WARNINGS_ENABLEW(-Wall) \
WARNINGS_ENABLEW(-Wextra) \
WARNINGS_ENABLEW(-Wundef) \
- WARNINGS_ENABLEW(-Wshadow) \
+ /* WARNINGS_ENABLEW(-Wshadow) :-( */ \
WARNINGS_ENABLEW(-Wbad-function-cast) \
WARNINGS_ENABLEW(-Wcast-align) \
WARNINGS_ENABLEW(-Wwrite-strings) \
#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
+
+
#define MY_PKG "Function::Parameters"
#define HINTK_KEYWORDS MY_PKG "/keywords"
-#define HINTK_NAME_ MY_PKG "/name:"
+#define HINTK_FLAGS_ MY_PKG "/flags:"
#define HINTK_SHIFT_ MY_PKG "/shift:"
+#define HINTK_ATTRS_ MY_PKG "/attrs:"
-#define HAVE_PERL_VERSION(R, V, S) \
- (PERL_REVISION > (R) || (PERL_REVISION == (R) && (PERL_VERSION > (V) || (PERL_VERSION == (V) && (PERL_SUBVERSION >= (S))))))
+#define DEFSTRUCT(T) typedef struct T T; struct T
-typedef struct {
- enum {
- FLAG_NAME_OPTIONAL = 1,
- FLAG_NAME_REQUIRED,
- FLAG_NAME_PROHIBITED
- } name;
- char shift[256];
-} Spec;
+DEFSTRUCT(DefaultParamSpec) {
+ DefaultParamSpec *next;
+ int limit;
+ SV *name;
+ OP *init;
+};
+
+enum {
+ FLAG_NAME_OK = 0x01,
+ FLAG_ANON_OK = 0x02,
+ FLAG_DEFAULT_ARGS = 0x04,
+ FLAG_CHECK_NARGS = 0x08
+};
+
+DEFSTRUCT(KWSpec) {
+ unsigned flags;
+ SV *shift;
+ SV *attrs;
+};
static int (*next_keyword_plugin)(pTHX_ char *, STRLEN, OP **);
-static int kw_flags(pTHX_ const char *kw_ptr, STRLEN kw_len, Spec *spec) {
+static int kw_flags(pTHX_ const char *kw_ptr, STRLEN kw_len, KWSpec *spec) {
HV *hints;
SV *sv, **psv;
const char *p, *kw_active;
STRLEN kw_active_len;
- spec->name = 0;
- spec->shift[0] = '\0';
+ spec->flags = 0;
+ spec->shift = sv_2mortal(newSVpvs(""));
+ spec->attrs = sv_2mortal(newSVpvs(""));
if (!(hints = GvHV(PL_hintgv))) {
return FALSE;
if (kw_active_len <= kw_len) {
return FALSE;
}
- for (p = kw_active; p < kw_active + kw_active_len - kw_len; p++) {
+ 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
) {
- const char *kf_ptr;
- STRLEN kf_len;
- SV *kf_sv;
-
- kf_sv = sv_2mortal(newSVpvs(HINTK_NAME_));
- sv_catpvn(kf_sv, kw_ptr, kw_len);
- kf_ptr = SvPV(kf_sv, kf_len);
- if (!(psv = hv_fetch(hints, kf_ptr, kf_len, 0))) {
- croak("%s: internal error: $^H{'%.*s'} not set", MY_PKG, (int)kf_len, kf_ptr);
- }
- spec->name = SvIV(*psv);
- kf_sv = sv_2mortal(newSVpvs(HINTK_SHIFT_));
- sv_catpvn(kf_sv, kw_ptr, kw_len);
- kf_ptr = SvPV(kf_sv, kf_len);
- if (!(psv = hv_fetch(hints, kf_ptr, kf_len, 0))) {
- croak("%s: internal error: $^H{'%.*s'} not set", MY_PKG, (int)kf_len, kf_ptr);
- }
- my_sprintf(spec->shift, "%.*s", (int)(sizeof spec->shift - 1), SvPV_nolen(*psv));
+#define FETCH_HINTK_INTO(NAME, PTR, LEN, X) STMT_START { \
+ const char *fk_ptr_; \
+ STRLEN fk_len_; \
+ SV *fk_sv_; \
+ fk_sv_ = sv_2mortal(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;
}
}
}
-#include "toke_on_crack.c.inc"
+static void free_defspec(pTHX_ void *vp) {
+ DefaultParamSpec *dp = vp;
+ op_free(dp->init);
+ Safefree(dp);
+}
+
+static void free_ptr_op(pTHX_ void *vp) {
+ OP **pp = vp;
+ op_free(*pp);
+ Safefree(pp);
+}
+
+#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"
-static int parse_fun(pTHX_ OP **pop, const char *keyword_ptr, STRLEN keyword_len, const Spec *spec) {
