2 Copyright 2012 Lukas Mai.
4 This program is free software; you can redistribute it and/or modify it
5 under the terms of either: the GNU General Public License as published
6 by the Free Software Foundation; or the Artistic License.
8 See http://dev.perl.org/licenses/ for more information.
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)
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) \
29 /* WARNINGS_ENABLEW(-Wshadow) :-( */ \
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)
40 #define WARNINGS_RESET
41 #define WARNINGS_ENABLE
45 #define PERL_NO_GET_CONTEXT
56 #define HAVE_PERL_VERSION(R, V, S) \
57 (PERL_REVISION > (R) || (PERL_REVISION == (R) && (PERL_VERSION > (V) || (PERL_VERSION == (V) && (PERL_SUBVERSION >= (S))))))
59 #if HAVE_PERL_VERSION(5, 16, 0)
60 #define IF_HAVE_PERL_5_16(YES, NO) YES
62 #define IF_HAVE_PERL_5_16(YES, NO) NO
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)
70 #elif HAVE_PERL_VERSION(5, 15, 6)
72 #elif HAVE_PERL_VERSION(5, 15, 5)
74 #elif HAVE_PERL_VERSION(5, 13, 0)
77 #error "internal error: missing definition of KEY_my (your perl is too old)"
82 #define MY_PKG "Function::Parameters"
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:"
89 #define DEFSTRUCT(T) typedef struct T T; struct T
94 FLAG_DEFAULT_ARGS = 0x04,
95 FLAG_CHECK_NARGS = 0x08,
97 FLAG_NAMED_PARAMS = 0x20
106 static int (*next_keyword_plugin)(pTHX_ char *, STRLEN, OP **);
108 static int kw_flags(pTHX_ const char *kw_ptr, STRLEN kw_len, KWSpec *spec) {
111 const char *p, *kw_active;
112 STRLEN kw_active_len;
115 spec->shift = sv_2mortal(newSVpvs(""));
116 spec->attrs = sv_2mortal(newSVpvs(""));
118 if (!(hints = GvHV(PL_hintgv))) {
121 if (!(psv = hv_fetchs(hints, HINTK_KEYWORDS, 0))) {
125 kw_active = SvPV(sv, kw_active_len);
126 if (kw_active_len <= kw_len) {
131 (p = strchr(p, *kw_ptr)) &&
132 p < kw_active + kw_active_len - kw_len;
136 (p == kw_active || p[-1] == ' ') &&
138 memcmp(kw_ptr, p, kw_len) == 0
141 #define FETCH_HINTK_INTO(NAME, PTR, LEN, X) STMT_START { \
142 const char *fk_ptr_; \
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_); \
153 FETCH_HINTK_INTO(FLAGS_, kw_ptr, kw_len, psv);
154 spec->flags = SvIV(*psv);
156 FETCH_HINTK_INTO(SHIFT_, kw_ptr, kw_len, psv);
157 SvSetSV(spec->shift, *psv);
159 FETCH_HINTK_INTO(ATTRS_, kw_ptr, kw_len, psv);
160 SvSetSV(spec->attrs, *psv);
162 #undef FETCH_HINTK_INTO
170 static void free_ptr_op(pTHX_ void *vp) {
176 #define sv_eq_pvs(SV, S) my_sv_eq_pvn(aTHX_ SV, "" S "", sizeof (S) - 1)
178 static int my_sv_eq_pvn(pTHX_ SV *sv, const char *p, STRLEN n) {
180 const char *sv_p = SvPV(sv, sv_len);
181 return memcmp(sv_p, p, n) == 0;
185 #include "padop_on_crack.c.inc"
189 MY_ATTR_LVALUE = 0x01,
190 MY_ATTR_METHOD = 0x02,
191 MY_ATTR_SPECIAL = 0x04
194 static void my_sv_cat_c(pTHX_ SV *sv, U32 c) {
195 char ds[UTF8_MAXBYTES + 1], *d;
196 d = uvchr_to_utf8(ds, c);
200 sv_catpvn(sv, ds, d - ds);
203 static 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);
209 static 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);
215 static SV *my_scan_word(pTHX_ bool allow_package) {
216 bool at_start, at_substart;
218 SV *sv = sv_2mortal(newSVpvs(""));
223 at_start = at_substart = TRUE;
224 c = lex_peek_unichar(0);
227 if (at_substart ? my_is_uni_xidfirst(aTHX_ c) : my_is_uni_xidcont(aTHX_ c)) {
229 my_sv_cat_c(aTHX_ sv, c);
231 c = lex_peek_unichar(0);
