[perl5.git] / x2p / a2p.y

%{
/* $RCSfile: a2p.y,v $$Revision: 4.1 $$Date: 92/08/07 18:29:12 $
 *
 *    Copyright (c) 1991-1997, Larry Wall
 *
 *    You may distribute under the terms of either the GNU General Public
 *    License or the Artistic License, as specified in the README file.
 *
 * $Log:	a2p.y,v $
 */

#include "INTERN.h"
#include "a2p.h"

int root;
int begins = Nullop;
int ends = Nullop;

%}
%token BEGIN END
%token REGEX
%token SEMINEW NEWLINE COMMENT
%token FUN1 FUNN GRGR
%token PRINT PRINTF SPRINTF SPLIT
%token IF ELSE WHILE FOR IN
%token EXIT NEXT BREAK CONTINUE RET
%token GETLINE DO SUB GSUB MATCH
%token FUNCTION USERFUN DELETE

%right ASGNOP
%right '?' ':'
%left OROR
%left ANDAND
%left IN
%left NUMBER VAR SUBSTR INDEX
%left MATCHOP
%left RELOP '<' '>'
%left OR
%left STRING
%left '+' '-'
%left '*' '/' '%'
%right UMINUS
%left NOT
%right '^'
%left INCR DECR
%left FIELD VFIELD

%%

program	: junk hunks
		{ root = oper4(OPROG,$1,begins,$2,ends); }
	;

begin	: BEGIN '{' maybe states '}' junk
		{ begins = oper4(OJUNK,begins,$3,$4,$6); in_begin = FALSE;
		    $$ = Nullop; }
	;

end	: END '{' maybe states '}'
		{ ends = oper3(OJUNK,ends,$3,$4); $$ = Nullop; }
	| end NEWLINE
		{ $$ = $1; }
	;

hunks	: hunks hunk junk
		{ $$ = oper3(OHUNKS,$1,$2,$3); }
	| /* NULL */
		{ $$ = Nullop; }
	;

hunk	: patpat
		{ $$ = oper1(OHUNK,$1); need_entire = TRUE; }
	| patpat '{' maybe states '}'
		{ $$ = oper2(OHUNK,$1,oper2(OJUNK,$3,$4)); }
	| FUNCTION USERFUN '(' arg_list ')' maybe '{' maybe states '}'
		{ fixfargs($2,$4,0); $$ = oper5(OUSERDEF,$2,$4,$6,$8,$9); }
	| '{' maybe states '}'
		{ $$ = oper2(OHUNK,Nullop,oper2(OJUNK,$2,$3)); }
	| begin
	| end
	;

arg_list: expr_list
		{ $$ = rememberargs($$); }
	;

patpat	: cond
		{ $$ = oper1(OPAT,$1); }
	| cond ',' cond
		{ $$ = oper2(ORANGE,$1,$3); }
	;

cond	: expr
	| match
	| rel
	| compound_cond
	| cond '?' expr ':' expr
		{ $$ = oper3(OCOND,$1,$3,$5); }
	;

compound_cond
	: '(' compound_cond ')'
		{ $$ = oper1(OCPAREN,$2); }
	| cond ANDAND maybe cond
		{ $$ = oper3(OCANDAND,$1,$3,$4); }
	| cond OROR maybe cond
		{ $$ = oper3(OCOROR,$1,$3,$4); }
	| NOT cond
		{ $$ = oper1(OCNOT,$2); }
	;

rel	: expr RELOP expr
		{ $$ = oper3(ORELOP,$2,$1,$3); }
	| expr '>' expr
		{ $$ = oper3(ORELOP,string(">",1),$1,$3); }
	| expr '<' expr
		{ $$ = oper3(ORELOP,string("<",1),$1,$3); }
	| '(' rel ')'
		{ $$ = oper1(ORPAREN,$2); }
	;

match	: expr MATCHOP expr
		{ $$ = oper3(OMATCHOP,$2,$1,$3); }
	| expr MATCHOP REGEX
		{ $$ = oper3(OMATCHOP,$2,$1,oper1(OREGEX,$3)); }
	| REGEX		%prec MATCHOP
		{ $$ = oper1(OREGEX,$1); }
	| '(' match ')'
		{ $$ = oper1(OMPAREN,$2); }
	;

