/*
Copyright 2012 Lukas Mai.
This program is free software; you can redistribute it and/or modify it
under the terms of either: the GNU General Public License as published
by the Free Software Foundation; or the Artistic License.
See http://dev.perl.org/licenses/ for more information.
*/
#ifdef __GNUC__
#if (__GNUC__ == 4 && __GNUC_MINOR__ >= 6) || __GNUC__ >= 5
#define PRAGMA_GCC_(X) _Pragma(#X)
#define PRAGMA_GCC(X) PRAGMA_GCC_(GCC X)
#endif
#endif
#ifndef PRAGMA_GCC
#define PRAGMA_GCC(X)
#endif
#ifdef DEVEL
#define WARNINGS_RESET PRAGMA_GCC(diagnostic pop)
#define WARNINGS_ENABLEW(X) PRAGMA_GCC(diagnostic warning #X)
#define WARNINGS_ENABLE \
WARNINGS_ENABLEW(-Wall) \
WARNINGS_ENABLEW(-Wextra) \
WARNINGS_ENABLEW(-Wundef) \
/* WARNINGS_ENABLEW(-Wshadow) :-( */ \
WARNINGS_ENABLEW(-Wbad-function-cast) \
WARNINGS_ENABLEW(-Wcast-align) \
WARNINGS_ENABLEW(-Wwrite-strings) \
/* WARNINGS_ENABLEW(-Wnested-externs) wtf? */ \
WARNINGS_ENABLEW(-Wstrict-prototypes) \
WARNINGS_ENABLEW(-Wmissing-prototypes) \
WARNINGS_ENABLEW(-Winline) \
WARNINGS_ENABLEW(-Wdisabled-optimization)
#else
#define WARNINGS_RESET
#define WARNINGS_ENABLE
#endif
#define PERL_NO_GET_CONTEXT
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#include <string.h>
WARNINGS_ENABLE
#define HAVE_PERL_VERSION(R, V, S) \
(PERL_REVISION > (R) || (PERL_REVISION == (R) && (PERL_VERSION > (V) || (PERL_VERSION == (V) && (PERL_SUBVERSION >= (S))))))
#if HAVE_PERL_VERSION(5, 16, 0)
#define IF_HAVE_PERL_5_16(YES, NO) YES
#else
#define IF_HAVE_PERL_5_16(YES, NO) NO
#endif
#if 0
#if HAVE_PERL_VERSION(5, 17, 6)
#error "internal error: missing definition of KEY_my (your perl is too new)"
#elif HAVE_PERL_VERSION(5, 15, 8)
#define S_KEY_my 134
#elif HAVE_PERL_VERSION(5, 15, 6)
#define S_KEY_my 133
#elif HAVE_PERL_VERSION(5, 15, 5)
#define S_KEY_my 132
#elif HAVE_PERL_VERSION(5, 13, 0)
#define S_KEY_my 131
#else
#error "internal error: missing definition of KEY_my (your perl is too old)"
#endif
#endif
#define MY_PKG "Function::Parameters"
#define HINTK_KEYWORDS MY_PKG "/keywords"
#define HINTK_FLAGS_ MY_PKG "/flags:"
#define HINTK_SHIFT_ MY_PKG "/shift:"
#define HINTK_ATTRS_ MY_PKG "/attrs:"
#define DEFSTRUCT(T) typedef struct T T; struct T
#define UV_BITS (sizeof (UV) * CHAR_BIT)
enum {
FLAG_NAME_OK = 0x01,
FLAG_ANON_OK = 0x02,
FLAG_DEFAULT_ARGS = 0x04,
FLAG_CHECK_NARGS = 0x08,
FLAG_INVOCANT = 0x10,
FLAG_NAMED_PARAMS = 0x20,
FLAG_TYPES_OK = 0x40,
FLAG_CHECK_TARGS = 0x80
};
DEFSTRUCT(KWSpec) {
unsigned flags;
SV *shift;
SV *attrs;
};
static int (*next_keyword_plugin)(pTHX_ char *, STRLEN, OP **);
DEFSTRUCT(Resource) {
Resource *next;
void *data;
void (*destroy)(pTHX_ void *);
};
typedef Resource *Sentinel[1];
static void sentinel_clear_void(pTHX_ void *p) {
Resource **pp = p;
while (*pp) {
Resource *cur = *pp;
if (cur->destroy) {
cur->destroy(aTHX_ cur->data);
}
cur->data = (void *)"no";
cur->destroy = NULL;
*pp = cur->next;
Safefree(cur);
}
}
static Resource *sentinel_register(Sentinel sen, void *data, void (*destroy)(pTHX_ void *)) {
Resource *cur;
Newx(cur, 1, Resource);
cur->data = data;
cur->destroy = destroy;
cur->next = *sen;
*sen = cur;
return cur;
}
static void sentinel_disarm(Resource *p) {
p->destroy = NULL;
}
static void my_sv_refcnt_dec_void(pTHX_ void *p) {
SV *sv = p;
SvREFCNT_dec(sv);
}
static SV *sentinel_mortalize(Sentinel sen, SV *sv) {
sentinel_register(sen, sv, my_sv_refcnt_dec_void);
return sv;
}
#if HAVE_PERL_VERSION(5, 17, 2)
#define MY_OP_SLABBED(O) ((O)->op_slabbed)
#else
#define MY_OP_SLABBED(O) 0
#endif
DEFSTRUCT(OpGuard) {
OP *op;
bool needs_freed;
};
static void op_guard_init(OpGuard *p) {
p->op = NULL;
p->needs_freed = FALSE;
}
static OpGuard op_guard_transfer(OpGuard *p) {
OpGuard r = *p;
op_guard_init(p);
return r;
}
static OP *op_guard_relinquish(OpGuard *p) {
OP *o = p->op;
op_guard_init(p);
return o;
}
static void op_guard_update(OpGuard *p, OP *o) {
p->op = o;
p->needs_freed = o && !MY_OP_SLABBED(o);
}
static void op_guard_clear(pTHX_ OpGuard *p) {
if (p->needs_freed) {
op_free(p->op);
}
}
static void free_op_guard_void(pTHX_ void *vp) {
OpGuard *p = vp;
op_guard_clear(aTHX_ p);
Safefree(p);
}
static void free_op_void(pTHX_ void *vp) {
OP *p = vp;
op_free(p);
}
#define sv_eq_pvs(SV, S) my_sv_eq_pvn(aTHX_ SV, "" S "", sizeof (S) - 1)
static int my_sv_eq_pvn(pTHX_ SV *sv, const char *p, STRLEN n) {
STRLEN sv_len;
const char *sv_p = SvPV(sv, sv_len);
return memcmp(sv_p, p, n) == 0;
}
#include "padop_on_crack.c.inc"
enum {
MY_ATTR_LVALUE = 0x01,
MY_ATTR_METHOD = 0x02,
MY_ATTR_SPECIAL = 0x04
};
static void my_sv_cat_c(pTHX_ SV *sv, U32 c) {
char ds[UTF8_MAXBYTES + 1], *d;
d = (char *)uvchr_to_utf8((U8 *)ds, c);
if (d - ds > 1) {
sv_utf8_upgrade(sv);
}
sv_catpvn(sv, ds, d - ds);
}
#define MY_UNI_IDFIRST(C) isIDFIRST_uni(C)
#define MY_UNI_IDCONT(C) isALNUM_uni(C)
static SV *my_scan_word(pTHX_ Sentinel sen, bool allow_package) {
bool at_start, at_substart;
I32 c;
SV *sv = sentinel_mortalize(sen, newSVpvs(""));
if (lex_bufutf8()) {
SvUTF8_on(sv);
}
at_start = at_substart = TRUE;
c = lex_peek_unichar(0);
while (c != -1) {
if (at_substart ? MY_UNI_IDFIRST(c) : MY_UNI_IDCONT(c)) {
lex_read_unichar(0);
my_sv_cat_c(aTHX_ sv, c);
at_substart = FALSE;
c = lex_peek_unichar(0);
} else if (allow_package && !at_substart && c == '\'') {
lex_read_unichar(0);
c = lex_peek_unichar(0);
if (!MY_UNI_IDFIRST(c)) {
lex_stuff_pvs("'", 0);
break;
}
sv_catpvs(sv, "'");
at_substart = TRUE;
} else if (allow_package && (at_start || !at_substart) && c == ':') {
lex_read_unichar(0);
if (lex_peek_unichar(0) != ':') {
lex_stuff_pvs(":", 0);
break;
}
lex_read_unichar(0);
c = lex_peek_unichar(0);
if (!MY_UNI_IDFIRST(c)) {
