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prune dead code
[p5sagit/Function-Parameters.git] / Parameters.xs
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db81d362 1/*
2Copyright 2012 Lukas Mai.
3
4This program is free software; you can redistribute it and/or modify it
5under the terms of either: the GNU General Public License as published
6by the Free Software Foundation; or the Artistic License.
7
8See http://dev.perl.org/licenses/ for more information.
9 */
10
11#ifdef __GNUC__
12 #if (__GNUC__ == 4 && __GNUC_MINOR__ >= 6) || __GNUC__ >= 5
13 #define PRAGMA_GCC_(X) _Pragma(#X)
14 #define PRAGMA_GCC(X) PRAGMA_GCC_(GCC X)
15 #endif
16#endif
17
18#ifndef PRAGMA_GCC
19 #define PRAGMA_GCC(X)
20#endif
21
22#ifdef DEVEL
23 #define WARNINGS_RESET PRAGMA_GCC(diagnostic pop)
24 #define WARNINGS_ENABLEW(X) PRAGMA_GCC(diagnostic warning #X)
25 #define WARNINGS_ENABLE \
26 WARNINGS_ENABLEW(-Wall) \
27 WARNINGS_ENABLEW(-Wextra) \
28 WARNINGS_ENABLEW(-Wundef) \
c3e72f35 29 /* WARNINGS_ENABLEW(-Wshadow) :-( */ \
db81d362 30 WARNINGS_ENABLEW(-Wbad-function-cast) \
31 WARNINGS_ENABLEW(-Wcast-align) \
32 WARNINGS_ENABLEW(-Wwrite-strings) \
33 /* WARNINGS_ENABLEW(-Wnested-externs) wtf? */ \
34 WARNINGS_ENABLEW(-Wstrict-prototypes) \
35 WARNINGS_ENABLEW(-Wmissing-prototypes) \
36 WARNINGS_ENABLEW(-Winline) \
37 WARNINGS_ENABLEW(-Wdisabled-optimization)
38
39#else
40 #define WARNINGS_RESET
1bc47886 41 #define WARNINGS_ENABLE
db81d362 42#endif
43
44
7dd35535 45#define PERL_NO_GET_CONTEXT
db81d362 46#include "EXTERN.h"
47#include "perl.h"
48#include "XSUB.h"
49
50#include <string.h>
51
63915d26 52
db81d362 53WARNINGS_ENABLE
54
db81d362 55
7dd35535 56#define HAVE_PERL_VERSION(R, V, S) \
57 (PERL_REVISION > (R) || (PERL_REVISION == (R) && (PERL_VERSION > (V) || (PERL_VERSION == (V) && (PERL_SUBVERSION >= (S))))))
58
de013990 59#if HAVE_PERL_VERSION(5, 16, 0)
60 #define IF_HAVE_PERL_5_16(YES, NO) YES
61#else
62 #define IF_HAVE_PERL_5_16(YES, NO) NO
63#endif
64
e158cf8f 65#if 0
66 #if HAVE_PERL_VERSION(5, 17, 6)
67 #error "internal error: missing definition of KEY_my (your perl is too new)"
68 #elif HAVE_PERL_VERSION(5, 15, 8)
69 #define S_KEY_my 134
70 #elif HAVE_PERL_VERSION(5, 15, 6)
71 #define S_KEY_my 133
72 #elif HAVE_PERL_VERSION(5, 15, 5)
73 #define S_KEY_my 132
74 #elif HAVE_PERL_VERSION(5, 13, 0)
75 #define S_KEY_my 131
76 #else
77 #error "internal error: missing definition of KEY_my (your perl is too old)"
78 #endif
79#endif
80
63915d26 81
82#define MY_PKG "Function::Parameters"
83
84#define HINTK_KEYWORDS MY_PKG "/keywords"
85#define HINTK_FLAGS_ MY_PKG "/flags:"
86#define HINTK_SHIFT_ MY_PKG "/shift:"
87#define HINTK_ATTRS_ MY_PKG "/attrs:"
88
89#define DEFSTRUCT(T) typedef struct T T; struct T
90
0f875412 91#define UV_BITS (sizeof (UV) * CHAR_BIT)
92
63915d26 93enum {
94 FLAG_NAME_OK = 0x01,
95 FLAG_ANON_OK = 0x02,
96 FLAG_DEFAULT_ARGS = 0x04,
d8e5d540 97 FLAG_CHECK_NARGS = 0x08,
e158cf8f 98 FLAG_INVOCANT = 0x10,
99 FLAG_NAMED_PARAMS = 0x20
63915d26 100};
101
102DEFSTRUCT(KWSpec) {
103 unsigned flags;
b72eb6ee 104 SV *shift;
105 SV *attrs;
63915d26 106};
db81d362 107
108static int (*next_keyword_plugin)(pTHX_ char *, STRLEN, OP **);
109
63915d26 110static int kw_flags(pTHX_ const char *kw_ptr, STRLEN kw_len, KWSpec *spec) {
db81d362 111 HV *hints;
112 SV *sv, **psv;
113 const char *p, *kw_active;
114 STRLEN kw_active_len;
115
63915d26 116 spec->flags = 0;
b72eb6ee 117 spec->shift = sv_2mortal(newSVpvs(""));
118 spec->attrs = sv_2mortal(newSVpvs(""));
db81d362 119
120 if (!(hints = GvHV(PL_hintgv))) {
121 return FALSE;
122 }
123 if (!(psv = hv_fetchs(hints, HINTK_KEYWORDS, 0))) {
124 return FALSE;
125 }
126 sv = *psv;
127 kw_active = SvPV(sv, kw_active_len);
128 if (kw_active_len <= kw_len) {
129 return FALSE;
130 }
e88490f6 131 for (
132 p = kw_active;
133 (p = strchr(p, *kw_ptr)) &&
134 p < kw_active + kw_active_len - kw_len;
135 p++
136 ) {
db81d362 137 if (
138 (p == kw_active || p[-1] == ' ') &&
139 p[kw_len] == ' ' &&
140 memcmp(kw_ptr, p, kw_len) == 0
141 ) {
b72eb6ee 142
d970c3e7 143#define FETCH_HINTK_INTO(NAME, PTR, LEN, X) STMT_START { \
b72eb6ee 144 const char *fk_ptr_; \
145 STRLEN fk_len_; \
146 SV *fk_sv_; \
147 fk_sv_ = sv_2mortal(newSVpvs(HINTK_ ## NAME)); \
148 sv_catpvn(fk_sv_, PTR, LEN); \
149 fk_ptr_ = SvPV(fk_sv_, fk_len_); \
150 if (!((X) = hv_fetch(hints, fk_ptr_, fk_len_, 0))) { \
151 croak("%s: internal error: $^H{'%.*s'} not set", MY_PKG, (int)fk_len_, fk_ptr_); \
152 } \
d970c3e7 153} STMT_END
b72eb6ee 154
63915d26 155 FETCH_HINTK_INTO(FLAGS_, kw_ptr, kw_len, psv);
156 spec->flags = SvIV(*psv);
db81d362 157
b72eb6ee 158 FETCH_HINTK_INTO(SHIFT_, kw_ptr, kw_len, psv);
159 SvSetSV(spec->shift, *psv);
db81d362 160
b72eb6ee 161 FETCH_HINTK_INTO(ATTRS_, kw_ptr, kw_len, psv);
162 SvSetSV(spec->attrs, *psv);
163
164#undef FETCH_HINTK_INTO