232 } else if (allow_package && !at_substart && c == '\'') {
234 c = lex_peek_unichar(0);
235 if (!my_is_uni_xidfirst(aTHX_ c)) {
236 lex_stuff_pvs("'", 0);
241 } else if (allow_package && (at_start || !at_substart) && c == ':') {
243 if (lex_peek_unichar(0) != ':') {
244 lex_stuff_pvs(":", 0);
248 c = lex_peek_unichar(0);
249 if (!my_is_uni_xidfirst(aTHX_ c)) {
250 lex_stuff_pvs("::", 0);
261 return SvCUR(sv) ? sv : NULL;
264 static SV *my_scan_parens_tail(pTHX_ bool keep_backslash) {
269 start = CopLINE(PL_curcop);
271 sv = sv_2mortal(newSVpvs(""));
278 c = lex_read_unichar(0);
280 CopLINE_set(PL_curcop, start);
285 c = lex_read_unichar(0);
287 CopLINE_set(PL_curcop, start);
290 if (keep_backslash || (c != '(' && c != ')')) {
293 } else if (c == '(') {
295 } else if (c == ')') {
302 my_sv_cat_c(aTHX_ sv, c);
308 static void my_check_prototype(pTHX_ const SV *declarator, SV *proto) {
309 char *start, *r, *w, *end;
313 start = SvPV(proto, len);
316 for (w = r = start; r < end; r++) {
322 SvCUR_set(proto, w - start);
326 if (!ckWARN(WARN_ILLEGALPROTO)) {
330 /* check for bad characters */
331 if (strspn(start, "$@%*;[]&\\_+") != len) {
332 SV *dsv = newSVpvs_flags("", SVs_TEMP);
334 packWARN(WARN_ILLEGALPROTO),
335 "Illegal character in prototype for %"SVf" : %s",
344 : pv_pretty(dsv, start, len, 60, NULL, NULL,
345 PERL_PV_ESCAPE_NONASCII
351 for (r = start; r < end; r++) {
355 packWARN(WARN_ILLEGALPROTO),
356 "Illegal character in prototype for %"SVf" : %s",
357 SVfARG(declarator), r
362 if (r[1] && !strchr(";@%", *r)) {
364 packWARN(WARN_ILLEGALPROTO),
365 "Illegal character after '_' in prototype for %"SVf" : %s",
366 SVfARG(declarator), r
376 packWARN(WARN_ILLEGALPROTO),
377 "prototype after '%c' for %"SVf": %s",
378 *r, SVfARG(declarator), r + 1
386 if (strchr("$@%&*", *r)) {
391 for (; r < end && *r != ']'; r++) {
392 if (!strchr("$@%&*", *r)) {
396 if (*r == ']' && r[-1] != '[') {
401 packWARN(WARN_ILLEGALPROTO),
402 "Illegal character after '\\' in prototype for %"SVf" : %s",
403 SVfARG(declarator), r
423 DEFSTRUCT(ParamInit) {
428 #define VEC(B) B ## _Vec
430 #define DEFVECTOR(B) DEFSTRUCT(VEC(B)) { \
436 DEFVECTOR(ParamInit);
438 #define DEFVECTOR_INIT(N, B) static void N(VEC(B) *p) { \
441 Newx(p->data, p->size, B); \
442 } static void N(VEC(B) *)
444 DEFSTRUCT(ParamSpec) {
446 VEC(Param) positional_required;
447 VEC(ParamInit) positional_optional;
448 VEC(Param) named_required;
449 VEC(ParamInit) named_optional;
453 DEFVECTOR_INIT(pv_init, Param);
454 DEFVECTOR_INIT(piv_init, ParamInit);
456 static void p_init(Param *p) {
458 p->padoff = NOT_IN_PAD;
461 static 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);
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); \
477 return &p->data[p->used]; \
478 } static B (*N(VEC(B) *))
480 DEFVECTOR_EXTEND(pv_extend, Param);
481 DEFVECTOR_EXTEND(piv_extend, ParamInit);
483 #define DEFVECTOR_CLEAR(N, B, F) static void N(pTHX_ VEC(B) *p) { \
486 F(aTHX_ &p->data[p->used]); \
491 } static void N(pTHX_ VEC(B) *)
493 static void p_clear(pTHX_ Param *p) {
495 p->padoff = NOT_IN_PAD;
498 static void pi_clear(pTHX_ ParamInit *pi) {
499 p_clear(aTHX_ &pi->param);
506 DEFVECTOR_CLEAR(pv_clear, Param, p_clear);
507 DEFVECTOR_CLEAR(piv_clear, ParamInit, pi_clear);
509 static void ps_clear(pTHX_ ParamSpec *ps) {
510 p_clear(aTHX_ &ps->invocant);
512 pv_clear(aTHX_ &ps->positional_required);
