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42e73e1c | 1 | =head1 NAME |
2 | ||
3 | perlexperiment - A listing of experimental features in Perl | |
4 | ||
5 | =head1 DESCRIPTION | |
6 | ||
7 | This document lists the current and past experimental features in the perl | |
d1558b3e | 8 | core. Although all of these are documented with their appropriate topics, |
42e73e1c | 9 | this succinct listing gives you an overview and basic facts about their |
10 | status. | |
11 | ||
12 | So far I've merely tried to find and list the experimental features and infer | |
d1558b3e | 13 | their inception, versions, etc. There's a lot of speculation here. |
42e73e1c | 14 | |
15 | =head2 Current experiments | |
16 | ||
17 | =over 8 | |
18 | ||
19 | =item fork() emulation | |
20 | ||
21 | Introduced in Perl 5.6.1 | |
22 | ||
23 | See also L<perlfork> | |
24 | ||
25 | =item Weak references | |
26 | ||
27 | Introduced in Perl 5.6.0 | |
28 | ||
29 | =item Internal file glob | |
30 | ||
31 | Introduced in Perl 5.6.0 | |
32 | ||
33 | Accepted in XXX | |
34 | ||
35 | =item 64-bit support | |
36 | ||
37 | Introduced in Perl 5.005 | |
38 | ||
39 | Accepted in XXX | |
40 | ||
41 | =item die accepts a reference | |
42 | ||
43 | Introduced in Perl 5.005 | |
44 | ||
706c19b7 | 45 | Accepted in Perl XXX |
42e73e1c | 46 | |
47 | =item Unicode support | |
48 | ||
49 | Introduced in Perl 5.6.0 | |
50 | ||
51 | Accepted in Perl 5.8.0 XXX | |
52 | ||
53 | =item -Dusemultiplicity -Dusethreads | |
54 | ||
55 | Introduced in Perl 5.6.0 | |
56 | ||
57 | =item Long Doubles Still Don't Work In Solaris | |
58 | ||
59 | Introduced in Perl 5.7.0 | |
60 | ||
61 | =item GetOpt::Long Options can now take multiple values at once (experimental) | |
62 | ||
63 | C<Getopt::Long> upgraded to version 2.35 | |
64 | ||
65 | Removed in Perl 5.8.8 | |
66 | ||
67 | =item 5.005-style threading | |
68 | ||
69 | Introduced in Perl 5.005 | |
70 | ||
71 | Removed in Perl 5.10 XXX | |
72 | ||
73 | =item Test::Harness::Straps | |
74 | ||
75 | Removed in Perl 5.10.1 | |
76 | ||
77 | =item perlcc | |
78 | ||
79 | Introduced in Perl 5.005 | |
80 | ||
81 | Removed in Perl 5.9.0 | |
82 | ||
42e73e1c | 83 | =item C<our> can now have an experimental optional attribute C<unique> |
84 | ||
85 | Introduced in Perl 5.8.0 | |
86 | ||
d1558b3e FC |
87 | Deprecated in Perl 5.10.0 |
88 | ||
42e73e1c | 89 | =item Assertions |
90 | ||
91 | The C<-A> command line switch | |
92 | ||
93 | Introduced in Perl 5.9.0 | |
94 | ||
95 | Removed in Perl 5.9.5 | |
96 | ||
97 | =item Linux abstract Unix domain sockets | |
98 | ||
99 | Introduced in Perl 5.9.2 | |
100 | ||
101 | See also L<Socket> | |
102 | ||
103 | =item L<Pod::HTML2Pod|Pod::HTML2Pod> | |
104 | ||
105 | =item L<Pod::PXML|Pod::PXML> | |
106 | ||
107 | =item threads | |
108 | ||
706c19b7 | 109 | =item The <:pop> IO pseudolayer |
42e73e1c | 110 | |
111 | See also L<perlrun> | |
112 | ||
706c19b7 | 113 | =item The <:win32> IO pseudolayer |
42e73e1c | 114 | |
115 | See also L<perlrun> | |
116 | ||
42e73e1c | 117 | =item MLDBM |
118 | ||
119 | See also L<perldsc> | |
120 | ||
121 | =item internal functions with M flag | |
122 | ||
123 | See also L<perlguts> | |
124 | ||
125 | =item lex_start API | |
126 | ||
127 | Introduced in Perl 5.13.7 | |
128 | ||
129 | =item internal API for C<%H> | |
130 | ||
131 | Introduced in Perl 5.13.7 | |
132 | ||
133 | See also C<cophh_> in L<perlapi>. | |
134 | ||
135 | =item av_create_and_push | |
136 | ||
137 | =item av_create_and_unshift_one | |
138 | ||
139 | =item av_create_and_unshift_one | |
140 | ||
141 | =item PL_keyword_plugin | |
142 | ||
143 | =item hv_iternext_flags | |
144 | ||
145 | =item lex_bufutf8 | |
146 | ||
147 | =item lex_discard_to | |
148 | ||
149 | =item lex_grow_linestr | |
150 | ||
151 | =item lex_next_chunk | |
152 | ||
153 | =item lex_peek_unichar | |
154 | ||
155 | =item lex_read_space | |