db81d362 165 return TRUE;
166 }
167 }
168 return FALSE;
169}
170
171
311ced6f 172static void free_ptr_op(pTHX_ void *vp) {
c311cef3 173 OP **pp = vp;
174 op_free(*pp);
175 Safefree(pp);
176}
177
59016bfb 178#define sv_eq_pvs(SV, S) my_sv_eq_pvn(aTHX_ SV, "" S "", sizeof (S) - 1)
c311cef3 179
59016bfb 180static int my_sv_eq_pvn(pTHX_ SV *sv, const char *p, STRLEN n) {
c311cef3 181 STRLEN sv_len;
182 const char *sv_p = SvPV(sv, sv_len);
59016bfb 183 return memcmp(sv_p, p, n) == 0;
c311cef3 184}
185
186
187#include "padop_on_crack.c.inc"
188
189
c311cef3 190enum {
191 MY_ATTR_LVALUE = 0x01,
192 MY_ATTR_METHOD = 0x02,
193 MY_ATTR_SPECIAL = 0x04
194};
195
31534187 196static void my_sv_cat_c(pTHX_ SV *sv, U32 c) {
197 char ds[UTF8_MAXBYTES + 1], *d;
198 d = uvchr_to_utf8(ds, c);
199 if (d - ds > 1) {
200 sv_utf8_upgrade(sv);
201 }
202 sv_catpvn(sv, ds, d - ds);
203}
204
205static bool my_is_uni_xidfirst(pTHX_ UV c) {
206 U8 tmpbuf[UTF8_MAXBYTES + 1];
207 uvchr_to_utf8(tmpbuf, c);
208 return is_utf8_xidfirst(tmpbuf);
209}
210
211static bool my_is_uni_xidcont(pTHX_ UV c) {
212 U8 tmpbuf[UTF8_MAXBYTES + 1];
213 uvchr_to_utf8(tmpbuf, c);
214 return is_utf8_xidcont(tmpbuf);
215}
216
217static SV *my_scan_word(pTHX_ bool allow_package) {
218 bool at_start, at_substart;
219 I32 c;
220 SV *sv = sv_2mortal(newSVpvs(""));
221 if (lex_bufutf8()) {
222 SvUTF8_on(sv);
223 }
224
225 at_start = at_substart = TRUE;
226 c = lex_peek_unichar(0);
227
228 while (c != -1) {
229 if (at_substart ? my_is_uni_xidfirst(aTHX_ c) : my_is_uni_xidcont(aTHX_ c)) {
230 lex_read_unichar(0);
231 my_sv_cat_c(aTHX_ sv, c);
232 at_substart = FALSE;
233 c = lex_peek_unichar(0);
234 } else if (allow_package && !at_substart && c == '\'') {
235 lex_read_unichar(0);
236 c = lex_peek_unichar(0);
237 if (!my_is_uni_xidfirst(aTHX_ c)) {
238 lex_stuff_pvs("'", 0);
239 break;
240 }
241 sv_catpvs(sv, "'");
242 at_substart = TRUE;
243 } else if (allow_package && (at_start || !at_substart) && c == ':') {
244 lex_read_unichar(0);
245 if (lex_peek_unichar(0) != ':') {
246 lex_stuff_pvs(":", 0);
247 break;
248 }
249 lex_read_unichar(0);
250 c = lex_peek_unichar(0);
251 if (!my_is_uni_xidfirst(aTHX_ c)) {
252 lex_stuff_pvs("::", 0);
253 break;
254 }
255 sv_catpvs(sv, "::");
256 at_substart = TRUE;
257 } else {
258 break;
259 }
260 at_start = FALSE;
261 }
262
263 return SvCUR(sv) ? sv : NULL;
264}
265
266static SV *my_scan_parens_tail(pTHX_ bool keep_backslash) {
267 I32 c, nesting;
268 SV *sv;
269 line_t start;
270
271 start = CopLINE(PL_curcop);
272
273 sv = sv_2mortal(newSVpvs(""));
274 if (lex_bufutf8()) {
275 SvUTF8_on(sv);
276 }
277
278 nesting = 0;
279 for (;;) {
280 c = lex_read_unichar(0);
281 if (c == EOF) {
282 CopLINE_set(PL_curcop, start);
283 return NULL;
284 }
285
286 if (c == '\\') {
287 c = lex_read_unichar(0);
288 if (c == EOF) {
289 CopLINE_set(PL_curcop, start);
290 return NULL;
291 }
292 if (keep_backslash || (c != '(' && c != ')')) {
293 sv_catpvs(sv, "\\");
294 }
295 } else if (c == '(') {
296 nesting++;
297 } else if (c == ')') {
298 if (!nesting) {
299 break;
300 }
301 nesting--;
302 }
303
304 my_sv_cat_c(aTHX_ sv, c);
305 }
306
307 return sv;
308}
309
310static void my_check_prototype(pTHX_ const SV *declarator, SV *proto) {
311 char *start, *r, *w, *end;
312 STRLEN len;
313
314 /* strip spaces */
315 start = SvPV(proto, len);
316 end = start + len;
317
318 for (w = r = start; r < end; r++) {
319 if (!isSPACE(*r)) {
320 *w++ = *r;
321 }
322 }
323 *w = '\0';
324 SvCUR_set(proto, w - start);
325 end = w;
326 len = end - start;
327
328 if (!ckWARN(WARN_ILLEGALPROTO)) {
329 return;
330 }
331
332 /* check for bad characters */
333 if (strspn(start, "$@%*;[]&\\_+") != len) {
334 SV *dsv = newSVpvs_flags("", SVs_TEMP);
335 warner(
336 packWARN(WARN_ILLEGALPROTO),
337 "Illegal character in prototype for %"SVf" : %s",
338 SVfARG(declarator),
339 SvUTF8(proto)
340 ? sv_uni_display(
341 dsv,
342 proto,
343 len,
344 UNI_DISPLAY_ISPRINT
345 )
346 : pv_pretty(dsv, start, len, 60, NULL, NULL,
347 PERL_PV_ESCAPE_NONASCII
348 )
349 );
350 return;
351 }
352
353 for (r = start; r < end; r++) {
354 switch (*r) {
355 default:
356 warner(
357 packWARN(WARN_ILLEGALPROTO),
358 "Illegal character in prototype for %"SVf" : %s",
359 SVfARG(declarator), r
360 );
361 return;
362
363 case '_':
364 if (r[1] && !strchr(";@%", *r)) {
365 warner(
366 packWARN(WARN_ILLEGALPROTO),
367 "Illegal character after '_' in prototype for %"SVf" : %s",
368 SVfARG(declarator), r
369 );
370 return;
371 }
372 break;
373
374 case '@':
375 case '%':
376 if (r[1]) {
377 warner(
378 packWARN(WARN_ILLEGALPROTO),
379 "prototype after '%c' for %"SVf": %s",
380 *r, SVfARG(declarator), r + 1
381 );
382 return;
383 }
384 break;
385
386 case '\\':
387 r++;
388 if (strchr("$@%&*", *r)) {
389 break;
390 }
391 if (*r == '[') {
392 r++;
393 for (; r < end && *r != ']'; r++) {