lex_stuff_pvs("::", 0);
break;
}
sv_catpvs(sv, "::");
at_substart = TRUE;
} else {
break;
}
at_start = FALSE;
}
return SvCUR(sv) ? sv : NULL;
}
static SV *my_scan_parens_tail(pTHX_ Sentinel sen, bool keep_backslash) {
I32 c, nesting;
SV *sv;
line_t start;
start = CopLINE(PL_curcop);
sv = sentinel_mortalize(sen, newSVpvs(""));
if (lex_bufutf8()) {
SvUTF8_on(sv);
}
nesting = 0;
for (;;) {
c = lex_read_unichar(0);
if (c == EOF) {
CopLINE_set(PL_curcop, start);
return NULL;
}
if (c == '\\') {
c = lex_read_unichar(0);
if (c == EOF) {
CopLINE_set(PL_curcop, start);
return NULL;
}
if (keep_backslash || (c != '(' && c != ')')) {
sv_catpvs(sv, "\\");
}
} else if (c == '(') {
nesting++;
} else if (c == ')') {
if (!nesting) {
break;
}
nesting--;
}
my_sv_cat_c(aTHX_ sv, c);
}
return sv;
}
static void my_check_prototype(pTHX_ Sentinel sen, const SV *declarator, SV *proto) {
char *start, *r, *w, *end;
STRLEN len;
/* strip spaces */
start = SvPV(proto, len);
end = start + len;
for (w = r = start; r < end; r++) {
if (!isSPACE(*r)) {
*w++ = *r;
}
}
*w = '\0';
SvCUR_set(proto, w - start);
end = w;
len = end - start;
if (!ckWARN(WARN_ILLEGALPROTO)) {
return;
}
/* check for bad characters */
if (strspn(start, "$@%*;[]&\\_+") != len) {
SV *dsv = sentinel_mortalize(sen, newSVpvs(""));
warner(
packWARN(WARN_ILLEGALPROTO),
"Illegal character in prototype for %"SVf" : %s",
SVfARG(declarator),
SvUTF8(proto)
? sv_uni_display(
dsv,
proto,
len,
UNI_DISPLAY_ISPRINT
)
: pv_pretty(dsv, start, len, 60, NULL, NULL,
PERL_PV_ESCAPE_NONASCII
)
);
return;
}
for (r = start; r < end; r++) {
switch (*r) {
default:
warner(
packWARN(WARN_ILLEGALPROTO),
"Illegal character in prototype for %"SVf" : %s",
SVfARG(declarator), r
);
return;
case '_':
if (r[1] && !strchr(";@%", *r)) {
warner(
packWARN(WARN_ILLEGALPROTO),
"Illegal character after '_' in prototype for %"SVf" : %s",
SVfARG(declarator), r
);
return;
}
break;
case '@':
case '%':
if (r[1]) {
warner(
packWARN(WARN_ILLEGALPROTO),
"prototype after '%c' for %"SVf": %s",
*r, SVfARG(declarator), r + 1
);
return;
}
break;
case '\\':
r++;
if (strchr("$@%&*", *r)) {
break;
}
if (*r == '[') {
r++;
for (; r < end && *r != ']'; r++) {
if (!strchr("$@%&*", *r)) {
break;
}
}
if (*r == ']' && r[-1] != '[') {
break;
}
}
warner(
packWARN(WARN_ILLEGALPROTO),
"Illegal character after '\\' in prototype for %"SVf" : %s",
SVfARG(declarator), r
);
return;
case '$':
case '*':
case '&':
case ';':
case '+':
break;
}
}
}
static SV *parse_type(pTHX_ Sentinel, const SV *);
static SV *parse_type_paramd(pTHX_ Sentinel sen, const SV *declarator) {
I32 c;
SV *t;
t = my_scan_word(aTHX_ sen, TRUE);
lex_read_space(0);
c = lex_peek_unichar(0);
if (c == '[') {
SV *u;
lex_read_unichar(0);
lex_read_space(0);
my_sv_cat_c(aTHX_ t, c);
u = parse_type(aTHX_ sen, declarator);
sv_catsv(t, u);
c = lex_peek_unichar(0);
if (c != ']') {
croak("In %"SVf": missing ']' after '%"SVf"'", SVfARG(declarator), SVfARG(t));
}
lex_read_unichar(0);
lex_read_space(0);
my_sv_cat_c(aTHX_ t, c);
}
return t;
}
static SV *parse_type(pTHX_ Sentinel sen, const SV *declarator) {
I32 c;
SV *t;
t = parse_type_paramd(aTHX_ sen, declarator);
c = lex_peek_unichar(0);
while (c == '|') {
SV *u;
lex_read_unichar(0);
lex_read_space(0);
my_sv_cat_c(aTHX_ t, c);
u = parse_type_paramd(aTHX_ sen, declarator);
sv_catsv(t, u);
c = lex_peek_unichar(0);
}
return t;
}
static SV *reify_type(pTHX_ Sentinel sen, const SV *declarator, SV *name) {
SV *t;
int n;
dSP;
ENTER;
SAVETMPS;
PUSHMARK(SP);
EXTEND(SP, 1);
PUSHs(name);
PUTBACK;
n = call_pv("Moose::Util::TypeConstraints::find_or_create_isa_type_constraint", G_SCALAR);
SPAGAIN;
assert(n == 1);
/* don't warn about n being unused if assert() is compiled out */
n = n;
t = sentinel_mortalize(sen, SvREFCNT_inc(POPs));
PUTBACK;
FREETMPS;
LEAVE;
if (!SvTRUE(t)) {
croak("In %"SVf": undefined type '%"SVf"'", SVfARG(declarator), SVfARG(name));
}
return t;
}
DEFSTRUCT(Param) {
SV *name;
PADOFFSET padoff;
SV *type;
};
DEFSTRUCT(ParamInit) {
Param param;
OpGuard init;
};
#define VEC(B) B ## _Vec
#define DEFVECTOR(B) DEFSTRUCT(VEC(B)) { \
B (*data); \
size_t used, size; \
}
DEFVECTOR(Param);
DEFVECTOR(ParamInit);
#define DEFVECTOR_INIT(N, B) static void N(VEC(B) *p) { \
p->used = 0; \
p->size = 23; \
Newx(p->data, p->size, B); \
} static void N(VEC(B) *)
DEFSTRUCT(ParamSpec) {
Param invocant;
VEC(Param) positional_required;
VEC(ParamInit) positional_optional;
VEC(Param) named_required;
VEC(ParamInit) named_optional;
Param slurpy;
PADOFFSET rest_hash;
};
DEFVECTOR_INIT(pv_init, Param);
DEFVECTOR_INIT(piv_init, ParamInit);
static void p_init(Param *p) {
p->name = NULL;
p->padoff = NOT_IN_PAD;
p->type = NULL;
}
static void ps_init(ParamSpec *ps) {
p_init(&ps->invocant);
pv_init(&ps->positional_required);
piv_init(&ps->positional_optional);
pv_init(&ps->named_required);
piv_init(&ps->named_optional);
p_init(&ps->slurpy);
ps->rest_hash = NOT_IN_PAD;
}
#define DEFVECTOR_EXTEND(N, B) static B (*N(VEC(B) *p)) { \
assert(p->used <= p->size); \
if (p->used == p->size) { \
const size_t n = p->size / 2 * 3 + 1; \
Renew(p->data, n, B); \
p->size = n; \
} \
return &p->data[p->used]; \
} static B (*N(VEC(B) *))
DEFVECTOR_EXTEND(pv_extend, Param);
DEFVECTOR_EXTEND(piv_extend, ParamInit);
#define DEFVECTOR_CLEAR(N, B, F) static void N(pTHX_ VEC(B) *p) { \
while (p->used) { \
p->used--; \
F(aTHX_ &p->data[p->used]); \
} \
Safefree(p->data); \
p->data = NULL; \
p->size = 0; \
} static void N(pTHX_ VEC(B) *)
static void p_clear(pTHX_ Param *p) {
p->name = NULL;
p->padoff = NOT_IN_PAD;
p->type = NULL;
}
static void pi_clear(pTHX_ ParamInit *pi) {
p_clear(aTHX_ &pi->param);
op_guard_clear(aTHX_ &pi->init);
}