expr	: term
		{ $$ = $1; }
	| expr term
		{ $$ = oper2(OCONCAT,$1,$2); }
	| expr '?' expr ':' expr
		{ $$ = oper3(OCOND,$1,$3,$5); }
	| variable ASGNOP cond
		{ $$ = oper3(OASSIGN,$2,$1,$3);
			if ((ops[$1].ival & 255) == OFLD)
			    lval_field = TRUE;
			if ((ops[$1].ival & 255) == OVFLD)
			    lval_field = TRUE;
		}
	;

term	: variable
		{ $$ = $1; }
	| NUMBER
		{ $$ = oper1(ONUM,$1); }
	| STRING
		{ $$ = oper1(OSTR,$1); }
	| term '+' term
		{ $$ = oper2(OADD,$1,$3); }
	| term '-' term
		{ $$ = oper2(OSUBTRACT,$1,$3); }
	| term '*' term
		{ $$ = oper2(OMULT,$1,$3); }
	| term '/' term
		{ $$ = oper2(ODIV,$1,$3); }
	| term '%' term
		{ $$ = oper2(OMOD,$1,$3); }
	| term '^' term
		{ $$ = oper2(OPOW,$1,$3); }
	| term IN VAR
		{ $$ = oper2(ODEFINED,aryrefarg($3),$1); }
	| variable INCR
		{ $$ = oper1(OPOSTINCR,$1); }
	| variable DECR
		{ $$ = oper1(OPOSTDECR,$1); }
	| INCR variable
		{ $$ = oper1(OPREINCR,$2); }
	| DECR variable
		{ $$ = oper1(OPREDECR,$2); }
	| '-' term %prec UMINUS
		{ $$ = oper1(OUMINUS,$2); }
	| '+' term %prec UMINUS
		{ $$ = oper1(OUPLUS,$2); }
	| '(' cond ')'
		{ $$ = oper1(OPAREN,$2); }
	| GETLINE
		{ $$ = oper0(OGETLINE); }
	| GETLINE variable
		{ $$ = oper1(OGETLINE,$2); }
	| GETLINE '<' expr
		{ $$ = oper3(OGETLINE,Nullop,string("<",1),$3);
		    if (ops[$3].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
	| GETLINE variable '<' expr
		{ $$ = oper3(OGETLINE,$2,string("<",1),$4);
		    if (ops[$4].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
	| term 'p' GETLINE
		{ $$ = oper3(OGETLINE,Nullop,string("|",1),$1);
		    if (ops[$1].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
	| term 'p' GETLINE variable
		{ $$ = oper3(OGETLINE,$4,string("|",1),$1);
		    if (ops[$1].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
	| FUN1
		{ $$ = oper0($1); need_entire = do_chop = TRUE; }
	| FUN1 '(' ')'
		{ $$ = oper1($1,Nullop); need_entire = do_chop = TRUE; }
	| FUN1 '(' expr ')'
		{ $$ = oper1($1,$3); }
	| FUNN '(' expr_list ')'
		{ $$ = oper1($1,$3); }
	| USERFUN '(' expr_list ')'
		{ $$ = oper2(OUSERFUN,$1,$3); }
	| SPRINTF expr_list
		{ $$ = oper1(OSPRINTF,$2); }
	| SUBSTR '(' expr ',' expr ',' expr ')'
		{ $$ = oper3(OSUBSTR,$3,$5,$7); }
	| SUBSTR '(' expr ',' expr ')'
		{ $$ = oper2(OSUBSTR,$3,$5); }
	| SPLIT '(' expr ',' VAR ',' expr ')'
		{ $$ = oper3(OSPLIT,$3,aryrefarg(numary($5)),$7); }
	| SPLIT '(' expr ',' VAR ',' REGEX ')'
		{ $$ = oper3(OSPLIT,$3,aryrefarg(numary($5)),oper1(OREGEX,$7));}
	| SPLIT '(' expr ',' VAR ')'
		{ $$ = oper2(OSPLIT,$3,aryrefarg(numary($5))); }
	| INDEX '(' expr ',' expr ')'
		{ $$ = oper2(OINDEX,$3,$5); }
	| MATCH '(' expr ',' REGEX ')'
		{ $$ = oper2(OMATCH,$3,oper1(OREGEX,$5)); }
	| MATCH '(' expr ',' expr ')'
		{ $$ = oper2(OMATCH,$3,$5); }
	| SUB '(' expr ',' expr ')'
		{ $$ = oper2(OSUB,$3,$5); }
	| SUB '(' REGEX ',' expr ')'
		{ $$ = oper2(OSUB,oper1(OREGEX,$3),$5); }
	| GSUB '(' expr ',' expr ')'
		{ $$ = oper2(OGSUB,$3,$5); }
	| GSUB '(' REGEX ',' expr ')'
		{ $$ = oper2(OGSUB,oper1(OREGEX,$3),$5); }
	| SUB '(' expr ',' expr ',' expr ')'
		{ $$ = oper3(OSUB,$3,$5,$7); }
	| SUB '(' REGEX ',' expr ',' expr ')'
		{ $$ = oper3(OSUB,oper1(OREGEX,$3),$5,$7); }
	| GSUB '(' expr ',' expr ',' expr ')'
		{ $$ = oper3(OGSUB,$3,$5,$7); }
	| GSUB '(' REGEX ',' expr ',' expr ')'
		{ $$ = oper3(OGSUB,oper1(OREGEX,$3),$5,$7); }
	;