- SV *gen, *declarator, *params, *sv;
- line_t line_start;
- int saw_name, saw_colon;
+#if 0
+static PADOFFSET pad_add_my_sv(SV *name) {
+ PADOFFSET offset;
+ SV *namesv, *myvar;
+ char *p;
+ STRLEN len;
+
+ p = SvPV(name, len);
+ myvar = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, 1);
+ offset = AvFILLp(PL_comppad);
+ SvPADMY_on(myvar);
+ if (*p == '@') {
+ SvUPGRADE(myvar, SVt_PVAV);
+ } else if (*p == '%') {
+ SvUPGRADE(myvar, SVt_PVHV);
+ }
+ PL_curpad = AvARRAY(PL_comppad);
+ namesv = newSV_type(SVt_PVMG);
+ sv_setpvn(namesv, p, len);
+ COP_SEQ_RANGE_LOW_set(namesv, PL_cop_seqmax);
+ COP_SEQ_RANGE_HIGH_set(namesv, PERL_PADSEQ_INTRO);
+ PL_cop_seqmax++;
+ av_store(PL_comppad_name, offset, namesv);
+ return offset;
+}
+#endif
+
+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 = uvchr_to_utf8(ds, c);
+ if (d - ds > 1) {
+ sv_utf8_upgrade(sv);
+ }
+ sv_catpvn(sv, ds, d - ds);
+}
+
+static bool my_is_uni_xidfirst(pTHX_ UV c) {
+ U8 tmpbuf[UTF8_MAXBYTES + 1];
+ uvchr_to_utf8(tmpbuf, c);
+ return is_utf8_xidfirst(tmpbuf);
+}
+
+static bool my_is_uni_xidcont(pTHX_ UV c) {
+ U8 tmpbuf[UTF8_MAXBYTES + 1];
+ uvchr_to_utf8(tmpbuf, c);
+ return is_utf8_xidcont(tmpbuf);
+}
+
+static SV *my_scan_word(pTHX_ bool allow_package) {
+ bool at_start, at_substart;
+ I32 c;
+ SV *sv = sv_2mortal(newSVpvs(""));
+ if (lex_bufutf8()) {
+ SvUTF8_on(sv);
+ }
+
+ at_start = at_substart = TRUE;
+ c = lex_peek_unichar(0);
+
+ while (c != -1) {
+ if (at_substart ? my_is_uni_xidfirst(aTHX_ c) : my_is_uni_xidcont(aTHX_ 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_is_uni_xidfirst(aTHX_ 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_is_uni_xidfirst(aTHX_ 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_ bool keep_backslash) {
+ I32 c, nesting;
+ SV *sv;
+ line_t start;
+
+ start = CopLINE(PL_curcop);
+
+ sv = sv_2mortal(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_ 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 = newSVpvs_flags("", SVs_TEMP);
+ 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 int parse_fun(pTHX_ OP **pop, const char *keyword_ptr, STRLEN keyword_len, const KWSpec *spec) {
+ SV *declarator;
+ I32 floor_ix;
+ int save_ix;
+ SV *saw_name;
+ OP **prelude_sentinel;
+ AV *params;
+ DefaultParamSpec *defaults;
+ int args_min, args_max;
+ SV *proto;
+ OP **attrs_sentinel, *body;
+ unsigned builtin_attrs;
STRLEN len;
- char *s;
I32 c;
- gen = sv_2mortal(newSVpvs("sub"));
declarator = sv_2mortal(newSVpvn(keyword_ptr, keyword_len));
- params = sv_2mortal(newSVpvs(""));
- line_start = CopLINE(PL_curcop);
lex_read_space(0);
+ builtin_attrs = 0;
+
/* function name */
- saw_name = 0;
- s = PL_parser->bufptr;
- if (spec->name != FLAG_NAME_PROHIBITED && (len = S_scan_word(aTHX_ s, TRUE))) {
- sv_catpvs(gen, " ");
- sv_catpvn(gen, s, len);
+ saw_name = NULL;
+ if ((spec->flags & FLAG_NAME_OK) && (saw_name = my_scan_word(aTHX_ 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_catpvn(declarator, s, len);
- lex_read_to(s + len);
