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first cut at named parameters
[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
63915d26 91enum {
92 FLAG_NAME_OK = 0x01,
93 FLAG_ANON_OK = 0x02,
94 FLAG_DEFAULT_ARGS = 0x04,
d8e5d540 95 FLAG_CHECK_NARGS = 0x08,
e158cf8f 96 FLAG_INVOCANT = 0x10,
97 FLAG_NAMED_PARAMS = 0x20
63915d26 98};
99
100DEFSTRUCT(KWSpec) {
101 unsigned flags;
b72eb6ee 102 SV *shift;
103 SV *attrs;
63915d26 104};
db81d362 105
106static int (*next_keyword_plugin)(pTHX_ char *, STRLEN, OP **);
107
63915d26 108static int kw_flags(pTHX_ const char *kw_ptr, STRLEN kw_len, KWSpec *spec) {
db81d362 109 HV *hints;
110 SV *sv, **psv;
111 const char *p, *kw_active;
112 STRLEN kw_active_len;
113
63915d26 114 spec->flags = 0;
b72eb6ee 115 spec->shift = sv_2mortal(newSVpvs(""));
116 spec->attrs = sv_2mortal(newSVpvs(""));
db81d362 117
118 if (!(hints = GvHV(PL_hintgv))) {
119 return FALSE;
120 }
121 if (!(psv = hv_fetchs(hints, HINTK_KEYWORDS, 0))) {
122 return FALSE;
123 }
124 sv = *psv;
125 kw_active = SvPV(sv, kw_active_len);
126 if (kw_active_len <= kw_len) {
127 return FALSE;
128 }
e88490f6 129 for (
130 p = kw_active;
131 (p = strchr(p, *kw_ptr)) &&
132 p < kw_active + kw_active_len - kw_len;
133 p++
134 ) {
db81d362 135 if (
136 (p == kw_active || p[-1] == ' ') &&
137 p[kw_len] == ' ' &&
138 memcmp(kw_ptr, p, kw_len) == 0
139 ) {
b72eb6ee 140
d970c3e7 141#define FETCH_HINTK_INTO(NAME, PTR, LEN, X) STMT_START { \
b72eb6ee 142 const char *fk_ptr_; \
143 STRLEN fk_len_; \
144 SV *fk_sv_; \
145 fk_sv_ = sv_2mortal(newSVpvs(HINTK_ ## NAME)); \
146 sv_catpvn(fk_sv_, PTR, LEN); \
147 fk_ptr_ = SvPV(fk_sv_, fk_len_); \
148 if (!((X) = hv_fetch(hints, fk_ptr_, fk_len_, 0))) { \
149 croak("%s: internal error: $^H{'%.*s'} not set", MY_PKG, (int)fk_len_, fk_ptr_); \
150 } \
d970c3e7 151} STMT_END
b72eb6ee 152
63915d26 153 FETCH_HINTK_INTO(FLAGS_, kw_ptr, kw_len, psv);
154 spec->flags = SvIV(*psv);
db81d362 155
b72eb6ee 156 FETCH_HINTK_INTO(SHIFT_, kw_ptr, kw_len, psv);
157 SvSetSV(spec->shift, *psv);
db81d362 158
b72eb6ee 159 FETCH_HINTK_INTO(ATTRS_, kw_ptr, kw_len, psv);
160 SvSetSV(spec->attrs, *psv);
161
162#undef FETCH_HINTK_INTO
db81d362 163 return TRUE;
164 }
165 }
166 return FALSE;
167}
168
169
311ced6f 170static void free_ptr_op(pTHX_ void *vp) {
c311cef3 171 OP **pp = vp;
172 op_free(*pp);
173 Safefree(pp);
174}
175
59016bfb 176#define sv_eq_pvs(SV, S) my_sv_eq_pvn(aTHX_ SV, "" S "", sizeof (S) - 1)
c311cef3 177
59016bfb 178static int my_sv_eq_pvn(pTHX_ SV *sv, const char *p, STRLEN n) {
c311cef3 179 STRLEN sv_len;
180 const char *sv_p = SvPV(sv, sv_len);
59016bfb 181 return memcmp(sv_p, p, n) == 0;
c311cef3 182}
183
184
185#include "padop_on_crack.c.inc"
186
187
c311cef3 188enum {
189 MY_ATTR_LVALUE = 0x01,
190 MY_ATTR_METHOD = 0x02,
191 MY_ATTR_SPECIAL = 0x04
192};
193
31534187 194static void my_sv_cat_c(pTHX_ SV *sv, U32 c) {
195 char ds[UTF8_MAXBYTES + 1], *d;
196 d = uvchr_to_utf8(ds, c);
197 if (d - ds > 1) {
198 sv_utf8_upgrade(sv);
199 }
200 sv_catpvn(sv, ds, d - ds);
201}
202
203static bool my_is_uni_xidfirst(pTHX_ UV c) {
204 U8 tmpbuf[UTF8_MAXBYTES + 1];
205 uvchr_to_utf8(tmpbuf, c);
206 return is_utf8_xidfirst(tmpbuf);
207}
208
209static bool my_is_uni_xidcont(pTHX_ UV c) {
210 U8 tmpbuf[UTF8_MAXBYTES + 1];
211 uvchr_to_utf8(tmpbuf, c);
212 return is_utf8_xidcont(tmpbuf);
213}
214
215static SV *my_scan_word(pTHX_ bool allow_package) {
216 bool at_start, at_substart;
217 I32 c;
218 SV *sv = sv_2mortal(newSVpvs(""));
219 if (lex_bufutf8()) {
220 SvUTF8_on(sv);
221 }
222
223 at_start = at_substart = TRUE;
224 c = lex_peek_unichar(0);
225
226 while (c != -1) {
227 if (at_substart ? my_is_uni_xidfirst(aTHX_ c) : my_is_uni_xidcont(aTHX_ c)) {
228 lex_read_unichar(0);
229 my_sv_cat_c(aTHX_ sv, c);
230 at_substart = FALSE;
231 c = lex_peek_unichar(0);
232 } else if (allow_package && !at_substart && c == '\'') {
233 lex_read_unichar(0);
234 c = lex_peek_unichar(0);
235 if (!my_is_uni_xidfirst(aTHX_ c)) {
236 lex_stuff_pvs("'", 0);
237 break;
238 }
239 sv_catpvs(sv, "'");
240 at_substart = TRUE;
241 } else if (allow_package && (at_start || !at_substart) && c == ':') {
242 lex_read_unichar(0);
243 if (lex_peek_unichar(0) != ':') {
244 lex_stuff_pvs(":", 0);
245 break;
246 }
247 lex_read_unichar(0);
248 c = lex_peek_unichar(0);
249 if (!my_is_uni_xidfirst(aTHX_ c)) {
250 lex_stuff_pvs("::", 0);
251 break;
252 }
253 sv_catpvs(sv, "::");
254 at_substart = TRUE;
255 } else {
256 break;
257 }
258 at_start = FALSE;
259 }
260
261 return SvCUR(sv) ? sv : NULL;
262}
263
264static SV *my_scan_parens_tail(pTHX_ bool keep_backslash) {
265 I32 c, nesting;
266 SV *sv;
267 line_t start;
268
269 start = CopLINE(PL_curcop);
270
271 sv = sv_2mortal(newSVpvs(""));
272 if (lex_bufutf8()) {
273 SvUTF8_on(sv);
274 }
275
276 nesting = 0;
277 for (;;) {
278 c = lex_read_unichar(0);
279 if (c == EOF) {
280 CopLINE_set(PL_curcop, start);
281 return NULL;
282 }
283
284 if (c == '\\') {
285 c = lex_read_unichar(0);
286 if (c == EOF) {
287 CopLINE_set(PL_curcop, start);
288 return NULL;
289 }
290 if (keep_backslash || (c != '(' && c != ')')) {
291 sv_catpvs(sv, "\\");
292 }
293 } else if (c == '(') {
294 nesting++;
295 } else if (c == ')') {
296 if (!nesting) {
297 break;
298 }
299 nesting--;
300 }
301
302 my_sv_cat_c(aTHX_ sv, c);
303 }
304
305 return sv;
306}
307
308static void my_check_prototype(pTHX_ const SV *declarator, SV *proto) {
309 char *start, *r, *w, *end;
310 STRLEN len;
311
312 /* strip spaces */
313 start = SvPV(proto, len);
314 end = start + len;
315
316 for (w = r = start; r < end; r++) {
317 if (!isSPACE(*r)) {
318 *w++ = *r;
319 }
320 }
321 *w = '\0';
322 SvCUR_set(proto, w - start);
323 end = w;
324 len = end - start;
325
326 if (!ckWARN(WARN_ILLEGALPROTO)) {
327 return;
328 }
329
330 /* check for bad characters */
331 if (strspn(start, "$@%*;[]&\\_+") != len) {
