This is a live mirror of the Perl 5 development currently hosted at
typo in perlguts.pod
[perl5.git] / pod / perltodo.pod
1=head1 NAME
3perltodo - Perl TO-DO List
e50bb9a1 6
722d2a37 7This is a list of wishes for Perl. Send updates to
8I<>. If you want to work on any of these
9projects, be sure to check the perl5-porters archives for past ideas,
10flames, and propaganda. This will save you time and also prevent you
11from implementing something that Larry has already vetoed. One set
12of archives may be found at:
722d2a37 16=head1 To do during 5.6.x
e50bb9a1 17
722d2a37 18=head2 Support for I/O disciplines
e50bb9a1 19
20C<perlio> provides this, but the interface could be a lot more
e50bb9a1 22
722d2a37 23=head2 Eliminate need for "use utf8";
e50bb9a1 24
25While the C<utf8> pragma is autoloaded when necessary, it's still needed
26for things like Unicode characters in a source file. The UTF8 hint can
27always be set to true, but it needs to be set to false when F<>
28is being compiled. (To stop Perl trying to autoload the C<utf8>
e50bb9a1 30
722d2a37 31=head2 Autoload
e50bb9a1 32
33When the lexer sees, for instance, C<bytes::length>, it should
34automatically load the C<bytes> pragma.
e50bb9a1 35
722d2a37 36=head2 Make "\u{XXXX}" et al work
e50bb9a1 37
38Danger, Will Robinson! Discussing the semantics of C<"\x{F00}">,
39C<"\xF00"> and C<"\U{F00}"> on P5P I<will> lead to a long and boring
e50bb9a1 41
722d2a37 42=head2 Overloadable regex assertions
e50bb9a1 43
44This may or may not be possible with the current regular expression
45engine. The idea is that, for instance, C<\b> needs to be
46algorithmically computed if you're dealing with Thai text. Hence, the
47B<\b> assertion wants to be overloaded by a function.
e50bb9a1 48
722d2a37 49=head2 Unicode collation and normalization
e50bb9a1 50
722d2a37 51Simon Cozens promises to work on this.
e50bb9a1 52
53 Collation?
54 Normalization?
e50bb9a1 55
722d2a37 56=head2 Unicode case mappings
e50bb9a1 57
722d2a37 58 Case Mappings?
e50bb9a1 59
722d2a37 60=head2 Unicode regular expression character classes
e50bb9a1 61
722d2a37 62They have some tricks Perl doesn't yet implement.
e50bb9a1 63
722d2a37 64
e50bb9a1 65
722d2a37 66=head2 use Thread for iThreads
e50bb9a1 67
68Artur Bergman's C<iThreads> module is a start on this, but needs to
69be more mature.
e50bb9a1 70
722d2a37 71=head2 Work out exit/die semantics for threads
e50bb9a1 72
722d2a37 73=head2 Typed lexicals for compiler
e50bb9a1 74
722d2a37 75=head2 Compiler workarounds for Win32
e50bb9a1 76
722d2a37 77=head2 AUTOLOADing in the compiler
e50bb9a1 78
722d2a37 79=head2 Fixing comppadlist when compiling
e50bb9a1 80
722d2a37 81=head2 Cleaning up exported namespace
e50bb9a1 82
722d2a37 83=head2 Complete signal handling
e50bb9a1 84
85Add C<PERL_ASYNC_CHECK> to opcodes which loop; replace C<sigsetjmp> with
86C<sigjmp>; check C<wait> for signal safety.