394 if (!strchr("$@%&*", *r)) {
395 break;
396 }
397 }
398 if (*r == ']' && r[-1] != '[') {
399 break;
400 }
401 }
402 warner(
403 packWARN(WARN_ILLEGALPROTO),
404 "Illegal character after '\\' in prototype for %"SVf" : %s",
405 SVfARG(declarator), r
406 );
407 return;
408
409 case '$':
410 case '*':
411 case '&':
412 case ';':
413 case '+':
414 break;
415 }
416 }
417}
418
e158cf8f 419
420DEFSTRUCT(Param) {
421 SV *name;
422 PADOFFSET padoff;
423};
424
425DEFSTRUCT(ParamInit) {
426 Param param;
427 OP *init;
428};
429
430#define VEC(B) B ## _Vec
431
432#define DEFVECTOR(B) DEFSTRUCT(VEC(B)) { \
433 B (*data); \
434 size_t used, size; \
435}
436
437DEFVECTOR(Param);
438DEFVECTOR(ParamInit);
439
440#define DEFVECTOR_INIT(N, B) static void N(VEC(B) *p) { \
441 p->used = 0; \
442 p->size = 23; \
443 Newx(p->data, p->size, B); \
444} static void N(VEC(B) *)
445
446DEFSTRUCT(ParamSpec) {
447 Param invocant;
448 VEC(Param) positional_required;
449 VEC(ParamInit) positional_optional;
450 VEC(Param) named_required;
451 VEC(ParamInit) named_optional;
452 Param slurpy;
fc634bba 453 PADOFFSET rest_hash;
e158cf8f 454};
455
456DEFVECTOR_INIT(pv_init, Param);
457DEFVECTOR_INIT(piv_init, ParamInit);
458
459static void p_init(Param *p) {
460 p->name = NULL;
461 p->padoff = NOT_IN_PAD;
462}
463
464static void ps_init(ParamSpec *ps) {
465 p_init(&ps->invocant);
466 pv_init(&ps->positional_required);
467 piv_init(&ps->positional_optional);
468 pv_init(&ps->named_required);
469 piv_init(&ps->named_optional);
470 p_init(&ps->slurpy);
fc634bba 471 ps->rest_hash = NOT_IN_PAD;
e158cf8f 472}
473
474#define DEFVECTOR_EXTEND(N, B) static B (*N(VEC(B) *p)) { \
475 assert(p->used <= p->size); \
476 if (p->used == p->size) { \
477 const size_t n = p->size / 2 * 3 + 1; \
478 Renew(p->data, n, B); \
479 p->size = n; \
480 } \
481 return &p->data[p->used]; \
482} static B (*N(VEC(B) *))
483
484DEFVECTOR_EXTEND(pv_extend, Param);
485DEFVECTOR_EXTEND(piv_extend, ParamInit);
486
487#define DEFVECTOR_CLEAR(N, B, F) static void N(pTHX_ VEC(B) *p) { \
488 while (p->used) { \
489 p->used--; \
490 F(aTHX_ &p->data[p->used]); \
491 } \
492 Safefree(p->data); \
493 p->data = NULL; \
494 p->size = 0; \
495} static void N(pTHX_ VEC(B) *)
496
497static void p_clear(pTHX_ Param *p) {
498 p->name = NULL;
499 p->padoff = NOT_IN_PAD;
500}
501
502static void pi_clear(pTHX_ ParamInit *pi) {
503 p_clear(aTHX_ &pi->param);
504 if (pi->init) {
505 op_free(pi->init);
506 pi->init = NULL;
507 }
508}
509
510DEFVECTOR_CLEAR(pv_clear, Param, p_clear);
511DEFVECTOR_CLEAR(piv_clear, ParamInit, pi_clear);
512
513static void ps_clear(pTHX_ ParamSpec *ps) {
514 p_clear(aTHX_ &ps->invocant);
515
516 pv_clear(aTHX_ &ps->positional_required);
517 piv_clear(aTHX_ &ps->positional_optional);
518
519 pv_clear(aTHX_ &ps->named_required);
520 piv_clear(aTHX_ &ps->named_optional);
521
522 p_clear(aTHX_ &ps->slurpy);
523}
524
525static int ps_contains(pTHX_ const ParamSpec *ps, SV *sv) {
526 size_t i, lim;
527
528 if (ps->invocant.name && sv_eq(sv, ps->invocant.name)) {
529 return 1;
530 }
531
532 for (i = 0, lim = ps->positional_required.used; i < lim; i++) {
533 if (sv_eq(sv, ps->positional_required.data[i].name)) {
534 return 1;
535 }
536 }
537
538 for (i = 0, lim = ps->positional_optional.used; i < lim; i++) {
539 if (sv_eq(sv, ps->positional_optional.data[i].param.name)) {
540 return 1;
541 }
542 }
543
544 for (i = 0, lim = ps->named_required.used; i < lim; i++) {
545 if (sv_eq(sv, ps->named_required.data[i].name)) {
546 return 1;
547 }
548 }
549
550 for (i = 0, lim = ps->named_optional.used; i < lim; i++) {
551 if (sv_eq(sv, ps->named_optional.data[i].param.name)) {
552 return 1;
553 }
554 }
555
556 return 0;
557}
558
559static void ps_free_void(pTHX_ void *p) {
560 ps_clear(aTHX_ p);
561 Safefree(p);
562}
563
564static int args_min(pTHX_ const ParamSpec *ps, const KWSpec *ks) {
565 int n = 0;
566 if (!ps) {
567 return SvTRUE(ks->shift) ? 1 : 0;
568 }
569 if (ps->invocant.name) {
570 n++;
571 }
572 n += ps->positional_required.used;
573 n += ps->named_required.used * 2;
574 return n;
575}
576
577static int args_max(const ParamSpec *ps) {
578 int n = 0;
579 if (!ps) {
580 return -1;
581 }
582 if (ps->invocant.name) {
583 n++;
584 }
585 n += ps->positional_required.used;
586 n += ps->positional_optional.used;
587 if (ps->named_required.used || ps->named_optional.used || ps->slurpy.name) {
588 n = -1;
589 }
590 return n;
591}
592
593static size_t count_positional_params(const ParamSpec *ps) {
594 return ps->positional_required.used + ps->positional_optional.used;
595}
596
597static size_t count_named_params(const ParamSpec *ps) {
598 return ps->named_required.used + ps->named_optional.used;
599}
600
601enum {
602 PARAM_INVOCANT = 0x01,
603 PARAM_NAMED = 0x02
604};
605
606/* *pinit must be NULL on entry.
607 * caller must free *pinit on error.