513 piv_clear(aTHX_ &ps->positional_optional);
515 pv_clear(aTHX_ &ps->named_required);
516 piv_clear(aTHX_ &ps->named_optional);
518 p_clear(aTHX_ &ps->slurpy);
521 static int ps_contains(pTHX_ const ParamSpec *ps, SV *sv) {
524 if (ps->invocant.name && sv_eq(sv, ps->invocant.name)) {
528 for (i = 0, lim = ps->positional_required.used; i < lim; i++) {
529 if (sv_eq(sv, ps->positional_required.data[i].name)) {
534 for (i = 0, lim = ps->positional_optional.used; i < lim; i++) {
535 if (sv_eq(sv, ps->positional_optional.data[i].param.name)) {
540 for (i = 0, lim = ps->named_required.used; i < lim; i++) {
541 if (sv_eq(sv, ps->named_required.data[i].name)) {
546 for (i = 0, lim = ps->named_optional.used; i < lim; i++) {
547 if (sv_eq(sv, ps->named_optional.data[i].param.name)) {
555 static void ps_free_void(pTHX_ void *p) {
560 static int args_min(pTHX_ const ParamSpec *ps, const KWSpec *ks) {
563 return SvTRUE(ks->shift) ? 1 : 0;
565 if (ps->invocant.name) {
568 n += ps->positional_required.used;
569 n += ps->named_required.used * 2;
573 static int args_max(const ParamSpec *ps) {
578 if (ps->invocant.name) {
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) {
589 static size_t count_positional_params(const ParamSpec *ps) {
590 return ps->positional_required.used + ps->positional_optional.used;
593 static size_t count_named_params(const ParamSpec *ps) {
594 return ps->named_required.used + ps->named_optional.used;
598 PARAM_INVOCANT = 0x01,
602 /* *pinit must be NULL on entry.
603 * caller must free *pinit on error.
605 static PADOFFSET parse_param(
607 const SV *declarator, const KWSpec *spec, ParamSpec *param_spec,
608 int *pflags, SV **pname, OP **pinit
617 c = lex_peek_unichar(0);
623 *pflags |= PARAM_NAMED;
625 c = lex_peek_unichar(0);
629 croak("In %"SVf": unterminated parameter list", SVfARG(declarator));
631 if (!(c == '$' || c == '@' || c == '%')) {
632 croak("In %"SVf": unexpected '%c' in parameter list (expecting a sigil)", SVfARG(declarator), (int)c);
640 if (!(name = my_scan_word(aTHX_ FALSE))) {
641 croak("In %"SVf": missing identifier after '%c'", SVfARG(declarator), sigil);
643 sv_insert(name, 0, 0, &sigil, 1);
647 c = lex_peek_unichar(0);
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);
659 *pinit = parse_termexpr(0);
662 c = lex_peek_unichar(0);
666 *pflags |= PARAM_INVOCANT;
669 } else if (c == ',') {
672 } else if (c != ')') {
674 croak("In %"SVf": unterminated parameter list", SVfARG(declarator));
676 croak("In %"SVf": unexpected '%c' in parameter list (expecting ',')", SVfARG(declarator), (int)c);
679 return pad_add_name_sv(*pname, IF_HAVE_PERL_5_16(padadd_NO_DUP_CHECK, 0), NULL, NULL);
682 static OP *my_var_g(pTHX_ I32 type, I32 flags, PADOFFSET padoff) {
683 OP *var = newOP(type, flags);
684 var->op_targ = padoff;
688 static OP *my_var(pTHX_ I32 flags, PADOFFSET padoff) {
689 return my_var_g(aTHX_ OP_PADSV, flags, padoff);
692 static 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;
700 *p++ = (1u << bits) - 1;
703 SvCUR_set(sv, p - q);
708 static OP *mkvecbits(pTHX_ PADOFFSET padoff, size_t i) {
709 OP *first, *mid, *last, *vec;
711 last = newSVOP(OP_CONST, 0, newSViv(1));
714 mid = newSVOP(OP_CONST, 0, newSViv(i));
715 mid->op_sibling = first;
718 mid = my_var(aTHX_ 0, padoff);
719 mid->op_sibling = first;
721 first = newOP(OP_PUSHMARK, 0);
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);
