[p5sagit/p5-mst-13.2.git] / x2p / a2p.y

%{
/* $Header: a2p.y,v 4.0 91/03/20 01:57:21 lwall Locked $
 *
 *    Copyright (c) 1989, Larry Wall
 *
 *    You may distribute under the terms of the GNU General Public License
 *    as specified in the README file that comes with the perl 3.0 kit.
 *
 * $Log:	a2p.y,v $
 * Revision 4.0  91/03/20  01:57:21  lwall
 * 4.0 baseline.
 * 
 */

#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
	;

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); }
	| 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); }
	| term '?' term ':' term
		{ $$ = oper3(OCOND,$1,$3,$5); }
	| variable INCR
		{ $$ = 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
		{ $$ = oper0(OGETLINE); }
	| GETLINE VAR
		{ $$ = oper1(OGETLINE,$2); }
	| GETLINE '<' expr
		{ $$ = oper3(OGETLINE,Nullop,string("<",1),$3);
		    if (ops[$3].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
	| GETLINE VAR '<' expr
		{ $$ = oper3(OGETLINE,$2,string("<",1),$4);
		    if (ops[$4].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
	| term 'p' GETLINE
		{ $$ = oper3(OGETLINE,Nullop,string("|",1),$1);
		    if (ops[$1].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
	| term 'p' GETLINE VAR
		{ $$ = 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
		{ $$ = oper1(ORETURN,$2); }
	| DELETE VAR '[' expr ']'
		{ $$ = 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); }
	;

%%
#include "a2py.c"
Commit	Line	Data
8d063cd8	1	%{
fe14fcc3	2	/* $Header: a2p.y,v 4.0 91/03/20 01:57:21 lwall Locked $
a687059c	3	*
	4	* Copyright (c) 1989, Larry Wall
	5	*
	6	* You may distribute under the terms of the GNU General Public License
	7	* as specified in the README file that comes with the perl 3.0 kit.
8d063cd8	8	*
8d063cd8	9	* $Log: a2p.y,v $
fe14fcc3	10	* Revision 4.0 91/03/20 01:57:21 lwall
fe14fcc3	11	* 4.0 baseline.
8d063cd8	12	*
	13	*/
	14
	15	#include "INTERN.h"
	16	#include "a2p.h"
	17
	18	int root;
a687059c	19	int begins = Nullop;
a687059c	20	int ends = Nullop;
8d063cd8	21
	22	%}
	23	%token BEGIN END
	24	%token REGEX
	25	%token SEMINEW NEWLINE COMMENT
a687059c	26	%token FUN1 FUNN GRGR
8d063cd8	27	%token PRINT PRINTF SPRINTF SPLIT
8d063cd8	28	%token IF ELSE WHILE FOR IN
a687059c	29	%token EXIT NEXT BREAK CONTINUE RET
	30	%token GETLINE DO SUB GSUB MATCH
	31	%token FUNCTION USERFUN DELETE
8d063cd8	32
8d063cd8	33	%right ASGNOP
a687059c	34	%right '?' ':'
8d063cd8	35	%left OROR
8d063cd8	36	%left ANDAND
a687059c	37	%left IN
8d063cd8	38	%left NUMBER VAR SUBSTR INDEX
a687059c	39	%left MATCHOP
a687059c	40	%left RELOP '<' '>'
8d063cd8	41	%left OR
	42	%left STRING
	43	%left '+' '-'
	44	%left '*' '/' '%'
	45	%right UMINUS
a687059c	46	%left NOT