332 SV *dsv = newSVpvs_flags("", SVs_TEMP);
333 warner(
334 packWARN(WARN_ILLEGALPROTO),
335 "Illegal character in prototype for %"SVf" : %s",
336 SVfARG(declarator),
337 SvUTF8(proto)
338 ? sv_uni_display(
339 dsv,
340 proto,
341 len,
342 UNI_DISPLAY_ISPRINT
343 )
344 : pv_pretty(dsv, start, len, 60, NULL, NULL,
345 PERL_PV_ESCAPE_NONASCII
346 )
347 );
348 return;
349 }
350
351 for (r = start; r < end; r++) {
352 switch (*r) {
353 default:
354 warner(
355 packWARN(WARN_ILLEGALPROTO),
356 "Illegal character in prototype for %"SVf" : %s",
357 SVfARG(declarator), r
358 );
359 return;
360
361 case '_':
362 if (r[1] && !strchr(";@%", *r)) {
363 warner(
364 packWARN(WARN_ILLEGALPROTO),
365 "Illegal character after '_' in prototype for %"SVf" : %s",
366 SVfARG(declarator), r
367 );
368 return;
369 }
370 break;
371
372 case '@':
373 case '%':
374 if (r[1]) {
375 warner(
376 packWARN(WARN_ILLEGALPROTO),
377 "prototype after '%c' for %"SVf": %s",
378 *r, SVfARG(declarator), r + 1
379 );
380 return;
381 }
382 break;
383
384 case '\\':
385 r++;
386 if (strchr("$@%&*", *r)) {
387 break;
388 }
389 if (*r == '[') {
390 r++;
391 for (; r < end && *r != ']'; r++) {
392 if (!strchr("$@%&*", *r)) {
393 break;
394 }
395 }
396 if (*r == ']' && r[-1] != '[') {
397 break;
398 }
399 }
400 warner(
401 packWARN(WARN_ILLEGALPROTO),
402 "Illegal character after '\\' in prototype for %"SVf" : %s",
403 SVfARG(declarator), r
404 );
405 return;
406
407 case '$':
408 case '*':
409 case '&':
410 case ';':
411 case '+':
412 break;
413 }
414 }
415}
416
e158cf8f 417
418DEFSTRUCT(Param) {
419 SV *name;
420 PADOFFSET padoff;
421};
422
423DEFSTRUCT(ParamInit) {
424 Param param;
425 OP *init;
426};
427
428#define VEC(B) B ## _Vec
429
430#define DEFVECTOR(B) DEFSTRUCT(VEC(B)) { \
431 B (*data); \
432 size_t used, size; \
433}
434
435DEFVECTOR(Param);
436DEFVECTOR(ParamInit);
437
438#define DEFVECTOR_INIT(N, B) static void N(VEC(B) *p) { \
439 p->used = 0; \
440 p->size = 23; \
441 Newx(p->data, p->size, B); \
442} static void N(VEC(B) *)
443
444DEFSTRUCT(ParamSpec) {
445 Param invocant;
446 VEC(Param) positional_required;
447 VEC(ParamInit) positional_optional;
448 VEC(Param) named_required;
449 VEC(ParamInit) named_optional;
450 Param slurpy;
451};
452
453DEFVECTOR_INIT(pv_init, Param);
454DEFVECTOR_INIT(piv_init, ParamInit);
455
456static void p_init(Param *p) {
457 p->name = NULL;
458 p->padoff = NOT_IN_PAD;
459}
460
461static void ps_init(ParamSpec *ps) {
462 p_init(&ps->invocant);
463 pv_init(&ps->positional_required);
464 piv_init(&ps->positional_optional);
465 pv_init(&ps->named_required);
466 piv_init(&ps->named_optional);
467 p_init(&ps->slurpy);
468}
469
470#define DEFVECTOR_EXTEND(N, B) static B (*N(VEC(B) *p)) { \
471 assert(p->used <= p->size); \
472 if (p->used == p->size) { \
473 const size_t n = p->size / 2 * 3 + 1; \
474 Renew(p->data, n, B); \
475 p->size = n; \
476 } \
477 return &p->data[p->used]; \
478} static B (*N(VEC(B) *))
479
480DEFVECTOR_EXTEND(pv_extend, Param);
481DEFVECTOR_EXTEND(piv_extend, ParamInit);
482
483#define DEFVECTOR_CLEAR(N, B, F) static void N(pTHX_ VEC(B) *p) { \
484 while (p->used) { \
485 p->used--; \
486 F(aTHX_ &p->data[p->used]); \
487 } \
488 Safefree(p->data); \
489 p->data = NULL; \
490 p->size = 0; \
491} static void N(pTHX_ VEC(B) *)
492
493static void p_clear(pTHX_ Param *p) {
494 p->name = NULL;
495 p->padoff = NOT_IN_PAD;
496}
497
498static void pi_clear(pTHX_ ParamInit *pi) {
499 p_clear(aTHX_ &pi->param);
500 if (pi->init) {
501 op_free(pi->init);
502 pi->init = NULL;
503 }
504}
505
506DEFVECTOR_CLEAR(pv_clear, Param, p_clear);
507DEFVECTOR_CLEAR(piv_clear, ParamInit, pi_clear);
508
509static void ps_clear(pTHX_ ParamSpec *ps) {
510 p_clear(aTHX_ &ps->invocant);
511
512 pv_clear(aTHX_ &ps->positional_required);
513 piv_clear(aTHX_ &ps->positional_optional);
514
515 pv_clear(aTHX_ &ps->named_required);
516 piv_clear(aTHX_ &ps->named_optional);
517
518 p_clear(aTHX_ &ps->slurpy);
519}
520
521static int ps_contains(pTHX_ const ParamSpec *ps, SV *sv) {
522 size_t i, lim;
523
524 if (ps->invocant.name && sv_eq(sv, ps->invocant.name)) {
525 return 1;
526 }
527
528 for (i = 0, lim = ps->positional_required.used; i < lim; i++) {
529 if (sv_eq(sv, ps->positional_required.data[i].name)) {
530 return 1;
531 }
532 }
533
534 for (i = 0, lim = ps->positional_optional.used; i < lim; i++) {
535 if (sv_eq(sv, ps->positional_optional.data[i].param.name)) {
536 return 1;
537 }
538 }
539
540 for (i = 0, lim = ps->named_required.used; i < lim; i++) {
541 if (sv_eq(sv, ps->named_required.data[i].name)) {
542 return 1;
543 }
544 }
545
546 for (i = 0, lim = ps->named_optional.used; i < lim; i++) {
547 if (sv_eq(sv, ps->named_optional.data[i].param.name)) {
548 return 1;
549 }
550 }
551
552 return 0;
553}
554
555static void ps_free_void(pTHX_ void *p) {
556 ps_clear(aTHX_ p);
557 Safefree(p);
558}
559
560static int args_min(pTHX_ const ParamSpec *ps, const KWSpec *ks) {
561 int n = 0;
562 if (!ps) {
563 return SvTRUE(ks->shift) ? 1 : 0;
564 }
565 if (ps->invocant.name) {
566 n++;
567 }
568 n += ps->positional_required.used;
569 n += ps->named_required.used * 2;
570 return n;
571}
572
573static int args_max(const ParamSpec *ps) {
574 int n = 0;
575 if (!ps) {
576 return -1;
577 }
578 if (ps->invocant.name) {
579 n++;
580 }
581 n += ps->positional_required.used;
582 n += ps->positional_optional.used;
583 if (ps->named_required.used || ps->named_optional.used || ps->slurpy.name) {
584 n = -1;
585 }
586 return n;
587}
588
589static size_t count_positional_params(const ParamSpec *ps) {
590 return ps->positional_required.used + ps->positional_optional.used;
591}
592
593static size_t count_named_params(const ParamSpec *ps) {
594 return ps->named_required.used + ps->named_optional.used;
595}
596
597enum {
598 PARAM_INVOCANT = 0x01,
599 PARAM_NAMED = 0x02
600};
601
602/* *pinit must be NULL on entry.
