[perl5.git] / x2p / a2p.y

%{
/* $RCSfile: a2p.y,v $$Revision: 4.1 $$Date: 92/08/07 18:29:12 $
 *
 *    Copyright (C) 1991, 1992, 1993, 1994, 1996, 1997, 1999, 2000,
 *    by Larry Wall and others
 *
 *    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 SVFIELD

%%

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;
		    else 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
		{
		    $$ = oper1(OPOSTINCR,$1);
		    if ((ops[$1].ival & 255) == OFLD)
			lval_field = TRUE;
		    else if ((ops[$1].ival & 255) == OVFLD)
			lval_field = TRUE;
		}
	| variable DECR
		{
		    $$ = oper1(OPOSTDECR,$1);
		    if ((ops[$1].ival & 255) == OFLD)
			lval_field = TRUE;
		    else if ((ops[$1].ival & 255) == OVFLD)
			lval_field = TRUE;
		}
	| INCR variable
		{
		    $$ = oper1(OPREINCR,$2);
		    if ((ops[$2].ival & 255) == OFLD)
			lval_field = TRUE;
		    else if ((ops[$2].ival & 255) == OVFLD)
			lval_field = TRUE;
		}
	| DECR variable
		{
		    $$ = oper1(OPREDECR,$2);
		    if ((ops[$2].ival & 255) == OFLD)
			lval_field = TRUE;
		    else if ((ops[$2].ival & 255) == OVFLD)
			lval_field = TRUE;
		}
	| '-' 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
		{ $$ = oper1(OFLD,$1); }
	| SVFIELD
		{ $$ = oper1(OVFLD,oper1(OVAR,$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	*
4bb101f2 JH	4	* Copyright (C) 1991, 1992, 1993, 1994, 1996, 1997, 1999, 2000,
4bb101f2 JH	5	* by Larry Wall and others
a687059c	6	*
2b317908 LW	7	* You may distribute under the terms of either the GNU General Public
2b317908 LW	8	* License or the Artistic License, as specified in the README file.
8d063cd8 LW	9	*
8d063cd8 LW	10	* $Log: a2p.y,v $
8d063cd8 LW	11	*/
	12
	13	#include "INTERN.h"
	14	#include "a2p.h"
	15
	16	int root;
a687059c LW	17	int begins = Nullop;
a687059c LW	18	int ends = Nullop;
8d063cd8 LW	19
	20	%}
	21	%token BEGIN END
	22	%token REGEX
	23	%token SEMINEW NEWLINE COMMENT
a687059c	24	%token FUN1 FUNN GRGR
2efaeb47	25	%token PRINT PRINTF SPRINTF_OLD SPRINTF_NEW SPLIT
8d063cd8	26	%token IF ELSE WHILE FOR IN
a687059c LW	27	%token EXIT NEXT BREAK CONTINUE RET
	28	%token GETLINE DO SUB GSUB MATCH
	29	%token FUNCTION USERFUN DELETE
8d063cd8 LW	30
8d063cd8 LW	31	%right ASGNOP
a687059c	32	%right '?' ':'
8d063cd8 LW	33	%left OROR
8d063cd8 LW	34	%left ANDAND
a687059c	35	%left IN
8d063cd8	36	%left NUMBER VAR SUBSTR INDEX
a687059c LW	37	%left MATCHOP
a687059c LW	38	%left RELOP '<' '>'
8d063cd8 LW	39	%left OR
