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implement named params with temp hash
[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
696static SV *mkbits1(pTHX_ size_t n) {
697 size_t bytes = n / 8, bits = n % 8;
698 SV *sv = newSV(bytes + !!bits);
699 char *p = SvPVX(sv), *q = p;
700 while (bytes--) {
701 *p++ = '\xff';
702 }
703 if (bits) {
704 *p++ = (1u << bits) - 1;
705 }
706 *p = '\0';
707 SvCUR_set(sv, p - q);
708 SvPOK_on(sv);
709 return sv;
710}
711
712static OP *mkvecbits(pTHX_ PADOFFSET padoff, size_t i) {
713 OP *first, *mid, *last, *vec;
714
715 last = newSVOP(OP_CONST, 0, newSViv(1));
716 first = last;
717
718 mid = newSVOP(OP_CONST, 0, newSViv(i));
719 mid->op_sibling = first;
720 first = mid;
721
722 mid = my_var(aTHX_ 0, padoff);
723 mid->op_sibling = first;
724
725 first = newOP(OP_PUSHMARK, 0);
726
727 vec = newLISTOP(OP_VEC, 0, first, mid);
728 vec->op_targ = pad_alloc(OP_VEC, SVs_PADTMP);
729 ((LISTOP *)vec)->op_last = last;
730 op_null(((LISTOP *)vec)->op_first);
731
732 return vec;
733}
734
735static OP *mkargselem(pTHX_ OP *index) {
736 OP *args = newAVREF(newGVOP(OP_GV, 0, PL_defgv));
737 args->op_flags |= OPf_REF;
738
739 return newBINOP(OP_AELEM, 0, args, index);
740}
741
742static OP *mkargselemv(pTHX_ PADOFFSET v) {
743 return mkargselem(aTHX_ my_var(aTHX_ 0, v));
744}
745
fc634bba 746static OP *mkhvelem(pTHX_ PADOFFSET h, OP *k) {
747 OP *hv = my_var_g(aTHX_ OP_PADHV, OPf_REF, h);
748 return newBINOP(OP_HELEM, 0, hv, k);
749}
750
751static OP *mkconstsv(pTHX_ SV *sv) {
752 return newSVOP(OP_CONST, 0, sv);
753}
754
755static OP *mkconstiv(pTHX_ IV i) {
756 return mkconstsv(aTHX_ newSViv(i));
757}
758
759static OP *mkconstpv(pTHX_ const char *p, size_t n) {
760 return mkconstsv(aTHX_ newSVpv(p, n));
761}
762
763#define mkconstpvs(S) mkconstpv(aTHX_ "" S "", sizeof S - 1)
764
63915d26 765static int parse_fun(pTHX_ OP **pop, const char *keyword_ptr, STRLEN keyword_len, const KWSpec *spec) {
e158cf8f 766 ParamSpec *param_spec;
c311cef3 767 SV *declarator;
768 I32 floor_ix;
63915d26 769 int save_ix;
c311cef3 770 SV *saw_name;
1e0f1595 771 OP **prelude_sentinel;
c311cef3 772 SV *proto;
773 OP **attrs_sentinel, *body;
774 unsigned builtin_attrs;
db81d362 775 I32 c;
776
db81d362 777 declarator = sv_2mortal(newSVpvn(keyword_ptr, keyword_len));
db81d362 778
db81d362 779 lex_read_space(0);
780
c311cef3 781 builtin_attrs = 0;
782
db81d362 783 /* function name */
c311cef3 784 saw_name = NULL;
31534187 785 if ((spec->flags & FLAG_NAME_OK) && (saw_name = my_scan_word(aTHX_ TRUE))) {
c311cef3 786
787 if (PL_parser->expect != XSTATE) {
788 /* bail out early so we don't predeclare $saw_name */
789 croak("In %"SVf": I was expecting a function body, not \"%"SVf"\"", SVfARG(declarator), SVfARG(saw_name));
790 }
791
db81d362 792 sv_catpvs(declarator, " ");
c311cef3 793 sv_catsv(declarator, saw_name);
794
795 if (
796 sv_eq_pvs(saw_name, "BEGIN") ||
797 sv_eq_pvs(saw_name, "END") ||
798 sv_eq_pvs(saw_name, "INIT") ||
799 sv_eq_pvs(saw_name, "CHECK") ||
800 sv_eq_pvs(saw_name, "UNITCHECK")
801 ) {
802 builtin_attrs |= MY_ATTR_SPECIAL;
803 }
804
db81d362 805 lex_read_space(0);
63915d26 806 } else if (!(spec->flags & FLAG_ANON_OK)) {
31534187 807 croak("I was expecting a function name, not \"%.*s\"", (int)(PL_parser->bufend - PL_parser->bufptr), PL_parser->bufptr);
db81d362 808 } else {
809 sv_catpvs(declarator, " (anon)");
810 }
811
63915d26 812 /* we're a subroutine declaration */
c311cef3 813 floor_ix = start_subparse(FALSE, saw_name ? 0 : CVf_ANON);
814 SAVEFREESV(PL_compcv);
815
63915d26 816 /* create outer block: '{' */
817 save_ix = S_block_start(aTHX_ TRUE);
818
1e0f1595 819 /* initialize synthetic optree */
820 Newx(prelude_sentinel, 1, OP *);
821 *prelude_sentinel = NULL;
822 SAVEDESTRUCTOR_X(free_ptr_op, prelude_sentinel);
823
db81d362 824 /* parameters */
e158cf8f 825 param_spec = NULL;
63915d26 826
db81d362 827 c = lex_peek_unichar(0);
828 if (c == '(') {
e158cf8f 829 OP **init_sentinel;
830
831 Newx(init_sentinel, 1, OP *);
832 *init_sentinel = NULL;
833 SAVEDESTRUCTOR_X(free_ptr_op, init_sentinel);
834
835 Newx(param_spec, 1, ParamSpec);
836 ps_init(param_spec);
837 SAVEDESTRUCTOR_X(ps_free_void, param_spec);
db81d362 838
839 lex_read_unichar(0);
840 lex_read_space(0);
841
e158cf8f 842 while ((c = lex_peek_unichar(0)) != ')') {
843 int flags;
844 SV *name;
845 char sigil;
846 PADOFFSET padoff;
c311cef3 847
e158cf8f 848 padoff = parse_param(aTHX_ declarator, spec, param_spec, &flags, &name, init_sentinel);
c311cef3 849
e158cf8f 850 S_intro_my(aTHX);
63915d26 851
e158cf8f 852 sigil = SvPV_nolen(name)[0];
db81d362 853
e158cf8f 854 /* internal consistency */
855 if (flags & PARAM_NAMED) {