731 static OP *mkargselem(pTHX_ OP *index) {
732 OP *args = newAVREF(newGVOP(OP_GV, 0, PL_defgv));
733 args->op_flags |= OPf_REF;
735 return newBINOP(OP_AELEM, 0, args, index);
738 static OP *mkargselemv(pTHX_ PADOFFSET v) {
739 return mkargselem(aTHX_ my_var(aTHX_ 0, v));
742 static int parse_fun(pTHX_ OP **pop, const char *keyword_ptr, STRLEN keyword_len, const KWSpec *spec) {
743 ParamSpec *param_spec;
748 OP **prelude_sentinel;
750 OP **attrs_sentinel, *body;
751 unsigned builtin_attrs;
754 declarator = sv_2mortal(newSVpvn(keyword_ptr, keyword_len));
762 if ((spec->flags & FLAG_NAME_OK) && (saw_name = my_scan_word(aTHX_ TRUE))) {
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));
769 sv_catpvs(declarator, " ");
770 sv_catsv(declarator, saw_name);
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")
779 builtin_attrs |= MY_ATTR_SPECIAL;
783 } else if (!(spec->flags & FLAG_ANON_OK)) {
784 croak("I was expecting a function name, not \"%.*s\"", (int)(PL_parser->bufend - PL_parser->bufptr), PL_parser->bufptr);
786 sv_catpvs(declarator, " (anon)");
789 /* we're a subroutine declaration */
790 floor_ix = start_subparse(FALSE, saw_name ? 0 : CVf_ANON);
791 SAVEFREESV(PL_compcv);
793 /* create outer block: '{' */
794 save_ix = S_block_start(aTHX_ TRUE);
796 /* initialize synthetic optree */
797 Newx(prelude_sentinel, 1, OP *);
798 *prelude_sentinel = NULL;
799 SAVEDESTRUCTOR_X(free_ptr_op, prelude_sentinel);
804 c = lex_peek_unichar(0);
808 Newx(init_sentinel, 1, OP *);
809 *init_sentinel = NULL;
810 SAVEDESTRUCTOR_X(free_ptr_op, init_sentinel);
812 Newx(param_spec, 1, ParamSpec);
814 SAVEDESTRUCTOR_X(ps_free_void, param_spec);
819 while ((c = lex_peek_unichar(0)) != ')') {
825 padoff = parse_param(aTHX_ declarator, spec, param_spec, &flags, &name, init_sentinel);
829 sigil = SvPV_nolen(name)[0];
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));
837 croak("In %"SVf": named parameter %"SVf" can't be a%s", SVfARG(declarator), SVfARG(name), sigil == '@' ? "n array" : " hash");
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));
844 croak("In %"SVf": invocant %"SVf" can't be a%s", SVfARG(declarator), SVfARG(name), sigil == '@' ? "n array" : " hash");
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));
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));
855 assert(!*init_sentinel);
856 param_spec->slurpy.name = name;
857 param_spec->slurpy.padoff = padoff;
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));
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));
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));
872 if (!(spec->flags & FLAG_INVOCANT)) {
873 croak("In %"SVf": invocant %"SVf" not allowed here", SVfARG(declarator), SVfARG(name));
875 param_spec->invocant.name = name;
876 param_spec->invocant.padoff = padoff;
880 if (*init_sentinel && !(spec->flags & FLAG_DEFAULT_ARGS)) {
881 croak("In %"SVf": default argument for %"SVf" not allowed here", SVfARG(declarator), SVfARG(name));
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));
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));
893 if (*init_sentinel) {
894 ParamInit *pi = piv_extend(¶m_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++;
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));
905 Param *p = pv_extend(¶m_spec->named_required);
908 param_spec->named_required.used++;
911 if (*init_sentinel || param_spec->positional_optional.used) {
