%{
-/* $Header: a2p.y,v 1.0 87/12/18 13:07:05 root Exp $
+/* $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 $
- * Revision 1.0 87/12/18 13:07:05 root
- * Initial revision
- *
*/
#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 GRGR
+%token FUN1 FUNN GRGR
%token PRINT PRINTF SPRINTF SPLIT
%token IF ELSE WHILE FOR IN
-%token EXIT NEXT BREAK CONTINUE
+%token EXIT NEXT BREAK CONTINUE RET
+%token GETLINE DO SUB GSUB MATCH
+%token FUNCTION USERFUN DELETE
%right ASGNOP
+%right '?' ':'
%left OROR
%left ANDAND
-%left NOT
+%left IN
%left NUMBER VAR SUBSTR INDEX
-%left GETLINE
-%nonassoc RELOP MATCHOP
+%left MATCHOP
+%left RELOP '<' '>'
%left OR
%left STRING
%left '+' '-'
%left '*' '/' '%'
%right UMINUS
+%left NOT
+%right '^'
%left INCR DECR
%left FIELD VFIELD
%%
-program : junk begin hunks end
- { root = oper4(OPROG,$1,$2,$3,$4); }
+program : junk hunks
+ { root = oper4(OPROG,$1,begins,$2,ends); }
;
-begin : BEGIN '{' states '}' junk
- { $$ = oper2(OJUNK,$3,$5); in_begin = FALSE; }
- | /* NULL */
- { $$ = Nullop; }
+begin : BEGIN '{' maybe states '}' junk
+ { begins = oper4(OJUNK,begins,$3,$4,$6); in_begin = FALSE;
+ $$ = Nullop; }
;
-end : END '{' states '}'
- { $$ = $3; }
+end : END '{' maybe states '}'
+ { ends = oper3(OJUNK,ends,$3,$4); $$ = Nullop; }
| end NEWLINE
{ $$ = $1; }
- | /* NULL */
- { $$ = Nullop; }
;
hunks : hunks hunk junk
hunk : patpat
{ $$ = oper1(OHUNK,$1); need_entire = TRUE; }
- | patpat '{' states '}'
- { $$ = oper2(OHUNK,$1,$3); }
- | '{' states '}'
- { $$ = oper2(OHUNK,Nullop,$2); }
+ | 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 '}'
+ { $$ = oper2(OHUNK,Nullop,oper2(OJUNK,$2,$3)); }
+ | begin
+ | end
;
-patpat : pat
- { $$ = oper1(OPAT,$1); }
- | pat ',' pat
- { $$ = oper2(ORANGE,$1,$3); }
+arg_list: expr_list
+ { $$ = rememberargs($$); }
;
-pat : REGEX
- { $$ = oper1(OREGEX,$1); }
- | match
- | rel
- | compound_pat
- ;
-
-compound_pat
- : '(' compound_pat ')'
- { $$ = oper1(OPPAREN,$2); }
- | pat ANDAND pat
- { $$ = oper2(OPANDAND,$1,$3); }
- | pat OROR pat
- { $$ = oper2(OPOROR,$1,$3); }
- | NOT pat
- { $$ = oper1(OPNOT,$2); }
+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 cond
- { $$ = oper2(OCANDAND,$1,$3); }
- | cond OROR cond
- { $$ = oper2(OCOROR,$1,$3); }
+ | 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 ')'
{ $$ = oper1(ORPAREN,$2); }
;
-match : expr MATCHOP REGEX
+match : expr MATCHOP expr
{ $$ = oper3(OMATCHOP,$2,$1,$3); }
+ | expr MATCHOP REGEX
+ { $$ = oper3(OMATCHOP,$2,$1,oper1(OREGEX,$3)); }
+ | REGEX %prec MATCHOP
+ { $$ = oper1(OREGEX,$1); }
| '(' match ')'
{ $$ = oper1(OMPAREN,$2); }
;
{ $$ = $1; }
| expr term
{ $$ = oper2(OCONCAT,$1,$2); }
- | variable ASGNOP expr
+ | expr '?' expr ':' expr
+ { $$ = oper3(OCOND,$1,$3,$5); }
+ | variable ASGNOP cond
{ $$ = oper3(OASSIGN,$2,$1,$3);
if ((ops[$1].ival & 255) == OFLD)
lval_field = TRUE;
term : variable
{ $$ = $1; }
+ | NUMBER
+ { $$ = oper1(ONUM,$1); }
+ | STRING
+ { $$ = oper1(OSTR,$1); }
| term '+' term
{ $$ = oper2(OADD,$1,$3); }
| term '-' term
- { $$ = oper2(OSUB,$1,$3); }
+ { $$ = oper2(OSUBTRACT,$1,$3); }
| term '*' term
{ $$ = 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(OUMINUS,$2); }
| '+' term %prec UMINUS
{ $$ = oper1(OUPLUS,$2); }
- | '(' expr ')'
+ | '(' cond ')'
{ $$ = 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 ')'
{ $$ = oper1($1,$3); }
- | SPRINTF print_list
+ | FUNN '(' expr_list ')'
+ { $$ = 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 ')'
- { $$ = oper3(OSPLIT,$3,numary($5),$7); }