856 if (flags & PARAM_INVOCANT) {
857 croak("In %"SVf": invocant %"SVf" can't be a named parameter", SVfARG(declarator), SVfARG(name));
db81d362 858 }
e158cf8f 859 if (sigil != '$') {
860 croak("In %"SVf": named parameter %"SVf" can't be a%s", SVfARG(declarator), SVfARG(name), sigil == '@' ? "n array" : " hash");
db81d362 861 }
e158cf8f 862 } else if (flags & PARAM_INVOCANT) {
863 if (*init_sentinel) {
864 croak("In %"SVf": invocant %"SVf" can't have a default value", SVfARG(declarator), SVfARG(name));
db81d362 865 }
e158cf8f 866 if (sigil != '$') {
867 croak("In %"SVf": invocant %"SVf" can't be a%s", SVfARG(declarator), SVfARG(name), sigil == '@' ? "n array" : " hash");
868 }
869 } else if (sigil != '$' && *init_sentinel) {
870 croak("In %"SVf": %s %"SVf" can't have a default value", SVfARG(declarator), sigil == '@' ? "array" : "hash", SVfARG(name));
871 }
db81d362 872
e158cf8f 873 /* external constraints */
874 if (param_spec->slurpy.name) {
875 croak("In %"SVf": I was expecting \")\" after \"%"SVf"\", not \"%"SVf"\"", SVfARG(declarator), SVfARG(param_spec->slurpy.name), SVfARG(name));
876 }
877 if (sigil != '$') {
878 assert(!*init_sentinel);
879 param_spec->slurpy.name = name;
880 param_spec->slurpy.padoff = padoff;
881 continue;
882 }
d8e5d540 883
e158cf8f 884 if (!(flags & PARAM_NAMED) && count_named_params(param_spec)) {
885 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));
886 }
d8e5d540 887
e158cf8f 888 if (flags & PARAM_INVOCANT) {
889 if (param_spec->invocant.name) {
890 croak("In %"SVf": invalid double invocants %"SVf", %"SVf"", SVfARG(declarator), SVfARG(param_spec->invocant.name), SVfARG(name));
891 }
892 if (count_positional_params(param_spec) || count_named_params(param_spec)) {
893 croak("In %"SVf": invocant %"SVf" must be first in parameter list", SVfARG(declarator), SVfARG(name));
63915d26 894 }
e158cf8f 895 if (!(spec->flags & FLAG_INVOCANT)) {
896 croak("In %"SVf": invocant %"SVf" not allowed here", SVfARG(declarator), SVfARG(name));
897 }
898 param_spec->invocant.name = name;
899 param_spec->invocant.padoff = padoff;
900 continue;
901 }
63915d26 902
e158cf8f 903 if (*init_sentinel && !(spec->flags & FLAG_DEFAULT_ARGS)) {
904 croak("In %"SVf": default argument for %"SVf" not allowed here", SVfARG(declarator), SVfARG(name));
905 }
1e0f1595 906
e158cf8f 907 if (ps_contains(aTHX_ param_spec, name)) {
908 croak("In %"SVf": %"SVf" can't appear twice in the same parameter list", SVfARG(declarator), SVfARG(name));
909 }
1e0f1595 910
e158cf8f 911 if (flags & PARAM_NAMED) {
912 if (!(spec->flags & FLAG_NAMED_PARAMS)) {
913 croak("In %"SVf": named parameter :%"SVf" not allowed here", SVfARG(declarator), SVfARG(name));
1e0f1595 914 }
915
e158cf8f 916 if (*init_sentinel) {
917 ParamInit *pi = piv_extend(&param_spec->named_optional);
918 pi->param.name = name;
919 pi->param.padoff = padoff;
920 pi->init = *init_sentinel;
921 *init_sentinel = NULL;
922 param_spec->named_optional.used++;
923 } else {
924 if (param_spec->positional_optional.used) {
925 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));
926 }
d8e5d540 927
e158cf8f 928 Param *p = pv_extend(&param_spec->named_required);
929 p->name = name;
930 p->padoff = padoff;
931 param_spec->named_required.used++;
932 }
933 } else {
934 if (*init_sentinel || param_spec->positional_optional.used) {
935 ParamInit *pi = piv_extend(&param_spec->positional_optional);
936 pi->param.name = name;
937 pi->param.padoff = padoff;
938 pi->init = *init_sentinel;
939 *init_sentinel = NULL;
940 param_spec->positional_optional.used++;
941 } else {
942 Param *p = pv_extend(&param_spec->positional_required);
943 p->name = name;
944 p->padoff = padoff;
945 param_spec->positional_required.used++;
db81d362 946 }
947 }
948
e158cf8f 949 }
950 lex_read_unichar(0);
951 lex_read_space(0);
952 *init_sentinel = NULL;
db81d362 953
e158cf8f 954 if (!param_spec->invocant.name && SvTRUE(spec->shift)) {
955 if (ps_contains(aTHX_ param_spec, spec->shift)) {
956 croak("In %"SVf": %"SVf" can't appear twice in the same parameter list", SVfARG(declarator), SVfARG(spec->shift));
db81d362 957 }
e158cf8f 958
959 param_spec->invocant.name = spec->shift;
960 param_spec->invocant.padoff = pad_add_name_sv(param_spec->invocant.name, 0, NULL, NULL);
db81d362 961 }
962 }
963
964 /* prototype */
c311cef3 965 proto = NULL;
db81d362 966 c = lex_peek_unichar(0);
967 if (c == ':') {
968 lex_read_unichar(0);
969 lex_read_space(0);
970
971 c = lex_peek_unichar(0);
972 if (c != '(') {
c311cef3 973 lex_stuff_pvs(":", 0);
974 c = ':';
db81d362 975 } else {
31534187 976 lex_read_unichar(0);
977 if (!(proto = my_scan_parens_tail(aTHX_ FALSE))) {