912 ParamInit *pi = piv_extend(¶m_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++;
919 Param *p = pv_extend(¶m_spec->positional_required);
922 param_spec->positional_required.used++;
929 *init_sentinel = NULL;
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));
936 param_spec->invocant.name = spec->shift;
937 param_spec->invocant.padoff = pad_add_name_sv(param_spec->invocant.name, 0, NULL, NULL);
943 c = lex_peek_unichar(0);
948 c = lex_peek_unichar(0);
950 lex_stuff_pvs(":", 0);
954 if (!(proto = my_scan_parens_tail(aTHX_ FALSE))) {
955 croak("In %"SVf": prototype not terminated", SVfARG(declarator));
957 my_check_prototype(aTHX_ declarator, proto);
959 c = lex_peek_unichar(0);
964 Newx(attrs_sentinel, 1, OP *);
965 *attrs_sentinel = NULL;
966 SAVEDESTRUCTOR_X(free_ptr_op, attrs_sentinel);
968 if (c == ':' || c == '{') /* '}' - hi, vim */ {
970 /* kludge default attributes in */
971 if (SvTRUE(spec->attrs) && SvPV_nolen(spec->attrs)[0] == ':') {
972 lex_stuff_sv(spec->attrs, 0);
979 c = lex_peek_unichar(0);
984 if (!(attr = my_scan_word(aTHX_ FALSE))) {
989 c = lex_peek_unichar(0);
992 if (sv_eq_pvs(attr, "lvalue")) {
993 builtin_attrs |= MY_ATTR_LVALUE;
995 } else if (sv_eq_pvs(attr, "method")) {
996 builtin_attrs |= MY_ATTR_METHOD;
1001 lex_read_unichar(0);
1002 if (!(sv = my_scan_parens_tail(aTHX_ TRUE))) {
1003 croak("In %"SVf": unterminated attribute parameter in attribute list", SVfARG(declarator));
1005 sv_catpvs(attr, "(");
1007 sv_catpvs(attr, ")");
1010 c = lex_peek_unichar(0);
1014 *attrs_sentinel = op_append_elem(OP_LIST, *attrs_sentinel, newSVOP(OP_CONST, 0, SvREFCNT_inc_simple_NN(attr)));
1018 lex_read_unichar(0);
1020 c = lex_peek_unichar(0);
1027 if (c != '{') /* '}' - hi, vim */ {
1028 croak("In %"SVf": I was expecting a function body, not \"%c\"", SVfARG(declarator), (int)c);
1031 /* surprise predeclaration! */
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);
1038 SvREFCNT_inc_simple_void(PL_compcv);
1042 newSVOP(OP_CONST, 0, SvREFCNT_inc_simple_NN(saw_name)),
1043 proto ? newSVOP(OP_CONST, 0, SvREFCNT_inc_simple_NN(proto)) : NULL,
1049 if (builtin_attrs & MY_ATTR_LVALUE) {
1050 CvLVALUE_on(PL_compcv);
1052 if (builtin_attrs & MY_ATTR_METHOD) {
1053 CvMETHOD_on(PL_compcv);
1055 if (builtin_attrs & MY_ATTR_SPECIAL) {
1056 CvSPECIAL_on(PL_compcv);
1059 /* check number of arguments */
1060 if (spec->flags & FLAG_CHECK_NARGS) {
1064 amin = args_min(aTHX_ param_spec, spec);
1066 OP *chk, *cond, *err, *croak;
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,
1072 newAVREF(newGVOP(OP_GV, 0, PL_defgv)));
1073 err = newBINOP(OP_CONCAT, 0,
1075 newSVOP(OP_CONST, 0, newSVpvs(")")));
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));
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);
1087 *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, newSTATEOP(0, NULL, chk));
1090 amax = args_max(param_spec);
1092 OP *chk, *cond, *err, *croak;
1094 err = newSVOP(OP_CONST, 0,
1095 newSVpvf("Too many arguments for %"SVf" (expected %d, got ", SVfARG(declarator), amax));
1096 err = newBINOP(OP_CONCAT, 0,
1098 newAVREF(newGVOP(OP_GV, 0, PL_defgv)));
1099 err = newBINOP(OP_CONCAT, 0,
1101 newSVOP(OP_CONST, 0, newSVpvs(")")));
1103 croak = newCVREF(OPf_WANT_SCALAR,
1104 newGVOP(OP_GV, 0, gv_fetchpvs("Carp::croak", 0, SVt_PVCV)));
1105 err = newUNOP(OP_ENTERSUB, OPf_STACKED,
