | symbol ;

sequence    : sequence modifier | modifier ;
alternative : sequence |                                            %emit 30;
alternation : alternation '|' alternative | alternative ;

emit        : "emit" int?                                           %emit 42;
flag        : "noemit" | "goal" | "ignore" | "lexem"                %emit 40;
emitflag    : emit | flag ;

flags       : flags '%' emitflag+
            | '%' emitflag+
            ;

nontermdef  : ident ':' alternation flags? ';'                      %emit 31;
inline      : '(' alternation ')'                                   %emit 32;

termdef     : '$' ident? ( ccl | string | regex ) flags? ';'        %emit 35;

gflag       : "emitall" | "emitnone" | "lrec" | "rrec"              %emit 41;
gflags      : gflags '%' gflag+ | '%' gflag+ ;

definition  : nontermdef | termdef | gflags ;

grammar     : definition+                                           %goal;

$ /[ \t\r\n]+/ %ignore;

$ccl /'.*'/ %emit 1;

$string /".*"/ %emit 2;

$regex /\/(\\.|[^\\\/])*\// %emit 3;

$ident /[A-Za-z_][A-Za-z0-9_]*/ %emit 10;

$int /[0-9]+/ %emit 11;

symbol : ident | ccl | string | regex | inline %emit 20;

mod_kleene : symbol '*' %emit 25;

mod_positive: symbol '+' %emit 26;

mod_optional: symbol '?' %emit 27;

modifier : mod_kleene | mod_positive | mod_optional | symbol ;

sequence : sequence modifier | modifier ;

alternative : sequence | %emit 30;

alternation : alternation '|' alternative | alternative ;

emit : "emit" int? %emit 42;

flag : "noemit" | "goal" | "ignore" | "lexem" %emit 40;

emitflag : emit | flag ;

flags : flags '%' emitflag+

| '%' emitflag+

;

nontermdef : ident ':' alternation flags? ';' %emit 31;

inline : '(' alternation ')' %emit 32;

termdef : '$' ident? ( ccl | string | regex ) flags? ';' %emit 35;

gflag : "emitall" | "emitnone" | "lrec" | "rrec" %emit 41;

gflags : gflags '%' gflag+ | '%' gflag+ ;

definition : nontermdef | termdef | gflags ;

grammar : definition+ %goal;

Kann sich doch eher sehen lassen, oder? Die $-Zeichen definieren Terminaldeklarationen, es sind auch anonyme Terminaldeklarationen erlaubt, und Inline-Terminals werden jetzt über einen Pattern-Matching-Mechanismus auf existenz geprüft, so dass diese nicht extra definiert werden müssen (so wie % und ;).

Ausserdem ist die Entwicklung jetzt erstmal nach Bitbucket umgezogen, weil Sourceforge der Meinung war, meinen Benutzernamen mit dem Namen eines indischen Java-Entwicklers, mit dem ich nichts gemeinsam habe, zu verlinken, weil da irgendein blöder Bug drin ist. Ausserdem benutzen wir Bitbucket auch bei mausbrand, und bin damit bisher sehr gut gefahren :).

libphorward selfhosted!

Posted on January 26, 2015 by bierpilot

Seit Freitag ist die libphorward nun self-hosted.

Was heißt das nun konkret? Nun es hört sich ein wenig an wie autofellatio, ist aber noch viel, viel geiler! Die libphorward wurde nun um ein weiteres Modul, das Programm ppgram2c erweitert.

ppgram2c ist ein Code-Generator, welcher eine Backus-Naur-notierte Parser-Beschreibung aus einer Datei einliest und anschließend als C-Programm wieder ausgibt, also sozusagen die Funktionsaufrufe, die nötig sind, um die gewünschte Grammatik direkt in C mit dem libphorward Funktion des parser-Moduls zu definieren.