f34187b8 978 croak("In %"SVf": prototype not terminated", SVfARG(declarator));
db81d362 979 }
31534187 980 my_check_prototype(aTHX_ declarator, proto);
db81d362 981 lex_read_space(0);
c311cef3 982 c = lex_peek_unichar(0);
db81d362 983 }
984 }
985
db81d362 986 /* attributes */
c311cef3 987 Newx(attrs_sentinel, 1, OP *);
988 *attrs_sentinel = NULL;
311ced6f 989 SAVEDESTRUCTOR_X(free_ptr_op, attrs_sentinel);
c311cef3 990
63915d26 991 if (c == ':' || c == '{') /* '}' - hi, vim */ {
c311cef3 992
993 /* kludge default attributes in */
994 if (SvTRUE(spec->attrs) && SvPV_nolen(spec->attrs)[0] == ':') {
995 lex_stuff_sv(spec->attrs, 0);
996 c = ':';
997 }
b72eb6ee 998
db81d362 999 if (c == ':') {
db81d362 1000 lex_read_unichar(0);
1001 lex_read_space(0);
db81d362 1002 c = lex_peek_unichar(0);
c311cef3 1003
1004 for (;;) {
1005 SV *attr;
1006
31534187 1007 if (!(attr = my_scan_word(aTHX_ FALSE))) {
c311cef3 1008 break;
db81d362 1009 }
c311cef3 1010
db81d362 1011 lex_read_space(0);
1012 c = lex_peek_unichar(0);
c311cef3 1013
1014 if (c != '(') {
1015 if (sv_eq_pvs(attr, "lvalue")) {
1016 builtin_attrs |= MY_ATTR_LVALUE;
1017 attr = NULL;
1018 } else if (sv_eq_pvs(attr, "method")) {
1019 builtin_attrs |= MY_ATTR_METHOD;
1020 attr = NULL;
1021 }
1022 } else {
31534187 1023 SV *sv;
1024 lex_read_unichar(0);
1025 if (!(sv = my_scan_parens_tail(aTHX_ TRUE))) {
c311cef3 1026 croak("In %"SVf": unterminated attribute parameter in attribute list", SVfARG(declarator));
1027 }
31534187 1028 sv_catpvs(attr, "(");
c311cef3 1029 sv_catsv(attr, sv);
31534187 1030 sv_catpvs(attr, ")");
c311cef3 1031
1032 lex_read_space(0);
1033 c = lex_peek_unichar(0);
1034 }
1035
1036 if (attr) {
fc634bba 1037 *attrs_sentinel = op_append_elem(OP_LIST, *attrs_sentinel, mkconstsv(aTHX_ SvREFCNT_inc_simple_NN(attr)));
c311cef3 1038 }
1039
1040 if (c == ':') {
1041 lex_read_unichar(0);
1042 lex_read_space(0);
1043 c = lex_peek_unichar(0);
1044 }
db81d362 1045 }
1046 }
1047 }
1048
1049 /* body */
63915d26 1050 if (c != '{') /* '}' - hi, vim */ {
85bc3fbd 1051 croak("In %"SVf": I was expecting a function body, not \"%c\"", SVfARG(declarator), (int)c);
db81d362 1052 }
c311cef3 1053
63915d26 1054 /* surprise predeclaration! */
1055 if (saw_name) {
1056 /* 'sub NAME (PROTO);' to make name/proto known to perl before it
1057 starts parsing the body */
1058 const I32 sub_ix = start_subparse(FALSE, 0);
1059 SAVEFREESV(PL_compcv);
1060
1061 SvREFCNT_inc_simple_void(PL_compcv);
1062
1063 newATTRSUB(
1064 sub_ix,
fc634bba 1065 mkconstsv(aTHX_ SvREFCNT_inc_simple_NN(saw_name)),
1066 proto ? mkconstsv(aTHX_ SvREFCNT_inc_simple_NN(proto)) : NULL,
63915d26 1067 NULL,
1068 NULL
1069 );
1070 }
1071
c311cef3 1072 if (builtin_attrs & MY_ATTR_LVALUE) {
1073 CvLVALUE_on(PL_compcv);
db81d362 1074 }
c311cef3 1075 if (builtin_attrs & MY_ATTR_METHOD) {
1076 CvMETHOD_on(PL_compcv);
1077 }
1078 if (builtin_attrs & MY_ATTR_SPECIAL) {
1079 CvSPECIAL_on(PL_compcv);
db81d362 1080 }
1081
e158cf8f 1082 /* check number of arguments */
1083 if (spec->flags & FLAG_CHECK_NARGS) {
1084 int amin, amax;
1085 size_t named;
d8e5d540 1086
e158cf8f 1087 amin = args_min(aTHX_ param_spec, spec);
1088 if (amin > 0) {
1089 OP *chk, *cond, *err, *croak;
d8e5d540 1090
fc634bba 1091 err = mkconstsv(aTHX_ newSVpvf("Not enough arguments for %"SVf" (expected %d, got ", SVfARG(declarator), amin));
1092 err = newBINOP(
1093 OP_CONCAT, 0,
1094 err,
1095 newAVREF(newGVOP(OP_GV, 0, PL_defgv))
1096 );
1097 err = newBINOP(
1098 OP_CONCAT, 0,
1099 err,
1100 mkconstpvs(")")
1101 );
d8e5d540 1102
e158cf8f 1103 croak = newCVREF(OPf_WANT_SCALAR,
fc634bba 1104 newGVOP(OP_GV, 0, gv_fetchpvs("Carp::croak", 0, SVt_PVCV)));
e158cf8f 1105 err = newUNOP(OP_ENTERSUB, OPf_STACKED,
fc634bba 1106 op_append_elem(OP_LIST, err, croak));
d8e5d540 1107
e158cf8f 1108 cond = newBINOP(OP_LT, 0,
fc634bba 1109 newAVREF(newGVOP(OP_GV, 0, PL_defgv)),
1110 mkconstiv(aTHX_ amin));
e158cf8f 1111 chk = newLOGOP(OP_AND, 0, cond, err);
1112
1113 *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, newSTATEOP(0, NULL, chk));
1e0f1595 1114 }
abccbe86 1115
e158cf8f 1116 amax = args_max(param_spec);
1117 if (amax >= 0) {
1e0f1595 1118 OP *chk, *cond, *err, *croak;
63915d26 1119
fc634bba 1120 err = mkconstsv(aTHX_ newSVpvf("Too many arguments for %"SVf" (expected %d, got ", SVfARG(declarator), amax));
1121 err = newBINOP(
1122 OP_CONCAT, 0,
1123 err,
1124 newAVREF(newGVOP(OP_GV, 0, PL_defgv))
1125 );
1126 err = newBINOP(
1127 OP_CONCAT, 0,
1128 err,
1129 mkconstpvs(")")
1130 );
63915d26 1131
fc634bba 1132 croak = newCVREF(
1133 OPf_WANT_SCALAR,
1134 newGVOP(OP_GV, 0, gv_fetchpvs("Carp::croak", 0, SVt_PVCV))
1135 );
1e0f1595 1136 err = newUNOP(OP_ENTERSUB, OPf_STACKED,
