From 3d5867d29e8932d238084e5c66dead1b4502f82f Mon Sep 17 00:00:00 2001 From: Randy Heit Date: Sun, 20 Mar 2016 10:27:12 -0500 Subject: [PATCH] Lemon update 2015-09-07 18:23:37 on branch lemon-update - For the Lemon-generated parser, add a new action type SHIFTREDUCE and use it to further compress the parser tables and improve parser performance. (user: drh) --- tools/lemon/lemon.c | 180 ++++++++++++++++++++++++++----------------- tools/lemon/lempar.c | 99 +++++++++++++++--------- 2 files changed, 173 insertions(+), 106 deletions(-) diff --git a/tools/lemon/lemon.c b/tools/lemon/lemon.c index e59cb4030e..6d7ae8acb0 100644 --- a/tools/lemon/lemon.c +++ b/tools/lemon/lemon.c @@ -220,7 +220,8 @@ enum e_action { RRCONFLICT, /* Was a reduce, but part of a conflict */ SH_RESOLVED, /* Was a shift. Precedence resolved conflict */ RD_RESOLVED, /* Was reduce. Precedence resolved conflict */ - NOT_USED /* Deleted by compression */ + NOT_USED, /* Deleted by compression */ + SHIFTREDUCE /* Shift first, then reduce */ }; /* Every shift or reduce operation is stored as one of the following */ @@ -244,7 +245,9 @@ struct state { struct action *ap; /* Array of actions for this state */ int nTknAct, nNtAct; /* Number of actions on terminals and nonterminals */ int iTknOfst, iNtOfst; /* yy_action[] offset for terminals and nonterms */ - int iDflt; /* Default action is reduce by this rule */ + int iDfltReduce; /* Default action is to REDUCE by this rule */ + struct rule *pDfltReduce;/* The default REDUCE rule. */ + int autoReduce; /* True if this is an auto-reduce state */ }; #define NO_OFFSET (-2147483647) @@ -264,6 +267,7 @@ struct lemon { struct state **sorted; /* Table of states sorted by state number */ struct rule *rule; /* List of all rules */ int nstate; /* Number of states */ + int nxstate; /* nstate with tail degenerate states removed */ int nrule; /* Number of rules */ int nsymbol; /* Number of terminal and nonterminal symbols */ int nterminal; /* Number of terminal symbols */ @@ -388,7 +392,7 @@ struct action *ap2; if( rc==0 ){ rc = (int)ap1->type - (int)ap2->type; } - if( rc==0 && ap1->type==REDUCE ){ + if( rc==0 && (ap1->type==REDUCE || ap1->type==SHIFTREDUCE) ){ rc = ap1->x.rp->index - ap2->x.rp->index; } if( rc==0 ){ @@ -1547,7 +1551,7 @@ int main(int argc, char **argv) stats_line("non-terminal symbols", lem.nsymbol - lem.nterminal); stats_line("total symbols", lem.nsymbol); stats_line("rules", lem.nrule); - stats_line("states", lem.nstate); + stats_line("states", lem.nxstate); stats_line("conflicts", lem.nconflict); stats_line("action table entries", lem.nactiontab); stats_line("total table size (bytes)", lem.tablesize); @@ -2953,24 +2957,25 @@ char *tag; int PrintAction( struct action *ap, /* The action to print */ FILE *fp, /* Print the action here */ - int indent, /* Indent by this amount */ - struct rule **apRule /* All rules by index */ + int indent /* Indent by this amount */ ){ int result = 1; switch( ap->type ){ case SHIFT: { struct state *stp = ap->x.stp; - fprintf(fp,"%*s shift %-7d",indent,ap->sp->name,stp->statenum); - if( stp->nTknAct==0 && stp->nNtAct==0 && apRule ){ - fprintf(fp,"then reduce %d: ", stp->iDflt); - RulePrint(fp, apRule[stp->iDflt], -1); - } + fprintf(fp,"%*s shift %-7d",indent,ap->sp->name,stp->statenum); break; } case REDUCE: { struct rule *rp = ap->x.rp; - fprintf(fp,"%*s