[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_OLD SPRINTF_NEW 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;
		}
	;

sprintf	: SPRINTF_NEW
	| SPRINTF_OLD ;

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_NEW '(' expr_list ')'
		{ $$ = oper1(OSPRINTF,$3); }
	| sprintf expr_list
		{ $$ = 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
2efaeb47	24	%token PRINT PRINTF SPRINTF_OLD SPRINTF_NEW SPLIT
8d063cd8	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
2efaeb47 AD	147	sprintf : SPRINTF_NEW
	148	\| SPRINTF_OLD ;
	149
8d063cd8 LW	150	term : variable
8d063cd8 LW	151	{ $$ = $1; }
a687059c LW	152	\| NUMBER
	153	{ $$ = oper1(ONUM,$1); }
	154	\| STRING
	155	{ $$ = oper1(OSTR,$1); }
8d063cd8 LW	156	\| term '+' term
	157	{ $$ = oper2(OADD,$1,$3); }
	158	\| term '-' term
a687059c	159	{ $$ = oper2(OSUBTRACT,$1,$3); }
8d063cd8 LW	160	\| term '*' term
	161	{ $$ = oper2(OMULT,$1,$3); }
	162	\| term '/' term
	163	{ $$ = oper2(ODIV,$1,$3); }
	164	\| term '%' term
	165	{ $$ = oper2(OMOD,$1,$3); }
a687059c LW	166	\| term '^' term
	167	{ $$ = oper2(OPOW,$1,$3); }
	168	\| term IN VAR
	169	{ $$ = oper2(ODEFINED,aryrefarg($3),$1); }
8d063cd8 LW	170	\| variable INCR
	171	{ $$ = oper1(OPOSTINCR,$1); }
	172	\| variable DECR
	173	{ $$ = oper1(OPOSTDECR,$1); }
	174	\| INCR variable
	175	{ $$ = oper1(OPREINCR,$2); }
	176	\| DECR variable
	177	{ $$ = oper1(OPREDECR,$2); }
	178	\| '-' term %prec UMINUS
	179	{ $$ = oper1(OUMINUS,$2); }
	180	\| '+' term %prec UMINUS
	181	{ $$ = oper1(OUPLUS,$2); }
449aadca	182	\| '(' cond ')'
8d063cd8 LW	183	{ $$ = oper1(OPAREN,$2); }
	184	\| GETLINE
	185	{ $$ = oper0(OGETLINE); }
bf10efe7	186	\| GETLINE variable
a687059c LW	187	{ $$ = oper1(OGETLINE,$2); }
	188	\| GETLINE '<' expr
	189	{ $$ = oper3(OGETLINE,Nullop,string("<",1),$3);
	190	if (ops[$3].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
bf10efe7	191	\| GETLINE variable '<' expr
a687059c LW	192	{ $$ = oper3(OGETLINE,$2,string("<",1),$4);
	193	if (ops[$4].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
	194	\| term 'p' GETLINE
	195	{ $$ = oper3(OGETLINE,Nullop,string("\|",1),$1);
	196	if (ops[$1].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
bf10efe7	197	\| term 'p' GETLINE variable
a687059c LW	198	{ $$ = oper3(OGETLINE,$4,string("\|",1),$1);
a687059c LW	199	if (ops[$1].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
8d063cd8 LW	200	\| FUN1
	201	{ $$ = oper0($1); need_entire = do_chop = TRUE; }
	202	\| FUN1 '(' ')'
	203	{ $$ = oper1($1,Nullop); need_entire = do_chop = TRUE; }
	204	\| FUN1 '(' expr ')'
	205	{ $$ = oper1($1,$3); }
a687059c LW	206	\| FUNN '(' expr_list ')'
	207	{ $$ = oper1($1,$3); }
	208	\| USERFUN '(' expr_list ')'
	209	{ $$ = oper2(OUSERFUN,$1,$3); }
2efaeb47 AD	210	\| SPRINTF_NEW '(' expr_list ')'
	211	{ $$ = oper1(OSPRINTF,$3); }
	212	\| sprintf expr_list
8d063cd8 LW	213	{ $$ = oper1(OSPRINTF,$2); }
	214	\| SUBSTR '(' expr ',' expr ',' expr ')'
	215	{ $$ = oper3(OSUBSTR,$3,$5,$7); }
