warn is a macro, avoid using at a variable to avoid warnings

[perl5.git] / Todo-5.6

diff --git a/Todo-5.6 b/Todo-5.6
index e06add9..30c7cc0 100644 (file)
--- a/Todo-5.6
+++ b/Todo-5.6
@@ -1,10 +1,32 @@
+Unicode support
+    finish byte <-> utf8 and localencoding <-> utf8 conversions
+    make substr($bytestr,0,0,$charstr) do the right conversion
+    add Unicode::Map equivivalent to core
+    add support for I/O disciplines
+        - a way to specify disciplines when opening things:
+           open(F, "<:crlf :utf16", $file)
+        - a way to specify disciplines for an already opened handle:
+           binmode(STDIN, ":slurp :raw")
+       - a way to set default disciplines for all handle constructors:
+           use open IN => ":any", OUT => ":utf8", SYS => ":utf16"
+    eliminate need for "use utf8;"
+    autoload byte.pm when byte:: is seen by the parser
+    check uv_to_utf8() calls for buffer overflow
+    make \uXXXX (and \u{XXXX}?) where XXXX are hex digits
+       to work similarly to Unicode tech reports and Java
+       notation \uXXXX (and already existing \x{XXXX))?
+       more than four hexdigits? make also \U+XXXX work?
+    See also "Locales", "Regexen", and "Miscellaneous".
+

 Multi-threading
 Multi-threading

-    $AUTOLOAD. Hmm.
-    consistent semantics for exit/die in threads
-    SvREFCNT_dec(curstack) in threadstart() in Thread.xs
-    better support for externally created threads
-    Thread::Pool
-    spot-check globals like statcache and global GVs for thread-safety
+    support "use Thread;" under useithreads
+    add mechanism to:
+      - create new interpreter in a different thread
+      - exchange data between interpreters/threads
+      - share namespaces between interpreters/threads
+    work out consistent semantics for exit/die in threads
+    support for externally created threads?
+    Thread::Pool?

 
 Compiler
     auto-produce executable
 
 Compiler
     auto-produce executable


@@ -16,49 +38,124 @@ Compiler
        from where newASSIGNOP steals the field)
 
 Namespace cleanup
        from where newASSIGNOP steals the field)
 
 Namespace cleanup

-    CPP-space:   restrict what we export from headers
-    header-space: move into CORE/perl/
-    API-space:    begin list of things that constitute public api
-
-MULTIPLICITY support
-    complete work on safe recursive interpreters, C<Perl->new()>
-    revisit extra implicit arg that provides curthread/curinterp context
+    CPP-space:   restrict what we export from headers when !PERL_CORE
+    header-space: move into CORE/perl/?
+    API-space:    complete the list of things that constitute public api

 
 Configure
     make configuring+building away from source directory work (VPATH et al)
 
 Configure
     make configuring+building away from source directory work (VPATH et al)

-    _r support
-    cross-compilation configuring
-    POSIX 1003.1 1996 Edition support
+       this is related to: cross-compilation configuring (see Todo)
+    _r support (see Todo for mode detailed description)
+    POSIX 1003.1 1996 Edition support--realtime stuff:
+       POSIX semaphores, message queues, shared memory, realtime clocks,
+       timers, signals (the metaconfig units mostly already exist for these)
+       PREFERABLY AS AN EXTENSION
+    UNIX98 support: reader-writer locks, realtime/asynchronous IO
+       PREFERABLY AS AN EXTENSION
+    IPv6 support: see RFC2292, RFC2553
+       PREFERABLY AS AN EXTENSION
+       there already is Socket6 in CPAN
+
+Long doubles
+    figure out where the PV->NV->PV conversion gets it wrong at least
+    in AIX and Tru64 (V5.0 and onwards) when using long doubles: see the
+    regexp tricks we had to insert to t/comp/use.t and t/lib/bigfltpm.t,
+     (?:9|8999\d+) and the like.
+
+64-bit support
+    Configure probe for quad_t, uquad_t, and (argh) u_quad_t, they might
+    be in some systems the only thing working as quadtype and uquadtype.
+    more pain: long_long, u_long_long. 

 
 Locales
 
 Locales

-    locales across packages?
+    deprecate traditional/legacy locales?
+    How do locales work across packages?
+    figure out how to support Unicode locales
+       suggestion: integrate the IBM Classes for Unicode (ICU)
+       http://oss.software.ibm.com/developerworks/opensource/icu/project/
+               ICU is "portable, open-source Unicode library with:
+               charset-independent locales (with multiple locales
+               simultaneously supported in same thread; character
+               conversions; formatting/parsing for numbers, currencies,
+               date/time and messages; message catalogs (resources);
+               transliteration, collation, normalization, and text
+               boundaries (grapheme, word, line-break))".
+       Check out also the Locale Converter:
+       http://alphaworks.ibm.com/tech/localeconverter
+    There is also the iconv interface, either from XPG4 or GNU (glibc).
+    iconv is about character set conversions.
+    Either ICU or iconv would be valuable to get integrated
+    into Perl, Configure already probes for libiconv and <iconv.h>. 