DEFVECTOR_CLEAR(pv_clear, Param, p_clear);
DEFVECTOR_CLEAR(piv_clear, ParamInit, pi_clear);
static void ps_clear(pTHX_ ParamSpec *ps) {
p_clear(aTHX_ &ps->invocant);
pv_clear(aTHX_ &ps->positional_required);
piv_clear(aTHX_ &ps->positional_optional);
pv_clear(aTHX_ &ps->named_required);
piv_clear(aTHX_ &ps->named_optional);
p_clear(aTHX_ &ps->slurpy);
}
static int ps_contains(pTHX_ const ParamSpec *ps, SV *sv) {
size_t i, lim;
if (ps->invocant.name && sv_eq(sv, ps->invocant.name)) {
return 1;
}
for (i = 0, lim = ps->positional_required.used; i < lim; i++) {
if (sv_eq(sv, ps->positional_required.data[i].name)) {
return 1;
}
}
for (i = 0, lim = ps->positional_optional.used; i < lim; i++) {
if (sv_eq(sv, ps->positional_optional.data[i].param.name)) {
return 1;
}
}
for (i = 0, lim = ps->named_required.used; i < lim; i++) {
if (sv_eq(sv, ps->named_required.data[i].name)) {
return 1;
}
}
for (i = 0, lim = ps->named_optional.used; i < lim; i++) {
if (sv_eq(sv, ps->named_optional.data[i].param.name)) {
return 1;
}
}
return 0;
}
static void ps_free_void(pTHX_ void *p) {
ps_clear(aTHX_ p);
Safefree(p);
}
static int args_min(pTHX_ const ParamSpec *ps, const KWSpec *ks) {
int n = 0;
if (!ps) {
return SvTRUE(ks->shift) ? 1 : 0;
}
if (ps->invocant.name) {
n++;
}
n += ps->positional_required.used;
n += ps->named_required.used * 2;
return n;
}
static int args_max(const ParamSpec *ps) {
int n = 0;
if (!ps) {
return -1;
}
if (ps->invocant.name) {
n++;
}
n += ps->positional_required.used;
n += ps->positional_optional.used;
if (ps->named_required.used || ps->named_optional.used || ps->slurpy.name) {
n = -1;
}
return n;
}
static size_t count_positional_params(const ParamSpec *ps) {
return ps->positional_required.used + ps->positional_optional.used;
}
static size_t count_named_params(const ParamSpec *ps) {
return ps->named_required.used + ps->named_optional.used;
}
static void my_require(pTHX_ const char *file) {
SV *err;
require_pv(file);
err = ERRSV;
if (SvTRUE(err)) {
croak_sv(err);
}
}
static SV *my_eval(pTHX_ Sentinel sen, I32 floor, OP *op) {
SV *sv;
CV *cv;
dSP;
cv = newATTRSUB(floor, NULL, NULL, NULL, op);
ENTER;
SAVETMPS;
PUSHMARK(SP);
call_sv((SV *)cv, G_SCALAR | G_NOARGS);
SPAGAIN;
sv = sentinel_mortalize(sen, SvREFCNT_inc(POPs));
PUTBACK;
FREETMPS;
LEAVE;
return sv;
}
enum {
PARAM_INVOCANT = 0x01,
PARAM_NAMED = 0x02
};
static PADOFFSET parse_param(
pTHX_
Sentinel sen,
const SV *declarator, const KWSpec *spec, ParamSpec *param_spec,
int *pflags, SV **pname, OpGuard *ginit, SV **ptype
) {
I32 c;
char sigil;
SV *name;
assert(!ginit->op);
*pflags = 0;
*ptype = NULL;
c = lex_peek_unichar(0);
if (spec->flags & FLAG_TYPES_OK) {
if (c == '(') {
I32 floor;
OP *expr;
Resource *expr_sentinel;
lex_read_unichar(0);
floor = start_subparse(FALSE, 0);
SAVEFREESV(PL_compcv);
CvSPECIAL_on(PL_compcv);
if (!(expr = parse_fullexpr(PARSE_OPTIONAL))) {
croak("In %"SVf": invalid type expression", SVfARG(declarator));
}
if (MY_OP_SLABBED(expr)) {
expr_sentinel = NULL;
} else {
expr_sentinel = sentinel_register(sen, expr, free_op_void);
}
lex_read_space(0);
c = lex_peek_unichar(0);
if (c != ')') {
croak("In %"SVf": missing ')' after type expression", SVfARG(declarator));
}
lex_read_unichar(0);
lex_read_space(0);
SvREFCNT_inc_simple_void(PL_compcv);
if (expr_sentinel) {
sentinel_disarm(expr_sentinel);
}
*ptype = my_eval(aTHX_ sen, floor, expr);
*ptype = reify_type(aTHX_ sen, declarator, *ptype);
if (!sv_isobject(*ptype)) {
croak("In %"SVf": (%"SVf") doesn't look like a type object", SVfARG(declarator), SVfARG(*ptype));
}
c = lex_peek_unichar(0);
} else if (MY_UNI_IDFIRST(c)) {
*ptype = parse_type(aTHX_ sen, declarator);
my_require(aTHX_ "Moose/Util/TypeConstraints.pm");
*ptype = reify_type(aTHX_ sen, declarator, *ptype);
c = lex_peek_unichar(0);
}
}
if (c == ':') {
lex_read_unichar(0);
lex_read_space(0);
*pflags |= PARAM_NAMED;
c = lex_peek_unichar(0);
}
if (c == -1) {
croak("In %"SVf": unterminated parameter list", SVfARG(declarator));
}
if (!(c == '$' || c == '@' || c == '%')) {
croak("In %"SVf": unexpected '%c' in parameter list (expecting a sigil)", SVfARG(declarator), (int)c);
}
sigil = c;
lex_read_unichar(0);
lex_read_space(0);
if (!(name = my_scan_word(aTHX_ sen, FALSE))) {
croak("In %"SVf": missing identifier after '%c'", SVfARG(declarator), sigil);
}
sv_insert(name, 0, 0, &sigil, 1);
*pname = name;
lex_read_space(0);
c = lex_peek_unichar(0);
if (c == '=') {
lex_read_unichar(0);
lex_read_space(0);
if (!param_spec->invocant.name && SvTRUE(spec->shift)) {
param_spec->invocant.name = spec->shift;
param_spec->invocant.padoff = pad_add_name_sv(param_spec->invocant.name, 0, NULL, NULL);
}
op_guard_update(ginit, parse_termexpr(0));
lex_read_space(0);
c = lex_peek_unichar(0);
}
if (c == ':') {
*pflags |= PARAM_INVOCANT;
lex_read_unichar(0);
lex_read_space(0);
} else if (c == ',') {
lex_read_unichar(0);
lex_read_space(0);
} else if (c != ')') {
if (c == -1) {
croak("In %"SVf": unterminated parameter list", SVfARG(declarator));
}
croak("In %"SVf": unexpected '%c' in parameter list (expecting ',')", SVfARG(declarator), (int)c);
}
return pad_add_name_sv(*pname, IF_HAVE_PERL_5_16(padadd_NO_DUP_CHECK, 0), NULL, NULL);
}
static OP *my_var_g(pTHX_ I32 type, I32 flags, PADOFFSET padoff) {
OP *var = newOP(type, flags);
var->op_targ = padoff;
return var;
}
static OP *my_var(pTHX_ I32 flags, PADOFFSET padoff) {
return my_var_g(aTHX_ OP_PADSV, flags, padoff);
}
static OP *mkhvelem(pTHX_ PADOFFSET h, OP *k) {
OP *hv = my_var_g(aTHX_ OP_PADHV, OPf_REF, h);
return newBINOP(OP_HELEM, 0, hv, k);
}
static OP *mkconstsv(pTHX_ SV *sv) {
return newSVOP(OP_CONST, 0, sv);
}
static OP *mkconstiv(pTHX_ IV i) {
return mkconstsv(aTHX_ newSViv(i));
