2 /* $RCSfile: a2p.y,v $$Revision: 4.1 $$Date: 92/08/07 18:29:12 $
4 * Copyright (C) 1991, 1992, 1993, 1994, 1996, 1997, 1999, 2000,
5 * by Larry Wall and others
7 * You may distribute under the terms of either the GNU General Public
8 * License or the Artistic License, as specified in the README file.
23 %token SEMINEW NEWLINE COMMENT
25 %token PRINT PRINTF SPRINTF_OLD SPRINTF_NEW SPLIT
26 %token IF ELSE WHILE FOR IN
27 %token EXIT NEXT BREAK CONTINUE RET
28 %token GETLINE DO SUB GSUB MATCH
29 %token FUNCTION USERFUN DELETE
36 %left NUMBER VAR SUBSTR INDEX
52 { root = oper4(OPROG,$1,begins,$2,ends); }
55 begin : BEGIN '{' maybe states '}' junk
56 { begins = oper4(OJUNK,begins,$3,$4,$6); in_begin = FALSE;
60 end : END '{' maybe states '}'
61 { ends = oper3(OJUNK,ends,$3,$4); $$ = Nullop; }
66 hunks : hunks hunk junk
67 { $$ = oper3(OHUNKS,$1,$2,$3); }
73 { $$ = oper1(OHUNK,$1); need_entire = TRUE; }
74 | patpat '{' maybe states '}'
75 { $$ = oper2(OHUNK,$1,oper2(OJUNK,$3,$4)); }
76 | FUNCTION USERFUN '(' arg_list ')' maybe '{' maybe states '}'
77 { fixfargs($2,$4,0); $$ = oper5(OUSERDEF,$2,$4,$6,$8,$9); }
78 | '{' maybe states '}'
79 { $$ = oper2(OHUNK,Nullop,oper2(OJUNK,$2,$3)); }
85 { $$ = rememberargs($$); }
89 { $$ = oper1(OPAT,$1); }
91 { $$ = oper2(ORANGE,$1,$3); }
98 | cond '?' expr ':' expr
99 { $$ = oper3(OCOND,$1,$3,$5); }
103 : '(' compound_cond ')'
104 { $$ = oper1(OCPAREN,$2); }
105 | cond ANDAND maybe cond
106 { $$ = oper3(OCANDAND,$1,$3,$4); }
107 | cond OROR maybe cond
108 { $$ = oper3(OCOROR,$1,$3,$4); }
110 { $$ = oper1(OCNOT,$2); }
113 rel : expr RELOP expr
114 { $$ = oper3(ORELOP,$2,$1,$3); }
116 { $$ = oper3(ORELOP,string(">",1),$1,$3); }
118 { $$ = oper3(ORELOP,string("<",1),$1,$3); }
120 { $$ = oper1(ORPAREN,$2); }
123 match : expr MATCHOP expr
124 { $$ = oper3(OMATCHOP,$2,$1,$3); }
126 { $$ = oper3(OMATCHOP,$2,$1,oper1(OREGEX,$3)); }
127 | REGEX %prec MATCHOP
128 { $$ = oper1(OREGEX,$1); }
130 { $$ = oper1(OMPAREN,$2); }
136 { $$ = oper2(OCONCAT,$1,$2); }
137 | expr '?' expr ':' expr
138 { $$ = oper3(OCOND,$1,$3,$5); }
139 | variable ASGNOP cond
140 { $$ = oper3(OASSIGN,$2,$1,$3);
141 if ((ops[$1].ival & 255) == OFLD)
143 if ((ops[$1].ival & 255) == OVFLD)
148 sprintf : SPRINTF_NEW
154 { $$ = oper1(ONUM,$1); }
156 { $$ = oper1(OSTR,$1); }
158 { $$ = oper2(OADD,$1,$3); }
160 { $$ = oper2(OSUBTRACT,$1,$3); }
162 { $$ = oper2(OMULT,$1,$3); }
164 { $$ = oper2(ODIV,$1,$3); }
166 { $$ = oper2(OMOD,$1,$3); }
168 { $$ = oper2(OPOW,$1,$3); }
170 { $$ = oper2(ODEFINED,aryrefarg($3),$1); }
172 { $$ = oper1(OPOSTINCR,$1); }
174 { $$ = oper1(OPOSTDECR,$1); }
176 { $$ = oper1(OPREINCR,$2); }