	216	\| SUBSTR '(' expr ',' expr ')'
	217	{ $$ = oper2(OSUBSTR,$3,$5); }
	218	\| SPLIT '(' expr ',' VAR ',' expr ')'
a687059c	219	{ $$ = oper3(OSPLIT,$3,aryrefarg(numary($5)),$7); }
7e1cf235 LW	220	\| SPLIT '(' expr ',' VAR ',' REGEX ')'
7e1cf235 LW	221	{ $$ = oper3(OSPLIT,$3,aryrefarg(numary($5)),oper1(OREGEX,$7));}
8d063cd8	222	\| SPLIT '(' expr ',' VAR ')'
a687059c	223	{ $$ = oper2(OSPLIT,$3,aryrefarg(numary($5))); }
8d063cd8 LW	224	\| INDEX '(' expr ',' expr ')'
8d063cd8 LW	225	{ $$ = oper2(OINDEX,$3,$5); }
a687059c LW	226	\| MATCH '(' expr ',' REGEX ')'
	227	{ $$ = oper2(OMATCH,$3,oper1(OREGEX,$5)); }
	228	\| MATCH '(' expr ',' expr ')'
	229	{ $$ = oper2(OMATCH,$3,$5); }
	230	\| SUB '(' expr ',' expr ')'
	231	{ $$ = oper2(OSUB,$3,$5); }
	232	\| SUB '(' REGEX ',' expr ')'
	233	{ $$ = oper2(OSUB,oper1(OREGEX,$3),$5); }
	234	\| GSUB '(' expr ',' expr ')'
	235	{ $$ = oper2(OGSUB,$3,$5); }
	236	\| GSUB '(' REGEX ',' expr ')'
	237	{ $$ = oper2(OGSUB,oper1(OREGEX,$3),$5); }
	238	\| SUB '(' expr ',' expr ',' expr ')'
	239	{ $$ = oper3(OSUB,$3,$5,$7); }
	240	\| SUB '(' REGEX ',' expr ',' expr ')'
	241	{ $$ = oper3(OSUB,oper1(OREGEX,$3),$5,$7); }
	242	\| GSUB '(' expr ',' expr ',' expr ')'
	243	{ $$ = oper3(OGSUB,$3,$5,$7); }
	244	\| GSUB '(' REGEX ',' expr ',' expr ')'
	245	{ $$ = oper3(OGSUB,oper1(OREGEX,$3),$5,$7); }
8d063cd8 LW	246	;
8d063cd8 LW	247
a687059c	248	variable: VAR
8d063cd8	249	{ $$ = oper1(OVAR,$1); }
a687059c LW	250	\| VAR '[' expr_list ']'
a687059c LW	251	{ $$ = oper2(OVAR,aryrefarg($1),$3); }
8d063cd8 LW	252	\| FIELD
	253	{ $$ = oper1(OFLD,$1); }
	254	\| VFIELD term
	255	{ $$ = oper1(OVFLD,$2); }
	256	;
	257
a687059c	258	expr_list
8d063cd8 LW	259	: expr
	260	\| clist
	261	\| /* NULL */
	262	{ $$ = Nullop; }
	263	;
	264
a687059c LW	265	clist : expr ',' maybe expr
	266	{ $$ = oper3(OCOMMA,$1,$3,$4); }
	267	\| clist ',' maybe expr
	268	{ $$ = oper3(OCOMMA,$1,$3,$4); }
8d063cd8 LW	269	\| '(' clist ')' /* these parens are invisible */
	270	{ $$ = $2; }
	271	;
	272
	273	junk : junk hunksep
	274	{ $$ = oper2(OJUNK,$1,$2); }
	275	\| /* NULL */
	276	{ $$ = Nullop; }
	277	;
	278
	279	hunksep : ';'
a687059c	280	{ $$ = oper2(OJUNK,oper0(OSEMICOLON),oper0(ONEWLINE)); }
8d063cd8	281	\| SEMINEW
a687059c	282	{ $$ = oper2(OJUNK,oper0(OSEMICOLON),oper0(ONEWLINE)); }
8d063cd8 LW	283	\| NEWLINE
	284	{ $$ = oper0(ONEWLINE); }
	285	\| COMMENT
	286	{ $$ = oper1(OCOMMENT,$1); }
	287	;
	288
378cc40b LW	289	maybe : maybe nlstuff
	290	{ $$ = oper2(OJUNK,$1,$2); }
	291	\| /* NULL */
	292	{ $$ = Nullop; }
	293	;
	294
	295	nlstuff : NEWLINE
	296	{ $$ = oper0(ONEWLINE); }
8d063cd8	297	\| COMMENT
378cc40b LW	298	{ $$ = oper1(OCOMMENT,$1); }
	299	;
	300
	301	separator
	302	: ';' maybe
	303	{ $$ = oper2(OJUNK,oper0(OSEMICOLON),$2); }
	304	\| SEMINEW maybe
	305	{ $$ = oper2(OJUNK,oper0(OSNEWLINE),$2); }
	306	\| NEWLINE maybe
	307	{ $$ = oper2(OJUNK,oper0(OSNEWLINE),$2); }
	308	\| COMMENT maybe
	309	{ $$ = oper2(OJUNK,oper1(OSCOMMENT,$1),$2); }
8d063cd8 LW	310	;
	311