608 */
609static PADOFFSET parse_param(
610 pTHX_
611 const SV *declarator, const KWSpec *spec, ParamSpec *param_spec,
612 int *pflags, SV **pname, OP **pinit
613) {
614 I32 c;
615 char sigil;
616 SV *name;
617
618 assert(!*pinit);
619 *pflags = 0;
620
621 c = lex_peek_unichar(0);
622
623 if (c == ':') {
624 lex_read_unichar(0);
625 lex_read_space(0);
626
627 *pflags |= PARAM_NAMED;
628
629 c = lex_peek_unichar(0);
630 }
631
632 if (c == -1) {
633 croak("In %"SVf": unterminated parameter list", SVfARG(declarator));
634 }
635 if (!(c == '$' || c == '@' || c == '%')) {
636 croak("In %"SVf": unexpected '%c' in parameter list (expecting a sigil)", SVfARG(declarator), (int)c);
637 }
638
639 sigil = c;
640
641 lex_read_unichar(0);
642 lex_read_space(0);
643
644 if (!(name = my_scan_word(aTHX_ FALSE))) {
645 croak("In %"SVf": missing identifier after '%c'", SVfARG(declarator), sigil);
646 }
647 sv_insert(name, 0, 0, &sigil, 1);
648 *pname = name;
649
650 lex_read_space(0);
651 c = lex_peek_unichar(0);
652
653 if (c == '=') {
654 lex_read_unichar(0);
655 lex_read_space(0);
656
657
658 if (!param_spec->invocant.name && SvTRUE(spec->shift)) {
659 param_spec->invocant.name = spec->shift;
660 param_spec->invocant.padoff = pad_add_name_sv(param_spec->invocant.name, 0, NULL, NULL);
661 }
662
663 *pinit = parse_termexpr(0);
664
665 lex_read_space(0);
666 c = lex_peek_unichar(0);
667 }
668
669 if (c == ':') {
670 *pflags |= PARAM_INVOCANT;
671 lex_read_unichar(0);
672 lex_read_space(0);
673 } else if (c == ',') {
674 lex_read_unichar(0);
675 lex_read_space(0);
676 } else if (c != ')') {
677 if (c == -1) {
678 croak("In %"SVf": unterminated parameter list", SVfARG(declarator));
679 }
680 croak("In %"SVf": unexpected '%c' in parameter list (expecting ',')", SVfARG(declarator), (int)c);
681 }
682
683 return pad_add_name_sv(*pname, IF_HAVE_PERL_5_16(padadd_NO_DUP_CHECK, 0), NULL, NULL);
684}
685
686static OP *my_var_g(pTHX_ I32 type, I32 flags, PADOFFSET padoff) {
687 OP *var = newOP(type, flags);
688 var->op_targ = padoff;
689 return var;
690}
691
692static OP *my_var(pTHX_ I32 flags, PADOFFSET padoff) {
693 return my_var_g(aTHX_ OP_PADSV, flags, padoff);
694}
695
fc634bba 696static OP *mkhvelem(pTHX_ PADOFFSET h, OP *k) {
697 OP *hv = my_var_g(aTHX_ OP_PADHV, OPf_REF, h);
698 return newBINOP(OP_HELEM, 0, hv, k);
699}
700
701static OP *mkconstsv(pTHX_ SV *sv) {
702 return newSVOP(OP_CONST, 0, sv);
703}
704
705static OP *mkconstiv(pTHX_ IV i) {
706 return mkconstsv(aTHX_ newSViv(i));
707}
708
709static OP *mkconstpv(pTHX_ const char *p, size_t n) {
710 return mkconstsv(aTHX_ newSVpv(p, n));
711}
712
713#define mkconstpvs(S) mkconstpv(aTHX_ "" S "", sizeof S - 1)
714
63915d26 715static int parse_fun(pTHX_ OP **pop, const char *keyword_ptr, STRLEN keyword_len, const KWSpec *spec) {
e158cf8f 716 ParamSpec *param_spec;
c311cef3 717 SV *declarator;
718 I32 floor_ix;
63915d26 719 int save_ix;
c311cef3 720 SV *saw_name;
1e0f1595 721 OP **prelude_sentinel;
c311cef3 722 SV *proto;
723 OP **attrs_sentinel, *body;
724 unsigned builtin_attrs;
db81d362 725 I32 c;
726
db81d362 727 declarator = sv_2mortal(newSVpvn(keyword_ptr, keyword_len));
db81d362 728
db81d362 729 lex_read_space(0);
730
c311cef3 731 builtin_attrs = 0;
732
db81d362 733 /* function name */
c311cef3 734 saw_name = NULL;
31534187 735 if ((spec->flags & FLAG_NAME_OK) && (saw_name = my_scan_word(aTHX_ TRUE))) {
c311cef3 736
737 if (PL_parser->expect != XSTATE) {
738 /* bail out early so we don't predeclare $saw_name */
739 croak("In %"SVf": I was expecting a function body, not \"%"SVf"\"", SVfARG(declarator), SVfARG(saw_name));
740 }
741
db81d362 742 sv_catpvs(declarator, " ");
c311cef3 743 sv_catsv(declarator, saw_name);
744
745 if (
746 sv_eq_pvs(saw_name, "BEGIN") ||
747 sv_eq_pvs(saw_name, "END") ||
748 sv_eq_pvs(saw_name, "INIT") ||
749 sv_eq_pvs(saw_name, "CHECK") ||
750 sv_eq_pvs(saw_name, "UNITCHECK")
751 ) {
752 builtin_attrs |= MY_ATTR_SPECIAL;
753 }
754
db81d362 755 lex_read_space(0);
63915d26 756 } else if (!(spec->flags & FLAG_ANON_OK)) {
31534187 757 croak("I was expecting a function name, not \"%.*s\"", (int)(PL_parser->bufend - PL_parser->bufptr), PL_parser->bufptr);
db81d362 758 } else {
759 sv_catpvs(declarator, " (anon)");
760 }
761
63915d26 762 /* we're a subroutine declaration */
c311cef3 763 floor_ix = start_subparse(FALSE, saw_name ? 0 : CVf_ANON);
764 SAVEFREESV(PL_compcv);
765
63915d26 766 /* create outer block: '{' */
767 save_ix = S_block_start(aTHX_ TRUE);
768
1e0f1595 769 /* initialize synthetic optree */
770 Newx(prelude_sentinel, 1, OP *);
771 *prelude_sentinel = NULL;
772 SAVEDESTRUCTOR_X(free_ptr_op, prelude_sentinel);
773
db81d362 774 /* parameters */
e158cf8f 775 param_spec = NULL;
63915d26 776
db81d362 777 c = lex_peek_unichar(0);
778 if (c == '(') {
e158cf8f 779 OP **init_sentinel;
780
781 Newx(init_sentinel, 1, OP *);
782 *init_sentinel = NULL;
783 SAVEDESTRUCTOR_X(free_ptr_op, init_sentinel);
784
785 Newx(param_spec, 1, ParamSpec);
786 ps_init(param_spec);
787 SAVEDESTRUCTOR_X(ps_free_void, param_spec);
db81d362 788
789 lex_read_unichar(0);
790 lex_read_space(0);
791
e158cf8f 792 while ((c = lex_peek_unichar(0)) != ')') {
793 int flags;
794 SV *name;
795 char sigil;
796 PADOFFSET padoff;
c311cef3 797
e158cf8f 798 padoff = parse_param(aTHX_ declarator, spec, param_spec, &flags, &name, init_sentinel);
c311cef3 799
e158cf8f 800 S_intro_my(aTHX);
63915d26 801
e158cf8f 802 sigil = SvPV_nolen(name)[0];
db81d362 803
e158cf8f 804 /* internal consistency */
805 if (flags & PARAM_NAMED) {
806 if (flags & PARAM_INVOCANT) {
807 croak("In %"SVf": invocant %"SVf" can't be a named parameter", SVfARG(declarator), SVfARG(name));