e50bb9a1 87
722d2a37 88=head2 Out-of-source builds
e50bb9a1 89
722d2a37 90This was done for 5.6.0, but needs reworking for 5.7.x
e50bb9a1 91
722d2a37 92=head2 POSIX realtime support
e50bb9a1 93
94POSIX 1003.1 1996 Edition support--realtime stuff: POSIX semaphores,
95message queues, shared memory, realtime clocks, timers, signals (the
96metaconfig units mostly already exist for these)
e50bb9a1 97
722d2a37 98=head2 UNIX98 support
e50bb9a1 99
722d2a37 100Reader-writer locks, realtime/asynchronous IO
e50bb9a1 101
722d2a37 102=head2 IPv6 Support
e50bb9a1 103
104There are non-core modules, such as C<Net::IPv6>, but these will need
105integrating when IPv6 actually starts to really happen. See RFC 2292
106and RFC 2553.
e50bb9a1 107
722d2a37 108=head2 Long double conversion
e50bb9a1 109
722d2a37 110Floating point formatting is still causing some weird test failures.
e50bb9a1 111
722d2a37 112=head2 Locales
e50bb9a1 113
114Locales and Unicode interact with each other in unpleasant ways.
115One possible solution would be to adopt/support ICU:
e50bb9a1 116
722d2a37 117
e50bb9a1 118
722d2a37 119=head2 Thread-safe regexes
e50bb9a1 120
722d2a37 121The regular expression engine is currently non-threadsafe.
e50bb9a1 122
722d2a37 123=head2 Arithmetic on non-Arabic numerals
e50bb9a1 124
722d2a37 125C<[1234567890]> aren't the only numerals any more.
e50bb9a1 126
722d2a37 127=head2 POSIX Unicode character classes
e50bb9a1 128
129([=a=] for equivalance classes, [.ch.] for collation.)
130These are dependent on Unicode normalization and collation.
e50bb9a1 131
722d2a37 132=head2 Factoring out common suffices/prefices in regexps (trie optimization)
c47ff5f1 133
134Currently, the user has to optimize C<foo|far> and C<foo|goo> into
135C<f(?:oo|ar)> and C<[fg]oo> by hand; this could be done automatically.
e50bb9a1 136
722d2a37 137=head2 Security audit shipped utilities
e50bb9a1 138
139All the code we ship with Perl needs to be sensible about temporary file
140handling, locking, input validation, and so on.
e50bb9a1 141
722d2a37 142=head2 Custom opcodes
e50bb9a1 143
144Have a way to introduce user-defined opcodes without the subroutine call
145overhead of an XSUB; the user should be able to create PP code. Simon
146Cozens has some ideas on this.
e50bb9a1 147
722d2a37 148=head2 spawnvp() on Win32
e50bb9a1 149
150Win32 has problems spawning processes, particularly when the arguments
151to the child process contain spaces, quotes or tab characters.
e50bb9a1 152
722d2a37 153=head2 DLL Versioning
e50bb9a1 154
155Windows needs a way to know what version of a XS or C<libperl> DLL it's
e50bb9a1 157
722d2a37 158=head2 Introduce @( and @)
e50bb9a1 159
160C<$(> may return "foo bar baz". Unfortunately, since groups can
161theoretically have spaces in their names, this could be one, two or
162three groups.
e50bb9a1 163
722d2a37 164=head2 Floating point handling
e50bb9a1 165
166C<NaN> and C<inf> support is particularly troublesome.
167(fp_classify(), fp_class(), fp_class_d(), class(), isinf(),
168isfinite(), finite(), isnormal(), unordered(), <ieeefp.h>,
169<fp_class.h> (there are metaconfig units for all these) (I think),
170fp_setmask(), fp_getmask(), fp_setround(), fp_getround()
171(no metaconfig units yet for these). Don't forget finitel(), fp_classl(),
172fp_class_l(), (yes, both do, unfortunately, exist), and unorderedl().)
e50bb9a1 173
722d2a37 174As of Perl 5.6.1 is a Perl macro, Perl_isnan().
e50bb9a1 175
722d2a37 176=head2 IV/UV preservation
e50bb9a1 177
178Nicholas Clark has done a lot of work on this, but work is continuing.