1106 op_append_elem(OP_LIST, err, croak));
1108 cond = newBINOP(OP_GT, 0,
1109 newAVREF(newGVOP(OP_GV, 0, PL_defgv)),
1110 newSVOP(OP_CONST, 0, newSViv(amax)));
1111 chk = newLOGOP(OP_AND, 0, cond, err);
1113 *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, newSTATEOP(0, NULL, chk));
1116 if (param_spec && (count_named_params(param_spec) || (param_spec->slurpy.name && SvPV_nolen(param_spec->slurpy.name)[0] == '%'))) {
1117 OP *chk, *cond, *err, *croak;
1118 const UV fixed = count_positional_params(param_spec) + !!param_spec->invocant.name;
1120 err = newSVOP(OP_CONST, 0,
1121 newSVpvf("Odd number of paired arguments for %"SVf"", SVfARG(declarator)));
1123 croak = newCVREF(OPf_WANT_SCALAR,
1124 newGVOP(OP_GV, 0, gv_fetchpvs("Carp::croak", 0, SVt_PVCV)));
1125 err = newUNOP(OP_ENTERSUB, OPf_STACKED,
1126 op_append_elem(OP_LIST, err, croak));
1128 cond = newBINOP(OP_GT, 0,
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,
1137 newBINOP(OP_MODULO, 0,
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))));
1144 chk = newLOGOP(OP_AND, 0, cond, err);
1146 *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, newSTATEOP(0, NULL, chk));
1151 /* my $invocant = shift; */
1152 if (SvTRUE(spec->shift)) {
1157 OPf_MOD | (OPpLVAL_INTRO << 8),
1158 pad_add_name_sv(spec->shift, 0, NULL, NULL)
1160 var = newASSIGNOP(OPf_STACKED, var, 0, newOP(OP_SHIFT, 0));
1162 *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, newSTATEOP(0, NULL, var));
1165 /* my $invocant = shift; */
1166 if (param_spec->invocant.name) {
1171 OPf_MOD | (OPpLVAL_INTRO << 8),
1172 param_spec->invocant.padoff
1174 var = newASSIGNOP(OPf_STACKED, var, 0, newOP(OP_SHIFT, 0));
1176 *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, newSTATEOP(0, NULL, var));
1179 /* my (...) = @_; */
1186 for (i = 0, lim = param_spec->positional_required.used; i < lim; i++) {
1187 OP *const var = my_var(
1189 OPf_WANT_LIST | (OPpLVAL_INTRO << 8),
1190 param_spec->positional_required.data[i].padoff
1192 lhs = op_append_elem(OP_LIST, lhs, var);
1195 for (i = 0, lim = param_spec->positional_optional.used; i < lim; i++) {
1196 OP *const var = my_var(
1198 OPf_WANT_LIST | (OPpLVAL_INTRO << 8),
1199 param_spec->positional_optional.data[i].param.padoff
1201 lhs = op_append_elem(OP_LIST, lhs, var);
1204 if (param_spec->slurpy.name) {
1205 if (count_named_params(param_spec)) {
1206 OP *const var = my_var_g(
1208 SvPV_nolen(param_spec->slurpy.name)[0] == '@' ? OP_PADAV : OP_PADHV,
1209 OPf_MOD | (OPpLVAL_INTRO << 8),
1210 param_spec->slurpy.padoff
1212 *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, newSTATEOP(0, NULL, var));
1214 OP *const var = my_var_g(
1216 SvPV_nolen(param_spec->slurpy.name)[0] == '@' ? OP_PADAV : OP_PADHV,
1217 OPf_WANT_LIST | (OPpLVAL_INTRO << 8),
1218 param_spec->slurpy.padoff
1220 lhs = op_append_elem(OP_LIST, lhs, var);
1226 lhs->op_flags |= OPf_PARENS;
1227 rhs = newAVREF(newGVOP(OP_GV, 0, PL_defgv));
1229 *prelude_sentinel = op_append_list(
1230 OP_LINESEQ, *prelude_sentinel,
1233 newASSIGNOP(OPf_STACKED, lhs, 0, rhs)
1239 /* default arguments */
1246 req = param_spec->positional_required.used;
1247 for (i = 0, lim = param_spec->positional_optional.used; i < lim; i++) {
1248 ParamInit *cur = ¶m_spec->positional_optional.data[i];
1253 newAVREF(newGVOP(OP_GV, 0, PL_defgv)),
1254 newSVOP(OP_CONST, 0, newSViv(req + i + 1))
1257 var = my_var(aTHX_ 0, cur->param.padoff);