}
static OP *mkconstpv(pTHX_ const char *p, size_t n) {
return mkconstsv(aTHX_ newSVpv(p, n));
}
#define mkconstpvs(S) mkconstpv(aTHX_ "" S "", sizeof S - 1)
static OP *mktypecheck(pTHX_ const SV *declarator, int nr, SV *name, PADOFFSET padoff, SV *type) {
/* $type->check($value) or Carp::croak "...: " . $type->get_message($value) */
OP *chk, *err, *msg, *xcroak;
err = mkconstsv(aTHX_ newSVpvf("In %"SVf": parameter %d (%"SVf"): ", SVfARG(declarator), nr, SVfARG(name)));
{
OP *args = NULL;
args = op_append_elem(OP_LIST, args, mkconstsv(aTHX_ SvREFCNT_inc_simple_NN(type)));
args = op_append_elem(
OP_LIST, args,
padoff == NOT_IN_PAD
? S_newDEFSVOP(aTHX)
: my_var(aTHX_ 0, padoff)
);
args = op_append_elem(OP_LIST, args, newUNOP(OP_METHOD, 0, mkconstpvs("get_message")));
msg = args;
msg->op_type = OP_ENTERSUB;
msg->op_ppaddr = PL_ppaddr[OP_ENTERSUB];
msg->op_flags |= OPf_STACKED;
}
msg = newBINOP(OP_CONCAT, 0, err, msg);
xcroak = newCVREF(
OPf_WANT_SCALAR,
newGVOP(OP_GV, 0, gv_fetchpvs("Carp::croak", 0, SVt_PVCV))
);
xcroak = newUNOP(OP_ENTERSUB, OPf_STACKED, op_append_elem(OP_LIST, msg, xcroak));
{
OP *args = NULL;
args = op_append_elem(OP_LIST, args, mkconstsv(aTHX_ SvREFCNT_inc_simple_NN(type)));
args = op_append_elem(
OP_LIST, args,
padoff == NOT_IN_PAD
? S_newDEFSVOP(aTHX)
: my_var(aTHX_ 0, padoff)
);
args = op_append_elem(OP_LIST, args, newUNOP(OP_METHOD, 0, mkconstpvs("check")));
chk = args;
chk->op_type = OP_ENTERSUB;
chk->op_ppaddr = PL_ppaddr[OP_ENTERSUB];
chk->op_flags |= OPf_STACKED;
}
chk = newLOGOP(OP_OR, 0, chk, xcroak);
return chk;
}
static OP *mktypecheckp(pTHX_ const SV *declarator, int nr, const Param *param) {
return mktypecheck(aTHX_ declarator, nr, param->name, param->padoff, param->type);
}
static void register_info(pTHX_ UV key, SV *declarator, const KWSpec *kws, const ParamSpec *ps) {
dSP;
ENTER;
SAVETMPS;
PUSHMARK(SP);
EXTEND(SP, 10);
/* 0 */ {
mPUSHu(key);
}
/* 1 */ {
size_t n;
char *p = SvPV(declarator, n);
char *q = memchr(p, ' ', n);
mPUSHp(p, q ? (size_t)(q - p) : n);
}
if (!ps) {
if (SvTRUE(kws->shift)) {
PUSHs(kws->shift);
} else {
PUSHmortal;
}
PUSHmortal;
mPUSHs(newRV_noinc((SV *)newAV()));
mPUSHs(newRV_noinc((SV *)newAV()));
mPUSHs(newRV_noinc((SV *)newAV()));
mPUSHs(newRV_noinc((SV *)newAV()));
mPUSHp("@_", 2);
PUSHmortal;
} else {
/* 2, 3 */ {
if (ps->invocant.name) {
PUSHs(ps->invocant.name);
if (ps->invocant.type) {
PUSHs(ps->invocant.type);
} else {
PUSHmortal;
}
} else {
PUSHmortal;
PUSHmortal;
}
}
/* 4 */ {
size_t i, lim;
AV *av;
lim = ps->positional_required.used;
av = newAV();
if (lim) {
av_extend(av, (lim - 1) * 2);
for (i = 0; i < lim; i++) {
Param *cur = &ps->positional_required.data[i];
av_push(av, SvREFCNT_inc_simple_NN(cur->name));
av_push(av, cur->type ? SvREFCNT_inc_simple_NN(cur->type) : &PL_sv_undef);
}
}
mPUSHs(newRV_noinc((SV *)av));
}
/* 5 */ {
size_t i, lim;
AV *av;
lim = ps->positional_optional.used;
av = newAV();
if (lim) {
av_extend(av, (lim - 1) * 2);
for (i = 0; i < lim; i++) {
Param *cur = &ps->positional_optional.data[i].param;
av_push(av, SvREFCNT_inc_simple_NN(cur->name));
av_push(av, cur->type ? SvREFCNT_inc_simple_NN(cur->type) : &PL_sv_undef);
}
}
mPUSHs(newRV_noinc((SV *)av));
}
/* 6 */ {
size_t i, lim;
AV *av;
lim = ps->named_required.used;
av = newAV();
if (lim) {
av_extend(av, (lim - 1) * 2);
for (i = 0; i < lim; i++) {
Param *cur = &ps->named_required.data[i];
av_push(av, SvREFCNT_inc_simple_NN(cur->name));
av_push(av, cur->type ? SvREFCNT_inc_simple_NN(cur->type) : &PL_sv_undef);
}
}
mPUSHs(newRV_noinc((SV *)av));
}
/* 7 */ {
size_t i, lim;
AV *av;
lim = ps->named_optional.used;
av = newAV();
if (lim) {
av_extend(av, (lim - 1) * 2);
for (i = 0; i < lim; i++) {
Param *cur = &ps->named_optional.data[i].param;
av_push(av, SvREFCNT_inc_simple_NN(cur->name));
av_push(av, cur->type ? SvREFCNT_inc_simple_NN(cur->type) : &PL_sv_undef);
}
}
mPUSHs(newRV_noinc((SV *)av));
}
/* 8, 9 */ {
if (ps->slurpy.name) {
PUSHs(ps->slurpy.name);
if (ps->slurpy.type) {
PUSHs(ps->slurpy.type);
} else {
PUSHmortal;
}
} else {
PUSHmortal;
PUSHmortal;
}
}
}
PUTBACK;
call_pv(MY_PKG "::_register_info", G_VOID);
FREETMPS;
LEAVE;
}
static int parse_fun(pTHX_ Sentinel sen, OP **pop, const char *keyword_ptr, STRLEN keyword_len, const KWSpec *spec) {
ParamSpec *param_spec;
SV *declarator;
I32 floor_ix;
int save_ix;
SV *saw_name;
OpGuard *prelude_sentinel;
SV *proto;
OpGuard *attrs_sentinel;
OP *body;
unsigned builtin_attrs;
I32 c;
declarator = sentinel_mortalize(sen, newSVpvn(keyword_ptr, keyword_len));
lex_read_space(0);
builtin_attrs = 0;
/* function name */
saw_name = NULL;
if ((spec->flags & FLAG_NAME_OK) && (saw_name = my_scan_word(aTHX_ sen, TRUE))) {
if (PL_parser->expect != XSTATE) {
/* bail out early so we don't predeclare $saw_name */
croak("In %"SVf": I was expecting a function body, not \"%"SVf"\"", SVfARG(declarator), SVfARG(saw_name));
}
sv_catpvs(declarator, " ");
sv_catsv(declarator, saw_name);
if (
sv_eq_pvs(saw_name, "BEGIN") ||
sv_eq_pvs(saw_name, "END") ||
sv_eq_pvs(saw_name, "INIT") ||
sv_eq_pvs(saw_name, "CHECK") ||
sv_eq_pvs(saw_name, "UNITCHECK")
) {
builtin_attrs |= MY_ATTR_SPECIAL;
}
lex_read_space(0);
} else if (!(spec->flags & FLAG_ANON_OK)) {
croak("I was expecting a function name, not \"%.*s\"", (int)(PL_parser->bufend - PL_parser->bufptr), PL_parser->bufptr);
} else {
sv_catpvs(declarator, " (anon)");
}
/* we're a subroutine declaration */
floor_ix = start_subparse(FALSE, saw_name ? 0 : CVf_ANON);
SAVEFREESV(PL_compcv);
/* create outer block: '{' */
save_ix = S_block_start(aTHX_ TRUE);
/* initialize synthetic optree */
Newx(prelude_sentinel, 1, OpGuard);
op_guard_init(prelude_sentinel);