+ { $$ = 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,numary($5)); }
+ { $$ = oper2(OSPLIT,$3,aryrefarg(numary($5))); }
| INDEX '(' expr ',' expr ')'
{ $$ = 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: NUMBER
- { $$ = oper1(ONUM,$1); }
- | STRING
- { $$ = oper1(OSTR,$1); }
- | VAR
+variable: VAR
{ $$ = oper1(OVAR,$1); }
- | VAR '[' expr ']'
- { $$ = oper2(OVAR,$1,$3); }
+ | VAR '[' expr_list ']'
+ { $$ = oper2(OVAR,aryrefarg($1),$3); }
| FIELD
{ $$ = oper1(OFLD,$1); }
| VFIELD term
{ $$ = oper1(OVFLD,$2); }
;
-maybe : NEWLINE
- { $$ = oper0(ONEWLINE); }
- | /* NULL */
- { $$ = Nullop; }
- | COMMENT
- { $$ = oper1(OCOMMENT,$1); }
- ;
-
-print_list
+expr_list
: expr
| clist
| /* NULL */
{ $$ = Nullop; }
;
-clist : expr ',' expr
- { $$ = oper2(OCOMMA,$1,$3); }
- | clist ',' expr
- { $$ = oper2(OCOMMA,$1,$3); }
+clist : expr ',' maybe expr
+ { $$ = oper3(OCOMMA,$1,$3,$4); }
+ | clist ',' maybe expr
+ { $$ = oper3(OCOMMA,$1,$3,$4); }
| '(' clist ')' /* these parens are invisible */
{ $$ = $2; }
;
;
hunksep : ';'
- { $$ = oper0(OSEMICOLON); }
+ { $$ = oper2(OJUNK,oper0(OSEMICOLON),oper0(ONEWLINE)); }
| SEMINEW
- { $$ = oper0(OSEMICOLON); }
+ { $$ = oper2(OJUNK,oper0(OSEMICOLON),oper0(ONEWLINE)); }
| NEWLINE
{ $$ = oper0(ONEWLINE); }
| COMMENT
{ $$ = oper1(OCOMMENT,$1); }
;
-separator
- : ';'
- { $$ = oper0(OSEMICOLON); }
- | SEMINEW
- { $$ = oper0(OSNEWLINE); }
- | NEWLINE
- { $$ = oper0(OSNEWLINE); }
+maybe : maybe nlstuff
+ { $$ = oper2(OJUNK,$1,$2); }
+ | /* NULL */
+ { $$ = Nullop; }
+ ;
+
+nlstuff : NEWLINE
+ { $$ = oper0(ONEWLINE); }
| COMMENT
- { $$ = oper1(OSCOMMENT,$1); }
+ { $$ = 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
;
statement
- : simple separator
- { $$ = oper2(OSTATE,$1,$2); }
+ : simple separator maybe
+ { $$ = 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 */
+ { $$ = Nullop; }
+ ;
+
simple
: expr
- | PRINT print_list redir expr
+ | PRINT expr_list redir expr
{ $$ = 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 print_list
+ | PRINT expr_list
{ $$ = oper1(OPRINT,$2);
if (!$2) need_entire = TRUE;
saw_ORS = saw_OFS = TRUE;
}
- | PRINTF print_list redir expr
+ | PRINTF expr_list redir expr
{ $$ = 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 print_list
+ | PRINTF expr_list
{ $$ = oper1(OPRINTF,$2);
if (!$2) need_entire = TRUE;
}
{ $$ = oper1(OEXIT,$2); }
| CONTINUE
{ $$ = oper0(OCONTINUE); }
- | /* NULL */
- { $$ = Nullop; }
+ | RET
+ { $$ = oper0(ORETURN); }
+ | RET expr
+ { $$ = oper1(ORETURN,$2); }
+ | DELETE VAR '[' expr_list ']'
+ { $$ = oper2(ODELETE,aryrefarg($2),$4); }
;
-redir : RELOP
+redir : '>' %prec FIELD
{ $$ = oper1(OREDIR,string(">",1)); }
| GRGR
{ $$ = oper1(OREDIR,string(">>",2)); }
{ $$ = oper3(OIF,$3,bl($6,$5),bl($9,$8)); }
| WHILE '(' cond ')' maybe statement
{ $$ = oper2(OWHILE,$3,bl($6,$5)); }
- | FOR '(' simple ';' cond ';' simple ')' maybe statement
+ | DO maybe statement WHILE '(' cond ')'
+ { $$ = oper2(ODO,bl($3,$2),$6); }
+ | FOR '(' simpnull ';' cond ';' simpnull ')' maybe statement
{ $$ = oper4(OFOR,$3,$5,$7,bl($10,$9)); }
- | FOR '(' simple ';' ';' simple ')' maybe statement
+ | FOR '(' simpnull ';' ';' simpnull ')' maybe statement
{ $$ = oper4(OFOR,$3,string("",0),$6,bl($9,$8)); }
- | FOR '(' VAR IN VAR ')' maybe statement
- { $$ = oper3(OFORIN,$3,$5,bl($8,$7)); }
- | '{' states '}'
- { $$ = oper1(OBLOCK,$2); }
+ | 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"
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