603 * caller must free *pinit on error.
604 */
605static PADOFFSET parse_param(
606 pTHX_
607 const SV *declarator, const KWSpec *spec, ParamSpec *param_spec,
608 int *pflags, SV **pname, OP **pinit
609) {
610 I32 c;
611 char sigil;
612 SV *name;
613
614 assert(!*pinit);
615 *pflags = 0;
616
617 c = lex_peek_unichar(0);
618
619 if (c == ':') {
620 lex_read_unichar(0);
621 lex_read_space(0);
622
623 *pflags |= PARAM_NAMED;
624
625 c = lex_peek_unichar(0);
626 }
627
628 if (c == -1) {
629 croak("In %"SVf": unterminated parameter list", SVfARG(declarator));
630 }
631 if (!(c == '$' || c == '@' || c == '%')) {
632 croak("In %"SVf": unexpected '%c' in parameter list (expecting a sigil)", SVfARG(declarator), (int)c);
633 }
634
635 sigil = c;
636
637 lex_read_unichar(0);
638 lex_read_space(0);
639
640 if (!(name = my_scan_word(aTHX_ FALSE))) {
641 croak("In %"SVf": missing identifier after '%c'", SVfARG(declarator), sigil);
642 }
643 sv_insert(name, 0, 0, &sigil, 1);
644 *pname = name;
645
646 lex_read_space(0);
647 c = lex_peek_unichar(0);
648
649 if (c == '=') {
650 lex_read_unichar(0);
651 lex_read_space(0);
652
653
654 if (!param_spec->invocant.name && SvTRUE(spec->shift)) {
655 param_spec->invocant.name = spec->shift;
656 param_spec->invocant.padoff = pad_add_name_sv(param_spec->invocant.name, 0, NULL, NULL);
657 }
658
659 *pinit = parse_termexpr(0);
660
661 lex_read_space(0);
662 c = lex_peek_unichar(0);
663 }
664
665 if (c == ':') {
666 *pflags |= PARAM_INVOCANT;
667 lex_read_unichar(0);
668 lex_read_space(0);
669 } else if (c == ',') {
670 lex_read_unichar(0);
671 lex_read_space(0);
672 } else if (c != ')') {
673 if (c == -1) {
674 croak("In %"SVf": unterminated parameter list", SVfARG(declarator));
675 }
676 croak("In %"SVf": unexpected '%c' in parameter list (expecting ',')", SVfARG(declarator), (int)c);
677 }
678
679 return pad_add_name_sv(*pname, IF_HAVE_PERL_5_16(padadd_NO_DUP_CHECK, 0), NULL, NULL);
680}
681
682static OP *my_var_g(pTHX_ I32 type, I32 flags, PADOFFSET padoff) {
683 OP *var = newOP(type, flags);
684 var->op_targ = padoff;
685 return var;
686}
687
688static OP *my_var(pTHX_ I32 flags, PADOFFSET padoff) {
689 return my_var_g(aTHX_ OP_PADSV, flags, padoff);
690}
691
692static SV *mkbits1(pTHX_ size_t n) {
693 size_t bytes = n / 8, bits = n % 8;
694 SV *sv = newSV(bytes + !!bits);
695 char *p = SvPVX(sv), *q = p;
696 while (bytes--) {
697 *p++ = '\xff';
698 }
699 if (bits) {
700 *p++ = (1u << bits) - 1;
701 }
702 *p = '\0';
703 SvCUR_set(sv, p - q);
704 SvPOK_on(sv);
705 return sv;
706}
707
708static OP *mkvecbits(pTHX_ PADOFFSET padoff, size_t i) {
709 OP *first, *mid, *last, *vec;
710
711 last = newSVOP(OP_CONST, 0, newSViv(1));
712 first = last;
713
714 mid = newSVOP(OP_CONST, 0, newSViv(i));
715 mid->op_sibling = first;
716 first = mid;
717
718 mid = my_var(aTHX_ 0, padoff);
719 mid->op_sibling = first;
720
721 first = newOP(OP_PUSHMARK, 0);
722
723 vec = newLISTOP(OP_VEC, 0, first, mid);
724 vec->op_targ = pad_alloc(OP_VEC, SVs_PADTMP);
725 ((LISTOP *)vec)->op_last = last;
726 op_null(((LISTOP *)vec)->op_first);
727
728 return vec;
729}
730
731static OP *mkargselem(pTHX_ OP *index) {
732 OP *args = newAVREF(newGVOP(OP_GV, 0, PL_defgv));
733 args->op_flags |= OPf_REF;
734
735 return newBINOP(OP_AELEM, 0, args, index);
736}
737
738static OP *mkargselemv(pTHX_ PADOFFSET v) {
739 return mkargselem(aTHX_ my_var(aTHX_ 0, v));
740}
741
63915d26 742static int parse_fun(pTHX_ OP **pop, const char *keyword_ptr, STRLEN keyword_len, const KWSpec *spec) {
e158cf8f 743 ParamSpec *param_spec;
c311cef3 744 SV *declarator;
745 I32 floor_ix;
63915d26 746 int save_ix;
c311cef3 747 SV *saw_name;
1e0f1595 748 OP **prelude_sentinel;
c311cef3 749 SV *proto;
750 OP **attrs_sentinel, *body;
751 unsigned builtin_attrs;
db81d362 752 I32 c;
753
db81d362 754 declarator = sv_2mortal(newSVpvn(keyword_ptr, keyword_len));
db81d362 755
db81d362 756 lex_read_space(0);
757
c311cef3 758 builtin_attrs = 0;
759
db81d362 760 /* function name */
c311cef3 761 saw_name = NULL;
31534187 762 if ((spec->flags & FLAG_NAME_OK) && (saw_name = my_scan_word(aTHX_ TRUE))) {
c311cef3 763
764 if (PL_parser->expect != XSTATE) {
765 /* bail out early so we don't predeclare $saw_name */
766 croak("In %"SVf": I was expecting a function body, not \"%"SVf"\"", SVfARG(declarator), SVfARG(saw_name));
767 }
768
db81d362 769 sv_catpvs(declarator, " ");
c311cef3 770 sv_catsv(declarator, saw_name);
771
772 if (
773 sv_eq_pvs(saw_name, "BEGIN") ||
774 sv_eq_pvs(saw_name, "END") ||
775 sv_eq_pvs(saw_name, "INIT") ||
776 sv_eq_pvs(saw_name, "CHECK") ||
777 sv_eq_pvs(saw_name, "UNITCHECK")
778 ) {
779 builtin_attrs |= MY_ATTR_SPECIAL;
780 }
781
db81d362 782 lex_read_space(0);
63915d26 783 } else if (!(spec->flags & FLAG_ANON_OK)) {
31534187 784 croak("I was expecting a function name, not \"%.*s\"", (int)(PL_parser->bufend - PL_parser->bufptr), PL_parser->bufptr);
db81d362 785 } else {
786 sv_catpvs(declarator, " (anon)");
787 }
788
63915d26 789 /* we're a subroutine declaration */
c311cef3 790 floor_ix = start_subparse(FALSE, saw_name ? 0 : CVf_ANON);
791 SAVEFREESV(PL_compcv);
792
63915d26 793 /* create outer block: '{' */
794 save_ix = S_block_start(aTHX_ TRUE);
795
1e0f1595 796 /* initialize synthetic optree */
797 Newx(prelude_sentinel, 1, OP *);