db81d362 808 }
e158cf8f 809 if (sigil != '$') {
810 croak("In %"SVf": named parameter %"SVf" can't be a%s", SVfARG(declarator), SVfARG(name), sigil == '@' ? "n array" : " hash");
db81d362 811 }
e158cf8f 812 } else if (flags & PARAM_INVOCANT) {
813 if (*init_sentinel) {
814 croak("In %"SVf": invocant %"SVf" can't have a default value", SVfARG(declarator), SVfARG(name));
db81d362 815 }
e158cf8f 816 if (sigil != '$') {
817 croak("In %"SVf": invocant %"SVf" can't be a%s", SVfARG(declarator), SVfARG(name), sigil == '@' ? "n array" : " hash");
818 }
819 } else if (sigil != '$' && *init_sentinel) {
820 croak("In %"SVf": %s %"SVf" can't have a default value", SVfARG(declarator), sigil == '@' ? "array" : "hash", SVfARG(name));
821 }
db81d362 822
e158cf8f 823 /* external constraints */
824 if (param_spec->slurpy.name) {
825 croak("In %"SVf": I was expecting \")\" after \"%"SVf"\", not \"%"SVf"\"", SVfARG(declarator), SVfARG(param_spec->slurpy.name), SVfARG(name));
826 }
827 if (sigil != '$') {
828 assert(!*init_sentinel);
829 param_spec->slurpy.name = name;
830 param_spec->slurpy.padoff = padoff;
831 continue;
832 }
d8e5d540 833
e158cf8f 834 if (!(flags & PARAM_NAMED) && count_named_params(param_spec)) {
835 croak("In %"SVf": positional parameter %"SVf" can't appear after named parameter %"SVf"", SVfARG(declarator), SVfARG(name), SVfARG((param_spec->named_required.used ? param_spec->named_required.data[0] : param_spec->named_optional.data[0].param).name));
836 }
d8e5d540 837
e158cf8f 838 if (flags & PARAM_INVOCANT) {
839 if (param_spec->invocant.name) {
840 croak("In %"SVf": invalid double invocants %"SVf", %"SVf"", SVfARG(declarator), SVfARG(param_spec->invocant.name), SVfARG(name));
841 }
842 if (count_positional_params(param_spec) || count_named_params(param_spec)) {
843 croak("In %"SVf": invocant %"SVf" must be first in parameter list", SVfARG(declarator), SVfARG(name));
63915d26 844 }
e158cf8f 845 if (!(spec->flags & FLAG_INVOCANT)) {
846 croak("In %"SVf": invocant %"SVf" not allowed here", SVfARG(declarator), SVfARG(name));
847 }
848 param_spec->invocant.name = name;
849 param_spec->invocant.padoff = padoff;
850 continue;
851 }
63915d26 852
e158cf8f 853 if (*init_sentinel && !(spec->flags & FLAG_DEFAULT_ARGS)) {
854 croak("In %"SVf": default argument for %"SVf" not allowed here", SVfARG(declarator), SVfARG(name));
855 }
1e0f1595 856
e158cf8f 857 if (ps_contains(aTHX_ param_spec, name)) {
858 croak("In %"SVf": %"SVf" can't appear twice in the same parameter list", SVfARG(declarator), SVfARG(name));
859 }
1e0f1595 860
e158cf8f 861 if (flags & PARAM_NAMED) {
862 if (!(spec->flags & FLAG_NAMED_PARAMS)) {
863 croak("In %"SVf": named parameter :%"SVf" not allowed here", SVfARG(declarator), SVfARG(name));
1e0f1595 864 }
865
e158cf8f 866 if (*init_sentinel) {
867 ParamInit *pi = piv_extend(&param_spec->named_optional);
868 pi->param.name = name;
869 pi->param.padoff = padoff;
870 pi->init = *init_sentinel;
871 *init_sentinel = NULL;
872 param_spec->named_optional.used++;
873 } else {
874 if (param_spec->positional_optional.used) {
875 croak("In %"SVf": can't combine optional positional (%"SVf") and required named (%"SVf") parameters", SVfARG(declarator), SVfARG(param_spec->positional_optional.data[0].param.name), SVfARG(name));
876 }
d8e5d540 877
e158cf8f 878 Param *p = pv_extend(&param_spec->named_required);
879 p->name = name;
880 p->padoff = padoff;
881 param_spec->named_required.used++;
882 }
883 } else {
884 if (*init_sentinel || param_spec->positional_optional.used) {
885 ParamInit *pi = piv_extend(&param_spec->positional_optional);
886 pi->param.name = name;
887 pi->param.padoff = padoff;
888 pi->init = *init_sentinel;
889 *init_sentinel = NULL;
890 param_spec->positional_optional.used++;
891 } else {
892 Param *p = pv_extend(&param_spec->positional_required);
893 p->name = name;
894 p->padoff = padoff;
895 param_spec->positional_required.used++;
db81d362 896 }
897 }
898
e158cf8f 899 }
900 lex_read_unichar(0);
901 lex_read_space(0);
902 *init_sentinel = NULL;
db81d362 903
e158cf8f 904 if (!param_spec->invocant.name && SvTRUE(spec->shift)) {
905 if (ps_contains(aTHX_ param_spec, spec->shift)) {
906 croak("In %"SVf": %"SVf" can't appear twice in the same parameter list", SVfARG(declarator), SVfARG(spec->shift));
db81d362 907 }
e158cf8f 908
909 param_spec->invocant.name = spec->shift;
910 param_spec->invocant.padoff = pad_add_name_sv(param_spec->invocant.name, 0, NULL, NULL);
db81d362 911 }
912 }
913
914 /* prototype */
c311cef3 915 proto = NULL;
db81d362 916 c = lex_peek_unichar(0);
917 if (c == ':') {
918 lex_read_unichar(0);
919 lex_read_space(0);
920
921 c = lex_peek_unichar(0);
922 if (c != '(') {
c311cef3 923 lex_stuff_pvs(":", 0);
924 c = ':';
db81d362 925 } else {
31534187 926 lex_read_unichar(0);
927 if (!(proto = my_scan_parens_tail(aTHX_ FALSE))) {
f34187b8 928 croak("In %"SVf": prototype not terminated", SVfARG(declarator));
db81d362 929 }
31534187 930 my_check_prototype(aTHX_ declarator, proto);
db81d362 931 lex_read_space(0);
c311cef3 932 c = lex_peek_unichar(0);
db81d362 933 }
934 }
935
db81d362 936 /* attributes */
c311cef3 937 Newx(attrs_sentinel, 1, OP *);
938 *attrs_sentinel = NULL;
311ced6f 939 SAVEDESTRUCTOR_X(free_ptr_op, attrs_sentinel);
c311cef3 940
63915d26 941 if (c == ':' || c == '{') /* '}' - hi, vim */ {
c311cef3 942
943 /* kludge default attributes in */
944 if (SvTRUE(spec->attrs) && SvPV_nolen(spec->attrs)[0] == ':') {
945 lex_stuff_sv(spec->attrs, 0);
946 c = ':';
947 }
b72eb6ee 948
db81d362 949 if (c == ':') {
db81d362 950 lex_read_unichar(0);
951 lex_read_space(0);
db81d362 952 c = lex_peek_unichar(0);
c311cef3 953
954 for (;;) {