	40	%left STRING
	41	%left '+' '-'
	42	%left '*' '/' '%'
	43	%right UMINUS
a687059c LW	44	%left NOT
a687059c LW	45	%right '^'
8d063cd8	46	%left INCR DECR
4cec2b33	47	%left FIELD VFIELD SVFIELD
8d063cd8 LW	48
	49	%%
	50
a687059c LW	51	program : junk hunks
a687059c LW	52	{ root = oper4(OPROG,$1,begins,$2,ends); }
8d063cd8 LW	53	;
8d063cd8 LW	54
378cc40b	55	begin : BEGIN '{' maybe states '}' junk
a687059c LW	56	{ begins = oper4(OJUNK,begins,$3,$4,$6); in_begin = FALSE;
a687059c LW	57	$$ = Nullop; }
8d063cd8 LW	58	;
8d063cd8 LW	59
378cc40b	60	end : END '{' maybe states '}'
a687059c	61	{ ends = oper3(OJUNK,ends,$3,$4); $$ = Nullop; }
8d063cd8 LW	62	\| end NEWLINE
8d063cd8 LW	63	{ $$ = $1; }
8d063cd8 LW	64	;
	65
	66	hunks : hunks hunk junk
	67	{ $$ = oper3(OHUNKS,$1,$2,$3); }
	68	\| /* NULL */
	69	{ $$ = Nullop; }
	70	;
	71
	72	hunk : patpat
	73	{ $$ = oper1(OHUNK,$1); need_entire = TRUE; }
378cc40b LW	74	\| patpat '{' maybe states '}'
378cc40b LW	75	{ $$ = oper2(OHUNK,$1,oper2(OJUNK,$3,$4)); }
a687059c LW	76	\| FUNCTION USERFUN '(' arg_list ')' maybe '{' maybe states '}'
a687059c LW	77	{ fixfargs($2,$4,0); $$ = oper5(OUSERDEF,$2,$4,$6,$8,$9); }
378cc40b LW	78	\| '{' maybe states '}'
378cc40b LW	79	{ $$ = oper2(OHUNK,Nullop,oper2(OJUNK,$2,$3)); }
a687059c LW	80	\| begin
	81	\| end
	82	;
	83
	84	arg_list: expr_list
	85	{ $$ = rememberargs($$); }
8d063cd8 LW	86	;
8d063cd8 LW	87
449aadca	88	patpat : cond
8d063cd8	89	{ $$ = oper1(OPAT,$1); }
449aadca	90	\| cond ',' cond
8d063cd8 LW	91	{ $$ = oper2(ORANGE,$1,$3); }
	92	;
	93
8d063cd8 LW	94	cond : expr
	95	\| match
	96	\| rel
	97	\| compound_cond
2304df62 AD	98	\| cond '?' expr ':' expr
2304df62 AD	99	{ $$ = oper3(OCOND,$1,$3,$5); }
8d063cd8 LW	100	;
	101
	102	compound_cond
	103	: '(' compound_cond ')'
	104	{ $$ = oper1(OCPAREN,$2); }
a687059c LW	105	\| cond ANDAND maybe cond
	106	{ $$ = oper3(OCANDAND,$1,$3,$4); }
	107	\| cond OROR maybe cond
	108	{ $$ = oper3(OCOROR,$1,$3,$4); }
8d063cd8 LW	109	\| NOT cond
	110	{ $$ = oper1(OCNOT,$2); }
	111	;
	112
	113	rel : expr RELOP expr
	114	{ $$ = oper3(ORELOP,$2,$1,$3); }
a687059c LW	115	\| expr '>' expr
	116	{ $$ = oper3(ORELOP,string(">",1),$1,$3); }
	117	\| expr '<' expr
	118	{ $$ = oper3(ORELOP,string("<",1),$1,$3); }
8d063cd8 LW	119	\| '(' rel ')'
	120	{ $$ = oper1(ORPAREN,$2); }
	121	;
	122
a687059c LW	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 LW	127	\| REGEX %prec MATCHOP