798 *prelude_sentinel = NULL;
799 SAVEDESTRUCTOR_X(free_ptr_op, prelude_sentinel);
800
db81d362 801 /* parameters */
e158cf8f 802 param_spec = NULL;
63915d26 803
db81d362 804 c = lex_peek_unichar(0);
805 if (c == '(') {
e158cf8f 806 OP **init_sentinel;
807
808 Newx(init_sentinel, 1, OP *);
809 *init_sentinel = NULL;
810 SAVEDESTRUCTOR_X(free_ptr_op, init_sentinel);
811
812 Newx(param_spec, 1, ParamSpec);
813 ps_init(param_spec);
814 SAVEDESTRUCTOR_X(ps_free_void, param_spec);
db81d362 815
816 lex_read_unichar(0);
817 lex_read_space(0);
818
e158cf8f 819 while ((c = lex_peek_unichar(0)) != ')') {
820 int flags;
821 SV *name;
822 char sigil;
823 PADOFFSET padoff;
c311cef3 824
e158cf8f 825 padoff = parse_param(aTHX_ declarator, spec, param_spec, &flags, &name, init_sentinel);
c311cef3 826
e158cf8f 827 S_intro_my(aTHX);
63915d26 828
e158cf8f 829 sigil = SvPV_nolen(name)[0];
db81d362 830
e158cf8f 831 /* internal consistency */
832 if (flags & PARAM_NAMED) {
833 if (flags & PARAM_INVOCANT) {
834 croak("In %"SVf": invocant %"SVf" can't be a named parameter", SVfARG(declarator), SVfARG(name));
db81d362 835 }
e158cf8f 836 if (sigil != '$') {
837 croak("In %"SVf": named parameter %"SVf" can't be a%s", SVfARG(declarator), SVfARG(name), sigil == '@' ? "n array" : " hash");
db81d362 838 }
e158cf8f 839 } else if (flags & PARAM_INVOCANT) {
840 if (*init_sentinel) {
841 croak("In %"SVf": invocant %"SVf" can't have a default value", SVfARG(declarator), SVfARG(name));
db81d362 842 }
e158cf8f 843 if (sigil != '$') {
844 croak("In %"SVf": invocant %"SVf" can't be a%s", SVfARG(declarator), SVfARG(name), sigil == '@' ? "n array" : " hash");
845 }
846 } else if (sigil != '$' && *init_sentinel) {
847 croak("In %"SVf": %s %"SVf" can't have a default value", SVfARG(declarator), sigil == '@' ? "array" : "hash", SVfARG(name));
848 }
db81d362 849
e158cf8f 850 /* external constraints */
851 if (param_spec->slurpy.name) {
852 croak("In %"SVf": I was expecting \")\" after \"%"SVf"\", not \"%"SVf"\"", SVfARG(declarator), SVfARG(param_spec->slurpy.name), SVfARG(name));
853 }
854 if (sigil != '$') {
855 assert(!*init_sentinel);
856 param_spec->slurpy.name = name;
857 param_spec->slurpy.padoff = padoff;
858 continue;
859 }
d8e5d540 860
e158cf8f 861 if (!(flags & PARAM_NAMED) && count_named_params(param_spec)) {
862 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));
863 }
d8e5d540 864
e158cf8f 865 if (flags & PARAM_INVOCANT) {
866 if (param_spec->invocant.name) {
867 croak("In %"SVf": invalid double invocants %"SVf", %"SVf"", SVfARG(declarator), SVfARG(param_spec->invocant.name), SVfARG(name));
868 }
869 if (count_positional_params(param_spec) || count_named_params(param_spec)) {
870 croak("In %"SVf": invocant %"SVf" must be first in parameter list", SVfARG(declarator), SVfARG(name));
63915d26 871 }
e158cf8f 872 if (!(spec->flags & FLAG_INVOCANT)) {
873 croak("In %"SVf": invocant %"SVf" not allowed here", SVfARG(declarator), SVfARG(name));
874 }
875 param_spec->invocant.name = name;
876 param_spec->invocant.padoff = padoff;
877 continue;
878 }
63915d26 879
e158cf8f 880 if (*init_sentinel && !(spec->flags & FLAG_DEFAULT_ARGS)) {
881 croak("In %"SVf": default argument for %"SVf" not allowed here", SVfARG(declarator), SVfARG(name));
882 }
1e0f1595 883
e158cf8f 884 if (ps_contains(aTHX_ param_spec, name)) {
885 croak("In %"SVf": %"SVf" can't appear twice in the same parameter list", SVfARG(declarator), SVfARG(name));
886 }
1e0f1595 887
e158cf8f 888 if (flags & PARAM_NAMED) {
889 if (!(spec->flags & FLAG_NAMED_PARAMS)) {
890 croak("In %"SVf": named parameter :%"SVf" not allowed here", SVfARG(declarator), SVfARG(name));
1e0f1595 891 }
892
e158cf8f 893 if (*init_sentinel) {
894 ParamInit *pi = piv_extend(&param_spec->named_optional);
895 pi->param.name = name;
896 pi->param.padoff = padoff;
897 pi->init = *init_sentinel;
898 *init_sentinel = NULL;
899 param_spec->named_optional.used++;
900 } else {
901 if (param_spec->positional_optional.used) {
902 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));
903 }
d8e5d540 904
e158cf8f 905 Param *p = pv_extend(&param_spec->named_required);
906 p->name = name;
907 p->padoff = padoff;
908 param_spec->named_required.used++;
909 }
910 } else {
911 if (*init_sentinel || param_spec->positional_optional.used) {
912 ParamInit *pi = piv_extend(&param_spec->positional_optional);
913 pi->param.name = name;
914 pi->param.padoff = padoff;
915 pi->init = *init_sentinel;
916 *init_sentinel = NULL;
917 param_spec->positional_optional.used++;
918 } else {
919 Param *p = pv_extend(&param_spec->positional_required);
920 p->name = name;
921 p->padoff = padoff;
922 param_spec->positional_required.used++;
db81d362 923 }
924 }
925
e158cf8f 926 }
927 lex_read_unichar(0);
928 lex_read_space(0);
929 *init_sentinel = NULL;
db81d362 930
e158cf8f 931 if (!param_spec->invocant.name && SvTRUE(spec->shift)) {
932 if (ps_contains(aTHX_ param_spec, spec->shift)) {
933 croak("In %"SVf": %"SVf" can't appear twice in the same parameter list", SVfARG(declarator), SVfARG(spec->shift));
db81d362 934 }
e158cf8f 935
936 param_spec->invocant.name = spec->shift;
937 param_spec->invocant.padoff = pad_add_name_sv(param_spec->invocant.name, 0, NULL, NULL);
db81d362 938 }
939 }
940
941 /* prototype */
c311cef3 942 proto = NULL;
db81d362 943 c = lex_peek_unichar(0);
