#include "toke_on_crack.c.inc"
+static void free_ptr_op(void *vp) {
+ OP **pp = vp;
+ op_free(*pp);
+ Safefree(pp);
+}
+
+#define sv_eq_pvs(SV, S) sv_eq_pvn(SV, "" S "", sizeof (S) - 1)
+
+static int sv_eq_pvn(SV *sv, const char *p, STRLEN n) {
+ STRLEN sv_len;
+ const char *sv_p = SvPV(sv, sv_len);
+ return
+ sv_len == n &&
+ memcmp(sv_p, p, n) == 0
+ ;
+}
+
+
+#include "padop_on_crack.c.inc"
+
+
+#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 int parse_fun(pTHX_ OP **pop, const char *keyword_ptr, STRLEN keyword_len, const Spec *spec) {
- SV *gen, *declarator, *params, *sv;
- int saw_name, saw_colon;
+ SV *declarator;
+ I32 floor_ix;
+ SV *saw_name;
+ AV *params;
+ SV *proto;
+ OP **attrs_sentinel, *body;
+ unsigned builtin_attrs;
+ int saw_colon;
STRLEN len;
char *s;
I32 c;
- gen = sv_2mortal(newSVpvs("sub"));
declarator = sv_2mortal(newSVpvn(keyword_ptr, keyword_len));
- params = sv_2mortal(newSVpvs(""));
lex_read_space(0);
+ builtin_attrs = 0;
+
/* function name */
- saw_name = 0;
+ saw_name = NULL;
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 = sv_2mortal(newSVpvn_flags(s, len, PARSING_UTF ? SVf_UTF8 : 0));
+
+ if (PL_parser->expect != XSTATE) {
+ /* bail out early so we don't predeclare $saw_name */
+ croak("In %"SVf": I was expecting a function body, not \"%"SVf"\"", SVfARG(declarator), SVfARG(saw_name));
+ }
+
sv_catpvs(declarator, " ");
- sv_catpvn(declarator, s, len);
+ sv_catsv(declarator, saw_name);
+
+ if (
+ sv_eq_pvs(saw_name, "BEGIN") ||
+ sv_eq_pvs(saw_name, "END") ||
+ sv_eq_pvs(saw_name, "INIT") ||
+ sv_eq_pvs(saw_name, "CHECK") ||
+ sv_eq_pvs(saw_name, "UNITCHECK")
+ ) {
+ builtin_attrs |= MY_ATTR_SPECIAL;
+ }
+
lex_read_to(s + len);
lex_read_space(0);
- saw_name = 1;
} else if (spec->name == FLAG_NAME_REQUIRED) {
croak("I was expecting a function name, not \"%.*s\"", (int)(PL_parser->bufend - s), s);
} else {
sv_catpvs(declarator, " (anon)");
}
+ floor_ix = start_subparse(FALSE, saw_name ? 0 : CVf_ANON);
+ SAVEFREESV(PL_compcv);
+
/* parameters */
+ params = NULL;
c = lex_peek_unichar(0);
if (c == '(') {
SV *saw_slurpy = NULL;
lex_read_unichar(0);
lex_read_space(0);
+ params = newAV();
+ sv_2mortal((SV *)params);
+
for (;;) {
c = lex_peek_unichar(0);
if (c == '$' || c == '@' || c == '%') {
- sv_catpvf(params, "%c", (int)c);
+ SV *param;
+
lex_read_unichar(0);
lex_read_space(0);
if (!(len = S_scan_word(aTHX_ s, FALSE))) {
croak("In %"SVf": missing identifier", SVfARG(declarator));
}
+ param = sv_2mortal(newSVpvf("%c%.*s", (int)c, (int)len, s));
if (saw_slurpy) {
- croak("In %"SVf": I was expecting \")\" after \"%"SVf"\", not \"%c%.*s\"", SVfARG(declarator), SVfARG(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));
+ saw_slurpy = param;
}
- sv_catpvn(params, s, len);
- sv_catpvs(params, ",");
+ av_push(params, SvREFCNT_inc_simple_NN(param));
lex_read_to(s + len);
lex_read_space(0);
}
/* prototype */
+ proto = NULL;
saw_colon = 0;
c = lex_peek_unichar(0);
if (c == ':') {
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)) {
+ proto = sv_2mortal(newSVpvs(""));
+ if (!S_scan_str(aTHX_ proto, FALSE, FALSE)) {
croak("In %"SVf": prototype not terminated", SVfARG(declarator));
}
- sv_catsv(gen, sv);
+ S_check_prototype(declarator, proto);
lex_read_space(0);
+ c = lex_peek_unichar(0);
}
}
+ /* surprise predeclaration! */
if (saw_name) {
- len = SvCUR(gen);
- s = SvGROW(gen, (len + 1) * 2);
- sv_catpvs(gen, ";");
- sv_catpvn(gen, s, len);
+ /* 'sub NAME (PROTO);' to make name/proto known to perl before it
+ starts parsing the body */
+ SvREFCNT_inc_simple_void(PL_compcv);
+
+ newATTRSUB(
+ floor_ix,
+ newSVOP(OP_CONST, 0, SvREFCNT_inc_simple_NN(saw_name)),
+ proto ? newSVOP(OP_CONST, 0, SvREFCNT_inc_simple_NN(proto)) : NULL,
+ NULL,
+ NULL
+ );
+
+ floor_ix = start_subparse(FALSE, 0);
+ SAVEFREESV(PL_compcv);
}
+
/* attributes */
- if (SvTRUE(spec->attrs)) {
- sv_catsv(gen, spec->attrs);
- }
+ Newx(attrs_sentinel, 1, OP *);