179C<+>, C<-> and C<*> work, but guards need to be in place for C<%>, C</>,
180C<&>, C<oct>, C<hex> and C<pack>.
e50bb9a1 181
722d2a37 182=head2 Replace pod2html with something using Pod::Parser
83df6a1d 183
184The CPAN module C<Malik::Pod::Html> may be a more suitable basis for a
185C<pod2html> convertor; the current one duplicates the functionality
186abstracted in C<Pod::Parser>, which makes updating the POD language
e50bb9a1 188
722d2a37 189=head2 Automate module testing on CPAN
e50bb9a1 190
191When a new Perl is being beta tested, porters have to manually grab
192their favourite CPAN modules and test them - this should be done
e50bb9a1 194
722d2a37 195=head2 sendmsg and recvmsg
83df6a1d 196
197We have all the other BSD socket functions but these. There are
198metaconfig units for these functions which can be added. To avoid these
199being new opcodes, a solution similar to the way C<sockatmark> was added
200would be preferable. (Autoload the C<IO::whatever> module.)
e50bb9a1 201
722d2a37 202=head2 Rewrite perlre documentation
e50bb9a1 203
204The new-style patterns need full documentation, and the whole document
205needs to be a lot clearer.
e50bb9a1 206
722d2a37 207=head2 Convert example code to IO::Handle filehandles
e50bb9a1 208
722d2a37 209=head2 Document Win32 choices
e50bb9a1 210
722d2a37 211=head2 Check new modules
e50bb9a1 212
722d2a37 213=head2 Make roffitall find pods and libs itself
e50bb9a1 214
722d2a37 215Simon Cozens has done some work on this but it needs a rethink.
e50bb9a1 216
722d2a37 217=head1 To do at some point
e50bb9a1 218
219These are ideas that have been regularly tossed around, that most
220people believe should be done maybe during 5.8.x
e50bb9a1 221
722d2a37 222=head2 Remove regular expression recursion
e50bb9a1 223
224Because the regular expression engine is recursive, badly designed
225expressions can lead to lots of recursion filling up the stack. Ilya
226claims that it is easy to convert the engine to being iterative, but
227this has still not yet been done. There may be a regular expression
228engine hit squad meeting at TPC5.
e50bb9a1 229
722d2a37 230=head2 Memory leaks after failed eval
e50bb9a1 231
232Perl will leak memory if you C<eval "hlagh hlagh hlagh hlagh">. This is
233partially because it attempts to build up an op tree for that code and
234doesn't properly free it. The same goes for non-syntactically-correct
235regular expressions. Hugo looked into this, but decided it needed a
236mark-and-sweep GC implementation.
e50bb9a1 237
238Alan notes that: The basic idea was to extend the parser token stack
239(C<YYSTYPE>) to include a type field so we knew what sort of thing each
240element of the stack was. The F<<perly.c> code would then have to be
241postprocessed to record the type of each entry on the stack as it was
242created, and the parser patched so that it could unroll the stack
243properly on error.
e50bb9a1 244
245This is possible to do, but would be pretty messy to implement, as it
246would rely on even more sed hackery in F<perly.fixer>.
e50bb9a1 247
722d2a37 248=head2 pack "(stuff)*"
e50bb9a1 249
722d2a37 250That's to say, C<pack "(sI)40"> would be the same as C<pack "sI"x40>
e50bb9a1 251
722d2a37 252=head2 bitfields in pack
e50bb9a1 253
722d2a37 254=head2 Cross compilation
e50bb9a1 255
256Make Perl buildable with a cross-compiler. This will play havoc with
257Configure, which needs to how how the target system will respond to
258its tests; maybe C<microperl> will be a good starting point here.