944 if (c == ':') {
945 lex_read_unichar(0);
946 lex_read_space(0);
947
948 c = lex_peek_unichar(0);
949 if (c != '(') {
c311cef3 950 lex_stuff_pvs(":", 0);
951 c = ':';
db81d362 952 } else {
31534187 953 lex_read_unichar(0);
954 if (!(proto = my_scan_parens_tail(aTHX_ FALSE))) {
f34187b8 955 croak("In %"SVf": prototype not terminated", SVfARG(declarator));
db81d362 956 }
31534187 957 my_check_prototype(aTHX_ declarator, proto);
db81d362 958 lex_read_space(0);
c311cef3 959 c = lex_peek_unichar(0);
db81d362 960 }
961 }
962
db81d362 963 /* attributes */
c311cef3 964 Newx(attrs_sentinel, 1, OP *);
965 *attrs_sentinel = NULL;
311ced6f 966 SAVEDESTRUCTOR_X(free_ptr_op, attrs_sentinel);
c311cef3 967
63915d26 968 if (c == ':' || c == '{') /* '}' - hi, vim */ {
c311cef3 969
970 /* kludge default attributes in */
971 if (SvTRUE(spec->attrs) && SvPV_nolen(spec->attrs)[0] == ':') {
972 lex_stuff_sv(spec->attrs, 0);
973 c = ':';
974 }
b72eb6ee 975
db81d362 976 if (c == ':') {
db81d362 977 lex_read_unichar(0);
978 lex_read_space(0);
db81d362 979 c = lex_peek_unichar(0);
c311cef3 980
981 for (;;) {
982 SV *attr;
983
31534187 984 if (!(attr = my_scan_word(aTHX_ FALSE))) {
c311cef3 985 break;
db81d362 986 }
c311cef3 987
db81d362 988 lex_read_space(0);
989 c = lex_peek_unichar(0);
c311cef3 990
991 if (c != '(') {
992 if (sv_eq_pvs(attr, "lvalue")) {
993 builtin_attrs |= MY_ATTR_LVALUE;
994 attr = NULL;
995 } else if (sv_eq_pvs(attr, "method")) {
996 builtin_attrs |= MY_ATTR_METHOD;
997 attr = NULL;
998 }
999 } else {
31534187 1000 SV *sv;
1001 lex_read_unichar(0);
1002 if (!(sv = my_scan_parens_tail(aTHX_ TRUE))) {
c311cef3 1003 croak("In %"SVf": unterminated attribute parameter in attribute list", SVfARG(declarator));
1004 }
31534187 1005 sv_catpvs(attr, "(");
c311cef3 1006 sv_catsv(attr, sv);
31534187 1007 sv_catpvs(attr, ")");
c311cef3 1008
1009 lex_read_space(0);
1010 c = lex_peek_unichar(0);
1011 }
1012
1013 if (attr) {
1014 *attrs_sentinel = op_append_elem(OP_LIST, *attrs_sentinel, newSVOP(OP_CONST, 0, SvREFCNT_inc_simple_NN(attr)));
1015 }
1016
1017 if (c == ':') {
1018 lex_read_unichar(0);
1019 lex_read_space(0);
1020 c = lex_peek_unichar(0);
1021 }
db81d362 1022 }
1023 }
1024 }
1025
1026 /* body */
63915d26 1027 if (c != '{') /* '}' - hi, vim */ {
85bc3fbd 1028 croak("In %"SVf": I was expecting a function body, not \"%c\"", SVfARG(declarator), (int)c);
db81d362 1029 }
c311cef3 1030
63915d26 1031 /* surprise predeclaration! */
1032 if (saw_name) {
1033 /* 'sub NAME (PROTO);' to make name/proto known to perl before it
1034 starts parsing the body */
1035 const I32 sub_ix = start_subparse(FALSE, 0);
1036 SAVEFREESV(PL_compcv);
1037
1038 SvREFCNT_inc_simple_void(PL_compcv);
1039
1040 newATTRSUB(
1041 sub_ix,
1042 newSVOP(OP_CONST, 0, SvREFCNT_inc_simple_NN(saw_name)),
1043 proto ? newSVOP(OP_CONST, 0, SvREFCNT_inc_simple_NN(proto)) : NULL,
1044 NULL,
1045 NULL
1046 );
1047 }
1048
c311cef3 1049 if (builtin_attrs & MY_ATTR_LVALUE) {
1050 CvLVALUE_on(PL_compcv);
db81d362 1051 }
c311cef3 1052 if (builtin_attrs & MY_ATTR_METHOD) {
1053 CvMETHOD_on(PL_compcv);
1054 }
1055 if (builtin_attrs & MY_ATTR_SPECIAL) {
1056 CvSPECIAL_on(PL_compcv);
db81d362 1057 }
1058
e158cf8f 1059 /* check number of arguments */
1060 if (spec->flags & FLAG_CHECK_NARGS) {
1061 int amin, amax;
1062 size_t named;
d8e5d540 1063
e158cf8f 1064 amin = args_min(aTHX_ param_spec, spec);
1065 if (amin > 0) {
1066 OP *chk, *cond, *err, *croak;
d8e5d540 1067
e158cf8f 1068 err = newSVOP(OP_CONST, 0,
1069 newSVpvf("Not enough arguments for %"SVf" (expected %d, got ", SVfARG(declarator), amin));
1070 err = newBINOP(OP_CONCAT, 0,
1071 err,
1072 newAVREF(newGVOP(OP_GV, 0, PL_defgv)));
1073 err = newBINOP(OP_CONCAT, 0,
1074 err,
1075 newSVOP(OP_CONST, 0, newSVpvs(")")));
d8e5d540 1076
e158cf8f 1077 croak = newCVREF(OPf_WANT_SCALAR,
1078 newGVOP(OP_GV, 0, gv_fetchpvs("Carp::croak", 0, SVt_PVCV)));
1079 err = newUNOP(OP_ENTERSUB, OPf_STACKED,
1080 op_append_elem(OP_LIST, err, croak));
d8e5d540 1081
e158cf8f 1082 cond = newBINOP(OP_LT, 0,
1083 newAVREF(newGVOP(OP_GV, 0, PL_defgv)),
1084 newSVOP(OP_CONST, 0, newSViv(amin)));
1085 chk = newLOGOP(OP_AND, 0, cond, err);
1086
1087 *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, newSTATEOP(0, NULL, chk));
1e0f1595 1088 }
abccbe86 1089
e158cf8f 1090 amax = args_max(param_spec);
1091 if (amax >= 0) {
1e0f1595 1092 OP *chk, *cond, *err, *croak;
63915d26 1093
1e0f1595 1094 err = newSVOP(OP_CONST, 0,
e158cf8f 1095 newSVpvf("Too many arguments for %"SVf" (expected %d, got ", SVfARG(declarator), amax));
1096 err = newBINOP(OP_CONCAT, 0,
1097 err,
1098 newAVREF(newGVOP(OP_GV, 0, PL_defgv)));
1099 err = newBINOP(OP_CONCAT, 0,
1100 err,
1101 newSVOP(OP_CONST, 0, newSVpvs(")")));
63915d26 1102
1e0f1595 1103 croak = newCVREF(OPf_WANT_SCALAR,
e158cf8f 1104 newGVOP(OP_GV, 0, gv_fetchpvs("Carp::croak", 0, SVt_PVCV)));
1e0f1595 1105 err = newUNOP(OP_ENTERSUB, OPf_STACKED,
e158cf8f 1106 op_append_elem(OP_LIST, err, croak));
63915d26 1107
e158cf8f 1108 cond = newBINOP(OP_GT, 0,
1109 newAVREF(newGVOP(OP_GV, 0, PL_defgv)),
1110 newSVOP(OP_CONST, 0, newSViv(amax)));
1e0f1595 1111 chk = newLOGOP(OP_AND, 0, cond, err);
63915d26 1112
1e0f1595 1113 *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, newSTATEOP(0, NULL, chk));
1114 }
e158cf8f 1115