Aus der BNF-Notation für die eigene BNF-Sprache mit der Syntax:

kw_emit     = "emit" ;
kw_noemit   = "noemit" ;
kw_goal     = "goal" ;
kw_ws       = "whitespace" ;
kw_emitall  = "emitall" ;
kw_emitnone = "emitnone" ;
kw_lrec     = "lrec";
kw_rrec     = "rrec";

ws          = /[ \t\r\n]+/                                          %whitespace;

ccl         = /'.*'/                                                %emit 1;
string      = /".*"/                                                %emit 2;
regex       = /\/(\\.|[^\\\/])*\//                                  %emit 3;
ident       = /[A-Za-z_][A-Za-z0-9_]*/                              %emit 10;
int         = /[0-9]+/                                              %emit 11;

equal       = '=' ;
percent     = '%' ;
semicolon   = ';' ;

symbol      : ident | ccl | string | regex | inline                 %emit 20;

mod_kleene  : symbol '*'                                            %emit 25;
mod_positive: symbol '+'                                            %emit 26;
mod_optional: symbol '?'                                            %emit 27;
modifier    : mod_kleene | mod_positive | mod_optional | symbol ;

sequence    : sequence modifier | modifier ;
alternative : sequence |                                            %emit 30;
alternation : alternation '|' alternative | alternative ;

emit        : kw_emit int?                                          %emit 42;
flag        : kw_noemit | kw_goal | kw_ws                           %emit 40;
emitflag    : emit | flag ;

flags       : flags percent emitflag+
            | percent emitflag+
            ;

nontermdef  : ident ':' alternation flags? semicolon                %emit 31;
inline      : '(' alternation ')'                                   %emit 32;

termdef     : ident equal ccl flags? semicolon
            | ident equal string flags? semicolon
            | ident equal regex flags? semicolon
                                                                    %emit 35;

gflag       : kw_emitall | kw_emitnone | kw_lrec | kw_rrec          %emit 41;
gflags      : gflags percent gflag+ | percent gflag+ ;

definition  : nontermdef | termdef | gflags ;

grammar     : definition+                                           %goal;

kw_emit = "emit" ;

kw_noemit = "noemit" ;

kw_goal = "goal" ;

kw_ws = "whitespace" ;

kw_emitall = "emitall" ;

kw_emitnone = "emitnone" ;

kw_lrec = "lrec";

kw_rrec = "rrec";

ws = /[ \t\r\n]+/ %whitespace;

ccl = /'.*'/ %emit 1;

string = /".*"/ %emit 2;

regex = /\/(\\.|[^\\\/])*\// %emit 3;

ident = /[A-Za-z_][A-Za-z0-9_]*/ %emit 10;

int = /[0-9]+/ %emit 11;

equal = '=' ;

percent = '%' ;

semicolon = ';' ;

symbol : ident | ccl | string | regex | inline %emit 20;

mod_kleene : symbol '*' %emit 25;

mod_positive: symbol '+' %emit 26;

mod_optional: symbol '?' %emit 27;

modifier : mod_kleene | mod_positive | mod_optional | symbol ;

sequence : sequence modifier | modifier ;

alternative : sequence | %emit 30;

alternation : alternation '|' alternative | alternative ;

emit : kw_emit int? %emit 42;

flag : kw_noemit | kw_goal | kw_ws %emit 40;

emitflag : emit | flag ;

flags : flags percent emitflag+

| percent emitflag+

;

nontermdef : ident ':' alternation flags? semicolon %emit 31;

inline : '(' alternation ')' %emit 32;

termdef : ident equal ccl flags? semicolon

| ident equal string flags? semicolon

| ident equal regex flags? semicolon

%emit 35;

gflag : kw_emitall | kw_emitnone | kw_lrec | kw_rrec %emit 41;

gflags : gflags percent gflag+ | percent gflag+ ;

definition : nontermdef | termdef | gflags ;

grammar : definition+ %goal;

Ich muss gestehen, das diese Grammatik noch recht unschön definiert ist, was aber daran liegt, das noch ein paar Bugs vorliegen (equal, percent und semicolon mussten wegen Mehrfachverwendung als eigene Symbole definiert werden, sollte später so nicht sein).