	312	states : states statement
	313	{ $$ = oper2(OSTATES,$1,$2); }
	314	\| /* NULL */
	315	{ $$ = Nullop; }
	316	;
	317
	318	statement
378cc40b LW	319	: simple separator maybe
	320	{ $$ = oper2(OJUNK,oper2(OSTATE,$1,$2),$3); }
	321	\| ';' maybe
	322	{ $$ = oper2(OSTATE,Nullop,oper2(OJUNK,oper0(OSEMICOLON),$2)); }
	323	\| SEMINEW maybe
	324	{ $$ = oper2(OSTATE,Nullop,oper2(OJUNK,oper0(OSNEWLINE),$2)); }
8d063cd8 LW	325	\| compound
	326	;
	327
378cc40b LW	328	simpnull: simple
	329	\| /* NULL */
	330	{ $$ = Nullop; }
	331	;
	332
8d063cd8 LW	333	simple
8d063cd8 LW	334	: expr
a687059c	335	\| PRINT expr_list redir expr
8d063cd8 LW	336	{ $$ = oper3(OPRINT,$2,$3,$4);
	337	do_opens = TRUE;
	338	saw_ORS = saw_OFS = TRUE;
	339	if (!$2) need_entire = TRUE;
	340	if (ops[$4].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
a687059c	341	\| PRINT expr_list
8d063cd8 LW	342	{ $$ = oper1(OPRINT,$2);
	343	if (!$2) need_entire = TRUE;
	344	saw_ORS = saw_OFS = TRUE;
	345	}
a687059c	346	\| PRINTF expr_list redir expr
8d063cd8 LW	347	{ $$ = oper3(OPRINTF,$2,$3,$4);
	348	do_opens = TRUE;
	349	if (!$2) need_entire = TRUE;
	350	if (ops[$4].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
a687059c	351	\| PRINTF expr_list
8d063cd8 LW	352	{ $$ = oper1(OPRINTF,$2);
	353	if (!$2) need_entire = TRUE;
	354	}
	355	\| BREAK
	356	{ $$ = oper0(OBREAK); }
	357	\| NEXT
	358	{ $$ = oper0(ONEXT); }
	359	\| EXIT
	360	{ $$ = oper0(OEXIT); }
	361	\| EXIT expr
	362	{ $$ = oper1(OEXIT,$2); }
	363	\| CONTINUE
	364	{ $$ = oper0(OCONTINUE); }
a687059c LW	365	\| RET
	366	{ $$ = oper0(ORETURN); }
	367	\| RET expr
	368	{ $$ = oper1(ORETURN,$2); }
2304df62	369	\| DELETE VAR '[' expr_list ']'
a687059c	370	{ $$ = oper2(ODELETE,aryrefarg($2),$4); }
8d063cd8 LW	371	;
8d063cd8 LW	372
a687059c	373	redir : '>' %prec FIELD
7e1cf235	374	{ $$ = oper1(OREDIR,string(">",1)); }
8d063cd8 LW	375	\| GRGR
	376	{ $$ = oper1(OREDIR,string(">>",2)); }
	377	\| '\|'
	378	{ $$ = oper1(OREDIR,string("\|",1)); }
	379	;
	380
	381	compound
	382	: IF '(' cond ')' maybe statement
	383	{ $$ = oper2(OIF,$3,bl($6,$5)); }
	384	\| IF '(' cond ')' maybe statement ELSE maybe statement
	385	{ $$ = oper3(OIF,$3,bl($6,$5),bl($9,$8)); }
	386	\| WHILE '(' cond ')' maybe statement
	387	{ $$ = oper2(OWHILE,$3,bl($6,$5)); }
a687059c LW	388	\| DO maybe statement WHILE '(' cond ')'
a687059c LW	389	{ $$ = oper2(ODO,bl($3,$2),$6); }
378cc40b	390	\| FOR '(' simpnull ';' cond ';' simpnull ')' maybe statement
8d063cd8	391	{ $$ = oper4(OFOR,$3,$5,$7,bl($10,$9)); }
378cc40b	392	\| FOR '(' simpnull ';' ';' simpnull ')' maybe statement
8d063cd8	393	{ $$ = oper4(OFOR,$3,string("",0),$6,bl($9,$8)); }
a687059c LW	394	\| FOR '(' expr ')' maybe statement
a687059c LW	395	{ $$ = oper2(OFORIN,$3,bl($6,$5)); }
378cc40b LW	396	\| '{' maybe states '}' maybe
378cc40b LW	397	{ $$ = oper3(OBLOCK,oper2(OJUNK,$2,$3),Nullop,$5); }
8d063cd8 LW	398	;
	399
	400	%%
ff0cee69	401
20ce7b12	402	int yyparse (void);
ff0cee69	403
8d063cd8	404	#include "a2py.c"