1116 if (param_spec && (count_named_params(param_spec) || (param_spec->slurpy.name && SvPV_nolen(param_spec->slurpy.name)[0] == '%'))) {
1e0f1595 1117 OP *chk, *cond, *err, *croak;
e158cf8f 1118 const UV fixed = count_positional_params(param_spec) + !!param_spec->invocant.name;
63915d26 1119
1e0f1595 1120 err = newSVOP(OP_CONST, 0,
e158cf8f 1121 newSVpvf("Odd number of paired arguments for %"SVf"", SVfARG(declarator)));
63915d26 1122
1e0f1595 1123 croak = newCVREF(OPf_WANT_SCALAR,
e158cf8f 1124 newGVOP(OP_GV, 0, gv_fetchpvs("Carp::croak", 0, SVt_PVCV)));
1e0f1595 1125 err = newUNOP(OP_ENTERSUB, OPf_STACKED,
e158cf8f 1126 op_append_elem(OP_LIST, err, croak));
63915d26 1127
1e0f1595 1128 cond = newBINOP(OP_GT, 0,
e158cf8f 1129 fixed
1130 ? newBINOP(OP_SUBTRACT, 0,
1131 newAVREF(newGVOP(OP_GV, 0, PL_defgv)),
1132 newSVOP(OP_CONST, 0, newSVuv(fixed)))
1133 : newAVREF(newGVOP(OP_GV, 0, PL_defgv)),
1134 newSVOP(OP_CONST, 0, newSViv(0)));
1135 cond = newLOGOP(OP_AND, 0,
1136 cond,
1137 newBINOP(OP_MODULO, 0,
1138 fixed
1139 ? newBINOP(OP_SUBTRACT, 0,
1140 newAVREF(newGVOP(OP_GV, 0, PL_defgv)),
1141 newSVOP(OP_CONST, 0, newSVuv(fixed)))
1142 : newAVREF(newGVOP(OP_GV, 0, PL_defgv)),
1143 newSVOP(OP_CONST, 0, newSViv(2))));
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));
c311cef3 1147 }
1e0f1595 1148 }
c311cef3 1149
e158cf8f 1150 if (!param_spec) {
1151 /* my $invocant = shift; */
1152 if (SvTRUE(spec->shift)) {
1153 OP *var;
abccbe86 1154
e158cf8f 1155 var = my_var(
1156 aTHX_
1157 OPf_MOD | (OPpLVAL_INTRO << 8),
1158 pad_add_name_sv(spec->shift, 0, NULL, NULL)
1159 );
1160 var = newASSIGNOP(OPf_STACKED, var, 0, newOP(OP_SHIFT, 0));
c311cef3 1161
e158cf8f 1162 *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, newSTATEOP(0, NULL, var));
1163 }
1164 } else {
1165 /* my $invocant = shift; */
1166 if (param_spec->invocant.name) {
1167 OP *var;
c311cef3 1168
e158cf8f 1169 var = my_var(
1170 aTHX_
1171 OPf_MOD | (OPpLVAL_INTRO << 8),
1172 param_spec->invocant.padoff
1173 );
1174 var = newASSIGNOP(OPf_STACKED, var, 0, newOP(OP_SHIFT, 0));
1e0f1595 1175
e158cf8f 1176 *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, newSTATEOP(0, NULL, var));
c311cef3 1177 }
1178
e158cf8f 1179 /* my (...) = @_; */
1180 {
1181 OP *lhs;
1182 size_t i, lim;
63915d26 1183
e158cf8f 1184 lhs = NULL;
63915d26 1185
e158cf8f 1186 for (i = 0, lim = param_spec->positional_required.used; i < lim; i++) {
1187 OP *const var = my_var(
1188 aTHX_
1189 OPf_WANT_LIST | (OPpLVAL_INTRO << 8),
1190 param_spec->positional_required.data[i].padoff
1191 );
1192 lhs = op_append_elem(OP_LIST, lhs, var);
1193 }
63915d26 1194
e158cf8f 1195 for (i = 0, lim = param_spec->positional_optional.used; i < lim; i++) {
1196 OP *const var = my_var(
1197 aTHX_
1198 OPf_WANT_LIST | (OPpLVAL_INTRO << 8),
1199 param_spec->positional_optional.data[i].param.padoff
1200 );
1201 lhs = op_append_elem(OP_LIST, lhs, var);
1202 }
63915d26 1203
e158cf8f 1204 if (param_spec->slurpy.name) {
1205 if (count_named_params(param_spec)) {
1206 OP *const var = my_var_g(
1207 aTHX_
1208 SvPV_nolen(param_spec->slurpy.name)[0] == '@' ? OP_PADAV : OP_PADHV,
1209 OPf_MOD | (OPpLVAL_INTRO << 8),
1210 param_spec->slurpy.padoff
1211 );
1212 *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, newSTATEOP(0, NULL, var));
1213 } else {
1214 OP *const var = my_var_g(
1215 aTHX_
1216 SvPV_nolen(param_spec->slurpy.name)[0] == '@' ? OP_PADAV : OP_PADHV,
1217 OPf_WANT_LIST | (OPpLVAL_INTRO << 8),
1218 param_spec->slurpy.padoff
1219 );
1220 lhs = op_append_elem(OP_LIST, lhs, var);
1221 }
1222 }
63915d26 1223
e158cf8f 1224 if (lhs) {
1225 OP *rhs;
1226 lhs->op_flags |= OPf_PARENS;
1227 rhs = newAVREF(newGVOP(OP_GV, 0, PL_defgv));
1228
1229 *prelude_sentinel = op_append_list(
1230 OP_LINESEQ, *prelude_sentinel,
1231 newSTATEOP(
1232 0, NULL,
1233 newASSIGNOP(OPf_STACKED, lhs, 0, rhs)
1234 )
1235 );
1236 }
1237 }
63915d26 1238
e158cf8f 1239 /* default arguments */
1240 {
1241 size_t i, lim, req;
1242 OP *nest;
63915d26 1243
e158cf8f 1244 nest = NULL;
63915d26 1245
e158cf8f 1246 req = param_spec->positional_required.used;
1247 for (i = 0, lim = param_spec->positional_optional.used; i < lim; i++) {
1248 ParamInit *cur = &param_spec->positional_optional.data[i];
1249 OP *var, *cond;
63915d26 1250
e158cf8f 1251 cond = newBINOP(
1252 OP_LT, 0,
1253 newAVREF(newGVOP(OP_GV, 0, PL_defgv)),
1254 newSVOP(OP_CONST, 0, newSViv(req + i + 1))
1255 );
1e0f1595 1256
e158cf8f 1257 var = my_var(aTHX_ 0, cur->param.padoff);
1258
1259 nest = op_append_list(
1260 OP_LINESEQ, nest,
1261 newASSIGNOP(OPf_STACKED, var, 0, cur->init)
1262 );
1263 cur->init = NULL;
1264 nest = newCONDOP(
1265 0,
1266 cond,
1267 nest,
1268 NULL
1269 );
1270 }
1271
1272 *prelude_sentinel = op_append_list(
1273 OP_LINESEQ, *prelude_sentinel,
1274 nest
1275 );
c311cef3 1276 }
1277
e158cf8f 1278 /* named parameters */
1279 if (count_named_params(param_spec)) {
1280 int nameblock_ix;
1281 OP *nameblock;
1282 PADOFFSET vb, vc, vi, vk;
1283 const size_t pos = count_positional_params(param_spec);
1284
1285 nameblock = NULL;
1286 nameblock_ix = S_block_start(aTHX_ TRUE);
1287
1288 {
1289 OP *decl, *var;
1290
1291 decl = NULL;
1292
1293 if (!param_spec->named_required.used || !(spec->flags & FLAG_CHECK_NARGS)) {
1294 vb = 0;
1295 } else {