Aus dieser Grammatik erzeugt ppgram2c nun folgenden C-Code (mit ein wenig awk-Hokuspokus drumherum):

/* -MODULE----------------------------------------------------------------------
Phorward Foundation Toolkit
Copyright (C) 2006-2015 by Phorward Software Technologies, Jan Max Meyer
http://www.phorward-software.com ++ contact<at>phorward<dash>software<dot>com
All rights reserved. See LICENSE for more information.

File:   comp.gram.c
Usage:  Self-hosted grammar for ppgram.
----------------------------------------------------------------------------- */

/*
    This file was automatically generated by pinclude.
    DO NOT CHANGE THIS FILE MANUALLY. IT WILL GO AWAY!
*/


#include "phorward.h"

void pp_bnf_define( ppgram* g )
{

    ppsym*  sym[ 49 ];

    

    sym[ 1 ] = pp_sym_create( g, PPSYMTYPE_STRING, "kw_emit", "emit" );

    sym[ 2 ] = pp_sym_create( g, PPSYMTYPE_STRING, "kw_noemit", "noemit" );

    sym[ 3 ] = pp_sym_create( g, PPSYMTYPE_STRING, "kw_goal", "goal" );

    sym[ 4 ] = pp_sym_create( g, PPSYMTYPE_STRING, "kw_ws", "whitespace" );

    sym[ 5 ] = pp_sym_create( g, PPSYMTYPE_STRING, "kw_emitall", "emitall" );

    sym[ 6 ] = pp_sym_create( g, PPSYMTYPE_STRING, "kw_emitnone", "emitnone" );

    sym[ 7 ] = pp_sym_create( g, PPSYMTYPE_STRING, "kw_lrec", "lrec" );

    sym[ 8 ] = pp_sym_create( g, PPSYMTYPE_STRING, "kw_rrec", "rrec" );

    sym[ 9 ] = pp_sym_create( g, PPSYMTYPE_REGEX, "ws", "[\\t\\n\\r ]+" );
    sym[ 9 ]->flags |= PPFLAG_WHITESPACE;

    sym[ 10 ] = pp_sym_create( g, PPSYMTYPE_REGEX, "ccl", "'.*'" );
    sym[ 10 ]->emit = 1;

    sym[ 11 ] = pp_sym_create( g, PPSYMTYPE_REGEX, "string", "\".*\"" );
    sym[ 11 ]->emit = 2;

    sym[ 12 ] = pp_sym_create( g, PPSYMTYPE_REGEX, "regex", "/(\\\\.|[^/\\\\])*/" );
    sym[ 12 ]->emit = 3;

    sym[ 13 ] = pp_sym_create( g, PPSYMTYPE_REGEX, "ident", "[A-Z_a-z][0-9A-Z_a-z]*" );
    sym[ 13 ]->emit = 10;

    sym[ 14 ] = pp_sym_create( g, PPSYMTYPE_REGEX, "int", "[0-9]+" );
    sym[ 14 ]->emit = 11;

    sym[ 15 ] = pp_sym_create( g, PPSYMTYPE_CCL, "equal", "=" );

    sym[ 16 ] = pp_sym_create( g, PPSYMTYPE_CCL, "percent", "%" );

    sym[ 17 ] = pp_sym_create( g, PPSYMTYPE_CCL, "semicolon", ";" );

    sym[ 18 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "symbol", (char*)NULL );
    sym[ 18 ]->emit = 20;

    sym[ 19 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "inline", (char*)NULL );
    sym[ 19 ]->emit = 32;

    sym[ 20 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "mod_kleene", (char*)NULL );
    sym[ 20 ]->emit = 25;