sentinel_register(sen, prelude_sentinel, free_op_guard_void);
/* parameters */
param_spec = NULL;
c = lex_peek_unichar(0);
if (c == '(') {
OpGuard *init_sentinel;
Newx(init_sentinel, 1, OpGuard);
op_guard_init(init_sentinel);
sentinel_register(sen, init_sentinel, free_op_guard_void);
Newx(param_spec, 1, ParamSpec);
ps_init(param_spec);
sentinel_register(sen, param_spec, ps_free_void);
lex_read_unichar(0);
lex_read_space(0);
while ((c = lex_peek_unichar(0)) != ')') {
int flags;
SV *name, *type;
char sigil;
PADOFFSET padoff;
padoff = parse_param(aTHX_ sen, declarator, spec, param_spec, &flags, &name, init_sentinel, &type);
S_intro_my(aTHX);
sigil = SvPV_nolen(name)[0];
/* internal consistency */
if (flags & PARAM_NAMED) {
if (flags & PARAM_INVOCANT) {
croak("In %"SVf": invocant %"SVf" can't be a named parameter", SVfARG(declarator), SVfARG(name));
}
if (sigil != '$') {
croak("In %"SVf": named parameter %"SVf" can't be a%s", SVfARG(declarator), SVfARG(name), sigil == '@' ? "n array" : " hash");
}
} else if (flags & PARAM_INVOCANT) {
if (init_sentinel->op) {
croak("In %"SVf": invocant %"SVf" can't have a default value", SVfARG(declarator), SVfARG(name));
}
if (sigil != '$') {
croak("In %"SVf": invocant %"SVf" can't be a%s", SVfARG(declarator), SVfARG(name), sigil == '@' ? "n array" : " hash");
}
} else if (sigil != '$' && init_sentinel->op) {
croak("In %"SVf": %s %"SVf" can't have a default value", SVfARG(declarator), sigil == '@' ? "array" : "hash", SVfARG(name));
}
/* external constraints */
if (param_spec->slurpy.name) {
croak("In %"SVf": I was expecting \")\" after \"%"SVf"\", not \"%"SVf"\"", SVfARG(declarator), SVfARG(param_spec->slurpy.name), SVfARG(name));
}
if (sigil != '$') {
assert(!init_sentinel->op);
param_spec->slurpy.name = name;
param_spec->slurpy.padoff = padoff;
param_spec->slurpy.type = type;
continue;
}
if (!(flags & PARAM_NAMED) && count_named_params(param_spec)) {
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));
}
if (flags & PARAM_INVOCANT) {
if (param_spec->invocant.name) {
croak("In %"SVf": invalid double invocants %"SVf", %"SVf"", SVfARG(declarator), SVfARG(param_spec->invocant.name), SVfARG(name));
}
if (count_positional_params(param_spec) || count_named_params(param_spec)) {
croak("In %"SVf": invocant %"SVf" must be first in parameter list", SVfARG(declarator), SVfARG(name));
}
if (!(spec->flags & FLAG_INVOCANT)) {
croak("In %"SVf": invocant %"SVf" not allowed here", SVfARG(declarator), SVfARG(name));
}
param_spec->invocant.name = name;
param_spec->invocant.padoff = padoff;
param_spec->invocant.type = type;
continue;
}
if (init_sentinel->op && !(spec->flags & FLAG_DEFAULT_ARGS)) {
croak("In %"SVf": default argument for %"SVf" not allowed here", SVfARG(declarator), SVfARG(name));
}
if (ps_contains(aTHX_ param_spec, name)) {
croak("In %"SVf": %"SVf" can't appear twice in the same parameter list", SVfARG(declarator), SVfARG(name));
}
if (flags & PARAM_NAMED) {
if (!(spec->flags & FLAG_NAMED_PARAMS)) {
croak("In %"SVf": named parameter :%"SVf" not allowed here", SVfARG(declarator), SVfARG(name));
}
if (init_sentinel->op) {
ParamInit *pi = piv_extend(¶m_spec->named_optional);
pi->param.name = name;
pi->param.padoff = padoff;
pi->param.type = type;
pi->init = op_guard_transfer(init_sentinel);
param_spec->named_optional.used++;
} else {
Param *p;
if (param_spec->positional_optional.used) {
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));
}
p = pv_extend(¶m_spec->named_required);
p->name = name;
p->padoff = padoff;
p->type = type;
param_spec->named_required.used++;
}
} else {
if (init_sentinel->op || param_spec->positional_optional.used) {
ParamInit *pi = piv_extend(¶m_spec->positional_optional);
pi->param.name = name;
pi->param.padoff = padoff;
pi->param.type = type;
pi->init = op_guard_transfer(init_sentinel);
param_spec->positional_optional.used++;
} else {
Param *p = pv_extend(¶m_spec->positional_required);
p->name = name;
p->padoff = padoff;
p->type = type;
param_spec->positional_required.used++;
}
}
}
lex_read_unichar(0);
lex_read_space(0);
if (!param_spec->invocant.name && SvTRUE(spec->shift)) {
if (ps_contains(aTHX_ param_spec, spec->shift)) {
croak("In %"SVf": %"SVf" can't appear twice in the same parameter list", SVfARG(declarator), SVfARG(spec->shift));
}
param_spec->invocant.name = spec->shift;
param_spec->invocant.padoff = pad_add_name_sv(param_spec->invocant.name, 0, NULL, NULL);
}
}
/* prototype */
proto = NULL;
c = lex_peek_unichar(0);
if (c == ':') {
lex_read_unichar(0);
lex_read_space(0);
c = lex_peek_unichar(0);
if (c != '(') {
lex_stuff_pvs(":", 0);
c = ':';
} else {
lex_read_unichar(0);
if (!(proto = my_scan_parens_tail(aTHX_ sen, FALSE))) {
croak("In %"SVf": prototype not terminated", SVfARG(declarator));
}
my_check_prototype(aTHX_ sen, declarator, proto);
lex_read_space(0);
c = lex_peek_unichar(0);
if (!(c == ':' || c == '{')) {
lex_stuff_pvs(":", 0);
c = ':';
}
}
}
/* attributes */
Newx(attrs_sentinel, 1, OpGuard);
op_guard_init(attrs_sentinel);
sentinel_register(sen, attrs_sentinel, free_op_guard_void);
if (c == ':' || c == '{') /* '}' - hi, vim */ {
/* kludge default attributes in */
if (SvTRUE(spec->attrs) && SvPV_nolen(spec->attrs)[0] == ':') {
lex_stuff_sv(spec->attrs, 0);
c = ':';
}
if (c == ':') {
lex_read_unichar(0);
lex_read_space(0);
c = lex_peek_unichar(0);
for (;;) {
SV *attr;
if (!(attr = my_scan_word(aTHX_ sen, FALSE))) {
break;
}
lex_read_space(0);
c = lex_peek_unichar(0);
if (c != '(') {
if (sv_eq_pvs(attr, "lvalue")) {
builtin_attrs |= MY_ATTR_LVALUE;
attr = NULL;
} else if (sv_eq_pvs(attr, "method")) {
builtin_attrs |= MY_ATTR_METHOD;
attr = NULL;
}
} else {
SV *sv;
lex_read_unichar(0);
