2 /* $RCSfile: a2p.y,v $$Revision: 4.1 $$Date: 92/08/07 18:29:12 $
4 * Copyright (c) 1991, Larry Wall
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
10 * Revision 4.1 92/08/07 18:29:12 lwall
12 * Revision 4.0.1.2 92/06/08 16:13:03 lwall
13 * patch20: in a2p, getline should allow variable to be array element
15 * Revision 4.0.1.1 91/06/07 12:12:41 lwall
16 * patch4: new copyright notice
18 * Revision 4.0 91/03/20 01:57:21 lwall
33 %token SEMINEW NEWLINE COMMENT
35 %token PRINT PRINTF SPRINTF SPLIT
36 %token IF ELSE WHILE FOR IN
37 %token EXIT NEXT BREAK CONTINUE RET
38 %token GETLINE DO SUB GSUB MATCH
39 %token FUNCTION USERFUN DELETE
46 %left NUMBER VAR SUBSTR INDEX
62 { root = oper4(OPROG,$1,begins,$2,ends); }
65 begin : BEGIN '{' maybe states '}' junk
66 { begins = oper4(OJUNK,begins,$3,$4,$6); in_begin = FALSE;
70 end : END '{' maybe states '}'
71 { ends = oper3(OJUNK,ends,$3,$4); $$ = Nullop; }
76 hunks : hunks hunk junk
77 { $$ = oper3(OHUNKS,$1,$2,$3); }
83 { $$ = oper1(OHUNK,$1); need_entire = TRUE; }
84 | patpat '{' maybe states '}'
85 { $$ = oper2(OHUNK,$1,oper2(OJUNK,$3,$4)); }
86 | FUNCTION USERFUN '(' arg_list ')' maybe '{' maybe states '}'
87 { fixfargs($2,$4,0); $$ = oper5(OUSERDEF,$2,$4,$6,$8,$9); }
88 | '{' maybe states '}'
89 { $$ = oper2(OHUNK,Nullop,oper2(OJUNK,$2,$3)); }
95 { $$ = rememberargs($$); }
99 { $$ = oper1(OPAT,$1); }
101 { $$ = oper2(ORANGE,$1,$3); }
108 | cond '?' expr ':' expr
109 { $$ = oper3(OCOND,$1,$3,$5); }
113 : '(' compound_cond ')'
114 { $$ = oper1(OCPAREN,$2); }
115 | cond ANDAND maybe cond
116 { $$ = oper3(OCANDAND,$1,$3,$4); }
117 | cond OROR maybe cond
118 { $$ = oper3(OCOROR,$1,$3,$4); }
120 { $$ = oper1(OCNOT,$2); }
123 rel : expr RELOP expr
124 { $$ = oper3(ORELOP,$2,$1,$3); }
126 { $$ = oper3(ORELOP,string(">",1),$1,$3); }
128 { $$ = oper3(ORELOP,string("<",1),$1,$3); }
130 { $$ = oper1(ORPAREN,$2); }
133 match : expr MATCHOP expr
134 { $$ = oper3(OMATCHOP,$2,$1,$3); }
136 { $$ = oper3(OMATCHOP,$2,$1,oper1(OREGEX,$3)); }
137 | REGEX %prec MATCHOP
138 { $$ = oper1(OREGEX,$1); }
140 { $$ = oper1(OMPAREN,$2); }
146 { $$ = oper2(OCONCAT,$1,$2); }
147 | variable ASGNOP cond
148 { $$ = oper3(OASSIGN,$2,$1,$3);
149 if ((ops[$1].ival & 255) == OFLD)
151 if ((ops[$1].ival & 255) == OVFLD)
159 { $$ = oper1(ONUM,$1); }
161 { $$ = oper1(OSTR,$1); }
163 { $$ = oper2(OADD,$1,$3); }
165 { $$ = oper2(OSUBTRACT,$1,$3); }
167 { $$ = oper2(OMULT,$1,$3); }
169 { $$ = oper2(ODIV,$1,$3); }
171 { $$ = oper2(OMOD,$1,$3); }
173 { $$ = oper2(OPOW,$1,$3); }
175 { $$ = oper2(ODEFINED,aryrefarg($3),$1); }
176 | cond '?' expr ':' expr
177 { $$ = oper3(OCOND,$1,$3,$5); }
179 { $$ = oper1(OPOSTINCR,$1); }