    sym[ 21 ] = pp_sym_create( g, PPSYMTYPE_CCL, (char*)NULL, "*" );

    sym[ 22 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "mod_positive", (char*)NULL );
    sym[ 22 ]->emit = 26;

    sym[ 23 ] = pp_sym_create( g, PPSYMTYPE_CCL, (char*)NULL, "+" );

    sym[ 24 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "mod_optional", (char*)NULL );
    sym[ 24 ]->emit = 27;

    sym[ 25 ] = pp_sym_create( g, PPSYMTYPE_CCL, (char*)NULL, "?" );

    sym[ 26 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "modifier", (char*)NULL );

    sym[ 27 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "sequence", (char*)NULL );

    sym[ 28 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "alternative", (char*)NULL );
    sym[ 28 ]->emit = 30;

    sym[ 29 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "alternation", (char*)NULL );

    sym[ 30 ] = pp_sym_create( g, PPSYMTYPE_CCL, (char*)NULL, "|" );

    sym[ 31 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "emit", (char*)NULL );
    sym[ 31 ]->emit = 42;

    sym[ 32 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "int?", (char*)NULL );

    sym[ 33 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "flag", (char*)NULL );
    sym[ 33 ]->emit = 40;

    sym[ 34 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "emitflag", (char*)NULL );

    sym[ 35 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "flags", (char*)NULL );

    sym[ 36 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "emitflag+", (char*)NULL );

    sym[ 37 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "nontermdef", (char*)NULL );
    sym[ 37 ]->emit = 31;

    sym[ 38 ] = pp_sym_create( g, PPSYMTYPE_CCL, (char*)NULL, ":" );

    sym[ 39 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "flags?", (char*)NULL );

    sym[ 40 ] = pp_sym_create( g, PPSYMTYPE_CCL, (char*)NULL, "(" );

    sym[ 41 ] = pp_sym_create( g, PPSYMTYPE_CCL, (char*)NULL, ")" );

    sym[ 42 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "termdef", (char*)NULL );
    sym[ 42 ]->emit = 35;

    sym[ 43 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "gflag", (char*)NULL );
    sym[ 43 ]->emit = 41;

    sym[ 44 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "gflags", (char*)NULL );

    sym[ 45 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "gflag+", (char*)NULL );

    sym[ 46 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "definition", (char*)NULL );

    sym[ 47 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "grammar", (char*)NULL );
    g->goal = sym[ 47 ];

    sym[ 48 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "definition+", (char*)NULL );


    

    pp_prod_create( g, sym[ 18 ] ,
        sym[ 19 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 18 ] ,
        sym[ 12 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 18 ] ,
        sym[ 11 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 18 ] ,
        sym[ 10 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 18 ] ,
        sym[ 13 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 20 ] ,
        sym[ 18 ], 
        sym[ 21 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 22 ] ,
        sym[ 18 ], 
        sym[ 23 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 24 ] ,
        sym[ 18 ], 
        sym[ 25 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 26 ] ,
        sym[ 18 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 26 ] ,
        sym[ 24 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 26 ] ,
        sym[ 22 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 26 ] ,
        sym[ 20 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 27 ] ,
        sym[ 26 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 27 ] ,
        sym[ 27 ], 
        sym[ 26 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 28 ] , (ppsym*)NULL );

    pp_prod_create( g, sym[ 28 ] ,
        sym[ 27 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 29 ] ,
        sym[ 28 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 29 ] ,
        sym[ 29 ], 
        sym[ 30 ], 
        sym[ 28 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 32 ] ,
        sym[ 14 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 32 ] , (ppsym*)NULL );