a687059c	47	%right '^'
8d063cd8	48	%left INCR DECR
	49	%left FIELD VFIELD
	50
	51	%%
	52
a687059c	53	program : junk hunks
a687059c	54	{ root = oper4(OPROG,$1,begins,$2,ends); }
8d063cd8	55	;
8d063cd8	56
378cc40b	57	begin : BEGIN '{' maybe states '}' junk
a687059c	58	{ begins = oper4(OJUNK,begins,$3,$4,$6); in_begin = FALSE;
a687059c	59	$$ = Nullop; }
8d063cd8	60	;
8d063cd8	61
378cc40b	62	end : END '{' maybe states '}'
a687059c	63	{ ends = oper3(OJUNK,ends,$3,$4); $$ = Nullop; }
8d063cd8	64	\| end NEWLINE
8d063cd8	65	{ $$ = $1; }
8d063cd8	66	;
	67
	68	hunks : hunks hunk junk
	69	{ $$ = oper3(OHUNKS,$1,$2,$3); }
	70	\| /* NULL */
	71	{ $$ = Nullop; }
	72	;
	73
	74	hunk : patpat
	75	{ $$ = oper1(OHUNK,$1); need_entire = TRUE; }
378cc40b	76	\| patpat '{' maybe states '}'
378cc40b	77	{ $$ = oper2(OHUNK,$1,oper2(OJUNK,$3,$4)); }
a687059c	78	\| FUNCTION USERFUN '(' arg_list ')' maybe '{' maybe states '}'
a687059c	79	{ fixfargs($2,$4,0); $$ = oper5(OUSERDEF,$2,$4,$6,$8,$9); }
378cc40b	80	\| '{' maybe states '}'
378cc40b	81	{ $$ = oper2(OHUNK,Nullop,oper2(OJUNK,$2,$3)); }
a687059c	82	\| begin
	83	\| end
	84	;
	85
	86	arg_list: expr_list
	87	{ $$ = rememberargs($$); }
8d063cd8	88	;
8d063cd8	89
449aadca	90	patpat : cond
8d063cd8	91	{ $$ = oper1(OPAT,$1); }
449aadca	92	\| cond ',' cond
8d063cd8	93	{ $$ = oper2(ORANGE,$1,$3); }
	94	;
	95
8d063cd8	96	cond : expr
	97	\| match
	98	\| rel
	99	\| compound_cond
	100	;
	101
	102	compound_cond
	103	: '(' compound_cond ')'
	104	{ $$ = oper1(OCPAREN,$2); }
a687059c	105	\| cond ANDAND maybe cond
	106	{ $$ = oper3(OCANDAND,$1,$3,$4); }
	107	\| cond OROR maybe cond
	108	{ $$ = oper3(OCOROR,$1,$3,$4); }
8d063cd8	109	\| NOT cond
	110	{ $$ = oper1(OCNOT,$2); }
	111	;
	112
	113	rel : expr RELOP expr
	114	{ $$ = oper3(ORELOP,$2,$1,$3); }
a687059c	115	\| expr '>' expr
	116	{ $$ = oper3(ORELOP,string(">",1),$1,$3); }
	117	\| expr '<' expr
	118	{ $$ = oper3(ORELOP,string("<",1),$1,$3); }
8d063cd8	119	\| '(' rel ')'
	120	{ $$ = oper1(ORPAREN,$2); }
	121	;
	122
a687059c	123	match : expr MATCHOP expr
	124	{ $$ = oper3(OMATCHOP,$2,$1,$3); }
	125	\| expr MATCHOP REGEX
378cc40b	126	{ $$ = oper3(OMATCHOP,$2,$1,oper1(OREGEX,$3)); }
a687059c	127	\| REGEX %prec MATCHOP
a687059c	128	{ $$ = oper1(OREGEX,$1); }
8d063cd8	129	\| '(' match ')'
	130	{ $$ = oper1(OMPAREN,$2); }
	131	;
	132
	133	expr : term
	134	{ $$ = $1; }
	135	\| expr term
	136	{ $$ = oper2(OCONCAT,$1,$2); }
87250799	137	\| variable ASGNOP cond
8d063cd8	138	{ $$ = oper3(OASSIGN,$2,$1,$3);
	139	if ((ops[$1].ival & 255) == OFLD)
	140	lval_field = TRUE;
	141	if ((ops[$1].ival & 255) == OVFLD)
	142	lval_field = TRUE;
	143	}
	144	;
	145
	146	term : variable