259(Indeed, Bart Schuller reports that he compiled up C<microperl> for
260the Agenda PDA and it works fine.) A really big spanner in the works
261is the bootstrapping build process of Perl: if the filesystem the
262target systems sees is not the same what the build host sees, various
263input, output, and (Perl) library files need to be copied back and forth.
e50bb9a1 264
722d2a37 265=head2 Perl preprocessor / macros
e50bb9a1 266
267Source filters help with this, but do not get us all the way. For
268instance, it should be possible to implement the C<??> operator somehow;
269source filters don't (quite) cut it.
e50bb9a1 270
722d2a37 271=head2 Perl lexer in Perl
a45bd81d 272
722d2a37 273Damian Conway is planning to work on this, but it hasn't happened yet.
e50bb9a1 274
722d2a37 275=head2 Using POSIX calls internally
e50bb9a1 276
277When faced with a BSD vs. SySV -style interface to some library or
278system function, perl's roots show in that it typically prefers the BSD
279interface (but falls back to the SysV one). One example is getpgrp().
280Other examples include C<memcpy> vs. C<bcopy>. There are others, mostly in
e50bb9a1 282
283Mostly, this item is a suggestion for which way to start a journey into
284an C<#ifdef> forest. It is not primarily a suggestion to eliminate any of
285the C<#ifdef> forests.
e50bb9a1 286
287POSIX calls are perhaps more likely to be portable to unexpected
288architectures. They are also perhaps more likely to be actively
289maintained by a current vendor. They are also perhaps more likely to be
290available in thread-safe versions, if appropriate.
e50bb9a1 291
722d2a37 292=head2 -i rename file when changed
e50bb9a1 293
294It's only necessary to rename a file when inplace editing when the file
295has changed. Detecting a change is perhaps the difficult bit.
e50bb9a1 296
722d2a37 297=head2 All ARGV input should act like E<lt>E<gt>
e50bb9a1 298
722d2a37 299=head2 Support for rerunning debugger
e50bb9a1 300
722d2a37 301There should be a way of restarting the debugger on demand.
e50bb9a1 302
722d2a37 303=head2 my sub foo { }
c47ff5f1 304
305The basic principle is sound, but there are problems with the semantics
306of self-referential and mutually referential lexical subs: how to
307declare the subs?
c47ff5f1 308
722d2a37 309=head2 One-pass global destruction
c47ff5f1 310
311Sweeping away all the allocated memory in one go is a laudable goal, but
312it's difficult and in most cases, it's easier to let the memory get
313freed by exiting.
e50bb9a1 314
722d2a37 315=head2 Rewrite regexp parser
e50bb9a1 316
317There has been talk recently of rewriting the regular expression parser
318to produce an optree instead of a chain of opcodes; it's unclear whether
319or not this would be a win.
e50bb9a1 320
722d2a37 321=head2 Cache recently used regexps
e50bb9a1 322
722d2a37 323This is to speed up
e50bb9a1 324
325 for my $re (@regexps) {
326 $matched++ if /$re/
327 }
e50bb9a1 328
329C<qr//> already gives us a way of saving compiled regexps, but it should
330be done automatically.
e50bb9a1 331
722d2a37 332=head2 Re-entrant functions
e50bb9a1 333
334Add configure probes for C<_r> forms of system calls and fit them to the
335core. Unfortunately, calling conventions for these functions and not
04c70446 337
722d2a37 338=head2 Cross-compilation support
04c70446 339
340Bart Schuller reports that using C<microperl> and a cross-compiler, he
341got Perl working on the Agenda PDA. However, one cannot build a full
342Perl because Configure needs to get the results for the target platform,
343for the host.
e50bb9a1 344
722d2a37 345=head2 Bit-shifting bitvectors
e50bb9a1 346
722d2a37 347Given:
e50bb9a1 348
722d2a37 349 vec($v, 1000, 1) = 1;
e50bb9a1 350
722d2a37 351One should be able to do
e50bb9a1 352
722d2a37 353 $v <<= 1;
e50bb9a1 354
722d2a37 355and have the 999'th bit set.
e50bb9a1 356
357Currently if you try with shift bitvectors you shift the NV/UV, instead
358of the bits in the PV. Not very logical.
e50bb9a1 359
722d2a37 360=head2 debugger pragma
e50bb9a1 361
362The debugger is implemented in Perl in F<>; turning it into a
363pragma should be easy, but making it work lexically might be more
364difficult. Fiddling with C<$^P> would be necessary.
