Fix a typo in #3725.

[p5sagit/p5-mst-13.2.git] / Todo

diff --git a/Todo b/Todo
index a4cecbf..b8d9012 100644 (file)
--- a/Todo
+++ b/Todo
@@ -1,3 +1,6 @@
+Check out always the latest perl5-porters discussions on these subjects
+before embaring on an implementation tour.
+
 Tie Modules
        VecArray                Implement array using vec()
        SubstrArray             Implement array using substr()
@@ -5,14 +8,13 @@ Tie Modules
        ShiftSplice             Defines shift et al in terms of splice method
 
 Would be nice to have
-       pack "(stuff)*"
+       pack "(stuff)*", "(stuff)4", ...
        Contiguous bitfields in pack/unpack
        lexperl
        Bundled perl preprocessor
        Use posix calls internally where possible
-       gettimeofday
+       gettimeofday (possibly best left for a module?)
        format BOTTOM
-       -iprefix.
        -i rename file only when successfully changed
        All ARGV input should act like <>
        report HANDLE [formats].
@@ -21,9 +23,30 @@ Would be nice to have
        reference to compiled regexp
        lexically scoped functions: my sub foo { ... }
        lvalue functions
+           wantlvalue?  more generalized want()?
+       named prototypes: sub ($foo, @bar) foo { ... }
        regression/sanity tests for suidperl
-       Full 64 bit support (i.e. "long long")
-       Generalise Errno way of extracting cpp symbols and use that in Errno and Fcntl (ExtUtils::CppSymbol?)
+       iterators/lazy evaluation/continuations/first/
+           first_defined/short-circuiting grep/??
+           This is a very thorny and hotly debated subject,
+           tread carefully and do your homework first.
+       Full 64 bit support (i.e. "long long").  Things to consider:
+           how to store/retrieve 32+ integers into/from Perl scalars?
+           32+ constants in Perl code? (non-portable!)
+           32+ arguments/return values to/from system calls? (seek et al)
+           32+ bit ops (&|^~, currently explicitly disabled)
+       Generalise Errno way of extracting cpp symbols and use that in
+           Errno and Fcntl (ExtUtils::CppSymbol?)
+       The _r-problem: for all the {set,get,end}*() system database
+            calls (and a couple more: readdir, *rand*, crypt, *time,
+            tmpnam) there are in many systems the _r versions
+            to be used in re-entrant (=multithreaded) code.
+            Icky things: the _r API is not standardized and
+            the _r-forms require per-thread data to store their state.
+       Memory profiler: turn malloc.c:Perl_dump_mstats() into
+           an extension (Devel::MProf?) that would return the malloc
+           stats in a nice Perl datastructure (also a simple interface
+           to return just the grand total would be good).
 
 Possible pragmas
        debugger
@@ -32,7 +55,6 @@ Possible pragmas
 Optimizations
        constant function cache
        switch structures
-       eval qw() at compile time
        foreach(reverse...)
        Set KEEP on constant split
        Cache eval tree (unless lexical outer scope used (mark in &compiling?))
@@ -41,7 +63,6 @@ Optimizations
        Cache hash value?  (Not a win, according to Guido)
        Optimize away @_ where possible
        "one pass" global destruction
-       Optimize sort by { $a <=> $b }
        Rewrite regexp parser for better integrated optimization
        LRU cache of regexp: foreach $pat (@pats) { foo() if /$pat/ }