if (!(sv = my_scan_parens_tail(aTHX_ sen, TRUE))) {
croak("In %"SVf": unterminated attribute parameter in attribute list", SVfARG(declarator));
}
sv_catpvs(attr, "(");
sv_catsv(attr, sv);
sv_catpvs(attr, ")");
lex_read_space(0);
c = lex_peek_unichar(0);
}
if (attr) {
op_guard_update(attrs_sentinel, op_append_elem(OP_LIST, attrs_sentinel->op, mkconstsv(aTHX_ SvREFCNT_inc_simple_NN(attr))));
}
if (c == ':') {
lex_read_unichar(0);
lex_read_space(0);
c = lex_peek_unichar(0);
}
}
}
}
/* body */
if (c != '{') /* '}' - hi, vim */ {
croak("In %"SVf": I was expecting a function body, not \"%c\"", SVfARG(declarator), (int)c);
}
/* surprise predeclaration! */
if (saw_name) {
/* 'sub NAME (PROTO);' to make name/proto known to perl before it
starts parsing the body */
const I32 sub_ix = start_subparse(FALSE, 0);
SAVEFREESV(PL_compcv);
SvREFCNT_inc_simple_void(PL_compcv);
newATTRSUB(
sub_ix,
mkconstsv(aTHX_ SvREFCNT_inc_simple_NN(saw_name)),
proto ? mkconstsv(aTHX_ SvREFCNT_inc_simple_NN(proto)) : NULL,
NULL,
NULL
);
}
if (builtin_attrs & MY_ATTR_LVALUE) {
CvLVALUE_on(PL_compcv);
}
if (builtin_attrs & MY_ATTR_METHOD) {
CvMETHOD_on(PL_compcv);
}
if (builtin_attrs & MY_ATTR_SPECIAL) {
CvSPECIAL_on(PL_compcv);
}
/* check number of arguments */
if (spec->flags & FLAG_CHECK_NARGS) {
int amin, amax;
amin = args_min(aTHX_ param_spec, spec);
if (amin > 0) {
OP *chk, *cond, *err, *xcroak;
err = mkconstsv(aTHX_ newSVpvf("Not enough arguments for %"SVf" (expected %d, got ", SVfARG(declarator), amin));
err = newBINOP(
OP_CONCAT, 0,
err,
newAVREF(newGVOP(OP_GV, 0, PL_defgv))
);
err = newBINOP(
OP_CONCAT, 0,
err,
mkconstpvs(")")
);
xcroak = newCVREF(OPf_WANT_SCALAR,
newGVOP(OP_GV, 0, gv_fetchpvs("Carp::croak", 0, SVt_PVCV)));
err = newUNOP(OP_ENTERSUB, OPf_STACKED,
op_append_elem(OP_LIST, err, xcroak));
cond = newBINOP(OP_LT, 0,
newAVREF(newGVOP(OP_GV, 0, PL_defgv)),
mkconstiv(aTHX_ amin));
chk = newLOGOP(OP_AND, 0, cond, err);
op_guard_update(prelude_sentinel, op_append_list(OP_LINESEQ, prelude_sentinel->op, newSTATEOP(0, NULL, chk)));
}
amax = args_max(param_spec);
if (amax >= 0) {
OP *chk, *cond, *err, *xcroak;
err = mkconstsv(aTHX_ newSVpvf("Too many arguments for %"SVf" (expected %d, got ", SVfARG(declarator), amax));
err = newBINOP(
OP_CONCAT, 0,
err,
newAVREF(newGVOP(OP_GV, 0, PL_defgv))
);
err = newBINOP(
OP_CONCAT, 0,
err,
mkconstpvs(")")
);
xcroak = newCVREF(
OPf_WANT_SCALAR,
newGVOP(OP_GV, 0, gv_fetchpvs("Carp::croak", 0, SVt_PVCV))
);
err = newUNOP(OP_ENTERSUB, OPf_STACKED,
op_append_elem(OP_LIST, err, xcroak));
cond = newBINOP(
OP_GT, 0,
newAVREF(newGVOP(OP_GV, 0, PL_defgv)),
mkconstiv(aTHX_ amax)
);
chk = newLOGOP(OP_AND, 0, cond, err);
op_guard_update(prelude_sentinel, op_append_list(OP_LINESEQ, prelude_sentinel->op, newSTATEOP(0, NULL, chk)));
}
if (param_spec && (count_named_params(param_spec) || (param_spec->slurpy.name && SvPV_nolen(param_spec->slurpy.name)[0] == '%'))) {
OP *chk, *cond, *err, *xcroak;
const UV fixed = count_positional_params(param_spec) + !!param_spec->invocant.name;
err = mkconstsv(aTHX_ newSVpvf("Odd number of paired arguments for %"SVf"", SVfARG(declarator)));
xcroak = newCVREF(
OPf_WANT_SCALAR,
newGVOP(OP_GV, 0, gv_fetchpvs("Carp::croak", 0, SVt_PVCV))
);
err = newUNOP(OP_ENTERSUB, OPf_STACKED,
op_append_elem(OP_LIST, err, xcroak));
cond = newBINOP(OP_GT, 0,
newAVREF(newGVOP(OP_GV, 0, PL_defgv)),
mkconstiv(aTHX_ fixed));
cond = newLOGOP(OP_AND, 0,
cond,
newBINOP(OP_MODULO, 0,
fixed
? newBINOP(OP_SUBTRACT, 0,
newAVREF(newGVOP(OP_GV, 0, PL_defgv)),
mkconstiv(aTHX_ fixed))
: newAVREF(newGVOP(OP_GV, 0, PL_defgv)),
mkconstiv(aTHX_ 2)));
chk = newLOGOP(OP_AND, 0, cond, err);
op_guard_update(prelude_sentinel, op_append_list(OP_LINESEQ, prelude_sentinel->op, newSTATEOP(0, NULL, chk)));
}
}
if (!param_spec) {
/* my $invocant = shift; */
if (SvTRUE(spec->shift)) {
OP *var;
var = my_var(
aTHX_
OPf_MOD | (OPpLVAL_INTRO << 8),
pad_add_name_sv(spec->shift, 0, NULL, NULL)
);
var = newASSIGNOP(OPf_STACKED, var, 0, newOP(OP_SHIFT, 0));
op_guard_update(prelude_sentinel, op_append_list(OP_LINESEQ, prelude_sentinel->op, newSTATEOP(0, NULL, var)));
}
} else {
/* my $invocant = shift; */
if (param_spec->invocant.name) {
OP *var;
var = my_var(
aTHX_
OPf_MOD | (OPpLVAL_INTRO << 8),
param_spec->invocant.padoff
);
var = newASSIGNOP(OPf_STACKED, var, 0, newOP(OP_SHIFT, 0));
op_guard_update(prelude_sentinel, op_append_list(OP_LINESEQ, prelude_sentinel->op, newSTATEOP(0, NULL, var)));
if (param_spec->invocant.type && (spec->flags & FLAG_CHECK_TARGS)) {
op_guard_update(prelude_sentinel, op_append_list(OP_LINESEQ, prelude_sentinel->op, newSTATEOP(0, NULL, mktypecheckp(aTHX_ declarator, 0, ¶m_spec->invocant))));
}
}
/* my (...) = @_; */
{
OP *lhs;
size_t i, lim;
lhs = NULL;
for (i = 0, lim = param_spec->positional_required.used; i < lim; i++) {
OP *const var = my_var(
aTHX_
OPf_WANT_LIST | (OPpLVAL_INTRO << 8),
param_spec->positional_required.data[i].padoff
);
lhs = op_append_elem(OP_LIST, lhs, var);
}
for (i = 0, lim = param_spec->positional_optional.used; i < lim; i++) {
OP *const var = my_var(
aTHX_
OPf_WANT_LIST | (OPpLVAL_INTRO << 8),
param_spec->positional_optional.data[i].param.padoff
);
lhs = op_append_elem(OP_LIST, lhs, var);
}
{
PADOFFSET padoff;
I32 type;
bool slurpy_hash;
/*
* cases:
* 1) no named params
* 1.1) slurpy
* => put it in
* 1.2) no slurpy
* => nop
* 2) named params
* 2.1) no slurpy
* => synthetic %{rest}
* 2.2) slurpy is a hash
* => put it in
* 2.3) slurpy is an array
* => synthetic %{rest}
* remember to declare array later
*/
slurpy_hash = param_spec->slurpy.name && SvPV_nolen(param_spec->slurpy.name)[0] == '%';
if (!count_named_params(param_spec)) {