	147	{ $$ = $1; }
a687059c	148	\| NUMBER
	149	{ $$ = oper1(ONUM,$1); }
	150	\| STRING
	151	{ $$ = oper1(OSTR,$1); }
8d063cd8	152	\| term '+' term
	153	{ $$ = oper2(OADD,$1,$3); }
	154	\| term '-' term
a687059c	155	{ $$ = oper2(OSUBTRACT,$1,$3); }
8d063cd8	156	\| term '*' term
	157	{ $$ = oper2(OMULT,$1,$3); }
	158	\| term '/' term
	159	{ $$ = oper2(ODIV,$1,$3); }
	160	\| term '%' term
	161	{ $$ = oper2(OMOD,$1,$3); }
a687059c	162	\| term '^' term
	163	{ $$ = oper2(OPOW,$1,$3); }
	164	\| term IN VAR
	165	{ $$ = oper2(ODEFINED,aryrefarg($3),$1); }
	166	\| term '?' term ':' term
87250799	167	{ $$ = oper3(OCOND,$1,$3,$5); }
8d063cd8	168	\| variable INCR
	169	{ $$ = oper1(OPOSTINCR,$1); }
	170	\| variable DECR
	171	{ $$ = oper1(OPOSTDECR,$1); }
	172	\| INCR variable
	173	{ $$ = oper1(OPREINCR,$2); }
	174	\| DECR variable
	175	{ $$ = oper1(OPREDECR,$2); }
	176	\| '-' term %prec UMINUS
	177	{ $$ = oper1(OUMINUS,$2); }
	178	\| '+' term %prec UMINUS
	179	{ $$ = oper1(OUPLUS,$2); }
449aadca	180	\| '(' cond ')'
8d063cd8	181	{ $$ = oper1(OPAREN,$2); }
	182	\| GETLINE
	183	{ $$ = oper0(OGETLINE); }
a687059c	184	\| GETLINE VAR
	185	{ $$ = oper1(OGETLINE,$2); }
	186	\| GETLINE '<' expr
	187	{ $$ = oper3(OGETLINE,Nullop,string("<",1),$3);
	188	if (ops[$3].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
	189	\| GETLINE VAR '<' expr
	190	{ $$ = oper3(OGETLINE,$2,string("<",1),$4);
	191	if (ops[$4].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
	192	\| term 'p' GETLINE
	193	{ $$ = oper3(OGETLINE,Nullop,string("\|",1),$1);
	194	if (ops[$1].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
	195	\| term 'p' GETLINE VAR
	196	{ $$ = oper3(OGETLINE,$4,string("\|",1),$1);
	197	if (ops[$1].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
8d063cd8	198	\| FUN1
	199	{ $$ = oper0($1); need_entire = do_chop = TRUE; }
	200	\| FUN1 '(' ')'
	201	{ $$ = oper1($1,Nullop); need_entire = do_chop = TRUE; }
	202	\| FUN1 '(' expr ')'
	203	{ $$ = oper1($1,$3); }
a687059c	204	\| FUNN '(' expr_list ')'
	205	{ $$ = oper1($1,$3); }
	206	\| USERFUN '(' expr_list ')'
	207	{ $$ = oper2(OUSERFUN,$1,$3); }
	208	\| SPRINTF expr_list
8d063cd8	209	{ $$ = oper1(OSPRINTF,$2); }
	210	\| SUBSTR '(' expr ',' expr ',' expr ')'
	211	{ $$ = oper3(OSUBSTR,$3,$5,$7); }
	212	\| SUBSTR '(' expr ',' expr ')'
	213	{ $$ = oper2(OSUBSTR,$3,$5); }
	214	\| SPLIT '(' expr ',' VAR ',' expr ')'
a687059c	215	{ $$ = oper3(OSPLIT,$3,aryrefarg(numary($5)),$7); }
7e1cf235	216	\| SPLIT '(' expr ',' VAR ',' REGEX ')'
7e1cf235	217	{ $$ = oper3(OSPLIT,$3,aryrefarg(numary($5)),oper1(OREGEX,$7));}
8d063cd8	218	\| SPLIT '(' expr ',' VAR ')'
a687059c	219	{ $$ = oper2(OSPLIT,$3,aryrefarg(numary($5))); }
