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.
22 %token SEMINEW NEWLINE COMMENT
24 %token PRINT PRINTF SPRINTF SPLIT
25 %token IF ELSE WHILE FOR IN
26 %token EXIT NEXT BREAK CONTINUE RET
27 %token GETLINE DO SUB GSUB MATCH
28 %token FUNCTION USERFUN DELETE
35 %left NUMBER VAR SUBSTR INDEX
51 { root = oper4(OPROG,$1,begins,$2,ends); }
54 begin : BEGIN '{' maybe states '}' junk
55 { begins = oper4(OJUNK,begins,$3,$4,$6); in_begin = FALSE;
59 end : END '{' maybe states '}'
60 { ends = oper3(OJUNK,ends,$3,$4); $$ = Nullop; }
65 hunks : hunks hunk junk
66 { $$ = oper3(OHUNKS,$1,$2,$3); }
72 { $$ = oper1(OHUNK,$1); need_entire = TRUE; }
73 | patpat '{' maybe states '}'
74 { $$ = oper2(OHUNK,$1,oper2(OJUNK,$3,$4)); }
75 | FUNCTION USERFUN '(' arg_list ')' maybe '{' maybe states '}'
76 { fixfargs($2,$4,0); $$ = oper5(OUSERDEF,$2,$4,$6,$8,$9); }
77 | '{' maybe states '}'
78 { $$ = oper2(OHUNK,Nullop,oper2(OJUNK,$2,$3)); }
84 { $$ = rememberargs($$); }
88 { $$ = oper1(OPAT,$1); }
90 { $$ = oper2(ORANGE,$1,$3); }
97 | cond '?' expr ':' expr
98 { $$ = oper3(OCOND,$1,$3,$5); }
102 : '(' compound_cond ')'
103 { $$ = oper1(OCPAREN,$2); }
104 | cond ANDAND maybe cond
105 { $$ = oper3(OCANDAND,$1,$3,$4); }
106 | cond OROR maybe cond
107 { $$ = oper3(OCOROR,$1,$3,$4); }
109 { $$ = oper1(OCNOT,$2); }
112 rel : expr RELOP expr
113 { $$ = oper3(ORELOP,$2,$1,$3); }
115 { $$ = oper3(ORELOP,string(">",1),$1,$3); }
117 { $$ = oper3(ORELOP,string("<",1),$1,$3); }
119 { $$ = oper1(ORPAREN,$2); }
122 match : expr MATCHOP expr
123 { $$ = oper3(OMATCHOP,$2,$1,$3); }
125 { $$ = oper3(OMATCHOP,$2,$1,oper1(OREGEX,$3)); }
126 | REGEX %prec MATCHOP
127 { $$ = oper1(OREGEX,$1); }
129 { $$ = oper1(OMPAREN,$2); }
135 { $$ = oper2(OCONCAT,$1,$2); }
136 | expr '?' expr ':' expr
137 { $$ = oper3(OCOND,$1,$3,$5); }
138 | variable ASGNOP cond
139 { $$ = oper3(OASSIGN,$2,$1,$3);
140 if ((ops[$1].ival & 255) == OFLD)
142 if ((ops[$1].ival & 255) == OVFLD)
150 { $$ = oper1(ONUM,$1); }
152 { $$ = oper1(OSTR,$1); }
154 { $$ = oper2(OADD,$1,$3); }
156 { $$ = oper2(OSUBTRACT,$1,$3); }
158 { $$ = oper2(OMULT,$1,$3); }
160 { $$ = oper2(ODIV,$1,$3); }
162 { $$ = oper2(OMOD,$1,$3); }
164 { $$ = oper2(OPOW,$1,$3); }
166 { $$ = oper2(ODEFINED,aryrefarg($3),$1); }
168 { $$ = oper1(OPOSTINCR,$1); }
170 { $$ = oper1(OPOSTDECR,$1); }
172 { $$ = oper1(OPREINCR,$2); }
174 { $$ = oper1(OPREDECR,$2); }
175 | '-' term %prec UMINUS
176 { $$ = oper1(OUMINUS,$2); }
177 | '+' term %prec UMINUS
178 { $$ = oper1(OUPLUS,$2); }
180 { $$ = oper1(OPAREN,$2); }