a687059c LW	128	{ $$ = oper1(OREGEX,$1); }
8d063cd8 LW	129	\| '(' match ')'
	130	{ $$ = oper1(OMPAREN,$2); }
	131	;
	132
	133	expr : term
	134	{ $$ = $1; }
	135	\| expr term
	136	{ $$ = oper2(OCONCAT,$1,$2); }
c822f08a CS	137	\| expr '?' expr ':' expr
c822f08a CS	138	{ $$ = oper3(OCOND,$1,$3,$5); }
87250799	139	\| variable ASGNOP cond
4cec2b33 BD	140	{
	141	$$ = oper3(OASSIGN,$2,$1,$3);
	142	if ((ops[$1].ival & 255) == OFLD)
	143	lval_field = TRUE;
	144	else if ((ops[$1].ival & 255) == OVFLD)
	145	lval_field = TRUE;
8d063cd8 LW	146	}
	147	;
	148
2efaeb47 AD	149	sprintf : SPRINTF_NEW
	150	\| SPRINTF_OLD ;
	151
8d063cd8 LW	152	term : variable
8d063cd8 LW	153	{ $$ = $1; }
a687059c LW	154	\| NUMBER
	155	{ $$ = oper1(ONUM,$1); }
	156	\| STRING
	157	{ $$ = oper1(OSTR,$1); }
8d063cd8 LW	158	\| term '+' term
	159	{ $$ = oper2(OADD,$1,$3); }
	160	\| term '-' term
a687059c	161	{ $$ = oper2(OSUBTRACT,$1,$3); }
8d063cd8 LW	162	\| term '*' term
	163	{ $$ = oper2(OMULT,$1,$3); }
	164	\| term '/' term
	165	{ $$ = oper2(ODIV,$1,$3); }
	166	\| term '%' term
	167	{ $$ = oper2(OMOD,$1,$3); }
a687059c LW	168	\| term '^' term
	169	{ $$ = oper2(OPOW,$1,$3); }
	170	\| term IN VAR
	171	{ $$ = oper2(ODEFINED,aryrefarg($3),$1); }
8d063cd8	172	\| variable INCR
4cec2b33 BD	173	{
	174	$$ = oper1(OPOSTINCR,$1);
	175	if ((ops[$1].ival & 255) == OFLD)
	176	lval_field = TRUE;
	177	else if ((ops[$1].ival & 255) == OVFLD)
	178	lval_field = TRUE;
	179	}
8d063cd8	180	\| variable DECR
4cec2b33 BD	181	{
	182	$$ = oper1(OPOSTDECR,$1);
	183	if ((ops[$1].ival & 255) == OFLD)
	184	lval_field = TRUE;
	185	else if ((ops[$1].ival & 255) == OVFLD)
	186	lval_field = TRUE;
	187	}
8d063cd8	188	\| INCR variable
4cec2b33 BD	189	{
	190	$$ = oper1(OPREINCR,$2);
	191	if ((ops[$2].ival & 255) == OFLD)
	192	lval_field = TRUE;
	193	else if ((ops[$2].ival & 255) == OVFLD)
	194	lval_field = TRUE;
	195	}
8d063cd8	196	\| DECR variable
4cec2b33 BD	197	{
	198	$$ = oper1(OPREDECR,$2);
	199	if ((ops[$2].ival & 255) == OFLD)
	200	lval_field = TRUE;
	201	else if ((ops[$2].ival & 255) == OVFLD)
	202	lval_field = TRUE;
	203	}
8d063cd8 LW	204	\| '-' term %prec UMINUS
	205	{ $$ = oper1(OUMINUS,$2); }
	206	\| '+' term %prec UMINUS
	207	{ $$ = oper1(OUPLUS,$2); }
449aadca	208	\| '(' cond ')'
8d063cd8 LW	209	{ $$ = oper1(OPAREN,$2); }
	210	\| GETLINE
	211	{ $$ = oper0(OGETLINE); }
bf10efe7	212	\| GETLINE variable
a687059c LW	213	{ $$ = oper1(OGETLINE,$2); }
	214	\| GETLINE '<' expr