e50bb9a1 365
722d2a37 366=head2 use less pragma
e50bb9a1 367
368Identify areas where speed/memory tradeoffs can be made and have a hint
369to switch between them.
e50bb9a1 370
722d2a37 371=head2 switch structures
e50bb9a1 372
373Although we have C<> in core, Larry points to the dormant
374C<nswitch> and C<cswitch> ops in F<pp.c>; using these opcodes would be
375much faster.
e50bb9a1 376
722d2a37 377=head2 Cache eval tree
e50bb9a1 378
722d2a37 379=head2 rcatmaybe
e50bb9a1 380
722d2a37 381=head2 Shrink opcode tables
e50bb9a1 382
722d2a37 383=head2 Optimize away @_
e50bb9a1 384
722d2a37 385Look at the "reification" code in C<av.c>
e50bb9a1 386
722d2a37 387=head2 Prototypes versus indirect objects
e50bb9a1 388
722d2a37 389Currently, indirect object syntax bypasses prototype checks.
e50bb9a1 390
722d2a37 391=head2 Install HMTL
e50bb9a1 392
393HTML versions of the documentation need to be installed by default; a
394call to C<installhtml> from C<installperl> may be all that's necessary.
e50bb9a1 395
722d2a37 396=head2 Prototype method calls
e50bb9a1 397
722d2a37 398=head2 Return context prototype declarations
e50bb9a1 399
722d2a37 400=head2 magic_setisa
e50bb9a1 401
722d2a37 402=head2 Garbage collection
e50bb9a1 403
404There have been persistent mumblings about putting a mark-and-sweep
405garbage detector into Perl; Alan Burlison has some ideas about this.
e50bb9a1 406
722d2a37 407=head2 IO tutorial
e50bb9a1 408
722d2a37 409Mark-Jason Dominus has the beginnings of one of these.
e50bb9a1 410
722d2a37 411=head2 pack/unpack tutorial
e50bb9a1 412
722d2a37 413Simon Cozens has the beginnings of one of these.
e50bb9a1 414
722d2a37 415=head2 Rewrite perldoc
e50bb9a1 416
417There are a few suggestions for what to do with C<perldoc>: maybe a
418full-text search, an index function, locating pages on a particular
419high-level subject, and so on.
e50bb9a1 420
3958b146 421=head2 Install .3p manpages
e50bb9a1 422
3958b146 423This is a bone of contention; we can create C<.3p> manpages for each
424built-in function, but should we install them by default? Tcl does this,
425and it clutters up C<apropos>.
e50bb9a1 426
722d2a37 427=head2 Unicode tutorial
e50bb9a1 428
722d2a37 429Simon Cozens promises to do this before he gets old.
e50bb9a1 430
722d2a37 431=head2 Update for 1003.1-2
3958b146 432
722d2a37 433=head2 Retargetable installation
e50bb9a1 434
722d2a37 435Allow C<@INC> to be changed after Perl is built.
e50bb9a1 436
722d2a37 437=head2 POSIX emulation on non-POSIX systems
e50bb9a1 438
439Make C<> behave as POSIXly as possible everywhere, meaning we
440have to implement POSIX equivalents for some functions if necessary.
e50bb9a1 441
722d2a37 442=head2 Rename Win32 headers
e50bb9a1 443
444=head2 Finish off lvalue functions
446They don't work in the debugger, and they don't work for list or hash
e50bb9a1 448
722d2a37 449=head2 Update sprintf documentation
e50bb9a1 450
722d2a37 451Hugo van der Sanden plans to look at this.
e50bb9a1 452
722d2a37 453=head2 Use fchown/fchmod internally
e50bb9a1 454
455This has been done in places, but needs a thorough code review.