182 { $$ = oper0(OGETLINE); }
184 { $$ = oper1(OGETLINE,$2); }
186 { $$ = oper3(OGETLINE,Nullop,string("<",1),$3);
187 if (ops[$3].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
188 | GETLINE variable '<' expr
189 { $$ = oper3(OGETLINE,$2,string("<",1),$4);
190 if (ops[$4].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
192 { $$ = oper3(OGETLINE,Nullop,string("|",1),$1);
193 if (ops[$1].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
194 | term 'p' GETLINE variable
195 { $$ = oper3(OGETLINE,$4,string("|",1),$1);
196 if (ops[$1].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
198 { $$ = oper0($1); need_entire = do_chop = TRUE; }
200 { $$ = oper1($1,Nullop); need_entire = do_chop = TRUE; }
202 { $$ = oper1($1,$3); }
203 | FUNN '(' expr_list ')'
204 { $$ = oper1($1,$3); }
205 | USERFUN '(' expr_list ')'
206 { $$ = oper2(OUSERFUN,$1,$3); }
208 { $$ = oper1(OSPRINTF,$2); }
209 | SUBSTR '(' expr ',' expr ',' expr ')'
210 { $$ = oper3(OSUBSTR,$3,$5,$7); }
211 | SUBSTR '(' expr ',' expr ')'
212 { $$ = oper2(OSUBSTR,$3,$5); }
213 | SPLIT '(' expr ',' VAR ',' expr ')'
214 { $$ = oper3(OSPLIT,$3,aryrefarg(numary($5)),$7); }
215 | SPLIT '(' expr ',' VAR ',' REGEX ')'
216 { $$ = oper3(OSPLIT,$3,aryrefarg(numary($5)),oper1(OREGEX,$7));}
217 | SPLIT '(' expr ',' VAR ')'
218 { $$ = oper2(OSPLIT,$3,aryrefarg(numary($5))); }
219 | INDEX '(' expr ',' expr ')'
220 { $$ = oper2(OINDEX,$3,$5); }
221 | MATCH '(' expr ',' REGEX ')'
222 { $$ = oper2(OMATCH,$3,oper1(OREGEX,$5)); }
223 | MATCH '(' expr ',' expr ')'
224 { $$ = oper2(OMATCH,$3,$5); }
225 | SUB '(' expr ',' expr ')'
226 { $$ = oper2(OSUB,$3,$5); }
227 | SUB '(' REGEX ',' expr ')'
228 { $$ = oper2(OSUB,oper1(OREGEX,$3),$5); }
229 | GSUB '(' expr ',' expr ')'
230 { $$ = oper2(OGSUB,$3,$5); }
231 | GSUB '(' REGEX ',' expr ')'
232 { $$ = oper2(OGSUB,oper1(OREGEX,$3),$5); }
233 | SUB '(' expr ',' expr ',' expr ')'
234 { $$ = oper3(OSUB,$3,$5,$7); }
235 | SUB '(' REGEX ',' expr ',' expr ')'
236 { $$ = oper3(OSUB,oper1(OREGEX,$3),$5,$7); }
237 | GSUB '(' expr ',' expr ',' expr ')'
238 { $$ = oper3(OGSUB,$3,$5,$7); }
239 | GSUB '(' REGEX ',' expr ',' expr ')'
240 { $$ = oper3(OGSUB,oper1(OREGEX,$3),$5,$7); }
244 { $$ = oper1(OVAR,$1); }
245 | VAR '[' expr_list ']'
246 { $$ = oper2(OVAR,aryrefarg($1),$3); }
248 { $$ = oper1(OFLD,$1); }
250 { $$ = oper1(OVFLD,$2); }
260 clist : expr ',' maybe expr
261 { $$ = oper3(OCOMMA,$1,$3,$4); }
262 | clist ',' maybe expr
263 { $$ = oper3(OCOMMA,$1,$3,$4); }
264 | '(' clist ')' /* these parens are invisible */