if (param_spec->slurpy.name) {
padoff = param_spec->slurpy.padoff;
type = slurpy_hash ? OP_PADHV : OP_PADAV;
} else {
padoff = NOT_IN_PAD;
type = OP_PADSV;
}
} else if (slurpy_hash) {
padoff = param_spec->slurpy.padoff;
type = OP_PADHV;
} else {
padoff = param_spec->rest_hash = pad_add_name_pvs("%{rest}", 0, NULL, NULL);
type = OP_PADHV;
}
if (padoff != NOT_IN_PAD) {
OP *const var = my_var_g(
aTHX_
type,
OPf_WANT_LIST | (OPpLVAL_INTRO << 8),
padoff
);
lhs = op_append_elem(OP_LIST, lhs, var);
if (type == OP_PADHV) {
param_spec->rest_hash = padoff;
}
}
}
if (lhs) {
OP *rhs;
lhs->op_flags |= OPf_PARENS;
rhs = newAVREF(newGVOP(OP_GV, 0, PL_defgv));
op_guard_update(prelude_sentinel, op_append_list(
OP_LINESEQ, prelude_sentinel->op,
newSTATEOP(
0, NULL,
newASSIGNOP(OPf_STACKED, lhs, 0, rhs)
)
));
}
}
/* default positional arguments */
{
size_t i, lim, req;
OP *nest;
nest = NULL;
req = param_spec->positional_required.used;
for (i = 0, lim = param_spec->positional_optional.used; i < lim; i++) {
ParamInit *cur = ¶m_spec->positional_optional.data[i];
OP *var, *cond;
cond = newBINOP(
OP_LT, 0,
newAVREF(newGVOP(OP_GV, 0, PL_defgv)),
mkconstiv(aTHX_ req + i + 1)
);
var = my_var(aTHX_ 0, cur->param.padoff);
nest = op_append_list(
OP_LINESEQ, nest,
newASSIGNOP(OPf_STACKED, var, 0, op_guard_relinquish(&cur->init))
);
nest = newCONDOP(
0,
cond,
nest,
NULL
);
}
op_guard_update(prelude_sentinel, op_append_list(
OP_LINESEQ, prelude_sentinel->op,
nest
));
}
/* named parameters */
if (count_named_params(param_spec)) {
size_t i, lim;
assert(param_spec->rest_hash != NOT_IN_PAD);
for (i = 0, lim = param_spec->named_required.used; i < lim; i++) {
Param *cur = ¶m_spec->named_required.data[i];
size_t n;
char *p = SvPV(cur->name, n);
OP *var, *cond;
cond = mkhvelem(aTHX_ param_spec->rest_hash, mkconstpv(aTHX_ p + 1, n - 1));
if (spec->flags & FLAG_CHECK_NARGS) {
OP *xcroak, *msg;
var = mkhvelem(aTHX_ param_spec->rest_hash, mkconstpv(aTHX_ p + 1, n - 1));
var = newUNOP(OP_DELETE, 0, var);
msg = mkconstsv(aTHX_ newSVpvf("In %"SVf": missing named parameter: %.*s", SVfARG(declarator), (int)(n - 1), p + 1));
xcroak = newCVREF(
OPf_WANT_SCALAR,
newGVOP(OP_GV, 0, gv_fetchpvs("Carp::croak", 0, SVt_PVCV))
);
xcroak = newUNOP(OP_ENTERSUB, OPf_STACKED, op_append_elem(OP_LIST, msg, xcroak));
cond = newUNOP(OP_EXISTS, 0, cond);
cond = newCONDOP(0, cond, var, xcroak);
}
var = my_var(
aTHX_
OPf_MOD | (OPpLVAL_INTRO << 8),
cur->padoff
);
var = newASSIGNOP(OPf_STACKED, var, 0, cond);
op_guard_update(prelude_sentinel, op_append_list(OP_LINESEQ, prelude_sentinel->op, newSTATEOP(0, NULL, var)));
}
for (i = 0, lim = param_spec->named_optional.used; i < lim; i++) {
ParamInit *cur = ¶m_spec->named_optional.data[i];
size_t n;
char *p = SvPV(cur->param.name, n);
OP *var, *cond;
var = mkhvelem(aTHX_ param_spec->rest_hash, mkconstpv(aTHX_ p + 1, n - 1));
var = newUNOP(OP_DELETE, 0, var);
cond = mkhvelem(aTHX_ param_spec->rest_hash, mkconstpv(aTHX_ p + 1, n - 1));
cond = newUNOP(OP_EXISTS, 0, cond);
cond = newCONDOP(0, cond, var, op_guard_relinquish(&cur->init));
var = my_var(
aTHX_
OPf_MOD | (OPpLVAL_INTRO << 8),
cur->param.padoff
);
var = newASSIGNOP(OPf_STACKED, var, 0, cond);
op_guard_update(prelude_sentinel, op_append_list(OP_LINESEQ, prelude_sentinel->op, newSTATEOP(0, NULL, var)));
}
if (!param_spec->slurpy.name) {
if (spec->flags & FLAG_CHECK_NARGS) {
/* croak if %{rest} */
OP *xcroak, *cond, *keys, *msg;
keys = newUNOP(OP_KEYS, 0, my_var_g(aTHX_ OP_PADHV, 0, param_spec->rest_hash));
keys = newLISTOP(OP_SORT, 0, newOP(OP_PUSHMARK, 0), keys);
{
OP *first, *mid, *last;
last = keys;
mid = mkconstpvs(", ");
mid->op_sibling = last;
first = newOP(OP_PUSHMARK, 0);
keys = newLISTOP(OP_JOIN, 0, first, mid);
keys->op_targ = pad_alloc(OP_JOIN, SVs_PADTMP);
((LISTOP *)keys)->op_last = last;
}
msg = mkconstsv(aTHX_ newSVpvf("In %"SVf": no such named parameter: ", SVfARG(declarator)));
msg = newBINOP(OP_CONCAT, 0, msg, keys);
xcroak = newCVREF(
OPf_WANT_SCALAR,
newGVOP(OP_GV, 0, gv_fetchpvs("Carp::croak", 0, SVt_PVCV))
);
xcroak = newUNOP(OP_ENTERSUB, OPf_STACKED, op_append_elem(OP_LIST, msg, xcroak));
cond = newUNOP(OP_KEYS, 0, my_var_g(aTHX_ OP_PADHV, 0, param_spec->rest_hash));
xcroak = newCONDOP(0, cond, xcroak, NULL);
op_guard_update(prelude_sentinel, op_append_list(OP_LINESEQ, prelude_sentinel->op, newSTATEOP(0, NULL, xcroak)));
} else {
OP *clear;
clear = newASSIGNOP(
OPf_STACKED,
my_var_g(aTHX_ OP_PADHV, 0, param_spec->rest_hash),
0,
newNULLLIST()
);
op_guard_update(prelude_sentinel, op_append_list(OP_LINESEQ, prelude_sentinel->op, newSTATEOP(0, NULL, clear)));
}
} else if (param_spec->slurpy.padoff != param_spec->rest_hash) {
OP *var, *clear;
assert(SvPV_nolen(param_spec->slurpy.name)[0] == '@');
var = my_var_g(
aTHX_
OP_PADAV,
OPf_MOD | (OPpLVAL_INTRO << 8),
param_spec->slurpy.padoff
);
var = newASSIGNOP(OPf_STACKED, var, 0, my_var_g(aTHX_ OP_PADHV, 0, param_spec->rest_hash));
op_guard_update(prelude_sentinel, op_append_list(OP_LINESEQ, prelude_sentinel->op, newSTATEOP(0, NULL, var)));
clear = newASSIGNOP(
OPf_STACKED,
my_var_g(aTHX_ OP_PADHV, 0, param_spec->rest_hash),
0,
newNULLLIST()
);
op_guard_update(prelude_sentinel, op_append_list(OP_LINESEQ, prelude_sentinel->op, newSTATEOP(0, NULL, clear)));
}
}
if (spec->flags & FLAG_CHECK_TARGS) {
size_t i, lim, base;
base = 1;
for (i = 0, lim = param_spec->positional_required.used; i < lim; i++) {
Param *cur = ¶m_spec->positional_required.data[i];
if (cur->type) {
op_guard_update(prelude_sentinel, op_append_list(OP_LINESEQ, prelude_sentinel->op, newSTATEOP(0, NULL, mktypecheckp(aTHX_ declarator, base + i, cur))));
}
}
base += i;