1296 var = newOP(OP_PADSV, OPf_MOD | (OPpLVAL_INTRO << 8));
1297 var->op_targ = vb = pad_add_name_pvs("$__B", 0, NULL, NULL);
1298 var = newASSIGNOP(OPf_STACKED, var, 0, newSVOP(OP_CONST, 0, newSVpvs("")));
1299 decl = op_append_list(OP_LINESEQ, decl, newSTATEOP(0, NULL, var));
1300 }
1301
1302 if (!param_spec->named_optional.used) {
1303 vc = 0;
1304 } else {
1305 var = newOP(OP_PADSV, OPf_MOD | (OPpLVAL_INTRO << 8));
1306 var->op_targ = vc = pad_add_name_pvs("$__C", 0, NULL, NULL);
1307 var = newASSIGNOP(OPf_STACKED, var, 0, newSVOP(OP_CONST, 0, newSVpvs("")));
1308 decl = op_append_list(OP_LINESEQ, decl, newSTATEOP(0, NULL, var));
1309 }
1310
1311 var = newOP(OP_PADSV, OPf_MOD | (OPpLVAL_INTRO << 8));
1312 var->op_targ = vk = pad_add_name_pvs("$__K", 0, NULL, NULL);
1313 decl = op_append_list(OP_LINESEQ, decl, newSTATEOP(0, NULL, var));
1314
1315 var = newOP(OP_PADSV, OPf_MOD | (OPpLVAL_INTRO << 8));
1316 var->op_targ = vi = pad_add_name_pvs("$__I", 0, NULL, NULL);
1317 var = newASSIGNOP(OPf_STACKED, var, 0, newSVOP(OP_CONST, 0, newSViv(pos)));
1318 decl = op_append_list(OP_LINESEQ, decl, newSTATEOP(0, NULL, var));
1319
1320 //S_intro_my(aTHX);
1321 nameblock = op_append_list(OP_LINESEQ, nameblock, decl);
1322 }
1323
1324 {
1325 OP *loop;
1326
1327 loop = NULL;
1328
1329 loop = op_append_list(
1330 OP_LINESEQ,
1331 loop,
1332 newSTATEOP(
1333 0, NULL,
1334 newASSIGNOP(
1335 OPf_STACKED,
1336 my_var(aTHX_ 0, vk),
1337 0,
1338 mkargselemv(aTHX_ vi)
1339 )
1340 )
1341 );
1342
1343 {
1344 OP *nest;
1345 size_t i;
1346
1347 if (param_spec->slurpy.name) {
1348 if (SvPV_nolen(param_spec->slurpy.name)[0] == '@') {
1349 OP *first, *mid, *last;
1350
1351 last = mkargselem(
1352 aTHX_
1353 newBINOP(
1354 OP_ADD, 0,
1355 my_var(aTHX_ 0, vi),
1356 newSVOP(OP_CONST, 0, newSViv(1))
1357 )
1358 );
1359 mid = last;
1360
1361 first = my_var(aTHX_ 0, vk);
1362 first->op_sibling = mid;
1363 mid = first;
1364
1365 first = my_var_g(aTHX_ OP_PADAV, 0, param_spec->slurpy.padoff);
1366 first->op_sibling = mid;
1367 mid = first;
1368
1369 first = newOP(OP_PUSHMARK, 0);
1370 nest = newLISTOP(OP_PUSH, 0, first, mid);
1371 nest->op_targ = pad_alloc(OP_PUSH, SVs_PADTMP);
1372 ((LISTOP *)nest)->op_last = last;
1373 } else {
1374 nest = newASSIGNOP(
1375 OPf_STACKED,
1376 newBINOP(
1377 OP_HELEM, 0,
1378 my_var_g(aTHX_ OP_PADHV, 0, param_spec->slurpy.padoff),
1379 my_var(aTHX_ 0, vk)
1380 ),
1381 0,
1382 mkargselem(
1383 aTHX_
1384 newBINOP(
1385 OP_ADD, 0,
1386 my_var(aTHX_ 0, vi),
1387 newSVOP(OP_CONST, 0, newSViv(1))
1388 )
1389 )
1390 );
1391 }
1392 } else if (spec->flags & FLAG_CHECK_NARGS) {
1393 OP *err, *croak;
1394
1395 err = newSVOP(OP_CONST, 0,
1396 newSVpvf("In %"SVf": No such named parameter: ", SVfARG(declarator)));
1397 err = newBINOP(
1398 OP_CONCAT, 0,
1399 err,
1400 my_var(aTHX_ 0, vk)
1401 );
1402
1403 croak = newCVREF(OPf_WANT_SCALAR,
1404 newGVOP(OP_GV, 0, gv_fetchpvs("Carp::croak", 0, SVt_PVCV)));
1405 nest = newUNOP(OP_ENTERSUB, OPf_STACKED,
1406 op_append_elem(OP_LIST, err, croak));
1407 } else {
1408 nest = NULL;
1409 }
1410
1411 for (i = param_spec->named_optional.used; i--; ) {
1412 Param *cur = &param_spec->named_optional.data[i].param;
1413 size_t dn;
1414 char *dp = SvPV(cur->name, dn);
1415 OP *vec;
1416
1417 if (!(spec->flags & FLAG_CHECK_NARGS)) {
1418 vec = NULL;
1419 } else {
1420 vec = newASSIGNOP(
1421 OPf_STACKED,
1422 mkvecbits(aTHX_ vc, i),
1423 0,
1424 newSVOP(OP_CONST, 0, newSViv(1))
1425 );
1426 }
1427
1428 nest = newCONDOP(
1429 0,
1430 newBINOP(
1431 OP_SEQ, 0,
1432 my_var(aTHX_ 0, vk),
1433 newSVOP(OP_CONST, 0, newSVpvn_utf8(dp + 1, dn - 1, SvUTF8(cur->name)))
1434 ),
1435 op_append_list(
1436 OP_LINESEQ,
1437 newASSIGNOP(
1438 OPf_STACKED,
1439 my_var(aTHX_ 0, cur->padoff),
1440 0,
1441 mkargselem(
1442 aTHX_
1443 newBINOP(
1444 OP_ADD, 0,
1445 my_var(aTHX_ 0, vi),
1446 newSVOP(OP_CONST, 0, newSViv(1))
1447 )
1448 )
1449 ),
1450 vec
1451 ),
1452 nest
1453 );
1454 }
1455
1456 for (i = param_spec->named_required.used; i--; ) {
1457 Param *cur = &param_spec->named_required.data[i];
1458 size_t dn;
1459 char *dp = SvPV(cur->name, dn);
1460 OP *vec;
1461
1462 if (!(spec->flags & FLAG_CHECK_NARGS)) {
1463 vec = NULL;
1464 } else {
1465 vec = newASSIGNOP(
1466 OPf_STACKED,
1467 mkvecbits(aTHX_ vb, i),
1468 0,
1469 newSVOP(OP_CONST, 0, newSViv(1))
1470 );
1471 }
1472
1473 nest = newCONDOP(
1474 0,
1475 newBINOP(
1476 OP_SEQ, 0,
1477 my_var(aTHX_ 0, vk),
1478 newSVOP(OP_CONST, 0, newSVpvn_utf8(dp + 1, dn - 1, SvUTF8(cur->name)))
1479 ),
1480 op_append_list(
1481 OP_LINESEQ,
1482 newASSIGNOP(
1483 OPf_STACKED,
1484 my_var(aTHX_ 0, cur->padoff),
1485 0,
1486 mkargselem(
1487 aTHX_
1488 newBINOP(
1489 OP_ADD, 0,
1490 my_var(aTHX_ 0, vi),
1491 newSVOP(OP_CONST, 0, newSViv(1))
1492 )
1493 )
1494 ),
1495 vec
1496 ),
1497 nest
1498 );
1499 }
1500
1501 loop = op_append_elem(OP_LINESEQ, loop, newSTATEOP(0, NULL, nest));
1502 }
1503
1504 loop = newWHILEOP(
1505 0, 1,
1506 NULL,
1507 newBINOP(
1508 OP_LT, 0,
1509 my_var(aTHX_ 0, vi),
1510 newAVREF(newGVOP(OP_GV, 0, PL_defgv))
1511 ),
1512 loop,
1513 newASSIGNOP(
1514 OPf_STACKED,
1515 my_var(aTHX_ 0, vi),
1516 OP_ADD,
1517 newSVOP(OP_CONST, 0, newSViv(2))
1518 ),
1519 0
1520 );
1521
1522 nameblock = op_append_list(OP_LINESEQ, nameblock, newSTATEOP(0, NULL, loop));
1523 }
1524