178 { $$ = oper1(OPREDECR,$2); }
179 | '-' term %prec UMINUS
180 { $$ = oper1(OUMINUS,$2); }
181 | '+' term %prec UMINUS
182 { $$ = oper1(OUPLUS,$2); }
184 { $$ = oper1(OPAREN,$2); }
186 { $$ = oper0(OGETLINE); }
188 { $$ = oper1(OGETLINE,$2); }
190 { $$ = oper3(OGETLINE,Nullop,string("<",1),$3);
191 if (ops[$3].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
192 | GETLINE variable '<' expr
193 { $$ = oper3(OGETLINE,$2,string("<",1),$4);
194 if (ops[$4].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
196 { $$ = oper3(OGETLINE,Nullop,string("|",1),$1);
197 if (ops[$1].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
198 | term 'p' GETLINE variable
199 { $$ = oper3(OGETLINE,$4,string("|",1),$1);
200 if (ops[$1].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
202 { $$ = oper0($1); need_entire = do_chop = TRUE; }
204 { $$ = oper1($1,Nullop); need_entire = do_chop = TRUE; }
206 { $$ = oper1($1,$3); }
207 | FUNN '(' expr_list ')'
208 { $$ = oper1($1,$3); }
209 | USERFUN '(' expr_list ')'
210 { $$ = oper2(OUSERFUN,$1,$3); }
211 | SPRINTF_NEW '(' expr_list ')'
212 { $$ = oper1(OSPRINTF,$3); }
214 { $$ = oper1(OSPRINTF,$2); }
215 | SUBSTR '(' expr ',' expr ',' expr ')'
216 { $$ = oper3(OSUBSTR,$3,$5,$7); }
217 | SUBSTR '(' expr ',' expr ')'
218 { $$ = oper2(OSUBSTR,$3,$5); }
219 | SPLIT '(' expr ',' VAR ',' expr ')'
220 { $$ = oper3(OSPLIT,$3,aryrefarg(numary($5)),$7); }
221 | SPLIT '(' expr ',' VAR ',' REGEX ')'
222 { $$ = oper3(OSPLIT,$3,aryrefarg(numary($5)),oper1(OREGEX,$7));}
223 | SPLIT '(' expr ',' VAR ')'
224 { $$ = oper2(OSPLIT,$3,aryrefarg(numary($5))); }
225 | INDEX '(' expr ',' expr ')'
226 { $$ = oper2(OINDEX,$3,$5); }
227 | MATCH '(' expr ',' REGEX ')'
228 { $$ = oper2(OMATCH,$3,oper1(OREGEX,$5)); }
229 | MATCH '(' expr ',' expr ')'
230 { $$ = oper2(OMATCH,$3,$5); }
231 | SUB '(' expr ',' expr ')'
232 { $$ = oper2(OSUB,$3,$5); }
233 | SUB '(' REGEX ',' expr ')'
234 { $$ = oper2(OSUB,oper1(OREGEX,$3),$5); }
235 | GSUB '(' expr ',' expr ')'
236 { $$ = oper2(OGSUB,$3,$5); }
237 | GSUB '(' REGEX ',' expr ')'
238 { $$ = oper2(OGSUB,oper1(OREGEX,$3),$5); }
239 | SUB '(' expr ',' expr ',' expr ')'
240 { $$ = oper3(OSUB,$3,$5,$7); }
241 | SUB '(' REGEX ',' expr ',' expr ')'
242 { $$ = oper3(OSUB,oper1(OREGEX,$3),$5,$7); }
243 | GSUB '(' expr ',' expr ',' expr ')'
244 { $$ = oper3(OGSUB,$3,$5,$7); }
245 | GSUB '(' REGEX ',' expr ',' expr ')'
246 { $$ = oper3(OGSUB,oper1(OREGEX,$3),$5,$7); }
250 { $$ = oper1(OVAR,$1); }
251 | VAR '[' expr_list ']'
252 { $$ = oper2(OVAR,aryrefarg($1),$3); }
254 { $$ = oper1(OFLD,$1); }
256 { $$ = oper1(OVFLD,$2); }
266 clist : expr ',' maybe expr
267 { $$ = oper3(OCOMMA,$1,$3,$4); }