+ *attrs_sentinel = NULL;
+ SAVEDESTRUCTOR(free_ptr_op, attrs_sentinel);
+
+ if (c == ':' || c == '{') {
+
+ /* kludge default attributes in */
+ if (SvTRUE(spec->attrs) && SvPV_nolen(spec->attrs)[0] == ':') {
+ lex_stuff_sv(spec->attrs, 0);
+ c = ':';
+ }
- if (!saw_colon) {
- c = lex_peek_unichar(0);
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 %"SVf": unterminated attribute parameter in attribute list", SVfARG(declarator));
+
+ for (;;) {
+ SV *attr;
+
+ s = PL_parser->bufptr;
+ if (!(len = S_scan_word(aTHX_ s, FALSE))) {
+ break;
}
- sv_catsv(gen, sv);
+
+ attr = sv_2mortal(newSVpvn_flags(s, len, PARSING_UTF ? SVf_UTF8 : 0));
+
+ lex_read_to(s + len);
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 = sv_2mortal(newSVpvs(""));
+ if (!S_scan_str(aTHX_ sv, TRUE, TRUE)) {
+ croak("In %"SVf": unterminated attribute parameter in attribute list", SVfARG(declarator));
+ }
+ sv_catsv(attr, sv);
+
+ 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 %"SVf": I was expecting a function body, not \"%c\"", SVfARG(declarator), (int)c);
}
- lex_read_unichar(0);
- sv_catpvs(gen, "{");
- if (SvTRUE(spec->shift)) {
- sv_catpvs(gen, "my");
- sv_catsv(gen, spec->shift);
- sv_catpvs(gen, "=shift;");
+
+ 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);
}
- /* named sub */
- if (saw_name) {
- /* fprintf(stderr, "! [%.*s]\n", (int)(PL_bufend - PL_bufptr), PL_bufptr); */
- lex_stuff_sv(gen, SvUTF8(gen));
- *pop = parse_barestmt(0);
- return KEYWORD_PLUGIN_STMT;
+ /* munge */
+ {
+ /* create outer block: '{' */
+ const int save_ix = S_block_start(TRUE);
+ OP *init = NULL;
+
+ /* my $self = shift; */
+ if (SvTRUE(spec->shift)) {
+ OP *const var = newOP(OP_PADSV, OPf_WANT_SCALAR | (OPpLVAL_INTRO << 8));
+ var->op_targ = pad_add_name_sv(spec->shift, 0, NULL, NULL);
+
+ init = newASSIGNOP(OPf_STACKED, var, 0, newOP(OP_SHIFT, 0));
+ init = newSTATEOP(0, NULL, init);
+ }
+
+ /* my (PARAMS) = @_; */
+ if (params && av_len(params) > -1) {
+ SV *param;
+ OP *init_param, *left, *right;
+
+ left = NULL;
+ while ((param = av_shift(params)) != &PL_sv_undef) {
+ OP *const var = newOP(OP_PADSV, OPf_WANT_LIST | (OPpLVAL_INTRO << 8));
+ var->op_targ = pad_add_name_sv(param, 0, NULL, NULL);
+ SvREFCNT_dec(param);
+ left = op_append_elem(OP_LIST, left, var);
+ }
+
+ left->op_flags |= OPf_PARENS;
+ right = newAVREF(newGVOP(OP_GV, 0, PL_defgv));
+ init_param = newASSIGNOP(OPf_STACKED, left, 0, right);
+ init_param = newSTATEOP(0, NULL, init_param);
+
+ init = op_append_list(OP_LINESEQ, init, init_param);
+ }
+
+ /* add '();' to make function return nothing by default */
+ /* (otherwise the invisible parameter initialization can "leak" into
+ the return value: fun ($x) {}->("asdf", 0) == 2) */
+ if (init) {
+ init = op_append_list(OP_LINESEQ, init, newSTATEOP(0, NULL, newOP(OP_STUB, OPf_PARENS)));
+ }
+
+ /* finally let perl parse the actual subroutine body */
+ body = parse_block(0);
+
+ body = op_append_list(OP_LINESEQ, init, body);
+
+ /* close outer block: '}' */
+ S_block_end(save_ix, body);
}
- /* anon sub */
- sv_catpvs(gen, "BEGIN{" MY_PKG "::_fini}");
- /* fprintf(stderr, "!> [%.*s]\n", (int)(PL_bufend - PL_bufptr), PL_bufptr); */
- 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);
+ /* it's go time. */
+ {
+ OP *const attrs = *attrs_sentinel;
+ *attrs_sentinel = NULL;
+ SvREFCNT_inc_simple_void(PL_compcv);
+
+ 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);
- /* fprintf(stderr, "!< [%.*s]\n", (int)(PL_bufend - PL_bufptr), PL_bufptr); */
- return KEYWORD_PLUGIN_EXPR;
}
static int my_keyword_plugin(pTHX_ char *keyword_ptr, STRLEN keyword_len, OP **op_ptr) {
return ret;
}
-static int magic_free(pTHX_ SV *sv, MAGIC *mg) {
- lex_stuff_pvn("}", 1, 0);
- /* fprintf(stderr, "!~ [%.*s]\n", (int)(PL_bufend - PL_bufptr), PL_bufptr); */
- 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
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