reduce %-7d",indent,ap->sp->name,rp->index); - if( apRule ) RulePrint(fp, apRule[rp->index], -1); + fprintf(fp,"%*s reduce %-7d",indent,ap->sp->name,rp->index); + RulePrint(fp, rp, -1); + break; + } + case SHIFTREDUCE: { + struct rule *rp = ap->x.rp; + fprintf(fp,"%*s shift-reduce %-7d",indent,ap->sp->name,rp->index); + RulePrint(fp, rp, -1); break; } case ACCEPT: @@ -2981,16 +2986,16 @@ int PrintAction( break; case SRCONFLICT: case RRCONFLICT: - fprintf(fp,"%*s reduce %-7d ** Parsing conflict **", + fprintf(fp,"%*s reduce %-7d ** Parsing conflict **", indent,ap->sp->name,ap->x.rp->index); break; case SSCONFLICT: - fprintf(fp,"%*s shift %-7d ** Parsing conflict **", + fprintf(fp,"%*s shift %-7d ** Parsing conflict **", indent,ap->sp->name,ap->x.stp->statenum); break; case SH_RESOLVED: if( showPrecedenceConflict ){ - fprintf(fp,"%*s shift %-7d -- dropped by precedence", + fprintf(fp,"%*s shift %-7d -- dropped by precedence", indent,ap->sp->name,ap->x.stp->statenum); }else{ result = 0; @@ -3011,7 +3016,7 @@ int PrintAction( return result; } -/* Generate the "y.output" log file */ +/* Generate the "*.out" log file */ void ReportOutput(struct lemon *lemp) { int i; @@ -3019,20 +3024,10 @@ void ReportOutput(struct lemon *lemp) struct config *cfp; struct action *ap; FILE *fp; - struct rule **apRule; - apRule = malloc( sizeof(apRule[0])*(lemp->nrule+1) ); - if( apRule ){ - struct rule *x; - memset(apRule, 0, sizeof(apRule[0])*(lemp->nrule+1) ); - for(x=lemp->rule; x; x=x->next){ - assert( x->index>=0 && x->index<(lemp->nrule+1) ); - apRule[x->index] = x; - } - } fp = file_open(lemp,".out","wb"); if( fp==0 ) return; - for(i=0; instate; i++){ + for(i=0; inxstate; i++){ stp = lemp->sorted[i]; fprintf(fp,"State %d:\n",stp->statenum); if( lemp->basisflag ) cfp=stp->bp; @@ -3057,7 +3052,7 @@ void ReportOutput(struct lemon *lemp) } fprintf(fp,"\n"); for(ap=stp->ap; ap; ap=ap->next){ - if( PrintAction(ap,fp,30,apRule) ) fprintf(fp,"\n"); + if( PrintAction(ap,fp,30) ) fprintf(fp,"\n"); } fprintf(fp,"\n"); } @@ -3083,7 +3078,6 @@ void ReportOutput(struct lemon *lemp) fprintf(fp, "\n"); } fclose(fp); - free(apRule); return; } @@ -3145,10 +3139,11 @@ PRIVATE int compute_action(struct lemon *lemp, struct action *ap) { int act; switch( ap->type ){ - case SHIFT: act = ap->x.stp->statenum; break; - case REDUCE: act = ap->x.rp->index + lemp->nstate; break; - case ERROR: act = lemp->nstate + lemp->nrule; break; - case ACCEPT: act = lemp->nstate + lemp->nrule + 1; break; + case SHIFT: act = ap->x.stp->statenum; break; + case SHIFTREDUCE: act = ap->x.rp->index + lemp->nstate; break; + case REDUCE: act = ap->x.rp->index + lemp->nstate+lemp->nrule; break; + case ERROR: act = lemp->nstate + lemp->nrule*2; break; + case ACCEPT: act = lemp->nstate + lemp->nrule*2 + 1; break; default: act = -1; break; } return act; @@ -3777,7 +3772,7 @@ void ReportTable( minimum_size_type(0, lemp->nsymbol+1, &szCodeType)); lineno++; fprintf(out,"#define YYNOCODE %d\n",lemp->nsymbol+1); lineno++; fprintf(out,"#define YYACTIONTYPE %s\n", - minimum_size_type(0, lemp->nstate+lemp->nrule+5, &szActionType)); lineno++; + minimum_size_type(0,lemp->nstate+lemp->nrule*2+5,&szActionType)); lineno++; if( lemp->wildcard ){ fprintf(out,"#define YYWILDCARD %d\n", lemp->wildcard->index); lineno++; @@ -3814,36 +3809,24 @@ void ReportTable( if( mhflag ){ fprintf(out,"#endif\n"); lineno++; } - fprintf(out,"#define YYNSTATE %d\n",lemp->nstate); lineno++; - fprintf(out,"#define YYNRULE %d\n",lemp->nrule); lineno++; if( lemp->errsym->useCnt ){ - fprintf(out,"#define YYERRORSYMBOL %d\n",lemp->errsym->index); lineno++; - fprintf(out,"#define YYERRSYMDT yy%d\n",lemp->errsym->dtnum); lineno++; + fprintf(out,"#define YYERRORSYMBOL %d\n",lemp->errsym->index); lineno++; + fprintf(out,"#define YYERRSYMDT yy%d\n",lemp->errsym->dtnum); lineno++; } if( lemp->has_fallback ){ fprintf(out,"#define YYFALLBACK 1\n"); lineno++; } - tplt_xfer(lemp->name,in,out,&lineno); - /* Generate the action table and its associates: - ** - ** yy_action[] A single table containing all actions. - ** yy_lookahead[] A table containing the lookahead for each entry in - ** yy_action. Used to detect hash collisions. - ** yy_shift_ofst[] For each state, the offset into yy_action for - ** shifting terminals. - ** yy_reduce_ofst[] For each state, the offset into yy_action for - ** shifting non-terminals after a reduce. - ** yy_default[] Default action for each state. + /* Compute the action table, but do not output it yet. The action + ** table must be computed before generating the YYNSTATE macro because + ** we need to know how many states can be eliminated. */ - - /* Compute the actions on all states and count them up */ - ax = (struct axset *) calloc(lemp->nstate*2 , sizeof(ax[0])); + ax = (struct axset *) calloc(lemp->nxstate*2 , sizeof(ax[0])); if( ax==0 ){ fprintf(stderr,"malloc failed\n"); exit(1); } - for(i=0; instate; i++){ + for(i=0; inxstate; i++){ stp = lemp->sorted[i]; ax[i*2].stp = stp; ax[i*2].isTkn = 1; @@ -3854,15 +3837,12 @@ void ReportTable( } mxTknOfst = mnTknOfst = 0; mxNtOfst = mnNtOfst = 0; - - /* Compute the action table. In order to try to keep the size of the - ** action table to a minimum, the heuristic of placing the largest action - ** sets first is used. - */ - for(i=0; instate*2; i++) ax[i].iOrder = i; - qsort(ax, lemp->nstate*2, sizeof(ax[0]), axset_compare); + /* In an effort to minimize the action table size, use the heuristic + ** of placing the largest action sets first */ + for(i=0; inxstate*2; i++) ax[i].iOrder = i; + qsort(ax, lemp->nxstate*2, sizeof(ax[0]), axset_compare); pActtab = acttab_alloc(); - for(i=0; instate*2 && ax[i].nAction>0; i++){ + for(i=0; inxstate*2 && ax[i].nAction>0; i++){ stp = ax[i].stp; if( ax[i].isTkn ){ for(ap=stp->ap; ap; ap=ap->next){ @@ -3891,6 +3871,34 @@ void ReportTable( } free(ax); + /* Finish rendering the constants now that the action table has + ** been computed */ + fprintf(out,"#define YYNSTATE %d\n",lemp->nxstate); lineno++; + fprintf(out,"#define YYNRULE %d\n",lemp->nrule); lineno++; + fprintf(out,"#define YY_MAX_SHIFT %d\n",lemp->nstate-1); lineno++; + fprintf(out,"#define YY_MIN_SHIFTREDUCE %d\n",lemp->nstate); lineno++; + i = lemp->nstate + lemp->nrule; + fprintf(out,"#define YY_MAX_SHIFTREDUCE %d\n", i-1); lineno++; + fprintf(out,"#define YY_MIN_REDUCE %d\n", i); lineno++; + i = lemp->nstate + lemp->nrule*2; + fprintf(out,"#define YY_MAX_REDUCE %d\n", i-1); lineno++; + fprintf(out,"#define YY_ERROR_ACTION %d\n", i); lineno++; + fprintf(out,"#define YY_ACCEPT_ACTION %d\n", i+1); lineno++; + fprintf(out,"#define YY_NO_ACTION %d\n", i+2); lineno++; + tplt_xfer(lemp->name,in,out,&lineno); + + /* Now output the action table and its