+ 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);
- saw_name = 1;
- } else if (spec->name == FLAG_NAME_REQUIRED) {
- croak("I was expecting a function name, not \"%.*s\"", (int)(PL_parser->bufend - s), s);
+ } 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, OP *);
+ *prelude_sentinel = NULL;
+ SAVEDESTRUCTOR_X(free_ptr_op, prelude_sentinel);
+
/* parameters */
+ params = NULL;
+ defaults = NULL;
+ args_min = 0;
+ args_max = -1;
+
+ /* my $self; */
+ if (SvTRUE(spec->shift)) {
+ OP *var;
+
+ var = newOP(OP_PADSV, OPf_MOD | (OPpLVAL_INTRO << 8));
+ var->op_targ = pad_add_name_sv(spec->shift, 0, NULL, NULL);
+
+ *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, newSTATEOP(0, NULL, var));
+ }
+
c = lex_peek_unichar(0);
if (c == '(') {
+ DefaultParamSpec **pdefaults_tail = &defaults;
SV *saw_slurpy = NULL;
+ int param_count = 0;
+ args_max = 0;
lex_read_unichar(0);
lex_read_space(0);
+ params = newAV();
+ sv_2mortal((SV *)params);
+
for (;;) {
c = lex_peek_unichar(0);
- if (c && strchr("$@%", c)) {
- sv_catpvf(params, "%c", (int)c);
+ if (c == '$' || c == '@' || c == '%') {
+ const char sigil = c;
+ SV *param;
+
+ param_count++;
+
lex_read_unichar(0);
lex_read_space(0);
- s = PL_parser->bufptr;
- if (!(len = S_scan_word(aTHX_ s, FALSE))) {
- croak("In %.*s: missing identifier", (int)SvCUR(declarator), SvPV_nolen(declarator));
+ if (!(param = my_scan_word(aTHX_ FALSE))) {
+ croak("In %"SVf": missing identifier", SVfARG(declarator));
}
+ sv_insert(param, 0, 0, &sigil, 1);
if (saw_slurpy) {
- croak("In %.*s: I was expecting \")\" after \"%s\", not \"%c%.*s\"", (int)SvCUR(declarator), SvPV_nolen(declarator), SvPV_nolen(saw_slurpy), (int)c, (int)len, s);
+ croak("In %"SVf": I was expecting \")\" after \"%"SVf"\", not \"%"SVf"\"", SVfARG(declarator), SVfARG(saw_slurpy), SVfARG(param));
}
- if (c != '$') {
- saw_slurpy = sv_2mortal(newSVpvf("%c%.*s", (int)c, (int)len, s));
+ if (sigil == '$') {
+ args_max++;
+ } else {
+ args_max = -1;
+ saw_slurpy = param;
}
- sv_catpvn(params, s, len);
- sv_catpvs(params, ",");
- lex_read_to(s + len);
+ av_push(params, SvREFCNT_inc_simple_NN(param));
lex_read_space(0);
c = lex_peek_unichar(0);
+
+ if (!(c == '=' && (spec->flags & FLAG_DEFAULT_ARGS))) {
+ if (sigil == '$' && !defaults) {
+ args_min++;
+ }
+ } else if (sigil != '$') {
+ croak("In %"SVf": %s %"SVf" can't have a default value", SVfARG(declarator), sigil == '@' ? "array" : "hash", SVfARG(saw_slurpy));
+ } else {
+ DefaultParamSpec *curdef;
+
+ lex_read_unichar(0);
+ lex_read_space(0);
+
+ Newx(curdef, 1, DefaultParamSpec);
+ curdef->next = NULL;
+ curdef->limit = param_count;
+ curdef->name = param;
+ curdef->init = NULL;
+ SAVEDESTRUCTOR_X(free_defspec, curdef);
+
+ curdef->next = *pdefaults_tail;
+ *pdefaults_tail = curdef;
+ pdefaults_tail = &curdef->next;
+
+ /* let perl parse the default parameter value */
+ curdef->init = parse_termexpr(0);
+
+ lex_read_space(0);
+ c = lex_peek_unichar(0);
+ }
+
+ /* my $param; */
+ {
+ OP *var;
+
+ var = newOP(OP_PADSV, OPf_MOD | (OPpLVAL_INTRO << 8));
+ var->op_targ = pad_add_name_sv(param, 0, NULL, NULL);