	215	{ $$ = oper3(OGETLINE,Nullop,string("<",1),$3);
	216	if (ops[$3].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
bf10efe7	217	\| GETLINE variable '<' expr
a687059c LW	218	{ $$ = oper3(OGETLINE,$2,string("<",1),$4);
	219	if (ops[$4].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
	220	\| term 'p' GETLINE
	221	{ $$ = oper3(OGETLINE,Nullop,string("\|",1),$1);
	222	if (ops[$1].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
bf10efe7	223	\| term 'p' GETLINE variable
a687059c LW	224	{ $$ = oper3(OGETLINE,$4,string("\|",1),$1);
a687059c LW	225	if (ops[$1].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
8d063cd8 LW	226	\| FUN1
	227	{ $$ = oper0($1); need_entire = do_chop = TRUE; }
	228	\| FUN1 '(' ')'
	229	{ $$ = oper1($1,Nullop); need_entire = do_chop = TRUE; }
	230	\| FUN1 '(' expr ')'
	231	{ $$ = oper1($1,$3); }
a687059c LW	232	\| FUNN '(' expr_list ')'
	233	{ $$ = oper1($1,$3); }
	234	\| USERFUN '(' expr_list ')'
	235	{ $$ = oper2(OUSERFUN,$1,$3); }
2efaeb47 AD	236	\| SPRINTF_NEW '(' expr_list ')'
	237	{ $$ = oper1(OSPRINTF,$3); }
	238	\| sprintf expr_list
8d063cd8 LW	239	{ $$ = oper1(OSPRINTF,$2); }
	240	\| SUBSTR '(' expr ',' expr ',' expr ')'
	241	{ $$ = oper3(OSUBSTR,$3,$5,$7); }
	242	\| SUBSTR '(' expr ',' expr ')'
	243	{ $$ = oper2(OSUBSTR,$3,$5); }
	244	\| SPLIT '(' expr ',' VAR ',' expr ')'
a687059c	245	{ $$ = oper3(OSPLIT,$3,aryrefarg(numary($5)),$7); }
7e1cf235 LW	246	\| SPLIT '(' expr ',' VAR ',' REGEX ')'
7e1cf235 LW	247	{ $$ = oper3(OSPLIT,$3,aryrefarg(numary($5)),oper1(OREGEX,$7));}
8d063cd8	248	\| SPLIT '(' expr ',' VAR ')'
a687059c	249	{ $$ = oper2(OSPLIT,$3,aryrefarg(numary($5))); }
8d063cd8 LW	250	\| INDEX '(' expr ',' expr ')'
8d063cd8 LW	251	{ $$ = oper2(OINDEX,$3,$5); }
a687059c LW	252	\| MATCH '(' expr ',' REGEX ')'
	253	{ $$ = oper2(OMATCH,$3,oper1(OREGEX,$5)); }
	254	\| MATCH '(' expr ',' expr ')'
	255	{ $$ = oper2(OMATCH,$3,$5); }
	256	\| SUB '(' expr ',' expr ')'
	257	{ $$ = oper2(OSUB,$3,$5); }
	258	\| SUB '(' REGEX ',' expr ')'
	259	{ $$ = oper2(OSUB,oper1(OREGEX,$3),$5); }
	260	\| GSUB '(' expr ',' expr ')'
	261	{ $$ = oper2(OGSUB,$3,$5); }
	262	\| GSUB '(' REGEX ',' expr ')'
	263	{ $$ = oper2(OGSUB,oper1(OREGEX,$3),$5); }
	264	\| SUB '(' expr ',' expr ',' expr ')'
	265	{ $$ = oper3(OSUB,$3,$5,$7); }
	266	\| SUB '(' REGEX ',' expr ',' expr ')'
	267	{ $$ = oper3(OSUB,oper1(OREGEX,$3),$5,$7); }
	268	\| GSUB '(' expr ',' expr ',' expr ')'