variable: VAR
		{ $$ = oper1(OVAR,$1); }
	| VAR '[' expr_list ']'
		{ $$ = oper2(OVAR,aryrefarg($1),$3); }
	| FIELD
		{ $$ = oper1(OFLD,$1); }
	| VFIELD term
		{ $$ = oper1(OVFLD,$2); }
	;

expr_list
	: expr
	| clist
	| /* NULL */
		{ $$ = Nullop; }
	;

clist	: expr ',' maybe expr
		{ $$ = oper3(OCOMMA,$1,$3,$4); }
	| clist ',' maybe expr
		{ $$ = oper3(OCOMMA,$1,$3,$4); }
	| '(' clist ')'		/* these parens are invisible */
		{ $$ = $2; }
	;

junk	: junk hunksep
		{ $$ = oper2(OJUNK,$1,$2); }
	| /* NULL */
		{ $$ = Nullop; }
	;

hunksep : ';'
		{ $$ = oper2(OJUNK,oper0(OSEMICOLON),oper0(ONEWLINE)); }
	| SEMINEW
		{ $$ = oper2(OJUNK,oper0(OSEMICOLON),oper0(ONEWLINE)); }
	| NEWLINE
		{ $$ = oper0(ONEWLINE); }
	| COMMENT
		{ $$ = oper1(OCOMMENT,$1); }
	;

maybe	: maybe nlstuff
		{ $$ = oper2(OJUNK,$1,$2); }
	| /* NULL */
		{ $$ = Nullop; }
	;

nlstuff : NEWLINE
		{ $$ = oper0(ONEWLINE); }
	| COMMENT
		{ $$ = oper1(OCOMMENT,$1); }
	;

separator
	: ';' maybe
		{ $$ = oper2(OJUNK,oper0(OSEMICOLON),$2); }
	| SEMINEW maybe
		{ $$ = oper2(OJUNK,oper0(OSNEWLINE),$2); }
	| NEWLINE maybe
		{ $$ = oper2(OJUNK,oper0(OSNEWLINE),$2); }
	| COMMENT maybe
		{ $$ = oper2(OJUNK,oper1(OSCOMMENT,$1),$2); }
	;

states	: states statement
		{ $$ = oper2(OSTATES,$1,$2); }
	| /* NULL */
		{ $$ = Nullop; }
	;

statement
	: simple separator maybe
		{ $$ = oper2(OJUNK,oper2(OSTATE,$1,$2),$3); }
	| ';' maybe
		{ $$ = oper2(OSTATE,Nullop,oper2(OJUNK,oper0(OSEMICOLON),$2)); }
	| SEMINEW maybe
		{ $$ = oper2(OSTATE,Nullop,oper2(OJUNK,oper0(OSNEWLINE),$2)); }
	| compound
	;

simpnull: simple
	| /* NULL */
		{ $$ = Nullop; }
	;

simple
	: expr
	| PRINT expr_list redir expr
		{ $$ = oper3(OPRINT,$2,$3,$4);
		    do_opens = TRUE;
		    saw_ORS = saw_OFS = TRUE;
		    if (!$2) need_entire = TRUE;
		    if (ops[$4].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
	| PRINT expr_list
		{ $$ = oper1(OPRINT,$2);
		    if (!$2) need_entire = TRUE;
		    saw_ORS = saw_OFS = TRUE;
		}
	| PRINTF expr_list redir expr
		{ $$ = oper3(OPRINTF,$2,$3,$4);
		    do_opens = TRUE;
		    if (!$2) need_entire = TRUE;
		    if (ops[$4].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
	| PRINTF expr_list
		{ $$ = oper1(OPRINTF,$2);
		    if (!$2) need_entire = TRUE;
		}
	| BREAK
		{ $$ = oper0(OBREAK); }
	| NEXT
		{ $$ = oper0(ONEXT); }
	| EXIT
		{ $$ = oper0(OEXIT); }
	| EXIT expr
		{ $$ = oper1(OEXIT,$2); }
	| CONTINUE
		{ $$ = oper0(OCONTINUE); }
	| RET
		{ $$ = oper0(ORETURN); }
	| RET expr
		{ $$ = oper1(ORETURN,$2); }
	| DELETE VAR '[' expr_list ']'
		{ $$ = oper2(ODELETE,aryrefarg($2),$4); }
	;