associates: + ** + ** yy_action[] A single table containing all actions. + ** yy_lookahead[] A table containing the lookahead for each entry in + ** yy_action. Used to detect hash collisions. + ** yy_shift_ofst[] For each state, the offset into yy_action for + ** shifting terminals. + ** yy_reduce_ofst[] For each state, the offset into yy_action for + ** shifting non-terminals after a reduce. + ** yy_default[] Default action for each state. + */ + /* Output the yy_action table */ lemp->nactiontab = n = acttab_size(pActtab); lemp->tablesize += n*szActionType; @@ -3929,7 +3937,7 @@ void ReportTable( /* Output the yy_shift_ofst[] table */ fprintf(out, "#define YY_SHIFT_USE_DFLT (%d)\n", mnTknOfst-1); lineno++; - n = lemp->nstate; + n = lemp->nxstate; while( n>0 && lemp->sorted[n-1]->iTknOfst==NO_OFFSET ) n--; fprintf(out, "#define YY_SHIFT_COUNT (%d)\n", n-1); lineno++; fprintf(out, "#define YY_SHIFT_MIN (%d)\n", mnTknOfst); lineno++; @@ -3955,7 +3963,7 @@ void ReportTable( /* Output the yy_reduce_ofst[] table */ fprintf(out, "#define YY_REDUCE_USE_DFLT (%d)\n", mnNtOfst-1); lineno++; - n = lemp->nstate; + n = lemp->nxstate; while( n>0 && lemp->sorted[n-1]->iNtOfst==NO_OFFSET ) n--; fprintf(out, "#define YY_REDUCE_COUNT (%d)\n", n-1); lineno++; fprintf(out, "#define YY_REDUCE_MIN (%d)\n", mnNtOfst); lineno++; @@ -3981,12 +3989,12 @@ void ReportTable( /* Output the default action table */ fprintf(out, "static const YYACTIONTYPE yy_default[] = {\n"); lineno++; - n = lemp->nstate; + n = lemp->nxstate; lemp->tablesize += n*szActionType; for(i=j=0; isorted[i]; if( j==0 ) fprintf(out," /* %5d */ ", i); - fprintf(out, " %4d,", stp->iDflt+n); + fprintf(out, " %4d,", stp->iDfltReduce+lemp->nstate+lemp->nrule); if( j==9 || i==n-1 ){ fprintf(out, "\n"); lineno++; j = 0; @@ -4221,7 +4229,7 @@ void CompressTables(struct lemon *lemp) struct state *stp; struct action *ap, *ap2; struct rule *rp, *rp2, *rbest; - int nbest, n; + int nbest, n, nshift; int i; int usesWildcard; @@ -4269,6 +4277,32 @@ void CompressTables(struct lemon *lemp) if( ap->type==REDUCE && ap->x.rp==rbest ) ap->type = NOT_USED; } stp->ap = Action_sort(stp->ap); + + for(ap=stp->ap; ap; ap=ap->next){ + if( ap->type==SHIFT ) break; + if( ap->type==REDUCE && ap->x.rp!=rbest ) break; + } + if( ap==0 ){ + stp->autoReduce = 1; + stp->pDfltReduce = rbest; + } + } + + /* Make a second pass over all states and actions. Convert + ** every action that is a SHIFT to an autoReduce state into + ** a SHIFTREDUCE action. + */ + for(i=0; instate; i++){ + stp = lemp->sorted[i]; + for(ap=stp->ap; ap; ap=ap->next){ + struct state *pNextState; + if( ap->type!=SHIFT ) continue; + pNextState = ap->x.stp; + if( pNextState->autoReduce && pNextState->pDfltReduce!=0 ){ + ap->type = SHIFTREDUCE; + ap->x.rp = pNextState->pDfltReduce; + } + } } } @@ -4309,17 +4343,19 @@ void ResortStates(struct lemon *lemp) for(i=0; instate; i++){ stp = lemp->sorted[i]; stp->nTknAct = stp->nNtAct = 0; - stp->iDflt = lemp->nrule; + stp->iDfltReduce = lemp->nrule; /* Init dflt action to "syntax error" */ stp->iTknOfst = NO_OFFSET; stp->iNtOfst = NO_OFFSET; for(ap=stp->ap; ap; ap=ap->next){ - if( compute_action(lemp,ap)>=0 ){ + int iAction = compute_action(lemp,ap); + if( iAction>=0 ){ if( ap->sp->indexnterminal ){ stp->nTknAct++; }else if( ap->sp->indexnsymbol ){ stp->nNtAct++; }else{ - stp->iDflt = compute_action(lemp, ap) - lemp->nstate; + assert( stp->autoReduce==0 || stp->pDfltReduce==ap->x.rp ); + stp->iDfltReduce = iAction - lemp->nstate - lemp->nrule; } } } @@ -4329,6 +4365,10 @@ void ResortStates(struct lemon *lemp) for(i=0; instate; i++){ lemp->sorted[i]->statenum = i; } + lemp->nxstate = lemp->nstate; + while( lemp->nxstate>1 && lemp->sorted[lemp->nxstate-1]->autoReduce ){ + lemp->nxstate--; + } } diff --git a/tools/lemon/lempar.c b/tools/lemon/lempar.c index 7979a7d2fd..90c410e62a 100644 --- a/tools/lemon/lempar.c +++ b/tools/lemon/lempar.c @@ -59,15 +59,19 @@ ** ParseARG_PDECL A parameter declaration for the %extra_argument ** ParseARG_STORE Code to store %extra_argument into yypParser ** ParseARG_FETCH Code to extract %extra_argument from yypParser -** YYNSTATE the combined number of states. -** YYNRULE the number of rules in the grammar ** YYERRORSYMBOL is the code number of the error symbol. If not ** defined, then do no error processing. +** YYNSTATE the combined number of states. +** YYNRULE the number of rules in the grammar +** YY_MAX_SHIFT Maximum value for shift actions +** YY_MIN_SHIFTREDUCE Minimum value for shift-reduce actions +** YY_MAX_SHIFTREDUCE Maximum value for shift-reduce actions +** YY_MIN_REDUCE Maximum value for reduce actions +** YY_ERROR_ACTION The yy_action[] code for syntax error +** YY_ACCEPT_ACTION The yy_action[] code for accept +** YY_NO_ACTION The yy_action[] code for no-op */ %% -#define YY_NO_ACTION (YYNSTATE+YYNRULE+2) -#define YY_ACCEPT_ACTION (YYNSTATE+YYNRULE+1) -#define YY_ERROR_ACTION (YYNSTATE+YYNRULE) /* The yyzerominor constant is used to initialize instances of ** YYMINORTYPE objects to zero. */ @@ -94,16 +98,20 @@ static const YYMINORTYPE yyzerominor = { 0 }; ** Suppose the action integer is N. Then the action is determined as ** follows ** -** 0 <= N < YYNSTATE Shift N. That is, push the lookahead +** 0 <= N <= YY_MAX_SHIFT Shift N. That is, push the lookahead ** token onto the stack and goto state N. ** -** YYNSTATE <= N < YYNSTATE+YYNRULE Reduce by rule N-YYNSTATE. +** N between YY_MIN_SHIFTREDUCE Shift to an arbitrary state then +** and YY_MAX_SHIFTREDUCE reduce by rule N-YY_MIN_SHIFTREDUCE. ** -** N == YYNSTATE+YYNRULE A syntax error has occurred. +** N between YY_MIN_REDUCE Reduce by rule N-YY_MIN_REDUCE +** and YY_MAX_REDUCE + +** N == YY_ERROR_ACTION A syntax error has occurred. ** -** N == YYNSTATE+YYNRULE+1 The parser accepts its input. +** N == YY_ACCEPT_ACTION The parser accepts its input. ** -** N == YYNSTATE+YYNRULE+2 No such action. Denotes unused +** N == YY_NO_ACTION No such action. Denotes unused ** slots in the yy_action[] table. ** ** The action table is constructed as a single large table named yy_action[]. @@ -497,9 +505,9 @@ static void yyStackOverflow(yyParser *yypParser, YYMINORTYPE *yypMinor){ } /* -** Perform a shift action. +** Perform a shift action. Return the number of errors. */ -static void yy_shift( +static int yy_shift( yyParser *yypParser, /* The parser to be shifted */ int yyNewState, /* The new state to shift in */ int yyMajor, /* The major token to shift in */ @@ -515,14 +523,14 @@ static void yy_shift( #if YYSTACKDEPTH>0 if( yypParser->yyidx>=YYSTACKDEPTH ){ yyStackOverflow(yypParser, yypMinor); - return; + return 1; } #else if( yypParser->yyidx>=yypParser->yystksz ){ yyGrowStack(yypParser); if( yypParser->yyidx>=yypParser->yystksz ){ yyStackOverflow(yypParser, yypMinor); - return; + return 1; } } #endif @@ -533,13 +541,18 @@ static void yy_shift( #ifndef NDEBUG if( yyTraceFILE && yypParser->yyidx>0 ){ int i; - fprintf(yyTraceFILE,"%sShift %d\n",yyTracePrompt,yyNewState); - fprintf(yyTraceFILE,"%sStack:",yyTracePrompt); - for(i=1; i<=yypParser->yyidx; i++) - fprintf(yyTraceFILE," (%d)%s",yypParser->yystack[i].stateno,yyTokenName[yypParser->yystack[i].major]); - fprintf(yyTraceFILE,"\n"); + if( yyNewStateyyidx; i++) + fprintf(yyTraceFILE," %s",yyTokenName[yypParser->yystack[i].major]); + fprintf(yyTraceFILE,"\n"); + }else{ + fprintf(yyTraceFILE,"%sShift *\n",yyTracePrompt); + } } #endif + return 0; } /* The following table contains information about every rule that @@ -572,8 +585,9 @@ static void yy_reduce( #ifndef NDEBUG if( yyTraceFILE && yyruleno>=0 && yyruleno<(int)(sizeof(yyRuleName)/sizeof(yyRuleName[0])) ){ - fprintf(yyTraceFILE, "%sReduce [%s].\n", yyTracePrompt, - yyRuleName[yyruleno]); + yysize = yyRuleInfo[yyruleno].nrhs; + fprintf(yyTraceFILE, "%sReduce [%s] -> state %d.\n", yyTracePrompt, + yyRuleName[yyruleno], yymsp[-yysize].stateno); } #endif /* NDEBUG */ @@ -609,9 +623,8 @@ static void yy_reduce( yysize = yyRuleInfo[yyruleno].nrhs; yypParser->yyidx -= yysize; yyact = yy_find_reduce_action(yymsp[-yysize].stateno,(YYCODETYPE)yygoto); - if( yyact < YYNSTATE ){ -#ifdef NDEBUG - /* If we are not debugging and the reduce action popped at least + if( yyact < YY_MAX_SHIFTREDUCE ){ + /* If the reduce action popped at least ** one element off the stack, then we can push the new element back ** onto the stack here, and skip the stack overflow test in yy_shift(). ** That gives a significant speed improvement. */ @@ -621,13 +634,19 @@ static void yy_reduce( yymsp->stateno = (YYACTIONTYPE)yyact; yymsp->major = (YYCODETYPE)yygoto; yymsp->minor = yygotominor; - }else +#ifndef NDEBUG + if( yyTraceFILE ){ + fprintf(yyTraceFILE,"%sShift %d\n",yyTracePrompt,yyact); + } #endif - { - yy_shift(yypParser,yyact,yygoto,&yygotominor); + }else{ + if( yy_shift(yypParser,yyact,yygoto,&yygotominor) ) yyact = 0; + } + if( yyact>=YY_MIN_SHIFTREDUCE ){ + yy_reduce(yypParser, yyact - YY_MIN_SHIFTREDUCE); } }else{ - assert( yyact == YYNSTATE + YYNRULE + 1 ); + assert( yyact == YY_ACCEPT_ACTION ); yy_accept(yypParser); } } @@ -747,13 +766,16 @@ void Parse( do{ yyact = yy_find_shift_action(yypParser,(YYCODETYPE)yymajor); - if( yyactyyerrcnt--; - yymajor = YYNOCODE; - }else if( yyact < YYNSTATE + YYNRULE ){ - yy_reduce(yypParser,yyact-YYNSTATE); + if( yyact <= YY_MAX_SHIFTREDUCE ){ + if( yy_shift(yypParser,yyact,yymajor,&yyminorunion)==0 ){ + yypParser->yyerrcnt--; + yymajor = YYNOCODE; + if( yyact > YY_MAX_SHIFT ){ + yy_reduce(yypParser, yyact-YY_MIN_SHIFTREDUCE); + } + } + }else if( yyact <= YY_MAX_REDUCE ){ + yy_reduce(yypParser,yyact-YY_MIN_REDUCE); }else{ #ifdef YYERRORSYMBOL int yymx; @@ -803,7 +825,7 @@ void Parse( yymx != YYERRORSYMBOL && (yyact = yy_find_reduce_action( yypParser->yystack[yypParser->yyidx].stateno, - YYERRORSYMBOL)) >= YYNSTATE + YYERRORSYMBOL)) >= YY_MIN_REDUCE ){ yy_pop_parser_stack(yypParser); } @@ -853,5 +875,10 @@ void Parse( #endif } }while( yymajor!=YYNOCODE && yypParser->yyidx>=0 ); +#ifndef NDEBUG + if( yyTraceFILE ){ + fprintf(yyTraceFILE,"%sReturn\n",yyTracePrompt); + } +#endif return; }