+
+ *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, newSTATEOP(0, NULL, var));
+ }
+
if (c == ',') {
lex_read_unichar(0);
lex_read_space(0);
}
if (c == -1) {
- croak("In %.*s: unexpected EOF in parameter list", (int)SvCUR(declarator), SvPV_nolen(declarator));
+ croak("In %"SVf": unexpected EOF in parameter list", SVfARG(declarator));
}
- croak("In %.*s: unexpected '%c' in parameter list", (int)SvCUR(declarator), SvPV_nolen(declarator), (int)c);
+ croak("In %"SVf": unexpected '%c' in parameter list", SVfARG(declarator), (int)c);
}
}
/* prototype */
- saw_colon = 0;
+ proto = NULL;
c = lex_peek_unichar(0);
if (c == ':') {
lex_read_unichar(0);
c = lex_peek_unichar(0);
if (c != '(') {
- saw_colon = 1;
+ lex_stuff_pvs(":", 0);
+ c = ':';
} else {
- sv = sv_2mortal(newSVpvs(""));
- if (!S_scan_str(aTHX_ sv, TRUE, TRUE)) {
- croak("In %.*s: malformed prototype", (int)SvCUR(declarator), SvPV_nolen(declarator));
+ lex_read_unichar(0);
+ if (!(proto = my_scan_parens_tail(aTHX_ FALSE))) {
+ croak("In %"SVf": prototype not terminated", SVfARG(declarator));
}
- sv_catsv(gen, sv);
+ my_check_prototype(aTHX_ declarator, proto);
lex_read_space(0);
+ c = lex_peek_unichar(0);
}
}
- if (saw_name) {
- len = SvCUR(gen);
- s = SvGROW(gen, (len + 1) * 2);
- sv_catpvs(gen, ";");
- sv_catpvn(gen, s, len);
- }
-
/* attributes */
- if (!saw_colon) {
- c = lex_peek_unichar(0);
+ Newx(attrs_sentinel, 1, OP *);
+ *attrs_sentinel = NULL;
+ SAVEDESTRUCTOR_X(free_ptr_op, attrs_sentinel);
+
+ 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 == ':') {
- saw_colon = 1;
lex_read_unichar(0);
lex_read_space(0);
- }
- }
- if (saw_colon) {
- for (;;) {
- s = PL_parser->bufptr;
- if (!(len = S_scan_word(aTHX_ s, FALSE))) {
- break;
- }
- sv_catpvs(gen, ":");
- sv_catpvn(gen, s, len);
- lex_read_to(s + len);
- lex_read_space(0);
c = lex_peek_unichar(0);
- if (c == '(') {
- sv = sv_2mortal(newSVpvs(""));
- if (!S_scan_str(aTHX_ sv, TRUE, TRUE)) {
- croak("In %.*s: malformed attribute argument list", (int)SvCUR(declarator), SvPV_nolen(declarator));
+
+ for (;;) {
+ SV *attr;
+
+ if (!(attr = my_scan_word(aTHX_ FALSE))) {
+ break;
}
- sv_catsv(gen, sv);
+
lex_read_space(0);
c = lex_peek_unichar(0);
- }
- if (c == ':') {
- lex_read_unichar(0);
- lex_read_space(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_ 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) {
+ *attrs_sentinel = op_append_elem(OP_LIST, *attrs_sentinel, newSVOP(OP_CONST, 0, SvREFCNT_inc_simple_NN(attr)));
+ }
+
+ if (c == ':') {
+ lex_read_unichar(0);
+ lex_read_space(0);
+ c = lex_peek_unichar(0);
+ }
}
}
}
/* body */
- c = lex_peek_unichar(0);
- if (c != '{') {
- croak("In %.*s: I was expecting a function body, not \"%c\"", (int)SvCUR(declarator), SvPV_nolen(declarator), (int)c);
+ if (c != '{') /* '}' - hi, vim */ {
+ croak("In %"SVf": I was expecting a function body, not \"%c\"", SVfARG(declarator), (int)c);
}
- lex_read_unichar(0);
- sv_catpvs(gen, "{");
- if (spec->shift[0]) {
- sv_catpvf(gen, "my%s=shift;", spec->shift);
+
+ /* 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,