redir	: '>'	%prec FIELD
		{ $$ = oper1(OREDIR,string(">",1)); }
	| GRGR
		{ $$ = oper1(OREDIR,string(">>",2)); }
	| '|'
		{ $$ = oper1(OREDIR,string("|",1)); }
	;

compound
	: IF '(' cond ')' maybe statement
		{ $$ = oper2(OIF,$3,bl($6,$5)); }
	| IF '(' cond ')' maybe statement ELSE maybe statement
		{ $$ = oper3(OIF,$3,bl($6,$5),bl($9,$8)); }
	| WHILE '(' cond ')' maybe statement
		{ $$ = oper2(OWHILE,$3,bl($6,$5)); }
	| DO maybe statement WHILE '(' cond ')'
		{ $$ = oper2(ODO,bl($3,$2),$6); }
	| FOR '(' simpnull ';' cond ';' simpnull ')' maybe statement
		{ $$ = oper4(OFOR,$3,$5,$7,bl($10,$9)); }
	| FOR '(' simpnull ';'  ';' simpnull ')' maybe statement
		{ $$ = oper4(OFOR,$3,string("",0),$6,bl($9,$8)); }
	| FOR '(' expr ')' maybe statement
		{ $$ = oper2(OFORIN,$3,bl($6,$5)); }
	| '{' maybe states '}' maybe
		{ $$ = oper3(OBLOCK,oper2(OJUNK,$2,$3),Nullop,$5); }
	;

%%

int yyparse _((void));