1259 nest = op_append_list(
1261 newASSIGNOP(OPf_STACKED, var, 0, cur->init)
1272 *prelude_sentinel = op_append_list(
1273 OP_LINESEQ, *prelude_sentinel,
1278 /* named parameters */
1279 if (count_named_params(param_spec)) {
1282 PADOFFSET vb, vc, vi, vk;
1283 const size_t pos = count_positional_params(param_spec);
1286 nameblock_ix = S_block_start(aTHX_ TRUE);
1293 if (!param_spec->named_required.used || !(spec->flags & FLAG_CHECK_NARGS)) {
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));
1302 if (!param_spec->named_optional.used) {
1305 var = newOP(OP_PADSV, OPf_MOD | (OPpLVAL_INTRO << 8));
1306 var->op_targ = vc = pad_add_name_pvs("$__C", 0, NULL, NULL);
1307 var = newASSIGNOP(OPf_STACKED, var, 0, newSVOP(OP_CONST, 0, newSVpvs("")));
1308 decl = op_append_list(OP_LINESEQ, decl, newSTATEOP(0, NULL, var));
1311 var = newOP(OP_PADSV, OPf_MOD | (OPpLVAL_INTRO << 8));
1312 var->op_targ = vk = pad_add_name_pvs("$__K", 0, NULL, NULL);
1313 decl = op_append_list(OP_LINESEQ, decl, newSTATEOP(0, NULL, var));
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));
1321 nameblock = op_append_list(OP_LINESEQ, nameblock, decl);
1329 loop = op_append_list(
1336 my_var(aTHX_ 0, vk),
1338 mkargselemv(aTHX_ vi)
1347 if (param_spec->slurpy.name) {
1348 if (SvPV_nolen(param_spec->slurpy.name)[0] == '@') {
1349 OP *first, *mid, *last;
1355 my_var(aTHX_ 0, vi),
1356 newSVOP(OP_CONST, 0, newSViv(1))
1361 first = my_var(aTHX_ 0, vk);
1362 first->op_sibling = mid;
1365 first = my_var_g(aTHX_ OP_PADAV, 0, param_spec->slurpy.padoff);
1366 first->op_sibling = mid;
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;
1378 my_var_g(aTHX_ OP_PADHV, 0, param_spec->slurpy.padoff),
1386 my_var(aTHX_ 0, vi),
1387 newSVOP(OP_CONST, 0, newSViv(1))
1392 } else if (spec->flags & FLAG_CHECK_NARGS) {
1395 err = newSVOP(OP_CONST, 0,
1396 newSVpvf("In %"SVf": No such named parameter: ", SVfARG(declarator)));
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));
1411 for (i = param_spec->named_optional.used; i--; ) {
1412 Param *cur = ¶m_spec->named_optional.data[i].param;
1414 char *dp = SvPV(cur->name, dn);
1417 if (!(spec->flags & FLAG_CHECK_NARGS)) {
1422 mkvecbits(aTHX_ vc, i),
1424 newSVOP(OP_CONST, 0, newSViv(1))
1432 my_var(aTHX_ 0, vk),
1433 newSVOP(OP_CONST, 0, newSVpvn_utf8(dp + 1, dn - 1, SvUTF8(cur->name)))
1439 my_var(aTHX_ 0, cur->padoff),
1445 my_var(aTHX_ 0, vi),
1446 newSVOP(OP_CONST, 0, newSViv(1))
1456 for (i = param_spec->named_required.used; i--; ) {
1457 Param *cur = ¶m_spec->named_required.data[i];
1459 char *dp = SvPV(cur->name, dn);
1462 if (!(spec->flags & FLAG_CHECK_NARGS)) {
1467 mkvecbits(aTHX_ vb, i),
1469 newSVOP(OP_CONST, 0, newSViv(1))
1477 my_var(aTHX_ 0, vk),
1478 newSVOP(OP_CONST, 0, newSVpvn_utf8(dp + 1, dn - 1, SvUTF8(cur->name)))
1484 my_var(aTHX_ 0, cur->padoff),
1490 my_var(aTHX_ 0, vi),
1491 newSVOP(OP_CONST, 0, newSViv(1))
1501 loop = op_append_elem(OP_LINESEQ, loop, newSTATEOP(0, NULL, nest));
1509 my_var(aTHX_ 0, vi),
1510 newAVREF(newGVOP(OP_GV, 0, PL_defgv))
1515 my_var(aTHX_ 0, vi),
1517 newSVOP(OP_CONST, 0, newSViv(2))
1522 nameblock = op_append_list(OP_LINESEQ, nameblock, newSTATEOP(0, NULL, loop));
1525 if (param_spec->named_required.used && (spec->flags & FLAG_CHECK_NARGS)) {
1526 OP *cond, *err, *croak, *join;
1530 OP *first, *mid, *last;
1532 last = newNULLLIST();
1535 for (i = param_spec->named_required.used; i--; ) {