456Also fchdir is available in some platforms.
e50bb9a1 457
722d2a37 458=head1 Vague ideas
e50bb9a1 459
722d2a37 460Ideas which have been discussed, and which may or may not happen.
e50bb9a1 461
722d2a37 462=head2 ref() in list context
e50bb9a1 463
464It's unclear what this should do or how to do it without breaking old
e50bb9a1 466
722d2a37 467=head2 Make tr/// return histogram
e50bb9a1 468
722d2a37 469There is a patch for this, but it may require Unicodification.
e50bb9a1 470
722d2a37 471=head2 Compile to real threaded code
3958b146 472
722d2a37 473=head2 Structured types
3958b146 474
722d2a37 475=head2 Modifiable $1 et al.
e50bb9a1 476
477 ($x = "elephant") =~ /e(ph)/;
478 $1 = "g"; # $x = "elegant"
e50bb9a1 479
480What happens if there are multiple (nested?) brackets? What if the
481string changes between the match and the assignment?
e50bb9a1 482
722d2a37 483=head2 Procedural interfaces for IO::*, etc.
e50bb9a1 484
485Some core modules have been accused of being overly-OO. Adding
486procedural interfaces could demystify them.
e50bb9a1 487
722d2a37 488=head2 RPC modules
e50bb9a1 489
722d2a37 490=head2 Attach/detach debugger from running program
e50bb9a1 491
492With C<gdb>, you can attach the debugger to a running program if you
493pass the process ID. It would be good to do this with the Perl debugger
494on a running Perl program, although I'm not sure how it would be done.
e50bb9a1 495
722d2a37 496=head2 Alternative RE syntax module
e50bb9a1 497
498 use Regex::Newbie;
499 $re = Regex::Newbie->new
500 ->start
501 ->match("foo")
502 ->repeat(Regex::Newbie->class("char"),3)
503 ->end;
504 /$re/;
e50bb9a1 505
722d2a37 506=head2 GUI::Native
e50bb9a1 507
508A non-core module that would use "native" GUI to create graphical
e50bb9a1 510
722d2a37 511=head2 foreach(reverse ...)
e50bb9a1 512
722d2a37 513Currently
e50bb9a1 514
722d2a37 515 foreach (reverse @_) { ... }
e50bb9a1 516
517puts C<@_> on the stack, reverses it putting the reversed version on the
518stack, then iterates forwards. Instead, it could be special-cased to put
519C<@_> on the stack then iterate backwards.
e50bb9a1 520
722d2a37 521=head2 Constant function cache
e50bb9a1 522
722d2a37 523=head2 Approximate regular expression matching
e50bb9a1 524
722d2a37 525=head1 Ongoing
e50bb9a1 526
722d2a37 527These items B<always> need doing:
e50bb9a1 528
722d2a37 529=head2 Update guts documentation
e50bb9a1 530
531Simon Cozens tries to do this when possible, and contributions to the
532C<perlapi> documentation is welcome.
e50bb9a1 533
722d2a37 534=head2 Add more tests
e50bb9a1 535
536Michael Schwern will donate $500 to Yet Another Society when all core
537modules have tests.
e50bb9a1 538
722d2a37 539=head2 Update auxiliary tools
e50bb9a1 540
722d2a37 541The code we ship with Perl should look like good Perl 5.
e50bb9a1 542
722d2a37 543=head1 Recently done things
e50bb9a1 544
545These are things which have been on the todo lists in previous releases
546but have recently been completed.
e50bb9a1 547
722d2a37 548=head2 Safe signal handling
e50bb9a1 549
550A new signal model went into 5.7.1 without much fanfare. Operations and
551C<malloc>s are no longer interrupted by signals, which are handled
552between opcodes. This means that C<PERL_ASYNC_CHECK> now actually does
553something. However, there are still a few things that need to be done.
e50bb9a1 554
722d2a37 555=head2 Tie Modules
e50bb9a1 556
557Modules which implement arrays in terms of strings, substrings or files
558can be found on the CPAN.
e50bb9a1 559
722d2a37 560=head2 gettimeofday
e50bb9a1 561
722d2a37 562C<Time::Hires> has been integrated into the core.
e50bb9a1 563
722d2a37 564=head2 setitimer and getimiter
e50bb9a1 565
722d2a37 566Adding C<Time::Hires> got us this too.
e50bb9a1 567
568=head2 Testing __DIE__ hook
570Tests have been added.