    pp_prod_create( g, sym[ 31 ] ,
        sym[ 1 ], 
        sym[ 32 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 33 ] ,
        sym[ 4 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 33 ] ,
        sym[ 3 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 33 ] ,
        sym[ 2 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 34 ] ,
        sym[ 33 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 34 ] ,
        sym[ 31 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 36 ] ,
        sym[ 36 ], 
        sym[ 34 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 36 ] ,
        sym[ 34 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 35 ] ,
        sym[ 16 ], 
        sym[ 36 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 35 ] ,
        sym[ 35 ], 
        sym[ 16 ], 
        sym[ 36 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 39 ] ,
        sym[ 35 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 39 ] , (ppsym*)NULL );

    pp_prod_create( g, sym[ 37 ] ,
        sym[ 13 ], 
        sym[ 38 ], 
        sym[ 29 ], 
        sym[ 39 ], 
        sym[ 17 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 19 ] ,
        sym[ 40 ], 
        sym[ 29 ], 
        sym[ 41 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 42 ] ,
        sym[ 13 ], 
        sym[ 15 ], 
        sym[ 12 ], 
        sym[ 39 ], 
        sym[ 17 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 42 ] ,
        sym[ 13 ], 
        sym[ 15 ], 
        sym[ 11 ], 
        sym[ 39 ], 
        sym[ 17 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 42 ] ,
        sym[ 13 ], 
        sym[ 15 ], 
        sym[ 10 ], 
        sym[ 39 ], 
        sym[ 17 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 43 ] ,
        sym[ 8 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 43 ] ,
        sym[ 7 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 43 ] ,
        sym[ 6 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 43 ] ,
        sym[ 5 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 45 ] ,
        sym[ 45 ], 
        sym[ 43 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 45 ] ,
        sym[ 43 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 44 ] ,
        sym[ 16 ], 
        sym[ 45 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 44 ] ,
        sym[ 44 ], 
        sym[ 16 ], 
        sym[ 45 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 46 ] ,
        sym[ 44 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 46 ] ,
        sym[ 42 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 46 ] ,
        sym[ 37 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 48 ] ,
        sym[ 48 ], 
        sym[ 46 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 48 ] ,
        sym[ 46 ], 
        (ppsym*)NULL );

    pp_prod_create( g, sym[ 47 ] ,
        sym[ 48 ], 
        (ppsym*)NULL );



}

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/* -MODULE----------------------------------------------------------------------

Phorward Foundation Toolkit

http://www.phorward-software.com ++ contact<at>phorward<dash>software<dot>com

File: comp.gram.c

Usage: Self-hosted grammar for ppgram.

----------------------------------------------------------------------------- */

This file was automatically generated by pinclude.

DO NOT CHANGE THIS FILE MANUALLY. IT WILL GO AWAY!

#include "phorward.h"

void pp_bnf_define( ppgram* g )

{

ppsym* sym[ 49 ];

sym[ 1 ] = pp_sym_create( g, PPSYMTYPE_STRING, "kw_emit", "emit" );

sym[ 2 ] = pp_sym_create( g, PPSYMTYPE_STRING, "kw_noemit", "noemit" );

sym[ 3 ] = pp_sym_create( g, PPSYMTYPE_STRING, "kw_goal", "goal" );

sym[ 4 ] = pp_sym_create( g, PPSYMTYPE_STRING, "kw_ws", "whitespace" );

sym[ 5 ] = pp_sym_create( g, PPSYMTYPE_STRING, "kw_emitall", "emitall" );

sym[ 6 ] = pp_sym_create( g, PPSYMTYPE_STRING, "kw_emitnone", "emitnone" );

sym[ 7 ] = pp_sym_create( g, PPSYMTYPE_STRING, "kw_lrec", "lrec" );

sym[ 8 ] = pp_sym_create( g, PPSYMTYPE_STRING, "kw_rrec", "rrec" );

sym[ 9 ] = pp_sym_create( g, PPSYMTYPE_REGEX, "ws", "[\\t\\n\\r ]+" );

sym[ 9 ]->flags |= PPFLAG_WHITESPACE;

sym[ 10 ] = pp_sym_create( g, PPSYMTYPE_REGEX, "ccl", "'.*'" );