+ newSVOP(OP_CONST, 0, SvREFCNT_inc_simple_NN(saw_name)),
+ proto ? newSVOP(OP_CONST, 0, SvREFCNT_inc_simple_NN(proto)) : NULL,
+ NULL,
+ NULL
+ );
+ }
+
+ if (builtin_attrs & MY_ATTR_LVALUE) {
+ CvLVALUE_on(PL_compcv);
}
- if (SvCUR(params)) {
- sv_catpvs(gen, "my(");
- sv_catsv(gen, params);
- sv_catpvs(gen, ")=@_;");
+ if (builtin_attrs & MY_ATTR_METHOD) {
+ CvMETHOD_on(PL_compcv);
+ }
+ if (builtin_attrs & MY_ATTR_SPECIAL) {
+ CvSPECIAL_on(PL_compcv);
}
- /* fprintf(stderr, "! [%.*s]\n", (int)(PL_bufend - PL_bufptr), PL_bufptr); */
+ /* min/max argument count checks */
+ if (spec->flags & FLAG_CHECK_NARGS) {
+ if (SvTRUE(spec->shift)) {
+ args_min++;
+ if (args_max != -1) {
+ args_max++;
+ }
+ }
- /* named sub */
- if (saw_name) {
- lex_stuff_sv(gen, SvUTF8(gen));
- *pop = parse_barestmt(0);
- return KEYWORD_PLUGIN_STMT;
+ if (args_min > 0) {
+ OP *chk, *cond, *err, *croak;
+
+ err = newSVOP(OP_CONST, 0,
+ newSVpvf("Not enough arguments for %"SVf, SVfARG(declarator)));
+
+ croak = 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, croak));
+
+ cond = newBINOP(OP_LT, 0,
+ newAVREF(newGVOP(OP_GV, 0, PL_defgv)),
+ newSVOP(OP_CONST, 0, newSViv(args_min)));
+ chk = newLOGOP(OP_AND, 0, cond, err);
+
+ *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, newSTATEOP(0, NULL, chk));
+ }
+ if (args_max != -1) {
+ OP *chk, *cond, *err, *croak;
+
+ err = newSVOP(OP_CONST, 0,
+ newSVpvf("Too many arguments for %"SVf, SVfARG(declarator)));
+
+ croak = 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, croak));
+
+ cond = newBINOP(OP_GT, 0,
+ newAVREF(newGVOP(OP_GV, 0, PL_defgv)),
+ newSVOP(OP_CONST, 0, newSViv(args_max)));
+ chk = newLOGOP(OP_AND, 0, cond, err);
+
+ *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, newSTATEOP(0, NULL, chk));
+ }
}
- /* anon sub */
- sv_catpvs(gen, "BEGIN{" MY_PKG "::_fini}");
- lex_stuff_sv(gen, SvUTF8(gen));
- *pop = parse_arithexpr(0);
- s = PL_parser->bufptr;
- if (*s != '}') {
- croak("%s: internal error: expected '}', found '%c'", MY_PKG, *s);
+ /* $self = shift; */
+ if (SvTRUE(spec->shift)) {
+ OP *var, *shift;
+
+ var = newOP(OP_PADSV, OPf_WANT_SCALAR);
+ var->op_targ = pad_findmy_sv(spec->shift, 0);
+
+ shift = newASSIGNOP(OPf_STACKED, var, 0, newOP(OP_SHIFT, 0));
+ *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, newSTATEOP(0, NULL, shift));
+ }
+
+ /* (PARAMS) = @_; */
+ if (params && av_len(params) > -1) {
+ SV *param;
+ OP *init_param, *left, *right;
+
+ left = NULL;
+ while ((param = av_shift(params)) != &PL_sv_undef) {
+ OP *const var = newOP(OP_PADSV, OPf_WANT_LIST);
+ var->op_targ = pad_findmy_sv(param, 0);
+ SvREFCNT_dec(param);
+ left = op_append_elem(OP_LIST, left, var);
+ }
+
+ left->op_flags |= OPf_PARENS;
+ right = newAVREF(newGVOP(OP_GV, 0, PL_defgv));
+ init_param = newASSIGNOP(OPf_STACKED, left, 0, right);
+ init_param = newSTATEOP(0, NULL, init_param);
+
+ *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, init_param);
+ }
+
+ /* defaults */
+ {
+ OP *gen = NULL;
+ DefaultParamSpec *dp;
+
+ for (dp = defaults; dp; dp = dp->next) {
