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
54 #define MY_PKG "Function::Parameters"
56 #define HINTK_KEYWORDS MY_PKG "/keywords"
57 #define HINTK_NAME_ MY_PKG "/name:"
58 #define HINTK_SHIFT_ MY_PKG "/shift:"
59 #define HINTK_ATTRS_ MY_PKG "/attrs:"
61 #define HAVE_PERL_VERSION(R, V, S) \
62 (PERL_REVISION > (R) || (PERL_REVISION == (R) && (PERL_VERSION > (V) || (PERL_VERSION == (V) && (PERL_SUBVERSION >= (S))))))
66 FLAG_NAME_OPTIONAL = 1,
74 static int (*next_keyword_plugin)(pTHX_ char *, STRLEN, OP **);
76 static int kw_flags(pTHX_ const char *kw_ptr, STRLEN kw_len, Spec *spec) {
79 const char *p, *kw_active;
83 spec->shift = sv_2mortal(newSVpvs(""));
84 spec->attrs = sv_2mortal(newSVpvs(""));
86 if (!(hints = GvHV(PL_hintgv))) {
89 if (!(psv = hv_fetchs(hints, HINTK_KEYWORDS, 0))) {
93 kw_active = SvPV(sv, kw_active_len);
94 if (kw_active_len <= kw_len) {
97 for (p = kw_active; p < kw_active + kw_active_len - kw_len; p++) {
99 (p == kw_active || p[-1] == ' ') &&
101 memcmp(kw_ptr, p, kw_len) == 0
104 #define FETCH_HINTK_INTO(NAME, PTR, LEN, X) do { \
105 const char *fk_ptr_; \
108 fk_sv_ = sv_2mortal(newSVpvs(HINTK_ ## NAME)); \
109 sv_catpvn(fk_sv_, PTR, LEN); \
110 fk_ptr_ = SvPV(fk_sv_, fk_len_); \
111 if (!((X) = hv_fetch(hints, fk_ptr_, fk_len_, 0))) { \
112 croak("%s: internal error: $^H{'%.*s'} not set", MY_PKG, (int)fk_len_, fk_ptr_); \
116 FETCH_HINTK_INTO(NAME_, kw_ptr, kw_len, psv);
117 spec->name = SvIV(*psv);
119 FETCH_HINTK_INTO(SHIFT_, kw_ptr, kw_len, psv);
120 SvSetSV(spec->shift, *psv);
122 FETCH_HINTK_INTO(ATTRS_, kw_ptr, kw_len, psv);
123 SvSetSV(spec->attrs, *psv);
125 #undef FETCH_HINTK_INTO
133 #include "toke_on_crack.c.inc"
136 static int parse_fun(pTHX_ OP **pop, const char *keyword_ptr, STRLEN keyword_len, const Spec *spec) {
137 SV *gen, *declarator, *params, *sv;
139 int saw_name, saw_colon;
144 gen = sv_2mortal(newSVpvs("sub"));
145 declarator = sv_2mortal(newSVpvn(keyword_ptr, keyword_len));
146 params = sv_2mortal(newSVpvs(""));
148 line_start = CopLINE(PL_curcop);
153 s = PL_parser->bufptr;
154 if (spec->name != FLAG_NAME_PROHIBITED && (len = S_scan_word(aTHX_ s, TRUE))) {
156 sv_catpvn(gen, s, len);
157 sv_catpvs(declarator, " ");
158 sv_catpvn(declarator, s, len);
159 lex_read_to(s + len);
162 } else if (spec->name == FLAG_NAME_REQUIRED) {
163 croak("I was expecting a function name, not \"%.*s\"", (int)(PL_parser->bufend - s), s);
165 sv_catpvs(declarator, " (anon)");
169 c = lex_peek_unichar(0);
171 SV *saw_slurpy = NULL;
177 c = lex_peek_unichar(0);
178 if (c && strchr("$@%", c)) {
179 sv_catpvf(params, "%c", (int)c);
183 s = PL_parser->bufptr;
184 if (!(len = S_scan_word(aTHX_ s, FALSE))) {
185 croak("In %.*s: missing identifier", (int)SvCUR(declarator), SvPV_nolen(declarator));
188 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);
191 saw_slurpy = sv_2mortal(newSVpvf("%c%.*s", (int)c, (int)len, s));
193 sv_catpvn(params, s, len);
194 sv_catpvs(params, ",");
195 lex_read_to(s + len);
198 c = lex_peek_unichar(0);
213 croak("In %.*s: unexpected EOF in parameter list", (int)SvCUR(declarator), SvPV_nolen(declarator));
215 croak("In %.*s: unexpected '%c' in parameter list", (int)SvCUR(declarator), SvPV_nolen(declarator), (int)c);