sym[ 10 ]->emit = 1;

sym[ 11 ] = pp_sym_create( g, PPSYMTYPE_REGEX, "string", "\".*\"" );

sym[ 11 ]->emit = 2;

sym[ 12 ] = pp_sym_create( g, PPSYMTYPE_REGEX, "regex", "/(\\\\.|[^/\\\\])*/" );

sym[ 12 ]->emit = 3;

sym[ 13 ] = pp_sym_create( g, PPSYMTYPE_REGEX, "ident", "[A-Z_a-z][0-9A-Z_a-z]*" );

sym[ 13 ]->emit = 10;

sym[ 14 ] = pp_sym_create( g, PPSYMTYPE_REGEX, "int", "[0-9]+" );

sym[ 14 ]->emit = 11;

sym[ 15 ] = pp_sym_create( g, PPSYMTYPE_CCL, "equal", "=" );

sym[ 16 ] = pp_sym_create( g, PPSYMTYPE_CCL, "percent", "%" );

sym[ 17 ] = pp_sym_create( g, PPSYMTYPE_CCL, "semicolon", ";" );

sym[ 18 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "symbol", (char*)NULL );

sym[ 18 ]->emit = 20;

sym[ 19 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "inline", (char*)NULL );

sym[ 19 ]->emit = 32;

sym[ 20 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "mod_kleene", (char*)NULL );

sym[ 20 ]->emit = 25;

sym[ 21 ] = pp_sym_create( g, PPSYMTYPE_CCL, (char*)NULL, "*" );

sym[ 22 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "mod_positive", (char*)NULL );

sym[ 22 ]->emit = 26;

sym[ 23 ] = pp_sym_create( g, PPSYMTYPE_CCL, (char*)NULL, "+" );

sym[ 24 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "mod_optional", (char*)NULL );

sym[ 24 ]->emit = 27;

sym[ 25 ] = pp_sym_create( g, PPSYMTYPE_CCL, (char*)NULL, "?" );

sym[ 26 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "modifier", (char*)NULL );

sym[ 27 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "sequence", (char*)NULL );

sym[ 28 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "alternative", (char*)NULL );

sym[ 28 ]->emit = 30;

sym[ 29 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "alternation", (char*)NULL );

sym[ 30 ] = pp_sym_create( g, PPSYMTYPE_CCL, (char*)NULL, "|" );

sym[ 31 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "emit", (char*)NULL );

sym[ 31 ]->emit = 42;

sym[ 32 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "int?", (char*)NULL );

sym[ 33 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "flag", (char*)NULL );

sym[ 33 ]->emit = 40;

sym[ 34 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "emitflag", (char*)NULL );

sym[ 35 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "flags", (char*)NULL );

sym[ 36 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "emitflag+", (char*)NULL );

sym[ 37 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "nontermdef", (char*)NULL );

sym[ 37 ]->emit = 31;

sym[ 38 ] = pp_sym_create( g, PPSYMTYPE_CCL, (char*)NULL, ":" );

sym[ 39 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "flags?", (char*)NULL );

sym[ 40 ] = pp_sym_create( g, PPSYMTYPE_CCL, (char*)NULL, "(" );

sym[ 41 ] = pp_sym_create( g, PPSYMTYPE_CCL, (char*)NULL, ")" );

sym[ 42 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "termdef", (char*)NULL );

sym[ 42 ]->emit = 35;

sym[ 43 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "gflag", (char*)NULL );

sym[ 43 ]->emit = 41;

sym[ 44 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "gflags", (char*)NULL );

sym[ 45 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "gflag+", (char*)NULL );

sym[ 46 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "definition", (char*)NULL );

sym[ 47 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "grammar", (char*)NULL );

g->goal = sym[ 47 ];

sym[ 48 ] = pp_sym_create( g, PPSYMTYPE_NONTERM, "definition+", (char*)NULL );