1537 SV *sv = param_spec->named_required.data[i].name;
1539 char *p = SvPV(sv, n);
1542 mkvecbits(aTHX_ vb, i),
1544 newSVOP(OP_CONST, 0, newSVpvn_utf8(p + 1, n - 1, SvUTF8(sv)))
1546 cur->op_sibling = mid;
1550 first = newSVOP(OP_CONST, 0, newSVpvs(", "));
1551 first->op_sibling = mid;
1554 first = newOP(OP_PUSHMARK, 0);
1556 join = newLISTOP(OP_JOIN, 0, first, mid);
1557 join->op_targ = pad_alloc(OP_JOIN, SVs_PADTMP);
1558 ((LISTOP *)join)->op_last = last;
1563 newSVpvf("In %"SVf": Missing named parameter(s): ", SVfARG(declarator))
1565 err = newBINOP(OP_CONCAT, 0, err, join);
1568 newGVOP(OP_GV, 0, gv_fetchpvs("Carp::croak", 0, SVt_PVCV))
1573 op_append_elem(OP_LIST, err, croak)
1577 my_var(aTHX_ 0, vb),
1578 newSVOP(OP_CONST, 0, mkbits1(aTHX_ param_spec->named_required.used))
1587 nameblock = op_append_list(OP_LINESEQ, nameblock, err);
1590 if (param_spec->named_optional.used) {
1593 for (i = 0, lim = param_spec->named_optional.used; i < lim; i++) {
1594 ParamInit *const cur = ¶m_spec->named_optional.data[i];
1599 my_var(aTHX_ 0, cur->param.padoff),
1605 cond = newUNOP(OP_NOT, OPf_SPECIAL, mkvecbits(aTHX_ vc, i));
1607 init = newCONDOP(0, cond, init, NULL);
1609 nameblock = op_append_list(OP_LINESEQ, nameblock, newSTATEOP(0, NULL, init));
1613 nameblock = S_block_end(aTHX_ nameblock_ix, nameblock);
1614 nameblock = op_scope(nameblock);
1616 *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, nameblock);
1620 /* finally let perl parse the actual subroutine body */
1621 body = parse_block(0);
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);
1630 body = op_append_list(OP_LINESEQ, *prelude_sentinel, body);
1631 *prelude_sentinel = NULL;
1635 OP *const attrs = *attrs_sentinel;
1636 *attrs_sentinel = NULL;
1637 SvREFCNT_inc_simple_void(PL_compcv);
1639 /* close outer block: '}' */
1640 S_block_end(aTHX_ save_ix, body);
1643 *pop = newANONATTRSUB(
1645 proto ? newSVOP(OP_CONST, 0, SvREFCNT_inc_simple_NN(proto)) : NULL,
1649 return KEYWORD_PLUGIN_EXPR;
1654 newSVOP(OP_CONST, 0, SvREFCNT_inc_simple_NN(saw_name)),
1655 proto ? newSVOP(OP_CONST, 0, SvREFCNT_inc_simple_NN(proto)) : NULL,
1659 *pop = newOP(OP_NULL, 0);
1660 return KEYWORD_PLUGIN_STMT;
1664 static int my_keyword_plugin(pTHX_ char *keyword_ptr, STRLEN keyword_len, OP **op_ptr) {
1670 if (kw_flags(aTHX_ keyword_ptr, keyword_len, &spec)) {
1671 ret = parse_fun(aTHX_ op_ptr, keyword_ptr, keyword_len, &spec);
1673 ret = next_keyword_plugin(aTHX_ keyword_ptr, keyword_len, op_ptr);
1683 MODULE = Function::Parameters PACKAGE = Function::Parameters
1688 HV *const stash = gv_stashpvs(MY_PKG, GV_ADD);
1690 newCONSTSUB(stash, "FLAG_NAME_OK", newSViv(FLAG_NAME_OK));
1691 newCONSTSUB(stash, "FLAG_ANON_OK", newSViv(FLAG_ANON_OK));
1692 newCONSTSUB(stash, "FLAG_DEFAULT_ARGS", newSViv(FLAG_DEFAULT_ARGS));
1693 newCONSTSUB(stash, "FLAG_CHECK_NARGS", newSViv(FLAG_CHECK_NARGS));
1694 newCONSTSUB(stash, "FLAG_INVOCANT", newSViv(FLAG_INVOCANT));
1695 newCONSTSUB(stash, "FLAG_NAMED_PARAMS", newSViv(FLAG_NAMED_PARAMS));
1696 newCONSTSUB(stash, "HINTK_KEYWORDS", newSVpvs(HINTK_KEYWORDS));
1697 newCONSTSUB(stash, "HINTK_FLAGS_", newSVpvs(HINTK_FLAGS_));
1698 newCONSTSUB(stash, "HINTK_SHIFT_", newSVpvs(HINTK_SHIFT_));
1699 newCONSTSUB(stash, "HINTK_ATTRS_", newSVpvs(HINTK_ATTRS_));
1701 next_keyword_plugin = PL_keyword_plugin;
1702 PL_keyword_plugin = my_keyword_plugin;