fc634bba 1137 op_append_elem(OP_LIST, err, croak));
63915d26 1138
fc634bba 1139 cond = newBINOP(
1140 OP_GT, 0,
1141 newAVREF(newGVOP(OP_GV, 0, PL_defgv)),
1142 mkconstiv(aTHX_ amax)
1143 );
1e0f1595 1144 chk = newLOGOP(OP_AND, 0, cond, err);
63915d26 1145
1e0f1595 1146 *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, newSTATEOP(0, NULL, chk));
1147 }
e158cf8f 1148
1149 if (param_spec && (count_named_params(param_spec) || (param_spec->slurpy.name && SvPV_nolen(param_spec->slurpy.name)[0] == '%'))) {
1e0f1595 1150 OP *chk, *cond, *err, *croak;
e158cf8f 1151 const UV fixed = count_positional_params(param_spec) + !!param_spec->invocant.name;
63915d26 1152
fc634bba 1153 err = mkconstsv(aTHX_ newSVpvf("Odd number of paired arguments for %"SVf"", SVfARG(declarator)));
63915d26 1154
fc634bba 1155 croak = newCVREF(
1156 OPf_WANT_SCALAR,
1157 newGVOP(OP_GV, 0, gv_fetchpvs("Carp::croak", 0, SVt_PVCV))
1158 );
1e0f1595 1159 err = newUNOP(OP_ENTERSUB, OPf_STACKED,
fc634bba 1160 op_append_elem(OP_LIST, err, croak));
63915d26 1161
1e0f1595 1162 cond = newBINOP(OP_GT, 0,
fc634bba 1163 newAVREF(newGVOP(OP_GV, 0, PL_defgv)),
1164 mkconstiv(aTHX_ fixed));
e158cf8f 1165 cond = newLOGOP(OP_AND, 0,
fc634bba 1166 cond,
1167 newBINOP(OP_MODULO, 0,
1168 fixed
1169 ? newBINOP(OP_SUBTRACT, 0,
1170 newAVREF(newGVOP(OP_GV, 0, PL_defgv)),
1171 mkconstiv(aTHX_ fixed))
1172 : newAVREF(newGVOP(OP_GV, 0, PL_defgv)),
1173 mkconstiv(aTHX_ 2)));
1e0f1595 1174 chk = newLOGOP(OP_AND, 0, cond, err);
63915d26 1175
1e0f1595 1176 *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, newSTATEOP(0, NULL, chk));
c311cef3 1177 }
1e0f1595 1178 }
c311cef3 1179
e158cf8f 1180 if (!param_spec) {
1181 /* my $invocant = shift; */
1182 if (SvTRUE(spec->shift)) {
1183 OP *var;
abccbe86 1184
e158cf8f 1185 var = my_var(
1186 aTHX_
1187 OPf_MOD | (OPpLVAL_INTRO << 8),
1188 pad_add_name_sv(spec->shift, 0, NULL, NULL)
1189 );
1190 var = newASSIGNOP(OPf_STACKED, var, 0, newOP(OP_SHIFT, 0));
c311cef3 1191
e158cf8f 1192 *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, newSTATEOP(0, NULL, var));
1193 }
1194 } else {
1195 /* my $invocant = shift; */
1196 if (param_spec->invocant.name) {
1197 OP *var;
c311cef3 1198
e158cf8f 1199 var = my_var(
1200 aTHX_
1201 OPf_MOD | (OPpLVAL_INTRO << 8),
1202 param_spec->invocant.padoff
1203 );
1204 var = newASSIGNOP(OPf_STACKED, var, 0, newOP(OP_SHIFT, 0));
1e0f1595 1205
e158cf8f 1206 *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, newSTATEOP(0, NULL, var));
c311cef3 1207 }
1208
e158cf8f 1209 /* my (...) = @_; */
1210 {
1211 OP *lhs;
1212 size_t i, lim;
63915d26 1213
e158cf8f 1214 lhs = NULL;
63915d26 1215
e158cf8f 1216 for (i = 0, lim = param_spec->positional_required.used; i < lim; i++) {
1217 OP *const var = my_var(
1218 aTHX_
1219 OPf_WANT_LIST | (OPpLVAL_INTRO << 8),
1220 param_spec->positional_required.data[i].padoff
1221 );
1222 lhs = op_append_elem(OP_LIST, lhs, var);
1223 }
63915d26 1224
e158cf8f 1225 for (i = 0, lim = param_spec->positional_optional.used; i < lim; i++) {
1226 OP *const var = my_var(
1227 aTHX_
1228 OPf_WANT_LIST | (OPpLVAL_INTRO << 8),
1229 param_spec->positional_optional.data[i].param.padoff
1230 );
1231 lhs = op_append_elem(OP_LIST, lhs, var);
1232 }
63915d26 1233
fc634bba 1234 {
1235 PADOFFSET padoff;
1236 I32 type;
1237 bool slurpy_hash;
1238
1239 /*
1240 * cases:
1241 * 1) no named params
1242 * 1.1) slurpy
1243 * => put it in
1244 * 1.2) no slurpy
1245 * => nop
1246 * 2) named params
1247 * 2.1) no slurpy
1248 * => synthetic %{rest}
1249 * 2.2) slurpy is a hash
1250 * => put it in
1251 * 2.3) slurpy is an array
1252 * => synthetic %{rest}
1253 * remember to declare array later
1254 */
1255
1256 slurpy_hash = param_spec->slurpy.name && SvPV_nolen(param_spec->slurpy.name)[0] == '%';
1257 if (!count_named_params(param_spec)) {
1258 if (param_spec->slurpy.name) {
1259 padoff = param_spec->slurpy.padoff;
1260 type = slurpy_hash ? OP_PADHV : OP_PADAV;
1261 } else {
1262 padoff = NOT_IN_PAD;
1263 type = OP_PADSV;
1264 }
1265 } else if (slurpy_hash) {
1266 padoff = param_spec->slurpy.padoff;
1267 type = OP_PADHV;
e158cf8f 1268 } else {
fc634bba 1269 padoff = param_spec->rest_hash = pad_add_name_pvs("%{rest}", 0, NULL, NULL);
1270 type = OP_PADHV;
1271 }
1272
1273 if (padoff != NOT_IN_PAD) {
e158cf8f 1274 OP *const var = my_var_g(
1275 aTHX_
fc634bba 1276 type,
e158cf8f 1277 OPf_WANT_LIST | (OPpLVAL_INTRO << 8),
fc634bba 1278 padoff
e158cf8f 1279 );
fc634bba 1280
e158cf8f 1281 lhs = op_append_elem(OP_LIST, lhs, var);
fc634bba 1282
1283 if (type == OP_PADHV) {
1284 param_spec->rest_hash = padoff;
1285 }
e158cf8f 1286 }
1287 }
63915d26 1288
e158cf8f 1289 if (lhs) {
1290 OP *rhs;
1291 lhs->op_flags |= OPf_PARENS;