#include "a2py.c"
Commit	Line	Data
8d063cd8	1	%{
79072805	2	/* $RCSfile: a2p.y,v $$Revision: 4.1 $$Date: 92/08/07 18:29:12 $
a687059c	3	*
9607fc9c	4	* Copyright (c) 1991-1997, Larry Wall
a687059c	5	*
2b317908 LW	6	* You may distribute under the terms of either the GNU General Public
2b317908 LW	7	* License or the Artistic License, as specified in the README file.
8d063cd8 LW	8	*
8d063cd8 LW	9	* $Log: a2p.y,v $
8d063cd8 LW	10	*/
	11
	12	#include "INTERN.h"
	13	#include "a2p.h"
	14
	15	int root;
a687059c LW	16	int begins = Nullop;
a687059c LW	17	int ends = Nullop;
8d063cd8 LW	18
	19	%}
	20	%token BEGIN END
	21	%token REGEX
	22	%token SEMINEW NEWLINE COMMENT
a687059c	23	%token FUN1 FUNN GRGR
8d063cd8 LW	24	%token PRINT PRINTF SPRINTF SPLIT
8d063cd8 LW	25	%token IF ELSE WHILE FOR IN
a687059c LW	26	%token EXIT NEXT BREAK CONTINUE RET
	27	%token GETLINE DO SUB GSUB MATCH
	28	%token FUNCTION USERFUN DELETE
8d063cd8 LW	29
8d063cd8 LW	30	%right ASGNOP
a687059c	31	%right '?' ':'
8d063cd8 LW	32	%left OROR
8d063cd8 LW	33	%left ANDAND
a687059c	34	%left IN
8d063cd8	35	%left NUMBER VAR SUBSTR INDEX
a687059c LW	36	%left MATCHOP
a687059c LW	37	%left RELOP '<' '>'
8d063cd8 LW	38	%left OR
	39	%left STRING
	40	%left '+' '-'
	41	%left '*' '/' '%'
	42	%right UMINUS
a687059c LW	43	%left NOT
a687059c LW	44	%right '^'
8d063cd8 LW	45	%left INCR DECR
	46	%left FIELD VFIELD
	47
	48	%%
	49
a687059c LW	50	program : junk hunks
a687059c LW	51	{ root = oper4(OPROG,$1,begins,$2,ends); }
8d063cd8 LW	52	;
8d063cd8 LW	53
378cc40b	54	begin : BEGIN '{' maybe states '}' junk
a687059c LW	55	{ begins = oper4(OJUNK,begins,$3,$4,$6); in_begin = FALSE;
a687059c LW	56	$$ = Nullop; }
8d063cd8 LW	57	;
8d063cd8 LW	58
378cc40b	59	end : END '{' maybe states '}'
a687059c	60	{ ends = oper3(OJUNK,ends,$3,$4); $$ = Nullop; }
8d063cd8 LW	61	\| end NEWLINE
8d063cd8 LW	62	{ $$ = $1; }
8d063cd8 LW	63	;
	64
	65	hunks : hunks hunk junk
	66	{ $$ = oper3(OHUNKS,$1,$2,$3); }
	67	\| /* NULL */
	68	{ $$ = Nullop; }
	69	;
	70
	71	hunk : patpat
	72	{ $$ = oper1(OHUNK,$1); need_entire = TRUE; }
378cc40b LW	73	\| patpat '{' maybe states '}'
378cc40b LW	74	{ $$ = oper2(OHUNK,$1,oper2(OJUNK,$3,$4)); }
a687059c LW	75	\| FUNCTION USERFUN '(' arg_list ')' maybe '{' maybe states '}'
a687059c LW	76	{ fixfargs($2,$4,0); $$ = oper5(OUSERDEF,$2,$4,$6,$8,$9); }
378cc40b LW	77	\| '{' maybe states '}'
378cc40b LW	78	{ $$ = oper2(OHUNK,Nullop,oper2(OJUNK,$2,$3)); }
a687059c LW	79	\| begin
	80	\| end
	81	;
	82
	83	arg_list: expr_list
	84	{ $$ = rememberargs($$); }
8d063cd8 LW	85	;
8d063cd8 LW	86
449aadca	87	patpat : cond
8d063cd8	88	{ $$ = oper1(OPAT,$1); }
449aadca	89	\| cond ',' cond
8d063cd8 LW	90	{ $$ = oper2(ORANGE,$1,$3); }
	91	;
	92
8d063cd8 LW	93	cond : expr
	94	\| match
	95	\| rel
	96	\| compound_cond
2304df62 AD	97	\| cond '?' expr ':' expr
2304df62 AD	98	{ $$ = oper3(OCOND,$1,$3,$5); }
8d063cd8 LW	99	;
	100
	101	compound_cond
	102	: '(' compound_cond ')'
	103	{ $$ = oper1(OCPAREN,$2); }
a687059c LW	104	\| cond ANDAND maybe cond
	105	{ $$ = oper3(OCANDAND,$1,$3,$4); }
	106	\| cond OROR maybe cond
	107	{ $$ = oper3(OCOROR,$1,$3,$4); }