268 | clist ',' maybe expr
269 { $$ = oper3(OCOMMA,$1,$3,$4); }
270 | '(' clist ')' /* these parens are invisible */
275 { $$ = oper2(OJUNK,$1,$2); }
281 { $$ = oper2(OJUNK,oper0(OSEMICOLON),oper0(ONEWLINE)); }
283 { $$ = oper2(OJUNK,oper0(OSEMICOLON),oper0(ONEWLINE)); }
285 { $$ = oper0(ONEWLINE); }
287 { $$ = oper1(OCOMMENT,$1); }
290 maybe : maybe nlstuff
291 { $$ = oper2(OJUNK,$1,$2); }
297 { $$ = oper0(ONEWLINE); }
299 { $$ = oper1(OCOMMENT,$1); }
304 { $$ = oper2(OJUNK,oper0(OSEMICOLON),$2); }
306 { $$ = oper2(OJUNK,oper0(OSNEWLINE),$2); }
308 { $$ = oper2(OJUNK,oper0(OSNEWLINE),$2); }
310 { $$ = oper2(OJUNK,oper1(OSCOMMENT,$1),$2); }
313 states : states statement
314 { $$ = oper2(OSTATES,$1,$2); }
320 : simple separator maybe
321 { $$ = oper2(OJUNK,oper2(OSTATE,$1,$2),$3); }
323 { $$ = oper2(OSTATE,Nullop,oper2(OJUNK,oper0(OSEMICOLON),$2)); }
325 { $$ = oper2(OSTATE,Nullop,oper2(OJUNK,oper0(OSNEWLINE),$2)); }
336 | PRINT expr_list redir expr
337 { $$ = oper3(OPRINT,$2,$3,$4);
339 saw_ORS = saw_OFS = TRUE;
340 if (!$2) need_entire = TRUE;
341 if (ops[$4].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
343 { $$ = oper1(OPRINT,$2);
344 if (!$2) need_entire = TRUE;
345 saw_ORS = saw_OFS = TRUE;
347 | PRINTF expr_list redir expr
348 { $$ = oper3(OPRINTF,$2,$3,$4);
350 if (!$2) need_entire = TRUE;
351 if (ops[$4].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
353 { $$ = oper1(OPRINTF,$2);
354 if (!$2) need_entire = TRUE;
357 { $$ = oper0(OBREAK); }
359 { $$ = oper0(ONEXT); }
361 { $$ = oper0(OEXIT); }
363 { $$ = oper1(OEXIT,$2); }
365 { $$ = oper0(OCONTINUE); }
367 { $$ = oper0(ORETURN); }
369 { $$ = oper1(ORETURN,$2); }
370 | DELETE VAR '[' expr_list ']'
371 { $$ = oper2(ODELETE,aryrefarg($2),$4); }
374 redir : '>' %prec FIELD
375 { $$ = oper1(OREDIR,string(">",1)); }
377 { $$ = oper1(OREDIR,string(">>",2)); }
379 { $$ = oper1(OREDIR,string("|",1)); }
383 : IF '(' cond ')' maybe statement
384 { $$ = oper2(OIF,$3,bl($6,$5)); }
385 | IF '(' cond ')' maybe statement ELSE maybe statement
386 { $$ = oper3(OIF,$3,bl($6,$5),bl($9,$8)); }
387 | WHILE '(' cond ')' maybe statement
388 { $$ = oper2(OWHILE,$3,bl($6,$5)); }
389 | DO maybe statement WHILE '(' cond ')'
390 { $$ = oper2(ODO,bl($3,$2),$6); }
391 | FOR '(' simpnull ';' cond ';' simpnull ')' maybe statement
392 { $$ = oper4(OFOR,$3,$5,$7,bl($10,$9)); }
393 | FOR '(' simpnull ';' ';' simpnull ')' maybe statement
394 { $$ = oper4(OFOR,$3,string("",0),$6,bl($9,$8)); }
395 | FOR '(' expr ')' maybe statement
396 { $$ = oper2(OFORIN,$3,bl($6,$5)); }
397 | '{' maybe states '}' maybe
398 { $$ = oper3(OBLOCK,oper2(OJUNK,$2,$3),Nullop,$5); }