572=head2 CPP equivalent in Perl
e50bb9a1 573
574A C Yardley will probably have done this by the time you can read this.
575This allows for a generalization of the C constant detection used in
576building C<>.
e50bb9a1 577
722d2a37 578=head2 Explicit switch statements
e50bb9a1 579
580C<> has been integrated into the core to give you all manner of
581C<> semantics.
e50bb9a1 582
722d2a37 583=head2 autocroak
e50bb9a1 584
722d2a37 585This is C<>.
e50bb9a1 586
722d2a37 587=head2 UTF/EBCDIC
e50bb9a1 588
722d2a37 589Nick Ing-Simmons has made UTF-EBCDIC (UTR13) work with Perl.
e50bb9a1 590
722d2a37 591 EBCDIC?
e50bb9a1 592
722d2a37 593=head2 UTF Regexes
e50bb9a1 594
595Although there are probably some small bugs to be rooted out, Jarkko
596Hietaniemi has made regular expressions polymorphic between bytes and
e50bb9a1 598
722d2a37 599=head2 perlcc to produce executable
e50bb9a1 600
601C<perlcc> was recently rewritten, and can now produce standalone
e50bb9a1 603
722d2a37 604=head2 END blocks saved in compiled output
e50bb9a1 605
722d2a37 606=head2 Secure temporary file module
e50bb9a1 607
722d2a37 608Tim Jenness' C<File::Temp> is now in core.
e50bb9a1 609
722d2a37 610=head2 Integrate Time::HiRes
e50bb9a1 611
722d2a37 612This module is now part of core.
e50bb9a1 613
722d2a37 614=head2 Turn Cwd into XS
e50bb9a1 615
722d2a37 616Benjamin Sugars has done this.
e50bb9a1 617
722d2a37 618=head2 Mmap for input
e50bb9a1 619
722d2a37 620Nick Ing-Simmons' C<perlio> supports an C<mmap> IO method.
e50bb9a1 621
722d2a37 622=head2 Byte to/from UTF8 and UTF8 to/from local conversion
e50bb9a1 623
722d2a37 624C<Encode> provides this.
e50bb9a1 625
722d2a37 626=head2 Add sockatmark support
e50bb9a1 627
722d2a37 628Added in 5.7.1
e50bb9a1 629
630=head2 Mailing list archives
634=head2 Bug tracking
636Richard Foley has written the bug tracking system at
e50bb9a1 637
722d2a37 638=head2 Integrate MacPerl
e50bb9a1 639
640Chris Nandor and Matthias Neeracher have integrated the MacPerl changes
641into 5.6.0.
e50bb9a1 642
722d2a37 643=head2 Web "nerve center" for Perl
e50bb9a1 644
722d2a37 645 is what you're looking for.
e50bb9a1 646
722d2a37 647=head2 Regular expression tutorial
e50bb9a1 648
722d2a37 649C<perlretut>, provided by Mark Kvale.
e50bb9a1 650
722d2a37 651=head2 Debugging Tutorial
e50bb9a1 652
722d2a37 653C<perldebtut>, written by Richard Foley.
e50bb9a1 654
722d2a37 655=head2 Integrate new modules
e50bb9a1 656
722d2a37 657Jarkko has been integrating madly into 5.7.x
e50bb9a1 658
722d2a37 659=head2 Integrate profiler
e50bb9a1 660
722d2a37 661C<Devel::DProf> is now a core module.
