143 lines
2.9 KiB
Text
143 lines
2.9 KiB
Text
exec: iffable
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| SDO end_spec intonlyon label intonlyoff opt_comma dospecw
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{
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if($4->labdefined)
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execerr("no backward DO loops", CNULL);
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$4->blklevel = blklevel+1;
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exdo($4->labelno, NPNULL, $7);
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}
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| SDO end_spec opt_comma dospecw
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{
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exdo((int)(ctls - ctlstack - 2), NPNULL, $4);
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NOEXT("DO without label");
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}
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| SENDDO
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{ exenddo(NPNULL); }
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| logif iffable
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{ exendif(); thiswasbranch = NO; }
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| logif STHEN
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| SELSEIF end_spec SLPAR expr SRPAR STHEN
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{ exelif($4); lastwasbranch = NO; }
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| SELSE end_spec
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{ exelse(); lastwasbranch = NO; }
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| SENDIF end_spec
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{ exendif(); lastwasbranch = NO; }
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;
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logif: SLOGIF end_spec SLPAR expr SRPAR
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{ exif($4); }
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;
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dospec: name SEQUALS exprlist
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{ $$ = mkchain((char *)$1, $3); }
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;
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dospecw: dospec
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| SWHILE SLPAR expr SRPAR
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{ $$ = mkchain(CNULL, (chainp)$3); }
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;
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iffable: let lhs SEQUALS expr
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{ exequals((struct Primblock *)$2, $4); }
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| SASSIGN end_spec assignlabel STO name
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{ exassign($5, $3); }
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| SCONTINUE end_spec
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| goto
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| io
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{ inioctl = NO; }
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| SARITHIF end_spec SLPAR expr SRPAR label SCOMMA label SCOMMA label
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{ exarif($4, $6, $8, $10); thiswasbranch = YES; }
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| call
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{ excall($1, LBNULL, 0, labarray); }
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| call SLPAR SRPAR
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{ excall($1, LBNULL, 0, labarray); }
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| call SLPAR callarglist SRPAR
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{ if(nstars < MAXLABLIST)
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excall($1, mklist(revchain($3)), nstars, labarray);
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else
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err("too many alternate returns");
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}
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| SRETURN end_spec opt_expr
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{ exreturn($3); thiswasbranch = YES; }
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| stop end_spec opt_expr
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{ exstop($1, $3); thiswasbranch = $1; }
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;
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assignlabel: SICON
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{ $$ = mklabel( convci(toklen, token) ); }
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;
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let: SLET
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{ if(parstate == OUTSIDE)
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{
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newproc();
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startproc(ESNULL, CLMAIN);
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}
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}
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;
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goto: SGOTO end_spec label
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{ exgoto($3); thiswasbranch = YES; }
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| SASGOTO end_spec name
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{ exasgoto($3); thiswasbranch = YES; }
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| SASGOTO end_spec name opt_comma SLPAR labellist SRPAR
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{ exasgoto($3); thiswasbranch = YES; }
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| SCOMPGOTO end_spec SLPAR labellist SRPAR opt_comma expr
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{ if(nstars < MAXLABLIST)
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putcmgo(putx(fixtype($7)), nstars, labarray);
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else
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err("computed GOTO list too long");
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}
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;
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opt_comma:
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| SCOMMA
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;
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call: SCALL end_spec name
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{ nstars = 0; $$ = $3; }
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;
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callarglist: callarg
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{ $$ = $1 ? mkchain((char *)$1,CHNULL) : CHNULL; }
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| callarglist SCOMMA callarg
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{ $$ = $3 ? mkchain((char *)$3, $1) : $1; }
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;
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callarg: expr
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| SSTAR label
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{ if(nstars<MAXLABLIST) labarray[nstars++] = $2; $$ = 0; }
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;
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stop: SPAUSE
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{ $$ = 0; }
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| SSTOP
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{ $$ = 1; }
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;
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exprlist: expr
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{ $$ = mkchain((char *)$1, CHNULL); }
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| exprlist SCOMMA expr
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{ $$ = hookup($1, mkchain((char *)$3,CHNULL) ); }
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;
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end_spec:
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{ if(parstate == OUTSIDE)
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{
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newproc();
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startproc(ESNULL, CLMAIN);
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}
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/* This next statement depends on the ordering of the state table encoding */
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if(parstate < INDATA) enddcl();
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}
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;
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intonlyon:
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{ intonly = YES; }
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;
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intonlyoff:
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{ intonly = NO; }
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;
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