1292 rhs = newAVREF(newGVOP(OP_GV, 0, PL_defgv));
1293
1294 *prelude_sentinel = op_append_list(
1295 OP_LINESEQ, *prelude_sentinel,
1296 newSTATEOP(
1297 0, NULL,
1298 newASSIGNOP(OPf_STACKED, lhs, 0, rhs)
1299 )
1300 );
1301 }
1302 }
63915d26 1303
fc634bba 1304 /* default positional arguments */
e158cf8f 1305 {
1306 size_t i, lim, req;
1307 OP *nest;
63915d26 1308
e158cf8f 1309 nest = NULL;
63915d26 1310
e158cf8f 1311 req = param_spec->positional_required.used;
1312 for (i = 0, lim = param_spec->positional_optional.used; i < lim; i++) {
1313 ParamInit *cur = &param_spec->positional_optional.data[i];
1314 OP *var, *cond;
63915d26 1315
e158cf8f 1316 cond = newBINOP(
1317 OP_LT, 0,
1318 newAVREF(newGVOP(OP_GV, 0, PL_defgv)),
fc634bba 1319 mkconstiv(aTHX_ req + i + 1)
e158cf8f 1320 );
1e0f1595 1321
e158cf8f 1322 var = my_var(aTHX_ 0, cur->param.padoff);
1323
1324 nest = op_append_list(
1325 OP_LINESEQ, nest,
1326 newASSIGNOP(OPf_STACKED, var, 0, cur->init)
1327 );
1328 cur->init = NULL;
1329 nest = newCONDOP(
1330 0,
1331 cond,
1332 nest,
1333 NULL
1334 );
1335 }
1336
1337 *prelude_sentinel = op_append_list(
1338 OP_LINESEQ, *prelude_sentinel,
1339 nest
1340 );
c311cef3 1341 }
1342
e158cf8f 1343 /* named parameters */
1344 if (count_named_params(param_spec)) {
fc634bba 1345 size_t i, lim;
1346
1347 assert(param_spec->rest_hash != NOT_IN_PAD);
1348
1349 for (i = 0, lim = param_spec->named_required.used; i < lim; i++) {
1350 Param *cur = &param_spec->named_required.data[i];
1351 size_t n;
1352 char *p = SvPV(cur->name, n);
1353 OP *var, *cond;
1354
1355 cond = mkhvelem(aTHX_ param_spec->rest_hash, mkconstpv(aTHX_ p + 1, n - 1));
1356
1357 if (spec->flags & FLAG_CHECK_NARGS) {
1358 OP *croak, *msg;
1359
1360 var = mkhvelem(aTHX_ param_spec->rest_hash, mkconstpv(aTHX_ p + 1, n - 1));
1361 var = newUNOP(OP_DELETE, 0, var);
1362
1363 msg = mkconstsv(aTHX_ newSVpvf("In %"SVf": missing named parameter: %.*s", SVfARG(declarator), (int)(n - 1), p + 1));
1364 croak = newCVREF(
1365 OPf_WANT_SCALAR,
1366 newGVOP(OP_GV, 0, gv_fetchpvs("Carp::croak", 0, SVt_PVCV))
1367 );
1368 croak = newUNOP(OP_ENTERSUB, OPf_STACKED, op_append_elem(OP_LIST, msg, croak));
1369
1370 cond = newUNOP(OP_EXISTS, 0, cond);
1371
1372 cond = newCONDOP(0, cond, var, croak);
1373 }
1374
1375 var = my_var(
1376 aTHX_
1377 OPf_MOD | (OPpLVAL_INTRO << 8),
1378 cur->padoff
1379 );
1380 var = newASSIGNOP(OPf_STACKED, var, 0, cond);
1381
1382 *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, newSTATEOP(0, NULL, var));
1383 }
1384
1385 for (i = 0, lim = param_spec->named_optional.used; i < lim; i++) {
1386 ParamInit *cur = &param_spec->named_optional.data[i];
1387 size_t n;
1388 char *p = SvPV(cur->param.name, n);
1389 OP *var, *cond;
1390
1391 var = mkhvelem(aTHX_ param_spec->rest_hash, mkconstpv(aTHX_ p + 1, n - 1));
1392 var = newUNOP(OP_DELETE, 0, var);
1393
1394 cond = mkhvelem(aTHX_ param_spec->rest_hash, mkconstpv(aTHX_ p + 1, n - 1));
1395 cond = newUNOP(OP_EXISTS, 0, cond);
1396
1397 cond = newCONDOP(0, cond, var, cur->init);
1398 cur->init = NULL;
1399
1400 var = my_var(
1401 aTHX_
1402 OPf_MOD | (OPpLVAL_INTRO << 8),
1403 cur->param.padoff
1404 );
1405 var = newASSIGNOP(OPf_STACKED, var, 0, cond);
1406
1407 *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, newSTATEOP(0, NULL, var));
1408 }
1409
1410 if (!param_spec->slurpy.name) {
1411 if (spec->flags & FLAG_CHECK_NARGS) {
1412 /* croak if %{rest} */
1413 OP *croak, *cond, *keys, *msg;
1414
1415 keys = newUNOP(OP_KEYS, 0, my_var_g(aTHX_ OP_PADHV, 0, param_spec->rest_hash));
1416 keys = newLISTOP(OP_SORT, 0, newOP(OP_PUSHMARK, 0), keys);
1417 {
1418 OP *first, *mid, *last;
1419
1420 last = keys;
1421
1422 mid = mkconstpvs(", ");
1423 mid->op_sibling = last;
1424
1425 first = newOP(OP_PUSHMARK, 0);
1426
1427 keys = newLISTOP(OP_JOIN, 0, first, mid);
1428 keys->op_targ = pad_alloc(OP_JOIN, SVs_PADTMP);
1429 ((LISTOP *)keys)->op_last = last;
1430 }
1431
1432 msg = mkconstsv(aTHX_ newSVpvf("In %"SVf": no such named parameter: ", SVfARG(declarator)));
1433 msg = newBINOP(OP_CONCAT, 0, msg, keys);
1434
1435 croak = newCVREF(
1436 OPf_WANT_SCALAR,
1437 newGVOP(OP_GV, 0, gv_fetchpvs("Carp::croak", 0, SVt_PVCV))
1438 );
1439 croak = newUNOP(OP_ENTERSUB, OPf_STACKED, op_append_elem(OP_LIST, msg, croak));
1440
1441 cond = newUNOP(OP_KEYS, 0, my_var_g(aTHX_ OP_PADHV, 0, param_spec->rest_hash));
1442 croak = newCONDOP(0, cond, croak, NULL);
1443
1444 *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, newSTATEOP(0, NULL, croak));
1445 } else {
1446 OP *clear;
1447
1448 clear = newASSIGNOP(
1449 OPf_STACKED,
1450 my_var_g(aTHX_ OP_PADHV, 0, param_spec->rest_hash),
1451 0,