e50bb9a1 662
722d2a37 663=head2 Y2K error detection
e50bb9a1 664
665There's a configure option to detect unsafe concatenation with "19", and
666a CPAN module. (C<D'oh::Year>)
e50bb9a1 667
722d2a37 668=head2 Regular expression debugger
e50bb9a1 669
670While not part of core, Mark-Jason Dominus has written C<Rx> and has
671also come up with a generalised strategy for regular expression
e50bb9a1 673
722d2a37 674=head2 POD checker
e50bb9a1 675
722d2a37 676That's, uh, F<podchecker>
e50bb9a1 677
722d2a37 678=head2 "Dynamic" lexicals
e50bb9a1 679
722d2a37 680=head2 Cache precompiled modules
e50bb9a1 681
722d2a37 682=head1 Deprecated Wishes
e50bb9a1 683
684These are items which used to be in the todo file, but have been
685deprecated for some reason.
e50bb9a1 686
722d2a37 687=head2 Loop control on do{}
e50bb9a1 688
722d2a37 689This would break old code; use C<do{{ }}> instead.
e50bb9a1 690
722d2a37 691=head2 Lexically scoped typeglobs
e50bb9a1 692
722d2a37 693Not needed now we have lexical IO handles.
e50bb9a1 694
722d2a37 695=head2 format BOTTOM
3958b146 696
722d2a37 697=head2 report HANDLE
e50bb9a1 698
722d2a37 699Damian Conway's text formatting modules seem to be the Way To Go.
e50bb9a1 700
722d2a37 701=head2 Generalised want()/caller())
3958b146 702
722d2a37 703=head2 Named prototypes
e50bb9a1 704
722d2a37 705These both seem to be delayed until Perl 6.
e50bb9a1 706
722d2a37 707=head2 Built-in globbing
e50bb9a1 708
722d2a37 709The C<File::Glob> module has been used to replace the C<glob> function.
e50bb9a1 710
722d2a37 711=head2 Regression tests for suidperl
e50bb9a1 712
722d2a37 713C<suidperl> is deprecated in favour of common sense.
e50bb9a1 714
722d2a37 715=head2 Cached hash values
e50bb9a1 716
722d2a37 717We have shared hash keys, which perform the same job.
e50bb9a1 718
722d2a37 719=head2 Add compression modules
e50bb9a1 720
721The compression modules are a little heavy; meanwhile, Nick Clark is
722working on experimental pragmata to do transparent decompression on
e50bb9a1 724
722d2a37 725=head2 Reorganise documentation into tutorials/references
e50bb9a1 726
722d2a37 727Could not get consensus on P5P about this.
e50bb9a1 728
729=head2 Remove distinction between functions and operators
731Caution: highly flammable.
733=head2 Make XS easier to use
e50bb9a1 734
722d2a37 735Use C<Inline> instead, or SWIG.
e50bb9a1 736
722d2a37 737=head2 Make embedding easier to use
e50bb9a1 738
722d2a37 739Use C<Inline::CPR>.
e50bb9a1 740
722d2a37 741=head2 man for perl
04c70446 742
722d2a37 743See the Perl Power Tools. (
04c70446 744
722d2a37 745=head2 my $Package::variable
04c70446 746
722d2a37 747Use C<our> instead.
04c70446 748
722d2a37 749=head2 "or" tests defined, not truth
04c70446 750
722d2a37 751Suggesting this on P5P B<will> cause a boring and interminable flamewar.
04c70446 752
722d2a37 753=head2 "class"-based lexicals
04c70446 754
cbb3fa72 755Use flyweight objects, secure hashes or, dare I say it, pseudo-hashes instead.
04c70446 756
722d2a37 757=head2 byteperl
04c70446 758
722d2a37 759C<ByteLoader> covers this.
04c70446 760
722d2a37 761=head2 Lazy evaluation / tail recursion removal
04c70446 762
763C<List::Util> in core gives some of these; tail recursion removal is
764done manually, with C<goto &whoami;>. (However, MJD has found that
765C<goto &whoami> introduces a performance penalty, so maybe there should
766be a way to do this after all: C<sub foo {START: ... goto START;> is