955 SV *attr;
956
31534187 957 if (!(attr = my_scan_word(aTHX_ FALSE))) {
c311cef3 958 break;
db81d362 959 }
c311cef3 960
db81d362 961 lex_read_space(0);
962 c = lex_peek_unichar(0);
c311cef3 963
964 if (c != '(') {
965 if (sv_eq_pvs(attr, "lvalue")) {
966 builtin_attrs |= MY_ATTR_LVALUE;
967 attr = NULL;
968 } else if (sv_eq_pvs(attr, "method")) {
969 builtin_attrs |= MY_ATTR_METHOD;
970 attr = NULL;
971 }
972 } else {
31534187 973 SV *sv;
974 lex_read_unichar(0);
975 if (!(sv = my_scan_parens_tail(aTHX_ TRUE))) {
c311cef3 976 croak("In %"SVf": unterminated attribute parameter in attribute list", SVfARG(declarator));
977 }
31534187 978 sv_catpvs(attr, "(");
c311cef3 979 sv_catsv(attr, sv);
31534187 980 sv_catpvs(attr, ")");
c311cef3 981
982 lex_read_space(0);
983 c = lex_peek_unichar(0);
984 }
985
986 if (attr) {
fc634bba 987 *attrs_sentinel = op_append_elem(OP_LIST, *attrs_sentinel, mkconstsv(aTHX_ SvREFCNT_inc_simple_NN(attr)));
c311cef3 988 }
989
990 if (c == ':') {
991 lex_read_unichar(0);
992 lex_read_space(0);
993 c = lex_peek_unichar(0);
994 }
db81d362 995 }
996 }
997 }
998
999 /* body */
63915d26 1000 if (c != '{') /* '}' - hi, vim */ {
85bc3fbd 1001 croak("In %"SVf": I was expecting a function body, not \"%c\"", SVfARG(declarator), (int)c);
db81d362 1002 }
c311cef3 1003
63915d26 1004 /* surprise predeclaration! */
1005 if (saw_name) {
1006 /* 'sub NAME (PROTO);' to make name/proto known to perl before it
1007 starts parsing the body */
1008 const I32 sub_ix = start_subparse(FALSE, 0);
1009 SAVEFREESV(PL_compcv);
1010
1011 SvREFCNT_inc_simple_void(PL_compcv);
1012
1013 newATTRSUB(
1014 sub_ix,
fc634bba 1015 mkconstsv(aTHX_ SvREFCNT_inc_simple_NN(saw_name)),
1016 proto ? mkconstsv(aTHX_ SvREFCNT_inc_simple_NN(proto)) : NULL,
63915d26 1017 NULL,
1018 NULL
1019 );
1020 }
1021
c311cef3 1022 if (builtin_attrs & MY_ATTR_LVALUE) {
1023 CvLVALUE_on(PL_compcv);
db81d362 1024 }
c311cef3 1025 if (builtin_attrs & MY_ATTR_METHOD) {
1026 CvMETHOD_on(PL_compcv);
1027 }
1028 if (builtin_attrs & MY_ATTR_SPECIAL) {
1029 CvSPECIAL_on(PL_compcv);
db81d362 1030 }
1031
e158cf8f 1032 /* check number of arguments */
1033 if (spec->flags & FLAG_CHECK_NARGS) {
1034 int amin, amax;
1035 size_t named;
d8e5d540 1036
e158cf8f 1037 amin = args_min(aTHX_ param_spec, spec);
1038 if (amin > 0) {
1039 OP *chk, *cond, *err, *croak;
d8e5d540 1040
fc634bba 1041 err = mkconstsv(aTHX_ newSVpvf("Not enough arguments for %"SVf" (expected %d, got ", SVfARG(declarator), amin));
1042 err = newBINOP(
1043 OP_CONCAT, 0,
1044 err,
1045 newAVREF(newGVOP(OP_GV, 0, PL_defgv))
1046 );
1047 err = newBINOP(
1048 OP_CONCAT, 0,
1049 err,
1050 mkconstpvs(")")
1051 );
d8e5d540 1052
e158cf8f 1053 croak = newCVREF(OPf_WANT_SCALAR,
fc634bba 1054 newGVOP(OP_GV, 0, gv_fetchpvs("Carp::croak", 0, SVt_PVCV)));
e158cf8f 1055 err = newUNOP(OP_ENTERSUB, OPf_STACKED,
fc634bba 1056 op_append_elem(OP_LIST, err, croak));
d8e5d540 1057
e158cf8f 1058 cond = newBINOP(OP_LT, 0,
fc634bba 1059 newAVREF(newGVOP(OP_GV, 0, PL_defgv)),
1060 mkconstiv(aTHX_ amin));
e158cf8f 1061 chk = newLOGOP(OP_AND, 0, cond, err);
1062
1063 *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, newSTATEOP(0, NULL, chk));
1e0f1595 1064 }
abccbe86 1065
e158cf8f 1066 amax = args_max(param_spec);
1067 if (amax >= 0) {
1e0f1595 1068 OP *chk, *cond, *err, *croak;
63915d26 1069
fc634bba 1070 err = mkconstsv(aTHX_ newSVpvf("Too many arguments for %"SVf" (expected %d, got ", SVfARG(declarator), amax));
1071 err = newBINOP(
1072 OP_CONCAT, 0,
1073 err,
1074 newAVREF(newGVOP(OP_GV, 0, PL_defgv))
1075 );
1076 err = newBINOP(
1077 OP_CONCAT, 0,
1078 err,
1079 mkconstpvs(")")
1080 );
63915d26 1081
fc634bba 1082 croak = newCVREF(
1083 OPf_WANT_SCALAR,
1084 newGVOP(OP_GV, 0, gv_fetchpvs("Carp::croak", 0, SVt_PVCV))
1085 );
1e0f1595 1086 err = newUNOP(OP_ENTERSUB, OPf_STACKED,
fc634bba 1087 op_append_elem(OP_LIST, err, croak));
63915d26 1088
fc634bba 1089 cond = newBINOP(
1090 OP_GT, 0,
1091 newAVREF(newGVOP(OP_GV, 0, PL_defgv)),
1092 mkconstiv(aTHX_ amax)
1093 );
1e0f1595 1094 chk = newLOGOP(OP_AND, 0, cond, err);
63915d26 1095
1e0f1595 1096 *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, newSTATEOP(0, NULL, chk));
1097 }
e158cf8f 1098
1099 if (param_spec && (count_named_params(param_spec) || (param_spec->slurpy.name && SvPV_nolen(param_spec->slurpy.name)[0] == '%'))) {
1e0f1595 1100 OP *chk, *cond, *err, *croak;
e158cf8f 1101 const UV fixed = count_positional_params(param_spec) + !!param_spec->invocant.name;
63915d26 1102
fc634bba 1103 err = mkconstsv(aTHX_ newSVpvf("Odd number of paired arguments for %"SVf"", SVfARG(declarator)));
63915d26 1104
fc634bba 1105 croak = newCVREF(
1106 OPf_WANT_SCALAR,
1107 newGVOP(OP_GV, 0, gv_fetchpvs("Carp::croak", 0, SVt_PVCV))
1108 );
1e0f1595 1109 err = newUNOP(OP_ENTERSUB, OPf_STACKED,
fc634bba 1110 op_append_elem(OP_LIST, err, croak));
63915d26 1111
1e0f1595 1112 cond = newBINOP(OP_GT, 0,
fc634bba 1113 newAVREF(newGVOP(OP_GV, 0, PL_defgv)),
1114 mkconstiv(aTHX_ fixed));
e158cf8f 1115 cond = newLOGOP(OP_AND, 0,
fc634bba 1116 cond,
1117 newBINOP(OP_MODULO, 0,
1118 fixed
1119 ? newBINOP(OP_SUBTRACT, 0,
1120 newAVREF(newGVOP(OP_GV, 0, PL_defgv)),
1121 mkconstiv(aTHX_ fixed))
1122 : newAVREF(newGVOP(OP_GV, 0, PL_defgv)),
1123 mkconstiv(aTHX_ 2)));
1e0f1595 1124 chk = newLOGOP(OP_AND, 0, cond, err);
63915d26 1125
1e0f1595 1126 *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, newSTATEOP(0, NULL, chk));
c311cef3 1127 }
1e0f1595 1128 }
c311cef3 1129
e158cf8f 1130 if (!param_spec) {
1131 /* my $invocant = shift; */
1132 if (SvTRUE(spec->shift)) {
1133 OP *var;
abccbe86 1134
e158cf8f 1135 var = my_var(
1136 aTHX_
1137 OPf_MOD | (OPpLVAL_INTRO << 8),