	269	{ $$ = oper3(OGSUB,$3,$5,$7); }
	270	\| GSUB '(' REGEX ',' expr ',' expr ')'
	271	{ $$ = oper3(OGSUB,oper1(OREGEX,$3),$5,$7); }
8d063cd8 LW	272	;
8d063cd8 LW	273
a687059c	274	variable: VAR
8d063cd8	275	{ $$ = oper1(OVAR,$1); }
a687059c LW	276	\| VAR '[' expr_list ']'
a687059c LW	277	{ $$ = oper2(OVAR,aryrefarg($1),$3); }
8d063cd8 LW	278	\| FIELD
8d063cd8 LW	279	{ $$ = oper1(OFLD,$1); }
4cec2b33 BD	280	\| SVFIELD
4cec2b33 BD	281	{ $$ = oper1(OVFLD,oper1(OVAR,$1)); }
8d063cd8 LW	282	\| VFIELD term
	283	{ $$ = oper1(OVFLD,$2); }
	284	;
	285
a687059c	286	expr_list
8d063cd8 LW	287	: expr
	288	\| clist
	289	\| /* NULL */
	290	{ $$ = Nullop; }
	291	;
	292
a687059c LW	293	clist : expr ',' maybe expr
	294	{ $$ = oper3(OCOMMA,$1,$3,$4); }
	295	\| clist ',' maybe expr
	296	{ $$ = oper3(OCOMMA,$1,$3,$4); }
8d063cd8 LW	297	\| '(' clist ')' /* these parens are invisible */
	298	{ $$ = $2; }
	299	;
	300
	301	junk : junk hunksep
	302	{ $$ = oper2(OJUNK,$1,$2); }
	303	\| /* NULL */
	304	{ $$ = Nullop; }
	305	;
	306
	307	hunksep : ';'
a687059c	308	{ $$ = oper2(OJUNK,oper0(OSEMICOLON),oper0(ONEWLINE)); }
8d063cd8	309	\| SEMINEW
a687059c	310	{ $$ = oper2(OJUNK,oper0(OSEMICOLON),oper0(ONEWLINE)); }
8d063cd8 LW	311	\| NEWLINE
	312	{ $$ = oper0(ONEWLINE); }
	313	\| COMMENT
	314	{ $$ = oper1(OCOMMENT,$1); }
	315	;
	316
378cc40b LW	317	maybe : maybe nlstuff
	318	{ $$ = oper2(OJUNK,$1,$2); }
	319	\| /* NULL */
	320	{ $$ = Nullop; }
	321	;
	322
	323	nlstuff : NEWLINE
	324	{ $$ = oper0(ONEWLINE); }
8d063cd8	325	\| COMMENT
378cc40b LW	326	{ $$ = oper1(OCOMMENT,$1); }
	327	;
	328
	329	separator
	330	: ';' maybe
	331	{ $$ = oper2(OJUNK,oper0(OSEMICOLON),$2); }
	332	\| SEMINEW maybe
	333	{ $$ = oper2(OJUNK,oper0(OSNEWLINE),$2); }
	334	\| NEWLINE maybe
	335	{ $$ = oper2(OJUNK,oper0(OSNEWLINE),$2); }
	336	\| COMMENT maybe
	337	{ $$ = oper2(OJUNK,oper1(OSCOMMENT,$1),$2); }
8d063cd8 LW	338	;
	339
	340	states : states statement
	341	{ $$ = oper2(OSTATES,$1,$2); }
	342	\| /* NULL */
	343	{ $$ = Nullop; }
	344	;
	345
	346	statement
378cc40b LW	347	: simple separator maybe
	348	{ $$ = oper2(OJUNK,oper2(OSTATE,$1,$2),$3); }
	349	\| ';' maybe
	350	{ $$ = oper2(OSTATE,Nullop,oper2(OJUNK,oper0(OSEMICOLON),$2)); }
	351	\| SEMINEW maybe
	352	{ $$ = oper2(OSTATE,Nullop,oper2(OJUNK,oper0(OSNEWLINE),$2)); }
8d063cd8 LW	353	\| compound
	354	;
	355
378cc40b LW	356	simpnull: simple
	357	\| /* NULL */
	358	{ $$ = Nullop; }
	359	;
	360
8d063cd8 LW	361	simple