1452 newNULLLIST()
1453 );
1454
1455 *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, newSTATEOP(0, NULL, clear));
1456 }
1457 } else if (param_spec->slurpy.padoff != param_spec->rest_hash) {
1458 OP *var, *clear;
1459
1460 assert(SvPV_nolen(param_spec->slurpy.name)[0] == '@');
1461
1462 var = my_var_g(
1463 aTHX_
1464 OP_PADAV,
1465 OPf_MOD | (OPpLVAL_INTRO << 8),
1466 param_spec->slurpy.padoff
1467 );
1468
1469 var = newASSIGNOP(OPf_STACKED, var, 0, my_var_g(aTHX_ OP_PADHV, 0, param_spec->rest_hash));
1470
1471 *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, newSTATEOP(0, NULL, var));
1472
1473 clear = newASSIGNOP(
1474 OPf_STACKED,
1475 my_var_g(aTHX_ OP_PADHV, 0, param_spec->rest_hash),
1476 0,
1477 newNULLLIST()
1478 );
1479
1480 *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, newSTATEOP(0, NULL, clear));
1481 }
1482 }
1483
1484 if (count_named_params(param_spec) && 0) {
e158cf8f 1485 int nameblock_ix;
1486 OP *nameblock;
1487 PADOFFSET vb, vc, vi, vk;
0f875412 1488 int vb_is_str, vc_is_str;
c56c77b6 1489
1490 {
1491 OP *lhs;
1492 size_t i, lim;
1493
1494 lhs = NULL;
1495
1496 for (i = 0, lim = param_spec->named_required.used; i < lim; i++) {
1497 OP *const var = my_var(
1498 aTHX_
1499 OPf_MOD | OPf_WANT_LIST | (OPpLVAL_INTRO << 8),
1500 param_spec->named_required.data[i].padoff
1501 );
1502 lhs = op_append_elem(OP_LIST, lhs, var);
1503 }
1504
1505 for (i = 0, lim = param_spec->named_optional.used; i < lim; i++) {
1506 OP *const var = my_var(
1507 aTHX_
1508 OPf_MOD | OPf_WANT_LIST | (OPpLVAL_INTRO << 8),
1509 param_spec->named_optional.data[i].param.padoff
1510 );
1511 lhs = op_append_elem(OP_LIST, lhs, var);
1512 }
1513
1514 lhs->op_flags |= OPf_PARENS;
1515 *prelude_sentinel = op_append_list(
1516 OP_LINESEQ, *prelude_sentinel,
1517 lhs
1518 );
1519 }
e158cf8f 1520
1521 nameblock = NULL;
1522 nameblock_ix = S_block_start(aTHX_ TRUE);
1523
1524 {
1525 OP *decl, *var;
1526
1527 decl = NULL;
1528
0f875412 1529 vb_is_str = param_spec->named_required.used > UV_BITS;
e158cf8f 1530 if (!param_spec->named_required.used || !(spec->flags & FLAG_CHECK_NARGS)) {
1531 vb = 0;
1532 } else {
1533 var = newOP(OP_PADSV, OPf_MOD | (OPpLVAL_INTRO << 8));
1534 var->op_targ = vb = pad_add_name_pvs("$__B", 0, NULL, NULL);
0f875412 1535 var = newASSIGNOP(OPf_STACKED, var, 0, newSVOP(OP_CONST, 0, vb_is_str ? newSVpvs("") : newSVuv(0)));
e158cf8f 1536 decl = op_append_list(OP_LINESEQ, decl, newSTATEOP(0, NULL, var));
1537 }
1538
0f875412 1539 vc_is_str = param_spec->named_optional.used > UV_BITS;
e158cf8f 1540 if (!param_spec->named_optional.used) {
1541 vc = 0;
1542 } else {
1543 var = newOP(OP_PADSV, OPf_MOD | (OPpLVAL_INTRO << 8));
1544 var->op_targ = vc = pad_add_name_pvs("$__C", 0, NULL, NULL);
0f875412 1545 var = newASSIGNOP(OPf_STACKED, var, 0, newSVOP(OP_CONST, 0, vc_is_str ? newSVpvs("") : newSVuv(0)));
e158cf8f 1546 decl = op_append_list(OP_LINESEQ, decl, newSTATEOP(0, NULL, var));
1547 }
1548
1549 var = newOP(OP_PADSV, OPf_MOD | (OPpLVAL_INTRO << 8));
1550 var->op_targ = vk = pad_add_name_pvs("$__K", 0, NULL, NULL);
1551 decl = op_append_list(OP_LINESEQ, decl, newSTATEOP(0, NULL, var));
1552
1553 var = newOP(OP_PADSV, OPf_MOD | (OPpLVAL_INTRO << 8));
1554 var->op_targ = vi = pad_add_name_pvs("$__I", 0, NULL, NULL);
c56c77b6 1555 var = newASSIGNOP(OPf_STACKED, var, 0, newSVOP(OP_CONST, 0, newSViv(count_positional_params(param_spec))));
e158cf8f 1556 decl = op_append_list(OP_LINESEQ, decl, newSTATEOP(0, NULL, var));
1557
e158cf8f 1558 nameblock = op_append_list(OP_LINESEQ, nameblock, decl);
1559 }
1560
1561 {
1562 OP *loop;
1563
1564 loop = NULL;
1565
1566 loop = op_append_list(
1567 OP_LINESEQ,
1568 loop,
1569 newSTATEOP(
1570 0, NULL,
1571 newASSIGNOP(
1572 OPf_STACKED,
1573 my_var(aTHX_ 0, vk),
1574 0,
1575 mkargselemv(aTHX_ vi)
1576 )
1577 )
1578 );
1579
1580 {
1581 OP *nest;
1582 size_t i;
1583
1584 if (param_spec->slurpy.name) {
1585 if (SvPV_nolen(param_spec->slurpy.name)[0] == '@') {
1586 OP *first, *mid, *last;
1587
1588 last = mkargselem(
1589 aTHX_
1590 newBINOP(
1591 OP_ADD, 0,
1592 my_var(aTHX_ 0, vi),
1593 newSVOP(OP_CONST, 0, newSViv(1))
1594 )
1595 );
1596 mid = last;
1597
1598 first = my_var(aTHX_ 0, vk);
1599 first->op_sibling = mid;
1600 mid = first;
1601
1602 first = my_var_g(aTHX_ OP_PADAV, 0, param_spec->slurpy.padoff);
1603 first->op_sibling = mid;
1604 mid = first;
1605
1606 first = newOP(OP_PUSHMARK, 0);
1607 nest = newLISTOP(OP_PUSH, 0, first, mid);
1608 nest->op_targ = pad_alloc(OP_PUSH, SVs_PADTMP);
1609 ((LISTOP *)nest)->op_last = last;
1610 } else {
1611 nest = newASSIGNOP(
1612 OPf_STACKED,
1613 newBINOP(
1614 OP_HELEM, 0,
1615 my_var_g(aTHX_ OP_PADHV, 0, param_spec->slurpy.padoff),