+ OP *init = dp->init;
+ OP *var, *args, *cond;
+
+ /* var = `$,name */
+ var = newOP(OP_PADSV, 0);
+ var->op_targ = pad_findmy_sv(dp->name, 0);
+
+ /* init = `,var = ,init */
+ init = newASSIGNOP(OPf_STACKED, var, 0, init);
+
+ /* args = `@_ */
+ args = newAVREF(newGVOP(OP_GV, 0, PL_defgv));
+
+ /* cond = `,args < ,index */
+ cond = newBINOP(OP_LT, 0, args, newSVOP(OP_CONST, 0, newSViv(dp->limit)));
+
+ /* init = `,init if ,cond */
+ init = newLOGOP(OP_AND, 0, cond, init);
+
+ /* gen = `,gen ; ,init */
+ gen = op_append_list(OP_LINESEQ, gen, newSTATEOP(0, NULL, init));
+
+ dp->init = NULL;
+ }
+
+ *prelude_sentinel = op_append_list(OP_LINESEQ, *prelude_sentinel, gen);
+ }
+
+ /* 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) {
+ body = newSTATEOP(0, NULL, body);
+ }
+
+ body = op_append_list(OP_LINESEQ, *prelude_sentinel, body);
+ *prelude_sentinel = NULL;
+
+ /* it's go time. */
+ {
+ OP *const attrs = *attrs_sentinel;
+ *attrs_sentinel = NULL;
+ SvREFCNT_inc_simple_void(PL_compcv);
+
+ /* close outer block: '}' */
+ S_block_end(aTHX_ save_ix, body);
+
+ if (!saw_name) {
+ *pop = newANONATTRSUB(
+ floor_ix,
+ proto ? newSVOP(OP_CONST, 0, SvREFCNT_inc_simple_NN(proto)) : NULL,
+ attrs,
+ body
+ );
+ return KEYWORD_PLUGIN_EXPR;
+ }
+
+ newATTRSUB(
+ floor_ix,
+ newSVOP(OP_CONST, 0, SvREFCNT_inc_simple_NN(saw_name)),
+ proto ? newSVOP(OP_CONST, 0, SvREFCNT_inc_simple_NN(proto)) : NULL,
+ attrs,
+ body
+ );
+ *pop = NULL;
+ return KEYWORD_PLUGIN_STMT;
}
- lex_unstuff(s + 1);
- return KEYWORD_PLUGIN_EXPR;
}
static int my_keyword_plugin(pTHX_ char *keyword_ptr, STRLEN keyword_len, OP **op_ptr) {
- Spec spec;
+ KWSpec spec;
int ret;
SAVETMPS;
return ret;
}
-static int magic_free(pTHX_ SV *sv, MAGIC *mg) {
- lex_stuff_pvn("}", 1, 0);
- return 0;
-}
-
-static int magic_nop(pTHX_ SV *sv, MAGIC *mg) {
- return 0;
-}
-
-static MGVTBL my_vtbl = {
- 0, /* get */
- 0, /* set */
- 0, /* len */
- 0, /* clear */
- magic_free, /* free */
- 0, /* copy */
- 0, /* dup */
- magic_nop /* local */
-};
-
WARNINGS_RESET
MODULE = Function::Parameters PACKAGE = Function::Parameters
BOOT:
WARNINGS_ENABLE {
HV *const stash = gv_stashpvs(MY_PKG, GV_ADD);
- newCONSTSUB(stash, "FLAG_NAME_OPTIONAL", newSViv(FLAG_NAME_OPTIONAL));
- newCONSTSUB(stash, "FLAG_NAME_REQUIRED", newSViv(FLAG_NAME_REQUIRED));
- newCONSTSUB(stash, "FLAG_NAME_PROHIBITED", newSViv(FLAG_NAME_PROHIBITED));
+ /**/
+ 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, "HINTK_KEYWORDS", newSVpvs(HINTK_KEYWORDS));
- newCONSTSUB(stash, "HINTK_NAME_", newSVpvs(HINTK_NAME_));
+ newCONSTSUB(stash, "HINTK_FLAGS_", newSVpvs(HINTK_FLAGS_));
newCONSTSUB(stash, "HINTK_SHIFT_", newSVpvs(HINTK_SHIFT_));
- newCONSTSUB(stash, "SHIFT_NAME_LIMIT", newSViv(sizeof ((Spec *)NULL)->shift));
+ newCONSTSUB(stash, "HINTK_ATTRS_", newSVpvs(HINTK_ATTRS_));
+ /**/
next_keyword_plugin = PL_keyword_plugin;
PL_keyword_plugin = my_keyword_plugin;
} WARNINGS_RESET
-
-void
-_fini()
- CODE:
- sv_magicext((SV *)GvHV(PL_hintgv), NULL, PERL_MAGIC_ext, &my_vtbl, NULL, 0);
projects / p5sagit/Function-Parameters.git / blobdiff