1525 if (param_spec->named_required.used && (spec->flags & FLAG_CHECK_NARGS)) {
1526 OP *cond, *err, *croak, *join;
1527
1528 {
1529 size_t i, lim;
1530 OP *first, *mid, *last;
1531
1532 last = newNULLLIST();
1533 mid = last;
1534
1535 for (i = param_spec->named_required.used; i--; ) {
1536 OP *cur;
1537 SV *sv = param_spec->named_required.data[i].name;
1538 size_t n;
1539 char *p = SvPV(sv, n);
1540 cur = newCONDOP(
1541 0,
1542 mkvecbits(aTHX_ vb, i),
1543 newNULLLIST(),
1544 newSVOP(OP_CONST, 0, newSVpvn_utf8(p + 1, n - 1, SvUTF8(sv)))
1545 );
1546 cur->op_sibling = mid;
1547 mid = cur;
1548 }
1549
1550 first = newSVOP(OP_CONST, 0, newSVpvs(", "));
1551 first->op_sibling = mid;
1552 mid = first;
1553
1554 first = newOP(OP_PUSHMARK, 0);
1555
1556 join = newLISTOP(OP_JOIN, 0, first, mid);
1557 join->op_targ = pad_alloc(OP_JOIN, SVs_PADTMP);
1558 ((LISTOP *)join)->op_last = last;
1559 }
1560
1561 err = newSVOP(
1562 OP_CONST, 0,
1563 newSVpvf("In %"SVf": Missing named parameter(s): ", SVfARG(declarator))
1564 );
1565 err = newBINOP(OP_CONCAT, 0, err, join);
1566 croak = newCVREF(
1567 OPf_WANT_SCALAR,
1568 newGVOP(OP_GV, 0, gv_fetchpvs("Carp::croak", 0, SVt_PVCV))
1569 );
1570 err = newUNOP(
1571 OP_ENTERSUB,
1572 OPf_STACKED,
1573 op_append_elem(OP_LIST, err, croak)
1574 );
1575 cond = newBINOP(
1576 OP_SNE, 0,
1577 my_var(aTHX_ 0, vb),
1578 newSVOP(OP_CONST, 0, mkbits1(aTHX_ param_spec->named_required.used))
1579 );
1580 err = newCONDOP(
1581 0,
1582 cond,
1583 err,
1584 NULL
1585 );
1586
1587 nameblock = op_append_list(OP_LINESEQ, nameblock, err);
1588 }
1589
1590 if (param_spec->named_optional.used) {
1591 size_t i, lim;
1592
1593 for (i = 0, lim = param_spec->named_optional.used; i < lim; i++) {
1594 ParamInit *const cur = &param_spec->named_optional.data[i];
1595 OP *init, *cond;
1596
1597 init = newASSIGNOP(
1598 OPf_STACKED,
1599 my_var(aTHX_ 0, cur->param.padoff),
1600 0,
1601 cur->init
1602 );
1603 cur->init = NULL;
1604
1605 cond = newUNOP(OP_NOT, OPf_SPECIAL, mkvecbits(aTHX_ vc, i));
1606
1607 init = newCONDOP(0, cond, init, NULL);
1608
1609 nameblock = op_append_list(OP_LINESEQ, nameblock, newSTATEOP(0, NULL, init));
1610 }
1611 }
1612
1613 nameblock = S_block_end(aTHX_ nameblock_ix, nameblock);
1614 nameblock = op_scope(nameblock);
1615
1616 *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, nameblock);
1617 }
1e0f1595 1618 }
c311cef3 1619
1e0f1595 1620 /* finally let perl parse the actual subroutine body */
1621 body = parse_block(0);
c311cef3 1622
1e0f1595 1623 /* add '();' to make function return nothing by default */
1624 /* (otherwise the invisible parameter initialization can "leak" into
1625 the return value: fun ($x) {}->("asdf", 0) == 2) */
1626 if (*prelude_sentinel) {
1627 body = newSTATEOP(0, NULL, body);
db81d362 1628 }
1629
1e0f1595 1630 body = op_append_list(OP_LINESEQ, *prelude_sentinel, body);
1631 *prelude_sentinel = NULL;
1632
c311cef3 1633 /* it's go time. */
1634 {
1635 OP *const attrs = *attrs_sentinel;
1636 *attrs_sentinel = NULL;
1637 SvREFCNT_inc_simple_void(PL_compcv);
1638
63915d26 1639 /* close outer block: '}' */
1640 S_block_end(aTHX_ save_ix, body);
1641
c311cef3 1642 if (!saw_name) {
1643 *pop = newANONATTRSUB(
1644 floor_ix,
1645 proto ? newSVOP(OP_CONST, 0, SvREFCNT_inc_simple_NN(proto)) : NULL,
1646 attrs,
1647 body
1648 );
1649 return KEYWORD_PLUGIN_EXPR;
1650 }
1651
1652 newATTRSUB(
1653 floor_ix,
1654 newSVOP(OP_CONST, 0, SvREFCNT_inc_simple_NN(saw_name)),
1655 proto ? newSVOP(OP_CONST, 0, SvREFCNT_inc_simple_NN(proto)) : NULL,
1656 attrs,
1657 body
1658 );
5efe0e0e 1659 *pop = newOP(OP_NULL, 0);
c311cef3 1660 return KEYWORD_PLUGIN_STMT;
db81d362 1661 }
db81d362 1662}
1663
1664static int my_keyword_plugin(pTHX_ char *keyword_ptr, STRLEN keyword_len, OP **op_ptr) {
63915d26 1665 KWSpec spec;
db81d362 1666 int ret;
1667
1668 SAVETMPS;
1669
7dd35535 1670 if (kw_flags(aTHX_ keyword_ptr, keyword_len, &spec)) {
1671 ret = parse_fun(aTHX_ op_ptr, keyword_ptr, keyword_len, &spec);
db81d362 1672 } else {
7dd35535 1673 ret = next_keyword_plugin(aTHX_ keyword_ptr, keyword_len, op_ptr);
db81d362 1674 }
1675
1676 FREETMPS;
1677
1678 return ret;
1679}
1680
1681WARNINGS_RESET
1682
1683MODULE = Function::Parameters PACKAGE = Function::Parameters
1684PROTOTYPES: ENABLE
1685
1686BOOT:
1687WARNINGS_ENABLE {
1688 HV *const stash = gv_stashpvs(MY_PKG, GV_ADD);
426a4d69 1689 /**/
d8e5d540 1690 newCONSTSUB(stash, "FLAG_NAME_OK", newSViv(FLAG_NAME_OK));
1691 newCONSTSUB(stash, "FLAG_ANON_OK", newSViv(FLAG_ANON_OK));
63915d26 1692 newCONSTSUB(stash, "FLAG_DEFAULT_ARGS", newSViv(FLAG_DEFAULT_ARGS));
d8e5d540 1693 newCONSTSUB(stash, "FLAG_CHECK_NARGS", newSViv(FLAG_CHECK_NARGS));
1694 newCONSTSUB(stash, "FLAG_INVOCANT", newSViv(FLAG_INVOCANT));
e158cf8f 1695 newCONSTSUB(stash, "FLAG_NAMED_PARAMS", newSViv(FLAG_NAMED_PARAMS));
db81d362 1696 newCONSTSUB(stash, "HINTK_KEYWORDS", newSVpvs(HINTK_KEYWORDS));
d8e5d540 1697 newCONSTSUB(stash, "HINTK_FLAGS_", newSVpvs(HINTK_FLAGS_));
1698 newCONSTSUB(stash, "HINTK_SHIFT_", newSVpvs(HINTK_SHIFT_));
1699 newCONSTSUB(stash, "HINTK_ATTRS_", newSVpvs(HINTK_ATTRS_));
426a4d69 1700 /**/
db81d362 1701 next_keyword_plugin = PL_keyword_plugin;
1702 PL_keyword_plugin = my_keyword_plugin;
1703} WARNINGS_RESET
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