for (i = 0, lim = param_spec->positional_optional.used; i < lim; i++) {
Param *cur = ¶m_spec->positional_optional.data[i].param;
if (cur->type) {
op_guard_update(prelude_sentinel, op_append_list(OP_LINESEQ, prelude_sentinel->op, newSTATEOP(0, NULL, mktypecheckp(aTHX_ declarator, base + i, cur))));
}
}
base += i;
for (i = 0, lim = param_spec->named_required.used; i < lim; i++) {
Param *cur = ¶m_spec->named_required.data[i];
if (cur->type) {
op_guard_update(prelude_sentinel, op_append_list(OP_LINESEQ, prelude_sentinel->op, newSTATEOP(0, NULL, mktypecheckp(aTHX_ declarator, base + i, cur))));
}
}
base += i;
for (i = 0, lim = param_spec->named_optional.used; i < lim; i++) {
Param *cur = ¶m_spec->named_optional.data[i].param;
if (cur->type) {
op_guard_update(prelude_sentinel, op_append_list(OP_LINESEQ, prelude_sentinel->op, newSTATEOP(0, NULL, mktypecheckp(aTHX_ declarator, base + i, cur))));
}
}
base += i;
if (param_spec->slurpy.type) {
/* $type->valid($_) or croak $type->get_message($_) for @rest / values %rest */
OP *check, *list, *loop;
check = mktypecheck(aTHX_ declarator, base, param_spec->slurpy.name, NOT_IN_PAD, param_spec->slurpy.type);
if (SvPV_nolen(param_spec->slurpy.name)[0] == '@') {
list = my_var_g(aTHX_ OP_PADAV, 0, param_spec->slurpy.padoff);
} else {
list = my_var_g(aTHX_ OP_PADHV, 0, param_spec->slurpy.padoff);
list = newUNOP(OP_VALUES, 0, list);
}
loop = newFOROP(0, NULL, list, check, NULL);
op_guard_update(prelude_sentinel, op_append_list(OP_LINESEQ, prelude_sentinel->op, newSTATEOP(0, NULL, loop)));
}
}
}
/* finally let perl parse the actual subroutine body */
body = parse_block(0);
/* add '();' to make function return nothing by default */
/* (otherwise the invisible parameter initialization can "leak" into
the return value: fun ($x) {}->("asdf", 0) == 2) */
if (prelude_sentinel->op) {
body = newSTATEOP(0, NULL, body);
}
body = op_append_list(OP_LINESEQ, op_guard_relinquish(prelude_sentinel), body);
/* it's go time. */
{
CV *cv;
OP *const attrs = op_guard_relinquish(attrs_sentinel);
SvREFCNT_inc_simple_void(PL_compcv);
/* close outer block: '}' */
S_block_end(aTHX_ save_ix, body);
cv = newATTRSUB(
floor_ix,
saw_name ? newSVOP(OP_CONST, 0, SvREFCNT_inc_simple_NN(saw_name)) : NULL,
proto ? newSVOP(OP_CONST, 0, SvREFCNT_inc_simple_NN(proto)) : NULL,
attrs,
body
);
if (cv) {
register_info(aTHX_ PTR2UV(CvROOT(cv)), declarator, spec, param_spec);
}
if (saw_name) {
*pop = newOP(OP_NULL, 0);
return KEYWORD_PLUGIN_STMT;
}
*pop = newUNOP(
OP_REFGEN, 0,
newSVOP(
OP_ANONCODE, 0,
(SV *)cv
)
);
return KEYWORD_PLUGIN_EXPR;
}
}
static int kw_flags_enter(pTHX_ Sentinel sen, const char *kw_ptr, STRLEN kw_len, KWSpec *spec) {
HV *hints;
SV *sv, **psv;
const char *p, *kw_active;
STRLEN kw_active_len;
if (!(hints = GvHV(PL_hintgv))) {
return FALSE;
}
if (!(psv = hv_fetchs(hints, HINTK_KEYWORDS, 0))) {
return FALSE;
}
sv = *psv;
kw_active = SvPV(sv, kw_active_len);
if (kw_active_len <= kw_len) {
return FALSE;
}
for (
p = kw_active;
(p = strchr(p, *kw_ptr)) &&
p < kw_active + kw_active_len - kw_len;
p++
) {
if (
(p == kw_active || p[-1] == ' ') &&
p[kw_len] == ' ' &&
memcmp(kw_ptr, p, kw_len) == 0
) {
ENTER;
SAVETMPS;
SAVEDESTRUCTOR_X(sentinel_clear_void, sen);
spec->flags = 0;
spec->shift = sentinel_mortalize(sen, newSVpvs(""));
spec->attrs = sentinel_mortalize(sen, newSVpvs(""));
#define FETCH_HINTK_INTO(NAME, PTR, LEN, X) STMT_START { \
const char *fk_ptr_; \
STRLEN fk_len_; \
SV *fk_sv_; \
fk_sv_ = sentinel_mortalize(sen, newSVpvs(HINTK_ ## NAME)); \
sv_catpvn(fk_sv_, PTR, LEN); \
fk_ptr_ = SvPV(fk_sv_, fk_len_); \
if (!((X) = hv_fetch(hints, fk_ptr_, fk_len_, 0))) { \
croak("%s: internal error: $^H{'%.*s'} not set", MY_PKG, (int)fk_len_, fk_ptr_); \
} \
} STMT_END
FETCH_HINTK_INTO(FLAGS_, kw_ptr, kw_len, psv);
spec->flags = SvIV(*psv);
FETCH_HINTK_INTO(SHIFT_, kw_ptr, kw_len, psv);
SvSetSV(spec->shift, *psv);
FETCH_HINTK_INTO(ATTRS_, kw_ptr, kw_len, psv);
SvSetSV(spec->attrs, *psv);
#undef FETCH_HINTK_INTO
return TRUE;
}
}
return FALSE;
}
static int my_keyword_plugin(pTHX_ char *keyword_ptr, STRLEN keyword_len, OP **op_ptr) {
Sentinel sen = { NULL };
KWSpec spec;
int ret;
if (kw_flags_enter(aTHX_ sen, keyword_ptr, keyword_len, &spec)) {
/* scope was entered, 'sen' and 'spec' are initialized */
ret = parse_fun(aTHX_ sen, op_ptr, keyword_ptr, keyword_len, &spec);
FREETMPS;
LEAVE;
} else {
/* not one of our keywords, no allocation done */
ret = next_keyword_plugin(aTHX_ keyword_ptr, keyword_len, op_ptr);
}
return ret;
}
WARNINGS_RESET
MODULE = Function::Parameters PACKAGE = Function::Parameters PREFIX = fp_
PROTOTYPES: ENABLE
UV
fp__cv_root(sv)
SV * sv
PREINIT:
CV *xcv;
HV *hv;
GV *gv;
CODE:
xcv = sv_2cv(sv, &hv, &gv, 0);
RETVAL = PTR2UV(xcv ? CvROOT(xcv) : NULL);
OUTPUT:
RETVAL
BOOT:
WARNINGS_ENABLE {
HV *const stash = gv_stashpvs(MY_PKG, GV_ADD);
/**/
newCONSTSUB(stash, "FLAG_NAME_OK", newSViv(FLAG_NAME_OK));
newCONSTSUB(stash, "FLAG_ANON_OK", newSViv(FLAG_ANON_OK));
newCONSTSUB(stash, "FLAG_DEFAULT_ARGS", newSViv(FLAG_DEFAULT_ARGS));
newCONSTSUB(stash, "FLAG_CHECK_NARGS", newSViv(FLAG_CHECK_NARGS));
newCONSTSUB(stash, "FLAG_INVOCANT", newSViv(FLAG_INVOCANT));
newCONSTSUB(stash, "FLAG_NAMED_PARAMS", newSViv(FLAG_NAMED_PARAMS));
newCONSTSUB(stash, "FLAG_TYPES_OK", newSViv(FLAG_TYPES_OK));
newCONSTSUB(stash, "FLAG_CHECK_TARGS", newSViv(FLAG_CHECK_TARGS));
newCONSTSUB(stash, "HINTK_KEYWORDS", newSVpvs(HINTK_KEYWORDS));
newCONSTSUB(stash, "HINTK_FLAGS_", newSVpvs(HINTK_FLAGS_));
newCONSTSUB(stash, "HINTK_SHIFT_", newSVpvs(HINTK_SHIFT_));
newCONSTSUB(stash, "HINTK_ATTRS_", newSVpvs(HINTK_ATTRS_));
/**/
next_keyword_plugin = PL_keyword_plugin;
PL_keyword_plugin = my_keyword_plugin;
} WARNINGS_RESET