181 { $$ = oper1(OPOSTDECR,$1); }
183 { $$ = oper1(OPREINCR,$2); }
185 { $$ = oper1(OPREDECR,$2); }
186 | '-' term %prec UMINUS
187 { $$ = oper1(OUMINUS,$2); }
188 | '+' term %prec UMINUS
189 { $$ = oper1(OUPLUS,$2); }
191 { $$ = oper1(OPAREN,$2); }
193 { $$ = oper0(OGETLINE); }
195 { $$ = oper1(OGETLINE,$2); }
197 { $$ = oper3(OGETLINE,Nullop,string("<",1),$3);
198 if (ops[$3].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
199 | GETLINE variable '<' expr
200 { $$ = oper3(OGETLINE,$2,string("<",1),$4);
201 if (ops[$4].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
203 { $$ = oper3(OGETLINE,Nullop,string("|",1),$1);
204 if (ops[$1].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
205 | term 'p' GETLINE variable
206 { $$ = oper3(OGETLINE,$4,string("|",1),$1);
207 if (ops[$1].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
209 { $$ = oper0($1); need_entire = do_chop = TRUE; }
211 { $$ = oper1($1,Nullop); need_entire = do_chop = TRUE; }
213 { $$ = oper1($1,$3); }
214 | FUNN '(' expr_list ')'
215 { $$ = oper1($1,$3); }
216 | USERFUN '(' expr_list ')'
217 { $$ = oper2(OUSERFUN,$1,$3); }
219 { $$ = oper1(OSPRINTF,$2); }
220 | SUBSTR '(' expr ',' expr ',' expr ')'
221 { $$ = oper3(OSUBSTR,$3,$5,$7); }
222 | SUBSTR '(' expr ',' expr ')'
223 { $$ = oper2(OSUBSTR,$3,$5); }
224 | SPLIT '(' expr ',' VAR ',' expr ')'
225 { $$ = oper3(OSPLIT,$3,aryrefarg(numary($5)),$7); }
226 | SPLIT '(' expr ',' VAR ',' REGEX ')'
227 { $$ = oper3(OSPLIT,$3,aryrefarg(numary($5)),oper1(OREGEX,$7));}
228 | SPLIT '(' expr ',' VAR ')'
229 { $$ = oper2(OSPLIT,$3,aryrefarg(numary($5))); }
230 | INDEX '(' expr ',' expr ')'
231 { $$ = oper2(OINDEX,$3,$5); }
232 | MATCH '(' expr ',' REGEX ')'
233 { $$ = oper2(OMATCH,$3,oper1(OREGEX,$5)); }
234 | MATCH '(' expr ',' expr ')'
235 { $$ = oper2(OMATCH,$3,$5); }
236 | SUB '(' expr ',' expr ')'
237 { $$ = oper2(OSUB,$3,$5); }
238 | SUB '(' REGEX ',' expr ')'
239 { $$ = oper2(OSUB,oper1(OREGEX,$3),$5); }
240 | GSUB '(' expr ',' expr ')'
241 { $$ = oper2(OGSUB,$3,$5); }
242 | GSUB '(' REGEX ',' expr ')'
243 { $$ = oper2(OGSUB,oper1(OREGEX,$3),$5); }
244 | SUB '(' expr ',' expr ',' expr ')'
245 { $$ = oper3(OSUB,$3,$5,$7); }
246 | SUB '(' REGEX ',' expr ',' expr ')'
247 { $$ = oper3(OSUB,oper1(OREGEX,$3),$5,$7); }
248 | GSUB '(' expr ',' expr ',' expr ')'
249 { $$ = oper3(OGSUB,$3,$5,$7); }
250 | GSUB '(' REGEX ',' expr ',' expr ')'
251 { $$ = oper3(OGSUB,oper1(OREGEX,$3),$5,$7); }
255 { $$ = oper1(OVAR,$1); }
256 | VAR '[' expr_list ']'
257 { $$ = oper2(OVAR,aryrefarg($1),$3); }
259 { $$ = oper1(OFLD,$1); }
261 { $$ = oper1(OVFLD,$2); }
271 clist : expr ',' maybe expr