1616 my_var(aTHX_ 0, vk)
1617 ),
1618 0,
1619 mkargselem(
1620 aTHX_
1621 newBINOP(
1622 OP_ADD, 0,
1623 my_var(aTHX_ 0, vi),
1624 newSVOP(OP_CONST, 0, newSViv(1))
1625 )
1626 )
1627 );
1628 }
1629 } else if (spec->flags & FLAG_CHECK_NARGS) {
1630 OP *err, *croak;
1631
1632 err = newSVOP(OP_CONST, 0,
0f875412 1633 newSVpvf("In %"SVf": no such named parameter: ", SVfARG(declarator)));
e158cf8f 1634 err = newBINOP(
1635 OP_CONCAT, 0,
1636 err,
1637 my_var(aTHX_ 0, vk)
1638 );
1639
1640 croak = newCVREF(OPf_WANT_SCALAR,
1641 newGVOP(OP_GV, 0, gv_fetchpvs("Carp::croak", 0, SVt_PVCV)));
1642 nest = newUNOP(OP_ENTERSUB, OPf_STACKED,
1643 op_append_elem(OP_LIST, err, croak));
1644 } else {
1645 nest = NULL;
1646 }
1647
1648 for (i = param_spec->named_optional.used; i--; ) {
1649 Param *cur = &param_spec->named_optional.data[i].param;
1650 size_t dn;
1651 char *dp = SvPV(cur->name, dn);
1652 OP *vec;
1653
1654 if (!(spec->flags & FLAG_CHECK_NARGS)) {
1655 vec = NULL;
0f875412 1656 } else if (vc_is_str) {
e158cf8f 1657 vec = newASSIGNOP(
1658 OPf_STACKED,
1659 mkvecbits(aTHX_ vc, i),
1660 0,
1661 newSVOP(OP_CONST, 0, newSViv(1))
1662 );
0f875412 1663 } else {
1664 vec = newASSIGNOP(
1665 OPf_STACKED,
f0c98476 1666 my_var(aTHX_ 0, vc),
0f875412 1667 OP_BIT_OR,
1668 newSVOP(OP_CONST, 0, newSVuv((UV)1 << i))
1669 );
e158cf8f 1670 }
1671
1672 nest = newCONDOP(
1673 0,
1674 newBINOP(
1675 OP_SEQ, 0,
1676 my_var(aTHX_ 0, vk),
1677 newSVOP(OP_CONST, 0, newSVpvn_utf8(dp + 1, dn - 1, SvUTF8(cur->name)))
1678 ),
1679 op_append_list(
1680 OP_LINESEQ,
1681 newASSIGNOP(
1682 OPf_STACKED,
1683 my_var(aTHX_ 0, cur->padoff),
1684 0,
1685 mkargselem(
1686 aTHX_
1687 newBINOP(
1688 OP_ADD, 0,
1689 my_var(aTHX_ 0, vi),
1690 newSVOP(OP_CONST, 0, newSViv(1))
1691 )
1692 )
1693 ),
1694 vec
1695 ),
1696 nest
1697 );
1698 }
1699
1700 for (i = param_spec->named_required.used; i--; ) {
1701 Param *cur = &param_spec->named_required.data[i];
1702 size_t dn;
1703 char *dp = SvPV(cur->name, dn);
1704 OP *vec;
1705
1706 if (!(spec->flags & FLAG_CHECK_NARGS)) {
1707 vec = NULL;
0f875412 1708 } else if (vb_is_str) {
e158cf8f 1709 vec = newASSIGNOP(
1710 OPf_STACKED,
1711 mkvecbits(aTHX_ vb, i),
1712 0,
1713 newSVOP(OP_CONST, 0, newSViv(1))
1714 );
0f875412 1715 } else {
1716 vec = newASSIGNOP(
1717 OPf_STACKED,
f0c98476 1718 my_var(aTHX_ 0, vb),
0f875412 1719 OP_BIT_OR,
1720 newSVOP(OP_CONST, 0, newSVuv((UV)1 << i))
1721 );
e158cf8f 1722 }
1723
1724 nest = newCONDOP(
1725 0,
1726 newBINOP(
1727 OP_SEQ, 0,
1728 my_var(aTHX_ 0, vk),
1729 newSVOP(OP_CONST, 0, newSVpvn_utf8(dp + 1, dn - 1, SvUTF8(cur->name)))
1730 ),
1731 op_append_list(
1732 OP_LINESEQ,
1733 newASSIGNOP(
1734 OPf_STACKED,
1735 my_var(aTHX_ 0, cur->padoff),
1736 0,
1737 mkargselem(
1738 aTHX_
1739 newBINOP(
1740 OP_ADD, 0,
1741 my_var(aTHX_ 0, vi),
1742 newSVOP(OP_CONST, 0, newSViv(1))
1743 )
1744 )
1745 ),
1746 vec
1747 ),
1748 nest
1749 );
1750 }
1751
1752 loop = op_append_elem(OP_LINESEQ, loop, newSTATEOP(0, NULL, nest));
1753 }
1754
1755 loop = newWHILEOP(
1756 0, 1,
1757 NULL,
1758 newBINOP(
1759 OP_LT, 0,
1760 my_var(aTHX_ 0, vi),
1761 newAVREF(newGVOP(OP_GV, 0, PL_defgv))
1762 ),
1763 loop,
1764 newASSIGNOP(
1765 OPf_STACKED,
1766 my_var(aTHX_ 0, vi),
1767 OP_ADD,
1768 newSVOP(OP_CONST, 0, newSViv(2))
1769 ),
1770 0
1771 );
1772
1773 nameblock = op_append_list(OP_LINESEQ, nameblock, newSTATEOP(0, NULL, loop));
1774 }
1775
1776 if (param_spec->named_required.used && (spec->flags & FLAG_CHECK_NARGS)) {
1777 OP *cond, *err, *croak, *join;
1778
1779 {
1780 size_t i, lim;
1781 OP *first, *mid, *last;
1782
1783 last = newNULLLIST();
1784 mid = last;
1785
1786 for (i = param_spec->named_required.used; i--; ) {
1787 OP *cur;
1788 SV *sv = param_spec->named_required.data[i].name;
1789 size_t n;
1790 char *p = SvPV(sv, n);
1791 cur = newCONDOP(
1792 0,
0f875412 1793 vb_is_str
1794 ? mkvecbits(aTHX_ vb, i)
f0c98476 1795 : newBINOP(OP_BIT_AND, 0, my_var(aTHX_ 0, vb), newSVOP(OP_CONST, 0, newSVuv((UV)1 << i)))
0f875412 1796 ,
e158cf8f 1797 newNULLLIST(),
1798 newSVOP(OP_CONST, 0, newSVpvn_utf8(p + 1, n - 1, SvUTF8(sv)))
1799 );
1800 cur->op_sibling = mid;
1801 mid = cur;
1802 }
1803
1804 first = newSVOP(OP_CONST, 0, newSVpvs(", "));
1805 first->op_sibling = mid;
1806 mid = first;
1807
1808 first = newOP(OP_PUSHMARK, 0);
1809
1810 join = newLISTOP(OP_JOIN, 0, first, mid);
1811 join->op_targ = pad_alloc(OP_JOIN, SVs_PADTMP);
1812 ((LISTOP *)join)->op_last = last;
1813 }
1814
1815 err = newSVOP(
1816 OP_CONST, 0,
0f875412 1817 newSVpvf("In %"SVf": missing named parameter(s): ", SVfARG(declarator))
e158cf8f 1818 );
1819 err = newBINOP(OP_CONCAT, 0, err, join);
1820 croak = newCVREF(