8d063cd8	220	\| INDEX '(' expr ',' expr ')'
8d063cd8	221	{ $$ = oper2(OINDEX,$3,$5); }
a687059c	222	\| MATCH '(' expr ',' REGEX ')'
	223	{ $$ = oper2(OMATCH,$3,oper1(OREGEX,$5)); }
	224	\| MATCH '(' expr ',' expr ')'
	225	{ $$ = oper2(OMATCH,$3,$5); }
	226	\| SUB '(' expr ',' expr ')'
	227	{ $$ = oper2(OSUB,$3,$5); }
	228	\| SUB '(' REGEX ',' expr ')'
	229	{ $$ = oper2(OSUB,oper1(OREGEX,$3),$5); }
	230	\| GSUB '(' expr ',' expr ')'
	231	{ $$ = oper2(OGSUB,$3,$5); }
	232	\| GSUB '(' REGEX ',' expr ')'
	233	{ $$ = oper2(OGSUB,oper1(OREGEX,$3),$5); }
	234	\| SUB '(' expr ',' expr ',' expr ')'
	235	{ $$ = oper3(OSUB,$3,$5,$7); }
	236	\| SUB '(' REGEX ',' expr ',' expr ')'
	237	{ $$ = oper3(OSUB,oper1(OREGEX,$3),$5,$7); }
	238	\| GSUB '(' expr ',' expr ',' expr ')'
	239	{ $$ = oper3(OGSUB,$3,$5,$7); }
	240	\| GSUB '(' REGEX ',' expr ',' expr ')'
	241	{ $$ = oper3(OGSUB,oper1(OREGEX,$3),$5,$7); }
8d063cd8	242	;
8d063cd8	243
a687059c	244	variable: VAR
8d063cd8	245	{ $$ = oper1(OVAR,$1); }
a687059c	246	\| VAR '[' expr_list ']'
a687059c	247	{ $$ = oper2(OVAR,aryrefarg($1),$3); }
8d063cd8	248	\| FIELD
	249	{ $$ = oper1(OFLD,$1); }
	250	\| VFIELD term
	251	{ $$ = oper1(OVFLD,$2); }
	252	;
	253
a687059c	254	expr_list
8d063cd8	255	: expr
	256	\| clist
	257	\| /* NULL */
	258	{ $$ = Nullop; }
	259	;
	260
a687059c	261	clist : expr ',' maybe expr
	262	{ $$ = oper3(OCOMMA,$1,$3,$4); }
	263	\| clist ',' maybe expr
	264	{ $$ = oper3(OCOMMA,$1,$3,$4); }
8d063cd8	265	\| '(' clist ')' /* these parens are invisible */
	266	{ $$ = $2; }
	267	;
	268
	269	junk : junk hunksep
	270	{ $$ = oper2(OJUNK,$1,$2); }
	271	\| /* NULL */
	272	{ $$ = Nullop; }
	273	;
	274
	275	hunksep : ';'
a687059c	276	{ $$ = oper2(OJUNK,oper0(OSEMICOLON),oper0(ONEWLINE)); }
8d063cd8	277	\| SEMINEW
a687059c	278	{ $$ = oper2(OJUNK,oper0(OSEMICOLON),oper0(ONEWLINE)); }
8d063cd8	279	\| NEWLINE
	280	{ $$ = oper0(ONEWLINE); }
	281	\| COMMENT
	282	{ $$ = oper1(OCOMMENT,$1); }
	283	;
	284
378cc40b	285	maybe : maybe nlstuff
	286	{ $$ = oper2(OJUNK,$1,$2); }
	287	\| /* NULL */
	288	{ $$ = Nullop; }
	289	;
	290
	291	nlstuff : NEWLINE
	292	{ $$ = oper0(ONEWLINE); }
8d063cd8	293	\| COMMENT
378cc40b	294	{ $$ = oper1(OCOMMENT,$1); }
	295	;
	296
	297	separator
	298	: ';' maybe
	299	{ $$ = oper2(OJUNK,oper0(OSEMICOLON),$2); }
	300	\| SEMINEW maybe
	301	{ $$ = oper2(OJUNK,oper0(OSNEWLINE),$2); }
	302	\| NEWLINE maybe
	303	{ $$ = oper2(OJUNK,oper0(OSNEWLINE),$2); }
	304	\| COMMENT maybe
	305	{ $$ = oper2(OJUNK,oper1(OSCOMMENT,$1),$2); }
8d063cd8	306	;
	307
	308	states : states statement
	309	{ $$ = oper2(OSTATES,$1,$2); }
	310	\| /* NULL */
	311	{ $$ = Nullop; }
	312	;
	313
	314	statement
378cc40b	315	: simple separator maybe