8d063cd8 LW	108	\| NOT cond
	109	{ $$ = oper1(OCNOT,$2); }
	110	;
	111
	112	rel : expr RELOP expr
	113	{ $$ = oper3(ORELOP,$2,$1,$3); }
a687059c LW	114	\| expr '>' expr
	115	{ $$ = oper3(ORELOP,string(">",1),$1,$3); }
	116	\| expr '<' expr
	117	{ $$ = oper3(ORELOP,string("<",1),$1,$3); }
8d063cd8 LW	118	\| '(' rel ')'
	119	{ $$ = oper1(ORPAREN,$2); }
	120	;
	121
a687059c LW	122	match : expr MATCHOP expr
	123	{ $$ = oper3(OMATCHOP,$2,$1,$3); }
	124	\| expr MATCHOP REGEX
378cc40b	125	{ $$ = oper3(OMATCHOP,$2,$1,oper1(OREGEX,$3)); }
a687059c LW	126	\| REGEX %prec MATCHOP
a687059c LW	127	{ $$ = oper1(OREGEX,$1); }
8d063cd8 LW	128	\| '(' match ')'
	129	{ $$ = oper1(OMPAREN,$2); }
	130	;
	131
	132	expr : term
	133	{ $$ = $1; }
	134	\| expr term
	135	{ $$ = oper2(OCONCAT,$1,$2); }
c822f08a CS	136	\| expr '?' expr ':' expr
c822f08a CS	137	{ $$ = oper3(OCOND,$1,$3,$5); }
87250799	138	\| variable ASGNOP cond
8d063cd8 LW	139	{ $$ = oper3(OASSIGN,$2,$1,$3);
	140	if ((ops[$1].ival & 255) == OFLD)
	141	lval_field = TRUE;
	142	if ((ops[$1].ival & 255) == OVFLD)
	143	lval_field = TRUE;
	144	}
	145	;
	146
	147	term : variable
	148	{ $$ = $1; }
a687059c LW	149	\| NUMBER
	150	{ $$ = oper1(ONUM,$1); }
	151	\| STRING
	152	{ $$ = oper1(OSTR,$1); }
8d063cd8 LW	153	\| term '+' term
	154	{ $$ = oper2(OADD,$1,$3); }
	155	\| term '-' term
a687059c	156	{ $$ = oper2(OSUBTRACT,$1,$3); }
8d063cd8 LW	157	\| term '*' term
	158	{ $$ = oper2(OMULT,$1,$3); }
	159	\| term '/' term
	160	{ $$ = oper2(ODIV,$1,$3); }
	161	\| term '%' term
	162	{ $$ = oper2(OMOD,$1,$3); }
a687059c LW	163	\| term '^' term
	164	{ $$ = oper2(OPOW,$1,$3); }
	165	\| term IN VAR
	166	{ $$ = oper2(ODEFINED,aryrefarg($3),$1); }
8d063cd8 LW	167	\| variable INCR
	168	{ $$ = oper1(OPOSTINCR,$1); }
	169	\| variable DECR
	170	{ $$ = oper1(OPOSTDECR,$1); }
	171	\| INCR variable
	172	{ $$ = oper1(OPREINCR,$2); }
	173	\| DECR variable
	174	{ $$ = oper1(OPREDECR,$2); }
	175	\| '-' term %prec UMINUS
	176	{ $$ = oper1(OUMINUS,$2); }
	177	\| '+' term %prec UMINUS
	178	{ $$ = oper1(OUPLUS,$2); }
449aadca	179	\| '(' cond ')'
8d063cd8 LW	180	{ $$ = oper1(OPAREN,$2); }
	181	\| GETLINE
	182	{ $$ = oper0(OGETLINE); }
bf10efe7	183	\| GETLINE variable
a687059c LW	184	{ $$ = oper1(OGETLINE,$2); }
	185	\| GETLINE '<' expr
	186	{ $$ = oper3(OGETLINE,Nullop,string("<",1),$3);
	187	if (ops[$3].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
bf10efe7	188	\| GETLINE variable '<' expr
a687059c LW	189	{ $$ = oper3(OGETLINE,$2,string("<",1),$4);
	190	if (ops[$4].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
	191	\| term 'p' GETLINE
	192	{ $$ = oper3(OGETLINE,Nullop,string("\|",1),$1);
	193	if (ops[$1].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
bf10efe7	194	\| term 'p' GETLINE variable
a687059c LW	195	{ $$ = oper3(OGETLINE,$4,string("\|",1),$1);
a687059c LW	196	if (ops[$1].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
8d063cd8 LW	197	\| FUN1
	198	{ $$ = oper0($1); need_entire = do_chop = TRUE; }
	199	\| FUN1 '(' ')'
	200	{ $$ = oper1($1,Nullop); need_entire = do_chop = TRUE; }
	201	\| FUN1 '(' expr ')'
	202	{ $$ = oper1($1,$3); }
