- append a "..." to the produced string if the maximum length is exceeded
- really fancy: print unicode characters as \N{...}
+NOTE: pv_display(), pv_uni_display(), sv_uni_display() are doing
+something like the above.
+
=head2 Overloadable regex assertions
This may or may not be possible with the current regular expression
algorithmically computed if you're dealing with Thai text. Hence, the
B<\b> assertion wants to be overloaded by a function.
-=head2 Unicode case mappings
+=head2 Unicode
+
+=over 4
+
+=item *
+
+Allow for long form of the General Category Properties, e.g
+C<\p{IsOpenPunctuation}>, not just the abbreviated form, e.g.
+C<\p{IsPs}>.
+
+=item *
+
+Allow for the metaproperties: C<XID Start>, C<XID Continue>,
+C<NF*_NO>, C<NF*_MAYBE> (require the DerivedCoreProperties and
+DerviceNormalizationProperties files).
+
+There are also multiple value properties still unimplemented:
+C<Numeric Type>, C<East Asian Width>.
+
+=item *
Case Mappings? http://www.unicode.org/unicode/reports/tr21/
-=head2 Unicode regular expression character classes
+lc(), uc(), lcfirst(), and ucfirst() work only for some of the
+simplest cases, where the mapping goes from a single Unicode character
+to another single Unicode character. See lib/unicore/SpecCase.txt
+(and CaseFold.txt).
+
+=item *
They have some tricks Perl doesn't yet implement like character
class subtraction.
http://www.unicode.org/unicode/reports/tr18/
+=back
+
+See L<perlunicode/UNICODE REGULAR EXPRESSION SUPPORT LEVEL> for what's
+there and what's missing. Almost all of Levels 2 and 3 is missing,
+and as of 5.8.0 not even all of Level 1 is there.
+
=head2 use Thread for iThreads
Artur Bergman's C<iThreads> module is a start on this, but needs to
overhead of an XSUB; the user should be able to create PP code. Simon
Cozens has some ideas on this.
-=head2 spawnvp() on Win32
-
-Win32 has problems spawning processes, particularly when the arguments
-to the child process contain spaces, quotes or tab characters.
-
=head2 DLL Versioning
Windows needs a way to know what version of a XS or C<libperl> DLL it's
=head2 Cross compilation
Make Perl buildable with a cross-compiler. This will play havoc with
-Configure, which needs to how how the target system will respond to
+Configure, which needs to know how the target system will respond to
its tests; maybe C<microperl> will be a good starting point here.
(Indeed, Bart Schuller reports that he compiled up C<microperl> for
the Agenda PDA and it works fine.) A really big spanner in the works
=head2 All ARGV input should act like E<lt>E<gt>
+eg C<read(ARGV, ...)> doesn't currently read across multiple files.
+
=head2 Support for rerunning debugger
There should be a way of restarting the debugger on demand.
This has been done in places, but needs a thorough code review.
Also fchdir is available in some platforms.
+=head2 Make v-strings overloaded objects
+
+Instead of having to guess whether a string is a v-string and thus
+needs to be displayed with %vd, make v-strings (readonly) objects
+(class "vstring"?) with a stringify overload.
+
=head1 Vague ideas
Ideas which have been discussed, and which may or may not happen.
Collation? http://www.unicode.org/unicode/reports/tr10/
Normalization? http://www.unicode.org/unicode/reports/tr15/
+=head2 Create debugging macros
+
+Debugging macros (like printsv, dump) can make debugging perl inside a
+C debugger much easier. A good set for gdb comes with mod_perl.
+Something similar should be distributed with perl.
+
+The proper way to do this is to use and extend Devel::DebugInit.
+Devel::DebugInit also needs to be extended to support threads.
+
+See p5p archives for late May/early June 2001 for a recent discussion
+on this topic.
+
=cut
projects / p5sagit/p5-mst-13.2.git / blobdiff