156 | ||
157 | =item lex_read_to | |
158 | ||
159 | =item lex_read_unichar | |
160 | ||
161 | =item lex_stuff_pv | |
162 | ||
163 | =item lex_stuff_pvn | |
164 | ||
165 | =item lex_stuff_pvs | |
166 | ||
167 | =item lex_stuff_sv | |
168 | ||
169 | =item lex_unstuff | |
170 | ||
171 | =item parse_fullstmt | |
172 | ||
173 | =item parse_stmtseq | |
174 | ||
175 | =item PL_parser-E<gt>bufend | |
176 | ||
177 | =item PL_parser-E<gt>bufptr | |
178 | ||
179 | =item PL_parser-E<gt>linestart | |
180 | ||
181 | =item PL_parser-E<gt>linestr | |
182 | ||
183 | =item Perl_signbit | |
184 | ||
185 | =item pad_findmy | |
186 | ||
187 | =item sv_utf8_decode | |
188 | ||
189 | =item sv_utf8_downgrade | |
190 | ||
191 | =item bytes_from_utf8 | |
192 | ||
193 | =item bytes_to_utf8 | |
194 | ||
195 | =item utf8_to_bytes | |
196 | ||
197 | =item DB module | |
198 | ||
199 | Introduced in Perl 5.6.0 | |
200 | ||
201 | See also L<perldebug>, L<perldebtut> | |
202 | ||
203 | =item The pseudo-hash data type | |
204 | ||
205 | Introduced in Perl 5.6.0 | |
206 | ||
207 | =item Lvalue subroutines | |
208 | ||
209 | Introduced in Perl 5.6.0 | |
210 | ||
211 | See also L<perlsub> | |
212 | ||
213 | =item There is an C<installhtml> target in the Makefile. | |
214 | ||
215 | =item Unicode in Perl on EBCDIC | |
216 | ||
217 | =item C<(?{code})> | |
218 | ||
219 | See also L<perlre> | |
220 | ||
221 | =item C<(??{ code })> | |
222 | ||
223 | See also L<perlre> | |
224 | ||
225 | =item Backtracking control verbs | |
226 | ||
227 | C<(*ACCEPT)> | |
228 | ||
229 | Introduced in: Perl 5.10 | |
230 | ||
231 | See also: L<perlre/"Special Backtracking Control Verbs"> | |
232 | ||
233 | =item Code expressions, conditional expressions, and independent expressions in regexes | |
234 | ||
235 | =item The C<\N> regex character class | |
236 | ||
237 | The C<\N> character class, not to be confused with the named character | |
238 | sequence C<\N{NAME}>, denotes any non-newline character in a regular | |
239 | expression. | |
240 | ||
241 | Introduced in: Perl 5.12 | |
242 | ||
243 | See also: | |
244 | ||
245 | =item gv_try_downgrade | |
246 | ||
247 | See also L<perlintern> | |
248 | ||
249 | =item Experimental Support for Sun Studio Compilers for Linux OS | |
250 | ||
251 | See also L<perllinux> | |
252 | ||
253 | =item Pluggable keywords | |
254 | ||
255 | See L<perlapi/PL_keyword_plugin> for the mechanism. | |
256 | ||
257 | Introduced in: Perl 5.11.2 | |
258 | ||
259 | =back | |
260 | ||
261 | =head2 Accepted features | |
262 | ||
263 | These features were so wildly successful and played so well with others that | |
264 | we decided to remove their experimental status and admit them as full, stable | |
265 | features in the world of Perl, lavishing all the benefits and luxuries thereof. | |
266 | They are also awarded +5 Stability and +3 Charisma. | |
267 | ||
268 | =over 8 | |
269 | ||
270 | =item (none yet identified) | |
271 | ||
272 | =back | |
273 | ||
274 | =head2 Removed features | |
275 | ||
276 | These features are no longer considered experimental and their functionality | |
277 | has disappeared. It's your own fault if you wrote production programs using | |
278 | these features after we explicitly told you not to (see L<perlpolicy>). | |
279 | ||
280 | =over 8 | |
281 | ||
282 | =item C<legacy> | |
283 | ||
284 | The experimental C<legacy> pragma was swallowed by the C<feature> pragma. | |
285 | ||
286 | Introduced in: 5.11.2 | |
287 | ||
288 | Removed in: 5.11.3 | |
289 | ||
290 | =back | |
291 | ||
292 | =head1 AUTHORS | |
293 | ||
294 | brian d foy C<< <brian.d.foy@gmail.com> >> | |
295 | ||
296 | =head1 COPYRIGHT | |
297 | ||
298 | Copyright 2010, brian d foy C<< <brian.d.foy@gmail.com> >> | |
299 | ||
300 | =head1 LICENSE | |
301 | ||
302 | You can use and redistribute this document under the same terms as Perl | |
303 | itself. | |
304 | ||
305 | =cut |