a687059c LW	203	\| FUNN '(' expr_list ')'
	204	{ $$ = oper1($1,$3); }
	205	\| USERFUN '(' expr_list ')'
	206	{ $$ = oper2(OUSERFUN,$1,$3); }
	207	\| SPRINTF expr_list
8d063cd8 LW	208	{ $$ = oper1(OSPRINTF,$2); }
	209	\| SUBSTR '(' expr ',' expr ',' expr ')'
	210	{ $$ = oper3(OSUBSTR,$3,$5,$7); }
	211	\| SUBSTR '(' expr ',' expr ')'
	212	{ $$ = oper2(OSUBSTR,$3,$5); }
	213	\| SPLIT '(' expr ',' VAR ',' expr ')'
a687059c	214	{ $$ = oper3(OSPLIT,$3,aryrefarg(numary($5)),$7); }
7e1cf235 LW	215	\| SPLIT '(' expr ',' VAR ',' REGEX ')'
7e1cf235 LW	216	{ $$ = oper3(OSPLIT,$3,aryrefarg(numary($5)),oper1(OREGEX,$7));}
8d063cd8	217	\| SPLIT '(' expr ',' VAR ')'
a687059c	218	{ $$ = oper2(OSPLIT,$3,aryrefarg(numary($5))); }
8d063cd8 LW	219	\| INDEX '(' expr ',' expr ')'
8d063cd8 LW	220	{ $$ = oper2(OINDEX,$3,$5); }
a687059c LW	221	\| MATCH '(' expr ',' REGEX ')'
	222	{ $$ = oper2(OMATCH,$3,oper1(OREGEX,$5)); }
	223	\| MATCH '(' expr ',' expr ')'
	224	{ $$ = oper2(OMATCH,$3,$5); }
	225	\| SUB '(' expr ',' expr ')'
	226	{ $$ = oper2(OSUB,$3,$5); }
	227	\| SUB '(' REGEX ',' expr ')'
	228	{ $$ = oper2(OSUB,oper1(OREGEX,$3),$5); }
	229	\| GSUB '(' expr ',' expr ')'
	230	{ $$ = oper2(OGSUB,$3,$5); }
	231	\| GSUB '(' REGEX ',' expr ')'
	232	{ $$ = oper2(OGSUB,oper1(OREGEX,$3),$5); }
	233	\| SUB '(' expr ',' expr ',' expr ')'
	234	{ $$ = oper3(OSUB,$3,$5,$7); }
	235	\| SUB '(' REGEX ',' expr ',' expr ')'
	236	{ $$ = oper3(OSUB,oper1(OREGEX,$3),$5,$7); }
	237	\| GSUB '(' expr ',' expr ',' expr ')'
	238	{ $$ = oper3(OGSUB,$3,$5,$7); }
	239	\| GSUB '(' REGEX ',' expr ',' expr ')'
	240	{ $$ = oper3(OGSUB,oper1(OREGEX,$3),$5,$7); }
8d063cd8 LW	241	;
8d063cd8 LW	242
a687059c	243	variable: VAR
8d063cd8	244	{ $$ = oper1(OVAR,$1); }
a687059c LW	245	\| VAR '[' expr_list ']'
a687059c LW	246	{ $$ = oper2(OVAR,aryrefarg($1),$3); }
8d063cd8 LW	247	\| FIELD
	248	{ $$ = oper1(OFLD,$1); }
	249	\| VFIELD term
	250	{ $$ = oper1(OVFLD,$2); }
	251	;
	252
a687059c	253	expr_list
8d063cd8 LW	254	: expr
	255	\| clist
	256	\| /* NULL */
	257	{ $$ = Nullop; }
	258	;
	259
a687059c LW	260	clist : expr ',' maybe expr
	261	{ $$ = oper3(OCOMMA,$1,$3,$4); }
	262	\| clist ',' maybe expr
	263	{ $$ = oper3(OCOMMA,$1,$3,$4); }
8d063cd8 LW	264	\| '(' clist ')' /* these parens are invisible */
	265	{ $$ = $2; }
	266	;
	267
	268	junk : junk hunksep
	269	{ $$ = oper2(OJUNK,$1,$2); }
	270	\| /* NULL */
	271	{ $$ = Nullop; }
	272	;
	273
	274	hunksep : ';'
a687059c	275	{ $$ = oper2(OJUNK,oper0(OSEMICOLON),oper0(ONEWLINE)); }
8d063cd8	276	\| SEMINEW
a687059c	277	{ $$ = oper2(OJUNK,oper0(OSEMICOLON),oper0(ONEWLINE)); }
8d063cd8 LW	278	\| NEWLINE
	279	{ $$ = oper0(ONEWLINE); }
	280	\| COMMENT
	281	{ $$ = oper1(OCOMMENT,$1); }
	282	;
	283
378cc40b LW	284	maybe : maybe nlstuff
	285	{ $$ = oper2(OJUNK,$1,$2); }
	286	\| /* NULL */
	287	{ $$ = Nullop; }
	288	;
	289
	290	nlstuff : NEWLINE
	291	{ $$ = oper0(ONEWLINE); }
8d063cd8	292	\| COMMENT
378cc40b LW	293	{ $$ = oper1(OCOMMENT,$1); }
	294	;
	295
	296	separator
	297	: ';' maybe
	298	{ $$ = oper2(OJUNK,oper0(OSEMICOLON),$2); }
	299	\| SEMINEW maybe
	300	{ $$ = oper2(OJUNK,oper0(OSNEWLINE),$2); }
	301	\| NEWLINE maybe