	316	{ $$ = oper2(OJUNK,oper2(OSTATE,$1,$2),$3); }
	317	\| ';' maybe
	318	{ $$ = oper2(OSTATE,Nullop,oper2(OJUNK,oper0(OSEMICOLON),$2)); }
	319	\| SEMINEW maybe
	320	{ $$ = oper2(OSTATE,Nullop,oper2(OJUNK,oper0(OSNEWLINE),$2)); }
8d063cd8	321	\| compound
	322	;
	323
378cc40b	324	simpnull: simple
	325	\| /* NULL */
	326	{ $$ = Nullop; }
	327	;
	328
8d063cd8	329	simple
8d063cd8	330	: expr
a687059c	331	\| PRINT expr_list redir expr
8d063cd8	332	{ $$ = oper3(OPRINT,$2,$3,$4);
	333	do_opens = TRUE;
	334	saw_ORS = saw_OFS = TRUE;
	335	if (!$2) need_entire = TRUE;
	336	if (ops[$4].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
a687059c	337	\| PRINT expr_list
8d063cd8	338	{ $$ = oper1(OPRINT,$2);
	339	if (!$2) need_entire = TRUE;
	340	saw_ORS = saw_OFS = TRUE;
	341	}
a687059c	342	\| PRINTF expr_list redir expr
8d063cd8	343	{ $$ = oper3(OPRINTF,$2,$3,$4);
	344	do_opens = TRUE;
	345	if (!$2) need_entire = TRUE;
	346	if (ops[$4].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
a687059c	347	\| PRINTF expr_list
8d063cd8	348	{ $$ = oper1(OPRINTF,$2);
	349	if (!$2) need_entire = TRUE;
	350	}
	351	\| BREAK
	352	{ $$ = oper0(OBREAK); }
	353	\| NEXT
	354	{ $$ = oper0(ONEXT); }
	355	\| EXIT
	356	{ $$ = oper0(OEXIT); }
	357	\| EXIT expr
	358	{ $$ = oper1(OEXIT,$2); }
	359	\| CONTINUE
	360	{ $$ = oper0(OCONTINUE); }
a687059c	361	\| RET
	362	{ $$ = oper0(ORETURN); }
	363	\| RET expr
	364	{ $$ = oper1(ORETURN,$2); }
	365	\| DELETE VAR '[' expr ']'
	366	{ $$ = oper2(ODELETE,aryrefarg($2),$4); }
8d063cd8	367	;
8d063cd8	368
a687059c	369	redir : '>' %prec FIELD
7e1cf235	370	{ $$ = oper1(OREDIR,string(">",1)); }
8d063cd8	371	\| GRGR
	372	{ $$ = oper1(OREDIR,string(">>",2)); }
	373	\| '\|'
	374	{ $$ = oper1(OREDIR,string("\|",1)); }
	375	;
	376
	377	compound
	378	: IF '(' cond ')' maybe statement
	379	{ $$ = oper2(OIF,$3,bl($6,$5)); }
	380	\| IF '(' cond ')' maybe statement ELSE maybe statement
	381	{ $$ = oper3(OIF,$3,bl($6,$5),bl($9,$8)); }
	382	\| WHILE '(' cond ')' maybe statement
	383	{ $$ = oper2(OWHILE,$3,bl($6,$5)); }
a687059c	384	\| DO maybe statement WHILE '(' cond ')'
a687059c	385	{ $$ = oper2(ODO,bl($3,$2),$6); }
378cc40b	386	\| FOR '(' simpnull ';' cond ';' simpnull ')' maybe statement
8d063cd8	387	{ $$ = oper4(OFOR,$3,$5,$7,bl($10,$9)); }
378cc40b	388	\| FOR '(' simpnull ';' ';' simpnull ')' maybe statement
8d063cd8	389	{ $$ = oper4(OFOR,$3,string("",0),$6,bl($9,$8)); }
a687059c	390	\| FOR '(' expr ')' maybe statement
a687059c	391	{ $$ = oper2(OFORIN,$3,bl($6,$5)); }
378cc40b	392	\| '{' maybe states '}' maybe
378cc40b	393	{ $$ = oper3(OBLOCK,oper2(OJUNK,$2,$3),Nullop,$5); }
8d063cd8	394	;
	395
	396	%%
	397	#include "a2py.c"