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Lex Description | 1991-06-11 | 9.7 KB | 401 lines |
- %{
- /* $RCSfile: a2p.y,v $$Revision: 4.0.1.1 $$Date: 91/06/07 12:12:41 $
- *
- * 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 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
- { $$ = oper0(OGETLINE); }
- | GETLINE VAR
- { $$ = 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"
-