221 c = lex_peek_unichar(0);
226 c = lex_peek_unichar(0);
230 sv = sv_2mortal(newSVpvs(""));
231 if (!S_scan_str(aTHX_ sv, TRUE, TRUE)) {
232 croak("In %.*s: malformed prototype", (int)SvCUR(declarator), SvPV_nolen(declarator));
241 s = SvGROW(gen, (len + 1) * 2);
243 sv_catpvn(gen, s, len);
247 if (SvTRUE(spec->attrs)) {
248 sv_catsv(gen, spec->attrs);
252 c = lex_peek_unichar(0);
261 s = PL_parser->bufptr;
262 if (!(len = S_scan_word(aTHX_ s, FALSE))) {
266 sv_catpvn(gen, s, len);
267 lex_read_to(s + len);
269 c = lex_peek_unichar(0);
271 sv = sv_2mortal(newSVpvs(""));
272 if (!S_scan_str(aTHX_ sv, TRUE, TRUE)) {
273 croak("In %.*s: malformed attribute argument list", (int)SvCUR(declarator), SvPV_nolen(declarator));
277 c = lex_peek_unichar(0);
287 c = lex_peek_unichar(0);
289 croak("In %.*s: I was expecting a function body, not \"%c\"", (int)SvCUR(declarator), SvPV_nolen(declarator), (int)c);
293 if (SvTRUE(spec->shift)) {
294 sv_catpvs(gen, "my");
295 sv_catsv(gen, spec->shift);
296 sv_catpvs(gen, "=shift;");
299 sv_catpvs(gen, "my(");
300 sv_catsv(gen, params);
301 sv_catpvs(gen, ")=@_;");
307 /* fprintf(stderr, "! [%.*s]\n", (int)(PL_bufend - PL_bufptr), PL_bufptr); */
308 lex_stuff_sv(gen, SvUTF8(gen));
309 *pop = parse_barestmt(0);
310 return KEYWORD_PLUGIN_STMT;
314 sv_catpvs(gen, "BEGIN{" MY_PKG "::_fini}");
315 /* fprintf(stderr, "!> [%.*s]\n", (int)(PL_bufend - PL_bufptr), PL_bufptr); */
316 lex_stuff_sv(gen, SvUTF8(gen));
317 *pop = parse_arithexpr(0);
318 s = PL_parser->bufptr;
320 croak("%s: internal error: expected '}', found '%c'", MY_PKG, *s);
323 /* fprintf(stderr, "!< [%.*s]\n", (int)(PL_bufend - PL_bufptr), PL_bufptr); */
324 return KEYWORD_PLUGIN_EXPR;
327 static int my_keyword_plugin(pTHX_ char *keyword_ptr, STRLEN keyword_len, OP **op_ptr) {
333 if (kw_flags(aTHX_ keyword_ptr, keyword_len, &spec)) {
334 ret = parse_fun(aTHX_ op_ptr, keyword_ptr, keyword_len, &spec);
336 ret = next_keyword_plugin(aTHX_ keyword_ptr, keyword_len, op_ptr);
344 static int magic_free(pTHX_ SV *sv, MAGIC *mg) {
345 lex_stuff_pvn("}", 1, 0);
346 /* fprintf(stderr, "!~ [%.*s]\n", (int)(PL_bufend - PL_bufptr), PL_bufptr); */
350 static int magic_nop(pTHX_ SV *sv, MAGIC *mg) {
354 static MGVTBL my_vtbl = {
359 magic_free, /* free */
362 magic_nop /* local */
367 MODULE = Function::Parameters PACKAGE = Function::Parameters
372 HV *const stash = gv_stashpvs(MY_PKG, GV_ADD);
373 newCONSTSUB(stash, "FLAG_NAME_OPTIONAL", newSViv(FLAG_NAME_OPTIONAL));
374 newCONSTSUB(stash, "FLAG_NAME_REQUIRED", newSViv(FLAG_NAME_REQUIRED));
375 newCONSTSUB(stash, "FLAG_NAME_PROHIBITED", newSViv(FLAG_NAME_PROHIBITED));
376 newCONSTSUB(stash, "HINTK_KEYWORDS", newSVpvs(HINTK_KEYWORDS));
377 newCONSTSUB(stash, "HINTK_NAME_", newSVpvs(HINTK_NAME_));
378 newCONSTSUB(stash, "HINTK_SHIFT_", newSVpvs(HINTK_SHIFT_));
379 newCONSTSUB(stash, "HINTK_ATTRS_", newSVpvs(HINTK_ATTRS_));
380 newCONSTSUB(stash, "SHIFT_NAME_LIMIT", newSViv(sizeof ((Spec *)NULL)->shift));
381 next_keyword_plugin = PL_keyword_plugin;
382 PL_keyword_plugin = my_keyword_plugin;
388 sv_magicext((SV *)GvHV(PL_hintgv), NULL, PERL_MAGIC_ext, &my_vtbl, NULL, 0);