269 { $$ = oper2(OJUNK,$1,$2); }
275 { $$ = oper2(OJUNK,oper0(OSEMICOLON),oper0(ONEWLINE)); }
277 { $$ = oper2(OJUNK,oper0(OSEMICOLON),oper0(ONEWLINE)); }
279 { $$ = oper0(ONEWLINE); }
281 { $$ = oper1(OCOMMENT,$1); }
284 maybe : maybe nlstuff
285 { $$ = oper2(OJUNK,$1,$2); }
291 { $$ = oper0(ONEWLINE); }
293 { $$ = oper1(OCOMMENT,$1); }
298 { $$ = oper2(OJUNK,oper0(OSEMICOLON),$2); }
300 { $$ = oper2(OJUNK,oper0(OSNEWLINE),$2); }
302 { $$ = oper2(OJUNK,oper0(OSNEWLINE),$2); }
304 { $$ = oper2(OJUNK,oper1(OSCOMMENT,$1),$2); }
307 states : states statement
308 { $$ = oper2(OSTATES,$1,$2); }
314 : simple separator maybe
315 { $$ = oper2(OJUNK,oper2(OSTATE,$1,$2),$3); }
317 { $$ = oper2(OSTATE,Nullop,oper2(OJUNK,oper0(OSEMICOLON),$2)); }
319 { $$ = oper2(OSTATE,Nullop,oper2(OJUNK,oper0(OSNEWLINE),$2)); }
330 | PRINT expr_list redir expr
331 { $$ = oper3(OPRINT,$2,$3,$4);
333 saw_ORS = saw_OFS = TRUE;
334 if (!$2) need_entire = TRUE;
335 if (ops[$4].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
337 { $$ = oper1(OPRINT,$2);
338 if (!$2) need_entire = TRUE;
339 saw_ORS = saw_OFS = TRUE;
341 | PRINTF expr_list redir expr
342 { $$ = oper3(OPRINTF,$2,$3,$4);
344 if (!$2) need_entire = TRUE;
345 if (ops[$4].ival != OSTR + (1<<8)) do_fancy_opens = TRUE; }
347 { $$ = oper1(OPRINTF,$2);
348 if (!$2) need_entire = TRUE;
351 { $$ = oper0(OBREAK); }
353 { $$ = oper0(ONEXT); }
355 { $$ = oper0(OEXIT); }
357 { $$ = oper1(OEXIT,$2); }
359 { $$ = oper0(OCONTINUE); }
361 { $$ = oper0(ORETURN); }
363 { $$ = oper1(ORETURN,$2); }
364 | DELETE VAR '[' expr_list ']'
365 { $$ = oper2(ODELETE,aryrefarg($2),$4); }
368 redir : '>' %prec FIELD
369 { $$ = oper1(OREDIR,string(">",1)); }
371 { $$ = oper1(OREDIR,string(">>",2)); }
373 { $$ = oper1(OREDIR,string("|",1)); }
377 : IF '(' cond ')' maybe statement
378 { $$ = oper2(OIF,$3,bl($6,$5)); }
379 | IF '(' cond ')' maybe statement ELSE maybe statement
380 { $$ = oper3(OIF,$3,bl($6,$5),bl($9,$8)); }
381 | WHILE '(' cond ')' maybe statement
382 { $$ = oper2(OWHILE,$3,bl($6,$5)); }
383 | DO maybe statement WHILE '(' cond ')'
384 { $$ = oper2(ODO,bl($3,$2),$6); }
385 | FOR '(' simpnull ';' cond ';' simpnull ')' maybe statement
386 { $$ = oper4(OFOR,$3,$5,$7,bl($10,$9)); }
387 | FOR '(' simpnull ';' ';' simpnull ')' maybe statement
388 { $$ = oper4(OFOR,$3,string("",0),$6,bl($9,$8)); }
389 | FOR '(' expr ')' maybe statement
390 { $$ = oper2(OFORIN,$3,bl($6,$5)); }
391 | '{' maybe states '}' maybe
392 { $$ = oper3(OBLOCK,oper2(OJUNK,$2,$3),Nullop,$5); }
397 int yyparse _((void));