 
 Regexen
 
 Regexen

+   make RE engine thread-safe
+   a way to do full character set arithmetics: now one can do
+       addition, negate a whole class, and negate certain subclasses
+       (e.g. \D, [:^digit:]), but a more generic way to add/subtract/
+       intersect characters/classes, like described in the Unicode technical
+       report on Regular Expression Guidelines,
+       http://www.unicode.org/unicode/reports/tr18/
+       (amusingly, the TR notes that difference and intersection
+        can be done using "Perl-style look-ahead")
+       difference syntax?  maybe [[:alpha:][^abc]] meaning
+       "all alphabetic expect a, b, and c"? or [[:alpha:]-[abc]]?
+       (maybe bad, as we explicitly disallow such 'ranges')
+       intersection syntax? maybe [[..]&[...]]?

    POSIX [=bar=] and [.zap.] would nice too but there's no API for them
    POSIX [=bar=] and [.zap.] would nice too but there's no API for them

-   (=bar= could be done with Unicode, though)
+       =bar= could be done with Unicode, though, see the Unicode TR #15 about
+       normalization forms:
+       http://www.unicode.org/unicode/reports/tr15/
+       this is also a part of the Unicode 3.0:
+       http://www.unicode.org/unicode/uni2book/u2.html
+       executive summary: there are several different levels of 'equivalence'
+   trie optimization: factor out common suffixes (and prefixes?)
+       from |-alternating groups (both for exact strings and character
+       classes, use lookaheads?)

    approximate matching
 
    approximate matching
 

+Security
+    use fchown, fchmod (and futimes?) internally when possible
+    use fchdir(how portable?)
+    create secure reliable portable temporary file modules
+    audit the standard utilities for security problems and fix them
+

 Reliable Signals
     custom opcodes
     alternate runops() for signal despatch
     figure out how to die() in delayed sighandler
 Reliable Signals
     custom opcodes
     alternate runops() for signal despatch
     figure out how to die() in delayed sighandler

-    add tests for Thread::Signal
+    make Thread::Signal work under useithreads

 
 Win32 stuff
 
 Win32 stuff

-    get PERL_OBJECT building under gcc
-    get PERL_OBJECT building on non-win32
-    automate generation of 'protected' prototypes for CPerlObj 
-    rename new headers to be consistent with the rest
-    sort out the spawnvp() mess
+    sort out the spawnvp() mess for system('a','b','c') compatibility

     work out DLL versioning
     work out DLL versioning

-    style-check

 
 Miscellaneous
 
 Miscellaneous

-    rename and alter ISA.pm
-    magic_setisa should be made to update %FIELDS [???]
+    introduce @( and @) because group names can have spaces

     add new modules (Archive::Tar, Compress::Zlib, CPAN::FTP?)
     add new modules (Archive::Tar, Compress::Zlib, CPAN::FTP?)

-    fix pod2html to generate relative URLs (replace with new PodtoHtml?)
+    sub-second sleep()? alarm()? time()? (integrate Time::HiRes?
+       Configure doesn't yet probe for usleep/nanosleep/ualarm but
+       the units exist)
+    floating point handling: nans, infinities, fp exception masks, etc.
+       At least the following interfaces exist: fp_classify(), fp_class(),
+       class(), isinf(), isfinite(), finite(), isnormal(), unordered(),
+       <ieeefp.h>, <fp_class.h> (there are metaconfig units for all these),
+       fp_setmask(), fp_getmask(), fp_setround(), fp_getround()
+       (no metaconfig units yet for these).
+        Don't forget finitel(), fp_classl(), fp_class_l(), (yes, both do,
+       unfortunately, exist), and unorderedl().
+       PREFERABLY AS AN EXTENSION.
+       As of 5.6.1 there is cpp macro Perl_isnan().
+    fix the basic arithmetics (+ - * / %) to preserve IVness/UVness if
+       both arguments are IVs/UVs: it sucks that one cannot see
+       the 'carry flag' (or equivalent) of the CPU from C,
+       C is too high-level...
+    replace pod2html with new PodtoHtml? (requires other modules from CPAN)

     automate testing with large parts of CPAN
     automate testing with large parts of CPAN

+    Unicode collation? http://www.unicode.org/unicode/reports/tr10/
+    turn Cwd into an XS module?  (Configure already probes for getcwd())
+    mmap for speeding up input? (Configure already probes for the mmap family)
+    sendmsg, recvmsg? (Configure doesn't probe for these but the units exist)
+    setitimer, getitimer? (the metaconfig units exist)

 
 Ongoing
     keep filenames 8.3 friendly, where feasible
 
 Ongoing
     keep filenames 8.3 friendly, where feasible


@@ -68,7 +165,10 @@ Ongoing
 Documentation
     describe new age patterns
     update perl{guts,call,embed,xs} with additions, changes to API
 Documentation
     describe new age patterns
     update perl{guts,call,embed,xs} with additions, changes to API

+    convert more examples to use autovivified filehandles

     document Win32 choices
     spot-check all new modules for completeness
     better docs for pack()/unpack()
     reorg tutorials vs. reference sections
     document Win32 choices
     spot-check all new modules for completeness
     better docs for pack()/unpack()
     reorg tutorials vs. reference sections

+    make roffitall to be dynamical about its pods and libs
+