8d063cd8 LW	362	: expr
a687059c	363	\| PRINT expr_list redir expr
8d063cd8 LW	364	{ $$ = oper3(OPRINT,$2,$3,$4);
	365	do_opens = TRUE;
	366	saw_ORS = saw_OFS = TRUE;
	367	if (!$2) need_entire = TRUE;
	368	if (ops[$4].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
a687059c	369	\| PRINT expr_list
8d063cd8 LW	370	{ $$ = oper1(OPRINT,$2);
	371	if (!$2) need_entire = TRUE;
	372	saw_ORS = saw_OFS = TRUE;
	373	}
a687059c	374	\| PRINTF expr_list redir expr
8d063cd8 LW	375	{ $$ = oper3(OPRINTF,$2,$3,$4);
	376	do_opens = TRUE;
	377	if (!$2) need_entire = TRUE;
	378	if (ops[$4].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
a687059c	379	\| PRINTF expr_list
8d063cd8 LW	380	{ $$ = oper1(OPRINTF,$2);
	381	if (!$2) need_entire = TRUE;
	382	}
	383	\| BREAK
	384	{ $$ = oper0(OBREAK); }
	385	\| NEXT
	386	{ $$ = oper0(ONEXT); }
	387	\| EXIT
	388	{ $$ = oper0(OEXIT); }
	389	\| EXIT expr
	390	{ $$ = oper1(OEXIT,$2); }
	391	\| CONTINUE
	392	{ $$ = oper0(OCONTINUE); }
a687059c LW	393	\| RET
	394	{ $$ = oper0(ORETURN); }
	395	\| RET expr
	396	{ $$ = oper1(ORETURN,$2); }
2304df62	397	\| DELETE VAR '[' expr_list ']'
a687059c	398	{ $$ = oper2(ODELETE,aryrefarg($2),$4); }
8d063cd8 LW	399	;
8d063cd8 LW	400
a687059c	401	redir : '>' %prec FIELD
7e1cf235	402	{ $$ = oper1(OREDIR,string(">",1)); }
8d063cd8 LW	403	\| GRGR
	404	{ $$ = oper1(OREDIR,string(">>",2)); }
	405	\| '\|'
	406	{ $$ = oper1(OREDIR,string("\|",1)); }
	407	;
	408
	409	compound
	410	: IF '(' cond ')' maybe statement
	411	{ $$ = oper2(OIF,$3,bl($6,$5)); }
	412	\| IF '(' cond ')' maybe statement ELSE maybe statement
	413	{ $$ = oper3(OIF,$3,bl($6,$5),bl($9,$8)); }
	414	\| WHILE '(' cond ')' maybe statement
	415	{ $$ = oper2(OWHILE,$3,bl($6,$5)); }
a687059c LW	416	\| DO maybe statement WHILE '(' cond ')'
a687059c LW	417	{ $$ = oper2(ODO,bl($3,$2),$6); }
378cc40b	418	\| FOR '(' simpnull ';' cond ';' simpnull ')' maybe statement
8d063cd8	419	{ $$ = oper4(OFOR,$3,$5,$7,bl($10,$9)); }
378cc40b	420	\| FOR '(' simpnull ';' ';' simpnull ')' maybe statement
8d063cd8	421	{ $$ = oper4(OFOR,$3,string("",0),$6,bl($9,$8)); }
a687059c LW	422	\| FOR '(' expr ')' maybe statement
a687059c LW	423	{ $$ = oper2(OFORIN,$3,bl($6,$5)); }
378cc40b LW	424	\| '{' maybe states '}' maybe
378cc40b LW	425	{ $$ = oper3(OBLOCK,oper2(OJUNK,$2,$3),Nullop,$5); }
8d063cd8 LW	426	;
	427
	428	%%
ff0cee69	429
20ce7b12	430	int yyparse (void);
ff0cee69	431
8d063cd8	432	#include "a2py.c"