272 { $$ = oper3(OCOMMA,$1,$3,$4); }
273 | clist ',' maybe expr
274 { $$ = oper3(OCOMMA,$1,$3,$4); }
275 | '(' clist ')' /* these parens are invisible */
280 { $$ = oper2(OJUNK,$1,$2); }
286 { $$ = oper2(OJUNK,oper0(OSEMICOLON),oper0(ONEWLINE)); }
288 { $$ = oper2(OJUNK,oper0(OSEMICOLON),oper0(ONEWLINE)); }
290 { $$ = oper0(ONEWLINE); }
292 { $$ = oper1(OCOMMENT,$1); }
295 maybe : maybe nlstuff
296 { $$ = oper2(OJUNK,$1,$2); }
302 { $$ = oper0(ONEWLINE); }
304 { $$ = oper1(OCOMMENT,$1); }
309 { $$ = oper2(OJUNK,oper0(OSEMICOLON),$2); }
311 { $$ = oper2(OJUNK,oper0(OSNEWLINE),$2); }
313 { $$ = oper2(OJUNK,oper0(OSNEWLINE),$2); }
315 { $$ = oper2(OJUNK,oper1(OSCOMMENT,$1),$2); }
318 states : states statement
319 { $$ = oper2(OSTATES,$1,$2); }
325 : simple separator maybe
326 { $$ = oper2(OJUNK,oper2(OSTATE,$1,$2),$3); }
328 { $$ = oper2(OSTATE,Nullop,oper2(OJUNK,oper0(OSEMICOLON),$2)); }
330 { $$ = oper2(OSTATE,Nullop,oper2(OJUNK,oper0(OSNEWLINE),$2)); }
341 | PRINT expr_list redir expr
342 { $$ = oper3(OPRINT,$2,$3,$4);
344 saw_ORS = saw_OFS = TRUE;
345 if (!$2) need_entire = TRUE;
346 if (ops[$4].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
348 { $$ = oper1(OPRINT,$2);
349 if (!$2) need_entire = TRUE;
350 saw_ORS = saw_OFS = TRUE;
352 | PRINTF expr_list redir expr
353 { $$ = oper3(OPRINTF,$2,$3,$4);
355 if (!$2) need_entire = TRUE;
356 if (ops[$4].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
358 { $$ = oper1(OPRINTF,$2);
359 if (!$2) need_entire = TRUE;
362 { $$ = oper0(OBREAK); }
364 { $$ = oper0(ONEXT); }
366 { $$ = oper0(OEXIT); }
368 { $$ = oper1(OEXIT,$2); }
370 { $$ = oper0(OCONTINUE); }
372 { $$ = oper0(ORETURN); }
374 { $$ = oper1(ORETURN,$2); }
375 | DELETE VAR '[' expr_list ']'
376 { $$ = oper2(ODELETE,aryrefarg($2),$4); }
379 redir : '>' %prec FIELD
380 { $$ = oper1(OREDIR,string(">",1)); }
382 { $$ = oper1(OREDIR,string(">>",2)); }
384 { $$ = oper1(OREDIR,string("|",1)); }
388 : IF '(' cond ')' maybe statement
389 { $$ = oper2(OIF,$3,bl($6,$5)); }
390 | IF '(' cond ')' maybe statement ELSE maybe statement
391 { $$ = oper3(OIF,$3,bl($6,$5),bl($9,$8)); }
392 | WHILE '(' cond ')' maybe statement
393 { $$ = oper2(OWHILE,$3,bl($6,$5)); }
394 | DO maybe statement WHILE '(' cond ')'
395 { $$ = oper2(ODO,bl($3,$2),$6); }
396 | FOR '(' simpnull ';' cond ';' simpnull ')' maybe statement
397 { $$ = oper4(OFOR,$3,$5,$7,bl($10,$9)); }
398 | FOR '(' simpnull ';' ';' simpnull ')' maybe statement
399 { $$ = oper4(OFOR,$3,string("",0),$6,bl($9,$8)); }
400 | FOR '(' expr ')' maybe statement
401 { $$ = oper2(OFORIN,$3,bl($6,$5)); }
402 | '{' maybe states '}' maybe
403 { $$ = oper3(OBLOCK,oper2(OJUNK,$2,$3),Nullop,$5); }