1138 pad_add_name_sv(spec->shift, 0, NULL, NULL)
1139 );
1140 var = newASSIGNOP(OPf_STACKED, var, 0, newOP(OP_SHIFT, 0));
c311cef3 1141
e158cf8f 1142 *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, newSTATEOP(0, NULL, var));
1143 }
1144 } else {
1145 /* my $invocant = shift; */
1146 if (param_spec->invocant.name) {
1147 OP *var;
c311cef3 1148
e158cf8f 1149 var = my_var(
1150 aTHX_
1151 OPf_MOD | (OPpLVAL_INTRO << 8),
1152 param_spec->invocant.padoff
1153 );
1154 var = newASSIGNOP(OPf_STACKED, var, 0, newOP(OP_SHIFT, 0));
1e0f1595 1155
e158cf8f 1156 *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, newSTATEOP(0, NULL, var));
c311cef3 1157 }
1158
e158cf8f 1159 /* my (...) = @_; */
1160 {
1161 OP *lhs;
1162 size_t i, lim;
63915d26 1163
e158cf8f 1164 lhs = NULL;
63915d26 1165
e158cf8f 1166 for (i = 0, lim = param_spec->positional_required.used; i < lim; i++) {
1167 OP *const var = my_var(
1168 aTHX_
1169 OPf_WANT_LIST | (OPpLVAL_INTRO << 8),
1170 param_spec->positional_required.data[i].padoff
1171 );
1172 lhs = op_append_elem(OP_LIST, lhs, var);
1173 }
63915d26 1174
e158cf8f 1175 for (i = 0, lim = param_spec->positional_optional.used; i < lim; i++) {
1176 OP *const var = my_var(
1177 aTHX_
1178 OPf_WANT_LIST | (OPpLVAL_INTRO << 8),
1179 param_spec->positional_optional.data[i].param.padoff
1180 );
1181 lhs = op_append_elem(OP_LIST, lhs, var);
1182 }
63915d26 1183
fc634bba 1184 {
1185 PADOFFSET padoff;
1186 I32 type;
1187 bool slurpy_hash;
1188
1189 /*
1190 * cases:
1191 * 1) no named params
1192 * 1.1) slurpy
1193 * => put it in
1194 * 1.2) no slurpy
1195 * => nop
1196 * 2) named params
1197 * 2.1) no slurpy
1198 * => synthetic %{rest}
1199 * 2.2) slurpy is a hash
1200 * => put it in
1201 * 2.3) slurpy is an array
1202 * => synthetic %{rest}
1203 * remember to declare array later
1204 */
1205
1206 slurpy_hash = param_spec->slurpy.name && SvPV_nolen(param_spec->slurpy.name)[0] == '%';
1207 if (!count_named_params(param_spec)) {
1208 if (param_spec->slurpy.name) {
1209 padoff = param_spec->slurpy.padoff;
1210 type = slurpy_hash ? OP_PADHV : OP_PADAV;
1211 } else {
1212 padoff = NOT_IN_PAD;
1213 type = OP_PADSV;
1214 }
1215 } else if (slurpy_hash) {
1216 padoff = param_spec->slurpy.padoff;
1217 type = OP_PADHV;
e158cf8f 1218 } else {
fc634bba 1219 padoff = param_spec->rest_hash = pad_add_name_pvs("%{rest}", 0, NULL, NULL);
1220 type = OP_PADHV;
1221 }
1222
1223 if (padoff != NOT_IN_PAD) {
e158cf8f 1224 OP *const var = my_var_g(
1225 aTHX_
fc634bba 1226 type,
e158cf8f 1227 OPf_WANT_LIST | (OPpLVAL_INTRO << 8),
fc634bba 1228 padoff
e158cf8f 1229 );
fc634bba 1230
e158cf8f 1231 lhs = op_append_elem(OP_LIST, lhs, var);
fc634bba 1232
1233 if (type == OP_PADHV) {
1234 param_spec->rest_hash = padoff;
1235 }
e158cf8f 1236 }
1237 }
63915d26 1238
e158cf8f 1239 if (lhs) {
1240 OP *rhs;
1241 lhs->op_flags |= OPf_PARENS;
1242 rhs = newAVREF(newGVOP(OP_GV, 0, PL_defgv));
1243
1244 *prelude_sentinel = op_append_list(
1245 OP_LINESEQ, *prelude_sentinel,
1246 newSTATEOP(
1247 0, NULL,
1248 newASSIGNOP(OPf_STACKED, lhs, 0, rhs)
1249 )
1250 );
1251 }
1252 }
63915d26 1253
fc634bba 1254 /* default positional arguments */
e158cf8f 1255 {
1256 size_t i, lim, req;
1257 OP *nest;
63915d26 1258
e158cf8f 1259 nest = NULL;
63915d26 1260
e158cf8f 1261 req = param_spec->positional_required.used;
1262 for (i = 0, lim = param_spec->positional_optional.used; i < lim; i++) {
1263 ParamInit *cur = &param_spec->positional_optional.data[i];
1264 OP *var, *cond;
63915d26 1265
e158cf8f 1266 cond = newBINOP(
1267 OP_LT, 0,
1268 newAVREF(newGVOP(OP_GV, 0, PL_defgv)),
fc634bba 1269 mkconstiv(aTHX_ req + i + 1)
e158cf8f 1270 );
1e0f1595 1271
e158cf8f 1272 var = my_var(aTHX_ 0, cur->param.padoff);
1273
1274 nest = op_append_list(
1275 OP_LINESEQ, nest,
1276 newASSIGNOP(OPf_STACKED, var, 0, cur->init)
1277 );
1278 cur->init = NULL;
1279 nest = newCONDOP(
1280 0,
1281 cond,
1282 nest,
1283 NULL
1284 );
1285 }
1286
1287 *prelude_sentinel = op_append_list(
1288 OP_LINESEQ, *prelude_sentinel,
1289 nest
1290 );
c311cef3 1291 }
1292
e158cf8f 1293 /* named parameters */
1294 if (count_named_params(param_spec)) {
fc634bba 1295 size_t i, lim;
1296
1297 assert(param_spec->rest_hash != NOT_IN_PAD);
1298
1299 for (i = 0, lim = param_spec->named_required.used; i < lim; i++) {
1300 Param *cur = &param_spec->named_required.data[i];
1301 size_t n;
1302 char *p = SvPV(cur->name, n);
1303 OP *var, *cond;
1304
1305 cond = mkhvelem(aTHX_ param_spec->rest_hash, mkconstpv(aTHX_ p + 1, n - 1));
1306
1307 if (spec->flags & FLAG_CHECK_NARGS) {
1308 OP *croak, *msg;
1309
1310 var = mkhvelem(aTHX_ param_spec->rest_hash, mkconstpv(aTHX_ p + 1, n - 1));
1311 var = newUNOP(OP_DELETE, 0, var);
1312
1313 msg = mkconstsv(aTHX_ newSVpvf("In %"SVf": missing named parameter: %.*s", SVfARG(declarator), (int)(n - 1), p + 1));
1314 croak = newCVREF(
1315 OPf_WANT_SCALAR,
1316 newGVOP(OP_GV, 0, gv_fetchpvs("Carp::croak", 0, SVt_PVCV))
1317 );
1318 croak = newUNOP(OP_ENTERSUB, OPf_STACKED, op_append_elem(OP_LIST, msg, croak));
1319
1320 cond = newUNOP(OP_EXISTS, 0, cond);
1321
1322 cond = newCONDOP(0, cond, var, croak);
1323 }
1324
1325 var = my_var(
1326 aTHX_
1327 OPf_MOD | (OPpLVAL_INTRO << 8),
1328 cur->padoff
1329 );
1330 var = newASSIGNOP(OPf_STACKED, var, 0, cond);
1331
1332 *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, newSTATEOP(0, NULL, var));
1333 }
1334
1335 for (i = 0, lim = param_spec->named_optional.used; i < lim; i++) {
1336 ParamInit *cur = &param_spec->named_optional.data[i];
1337 size_t n;
1338 char *p = SvPV(cur->param.name, n);
1339 OP *var, *cond;
1340
1341 var = mkhvelem(aTHX_ param_spec->rest_hash, mkconstpv(aTHX_ p + 1, n - 1));
