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|
%{
/* $RCSfile: a2p.y,v $$Revision: 1.1.1.1 $$Date: 1993/08/23 21:30:09 $
*
* Copyright (c) 1991, 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 $
* Revision 1.1.1.1 1993/08/23 21:30:09 nate
* PERL!
*
* Revision 4.0.1.2 92/06/08 16:13:03 lwall
* patch20: in a2p, getline should allow variable to be array element
*
* Revision 4.0.1.1 91/06/07 12:12:41 lwall
* patch4: new copyright notice
*
* 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
{ $$ = oper0(OGETLINE); }
| GETLINE variable
{ $$ = 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
{ $$ = oper1(ORETURN,$2); }
| DELETE VAR '[' expr ']'
{ $$ = 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"
|