	302	{ $$ = oper2(OJUNK,oper0(OSNEWLINE),$2); }
	303	\| COMMENT maybe
	304	{ $$ = oper2(OJUNK,oper1(OSCOMMENT,$1),$2); }
8d063cd8 LW	305	;
	306
	307	states : states statement
	308	{ $$ = oper2(OSTATES,$1,$2); }
	309	\| /* NULL */
	310	{ $$ = Nullop; }
	311	;
	312
	313	statement
378cc40b LW	314	: simple separator maybe
	315	{ $$ = oper2(OJUNK,oper2(OSTATE,$1,$2),$3); }
	316	\| ';' maybe
	317	{ $$ = oper2(OSTATE,Nullop,oper2(OJUNK,oper0(OSEMICOLON),$2)); }
	318	\| SEMINEW maybe
	319	{ $$ = oper2(OSTATE,Nullop,oper2(OJUNK,oper0(OSNEWLINE),$2)); }
8d063cd8 LW	320	\| compound
	321	;
	322
378cc40b LW	323	simpnull: simple
	324	\| /* NULL */
	325	{ $$ = Nullop; }
	326	;
	327
8d063cd8 LW	328	simple
8d063cd8 LW	329	: expr
a687059c	330	\| PRINT expr_list redir expr
8d063cd8 LW	331	{ $$ = oper3(OPRINT,$2,$3,$4);
	332	do_opens = TRUE;
	333	saw_ORS = saw_OFS = TRUE;
	334	if (!$2) need_entire = TRUE;
	335	if (ops[$4].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
a687059c	336	\| PRINT expr_list
8d063cd8 LW	337	{ $$ = oper1(OPRINT,$2);
	338	if (!$2) need_entire = TRUE;
	339	saw_ORS = saw_OFS = TRUE;
	340	}
a687059c	341	\| PRINTF expr_list redir expr
8d063cd8 LW	342	{ $$ = oper3(OPRINTF,$2,$3,$4);
	343	do_opens = TRUE;
	344	if (!$2) need_entire = TRUE;
	345	if (ops[$4].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
a687059c	346	\| PRINTF expr_list
8d063cd8 LW	347	{ $$ = oper1(OPRINTF,$2);
	348	if (!$2) need_entire = TRUE;
	349	}
	350	\| BREAK
	351	{ $$ = oper0(OBREAK); }
	352	\| NEXT
	353	{ $$ = oper0(ONEXT); }
	354	\| EXIT
	355	{ $$ = oper0(OEXIT); }
	356	\| EXIT expr
	357	{ $$ = oper1(OEXIT,$2); }
	358	\| CONTINUE
	359	{ $$ = oper0(OCONTINUE); }
a687059c LW	360	\| RET
	361	{ $$ = oper0(ORETURN); }
	362	\| RET expr
	363	{ $$ = oper1(ORETURN,$2); }
2304df62	364	\| DELETE VAR '[' expr_list ']'
a687059c	365	{ $$ = oper2(ODELETE,aryrefarg($2),$4); }
8d063cd8 LW	366	;
8d063cd8 LW	367
a687059c	368	redir : '>' %prec FIELD
7e1cf235	369	{ $$ = oper1(OREDIR,string(">",1)); }
8d063cd8 LW	370	\| GRGR
	371	{ $$ = oper1(OREDIR,string(">>",2)); }
	372	\| '\|'
	373	{ $$ = oper1(OREDIR,string("\|",1)); }
	374	;
	375
	376	compound
	377	: IF '(' cond ')' maybe statement
	378	{ $$ = oper2(OIF,$3,bl($6,$5)); }
	379	\| IF '(' cond ')' maybe statement ELSE maybe statement
	380	{ $$ = oper3(OIF,$3,bl($6,$5),bl($9,$8)); }
	381	\| WHILE '(' cond ')' maybe statement
	382	{ $$ = oper2(OWHILE,$3,bl($6,$5)); }
a687059c LW	383	\| DO maybe statement WHILE '(' cond ')'
a687059c LW	384	{ $$ = oper2(ODO,bl($3,$2),$6); }
378cc40b	385	\| FOR '(' simpnull ';' cond ';' simpnull ')' maybe statement
8d063cd8	386	{ $$ = oper4(OFOR,$3,$5,$7,bl($10,$9)); }
378cc40b	387	\| FOR '(' simpnull ';' ';' simpnull ')' maybe statement
8d063cd8	388	{ $$ = oper4(OFOR,$3,string("",0),$6,bl($9,$8)); }
a687059c LW	389	\| FOR '(' expr ')' maybe statement
a687059c LW	390	{ $$ = oper2(OFORIN,$3,bl($6,$5)); }
378cc40b LW	391	\| '{' maybe states '}' maybe
378cc40b LW	392	{ $$ = oper3(OBLOCK,oper2(OJUNK,$2,$3),Nullop,$5); }
8d063cd8 LW	393	;
	394
	395	%%
ff0cee69	396
	397	int yyparse _((void));
	398
8d063cd8	399	#include "a2py.c"