1342 var = newUNOP(OP_DELETE, 0, var);
1343
1344 cond = mkhvelem(aTHX_ param_spec->rest_hash, mkconstpv(aTHX_ p + 1, n - 1));
1345 cond = newUNOP(OP_EXISTS, 0, cond);
1346
1347 cond = newCONDOP(0, cond, var, cur->init);
1348 cur->init = NULL;
1349
1350 var = my_var(
1351 aTHX_
1352 OPf_MOD | (OPpLVAL_INTRO << 8),
1353 cur->param.padoff
1354 );
1355 var = newASSIGNOP(OPf_STACKED, var, 0, cond);
1356
1357 *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, newSTATEOP(0, NULL, var));
1358 }
1359
1360 if (!param_spec->slurpy.name) {
1361 if (spec->flags & FLAG_CHECK_NARGS) {
1362 /* croak if %{rest} */
1363 OP *croak, *cond, *keys, *msg;
1364
1365 keys = newUNOP(OP_KEYS, 0, my_var_g(aTHX_ OP_PADHV, 0, param_spec->rest_hash));
1366 keys = newLISTOP(OP_SORT, 0, newOP(OP_PUSHMARK, 0), keys);
1367 {
1368 OP *first, *mid, *last;
1369
1370 last = keys;
1371
1372 mid = mkconstpvs(", ");
1373 mid->op_sibling = last;
1374
1375 first = newOP(OP_PUSHMARK, 0);
1376
1377 keys = newLISTOP(OP_JOIN, 0, first, mid);
1378 keys->op_targ = pad_alloc(OP_JOIN, SVs_PADTMP);
1379 ((LISTOP *)keys)->op_last = last;
1380 }
1381
1382 msg = mkconstsv(aTHX_ newSVpvf("In %"SVf": no such named parameter: ", SVfARG(declarator)));
1383 msg = newBINOP(OP_CONCAT, 0, msg, keys);
1384
1385 croak = newCVREF(
1386 OPf_WANT_SCALAR,
1387 newGVOP(OP_GV, 0, gv_fetchpvs("Carp::croak", 0, SVt_PVCV))
1388 );
1389 croak = newUNOP(OP_ENTERSUB, OPf_STACKED, op_append_elem(OP_LIST, msg, croak));
1390
1391 cond = newUNOP(OP_KEYS, 0, my_var_g(aTHX_ OP_PADHV, 0, param_spec->rest_hash));
1392 croak = newCONDOP(0, cond, croak, NULL);
1393
1394 *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, newSTATEOP(0, NULL, croak));
1395 } else {
1396 OP *clear;
1397
1398 clear = newASSIGNOP(
1399 OPf_STACKED,
1400 my_var_g(aTHX_ OP_PADHV, 0, param_spec->rest_hash),
1401 0,
1402 newNULLLIST()
1403 );
1404
1405 *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, newSTATEOP(0, NULL, clear));
1406 }
1407 } else if (param_spec->slurpy.padoff != param_spec->rest_hash) {
1408 OP *var, *clear;
1409
1410 assert(SvPV_nolen(param_spec->slurpy.name)[0] == '@');
1411
1412 var = my_var_g(
1413 aTHX_
1414 OP_PADAV,
1415 OPf_MOD | (OPpLVAL_INTRO << 8),
1416 param_spec->slurpy.padoff
1417 );
1418
1419 var = newASSIGNOP(OPf_STACKED, var, 0, my_var_g(aTHX_ OP_PADHV, 0, param_spec->rest_hash));
1420
1421 *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, newSTATEOP(0, NULL, var));
1422
1423 clear = newASSIGNOP(
1424 OPf_STACKED,
1425 my_var_g(aTHX_ OP_PADHV, 0, param_spec->rest_hash),
1426 0,
1427 newNULLLIST()
1428 );
1429
1430 *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, newSTATEOP(0, NULL, clear));
1431 }
1432 }
1e0f1595 1433 }
c311cef3 1434
1e0f1595 1435 /* finally let perl parse the actual subroutine body */
1436 body = parse_block(0);
c311cef3 1437
1e0f1595 1438 /* add '();' to make function return nothing by default */
1439 /* (otherwise the invisible parameter initialization can "leak" into
1440 the return value: fun ($x) {}->("asdf", 0) == 2) */
1441 if (*prelude_sentinel) {
1442 body = newSTATEOP(0, NULL, body);
db81d362 1443 }
1444
1e0f1595 1445 body = op_append_list(OP_LINESEQ, *prelude_sentinel, body);
1446 *prelude_sentinel = NULL;
1447
c311cef3 1448 /* it's go time. */
1449 {
1450 OP *const attrs = *attrs_sentinel;
1451 *attrs_sentinel = NULL;
1452 SvREFCNT_inc_simple_void(PL_compcv);
1453
63915d26 1454 /* close outer block: '}' */
1455 S_block_end(aTHX_ save_ix, body);
1456
c311cef3 1457 if (!saw_name) {
1458 *pop = newANONATTRSUB(
1459 floor_ix,
1460 proto ? newSVOP(OP_CONST, 0, SvREFCNT_inc_simple_NN(proto)) : NULL,
1461 attrs,
1462 body
1463 );
1464 return KEYWORD_PLUGIN_EXPR;
1465 }
1466
1467 newATTRSUB(
1468 floor_ix,
1469 newSVOP(OP_CONST, 0, SvREFCNT_inc_simple_NN(saw_name)),
1470 proto ? newSVOP(OP_CONST, 0, SvREFCNT_inc_simple_NN(proto)) : NULL,
1471 attrs,
1472 body
1473 );
5efe0e0e 1474 *pop = newOP(OP_NULL, 0);
c311cef3 1475 return KEYWORD_PLUGIN_STMT;
db81d362 1476 }
db81d362 1477}
1478
1479static int my_keyword_plugin(pTHX_ char *keyword_ptr, STRLEN keyword_len, OP **op_ptr) {
63915d26 1480 KWSpec spec;
db81d362 1481 int ret;
1482
1483 SAVETMPS;
1484
7dd35535 1485 if (kw_flags(aTHX_ keyword_ptr, keyword_len, &spec)) {
1486 ret = parse_fun(aTHX_ op_ptr, keyword_ptr, keyword_len, &spec);
db81d362 1487 } else {
7dd35535 1488 ret = next_keyword_plugin(aTHX_ keyword_ptr, keyword_len, op_ptr);
db81d362 1489 }
1490
1491 FREETMPS;
1492
1493 return ret;
1494}
1495
1496WARNINGS_RESET
1497
1498MODULE = Function::Parameters PACKAGE = Function::Parameters
1499PROTOTYPES: ENABLE
1500
1501BOOT:
1502WARNINGS_ENABLE {
1503 HV *const stash = gv_stashpvs(MY_PKG, GV_ADD);
426a4d69 1504 /**/
d8e5d540 1505 newCONSTSUB(stash, "FLAG_NAME_OK", newSViv(FLAG_NAME_OK));
1506 newCONSTSUB(stash, "FLAG_ANON_OK", newSViv(FLAG_ANON_OK));
63915d26 1507 newCONSTSUB(stash, "FLAG_DEFAULT_ARGS", newSViv(FLAG_DEFAULT_ARGS));
d8e5d540 1508 newCONSTSUB(stash, "FLAG_CHECK_NARGS", newSViv(FLAG_CHECK_NARGS));
1509 newCONSTSUB(stash, "FLAG_INVOCANT", newSViv(FLAG_INVOCANT));
e158cf8f 1510 newCONSTSUB(stash, "FLAG_NAMED_PARAMS", newSViv(FLAG_NAMED_PARAMS));
db81d362 1511 newCONSTSUB(stash, "HINTK_KEYWORDS", newSVpvs(HINTK_KEYWORDS));
d8e5d540 1512 newCONSTSUB(stash, "HINTK_FLAGS_", newSVpvs(HINTK_FLAGS_));
1513 newCONSTSUB(stash, "HINTK_SHIFT_", newSVpvs(HINTK_SHIFT_));
1514 newCONSTSUB(stash, "HINTK_ATTRS_", newSVpvs(HINTK_ATTRS_));
426a4d69 1515 /**/
db81d362 1516 next_keyword_plugin = PL_keyword_plugin;
1517 PL_keyword_plugin = my_keyword_plugin;
1518} WARNINGS_RESET
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