1821 OPf_WANT_SCALAR,
1822 newGVOP(OP_GV, 0, gv_fetchpvs("Carp::croak", 0, SVt_PVCV))
1823 );
1824 err = newUNOP(
1825 OP_ENTERSUB,
1826 OPf_STACKED,
1827 op_append_elem(OP_LIST, err, croak)
1828 );
0f875412 1829 if (vb_is_str) {
1830 cond = newBINOP(
1831 OP_SNE, 0,
1832 my_var(aTHX_ 0, vb),
1833 newSVOP(OP_CONST, 0, mkbits1(aTHX_ param_spec->named_required.used))
1834 );
1835 } else {
1836 cond = newBINOP(
1837 OP_NE, 0,
1838 my_var(aTHX_ 0, vb),
1839 newSVOP(
1840 OP_CONST, 0,
1841 newSVuv(
1842 param_spec->named_required.used == UV_BITS
1843 ? ~(UV)0
1844 : ((UV)1 << param_spec->named_required.used) - 1
1845 )
1846 )
1847 );
1848 }
e158cf8f 1849 err = newCONDOP(
1850 0,
1851 cond,
1852 err,
1853 NULL
1854 );
1855
1856 nameblock = op_append_list(OP_LINESEQ, nameblock, err);
1857 }
1858
1859 if (param_spec->named_optional.used) {
1860 size_t i, lim;
1861
1862 for (i = 0, lim = param_spec->named_optional.used; i < lim; i++) {
1863 ParamInit *const cur = &param_spec->named_optional.data[i];
1864 OP *init, *cond;
1865
1866 init = newASSIGNOP(
1867 OPf_STACKED,
1868 my_var(aTHX_ 0, cur->param.padoff),
1869 0,
1870 cur->init
1871 );
1872 cur->init = NULL;
1873
fc634bba 1874 cond = vc_is_str
0f875412 1875 ? mkvecbits(aTHX_ vc, i)
f0c98476 1876 : newBINOP(OP_BIT_AND, 0, my_var(aTHX_ 0, vc), newSVOP(OP_CONST, 0, newSVuv((UV)1 << i)))
fc634bba 1877 ;
e158cf8f 1878
fc634bba 1879 init = newCONDOP(0, cond, NULL, init);
e158cf8f 1880
1881 nameblock = op_append_list(OP_LINESEQ, nameblock, newSTATEOP(0, NULL, init));
1882 }
1883 }
1884
1885 nameblock = S_block_end(aTHX_ nameblock_ix, nameblock);
1886 nameblock = op_scope(nameblock);
1887
1888 *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, nameblock);
1889 }
1e0f1595 1890 }
c311cef3 1891
1e0f1595 1892 /* finally let perl parse the actual subroutine body */
1893 body = parse_block(0);
c311cef3 1894
1e0f1595 1895 /* add '();' to make function return nothing by default */
1896 /* (otherwise the invisible parameter initialization can "leak" into
1897 the return value: fun ($x) {}->("asdf", 0) == 2) */
1898 if (*prelude_sentinel) {
1899 body = newSTATEOP(0, NULL, body);
db81d362 1900 }
1901
1e0f1595 1902 body = op_append_list(OP_LINESEQ, *prelude_sentinel, body);
1903 *prelude_sentinel = NULL;
1904
c311cef3 1905 /* it's go time. */
1906 {
1907 OP *const attrs = *attrs_sentinel;
1908 *attrs_sentinel = NULL;
1909 SvREFCNT_inc_simple_void(PL_compcv);
1910
63915d26 1911 /* close outer block: '}' */
1912 S_block_end(aTHX_ save_ix, body);
1913
c311cef3 1914 if (!saw_name) {
1915 *pop = newANONATTRSUB(
1916 floor_ix,
1917 proto ? newSVOP(OP_CONST, 0, SvREFCNT_inc_simple_NN(proto)) : NULL,
1918 attrs,
1919 body
1920 );
1921 return KEYWORD_PLUGIN_EXPR;
1922 }
1923
1924 newATTRSUB(
1925 floor_ix,
1926 newSVOP(OP_CONST, 0, SvREFCNT_inc_simple_NN(saw_name)),
1927 proto ? newSVOP(OP_CONST, 0, SvREFCNT_inc_simple_NN(proto)) : NULL,
1928 attrs,
1929 body
1930 );
5efe0e0e 1931 *pop = newOP(OP_NULL, 0);
c311cef3 1932 return KEYWORD_PLUGIN_STMT;
db81d362 1933 }
db81d362 1934}
1935
1936static int my_keyword_plugin(pTHX_ char *keyword_ptr, STRLEN keyword_len, OP **op_ptr) {
63915d26 1937 KWSpec spec;
db81d362 1938 int ret;
1939
1940 SAVETMPS;
1941
7dd35535 1942 if (kw_flags(aTHX_ keyword_ptr, keyword_len, &spec)) {
1943 ret = parse_fun(aTHX_ op_ptr, keyword_ptr, keyword_len, &spec);
db81d362 1944 } else {
7dd35535 1945 ret = next_keyword_plugin(aTHX_ keyword_ptr, keyword_len, op_ptr);
db81d362 1946 }
1947
1948 FREETMPS;
1949
1950 return ret;
1951}
1952
1953WARNINGS_RESET
1954
1955MODULE = Function::Parameters PACKAGE = Function::Parameters
1956PROTOTYPES: ENABLE
1957
1958BOOT:
1959WARNINGS_ENABLE {
1960 HV *const stash = gv_stashpvs(MY_PKG, GV_ADD);
426a4d69 1961 /**/
d8e5d540 1962 newCONSTSUB(stash, "FLAG_NAME_OK", newSViv(FLAG_NAME_OK));
1963 newCONSTSUB(stash, "FLAG_ANON_OK", newSViv(FLAG_ANON_OK));
63915d26 1964 newCONSTSUB(stash, "FLAG_DEFAULT_ARGS", newSViv(FLAG_DEFAULT_ARGS));
d8e5d540 1965 newCONSTSUB(stash, "FLAG_CHECK_NARGS", newSViv(FLAG_CHECK_NARGS));
1966 newCONSTSUB(stash, "FLAG_INVOCANT", newSViv(FLAG_INVOCANT));
e158cf8f 1967 newCONSTSUB(stash, "FLAG_NAMED_PARAMS", newSViv(FLAG_NAMED_PARAMS));
db81d362 1968 newCONSTSUB(stash, "HINTK_KEYWORDS", newSVpvs(HINTK_KEYWORDS));
d8e5d540 1969 newCONSTSUB(stash, "HINTK_FLAGS_", newSVpvs(HINTK_FLAGS_));
1970 newCONSTSUB(stash, "HINTK_SHIFT_", newSVpvs(HINTK_SHIFT_));
1971 newCONSTSUB(stash, "HINTK_ATTRS_", newSVpvs(HINTK_ATTRS_));
426a4d69 1972 /**/
db81d362 1973 next_keyword_plugin = PL_keyword_plugin;
1974 PL_keyword_plugin = my_keyword_plugin;
1975} WARNINGS_RESET
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