Even more Todo.

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

diff --git a/Todo b/Todo
old mode 100755 (executable)
new mode 100644 (file)
index 86e2b17..2602d4c
--- a/Todo
+++ b/Todo
@@ -1,18 +1,70 @@
-Set KEEP on constant split
-Optimize foreach on array.
-Execute all BEGINs and ENDs.
-Make a good way to determine if *.pl is being executed directly.
-Make specialized allocators.
-Optimize switches.
-Do debugger
-Cache eval tree
-Implement eval once
-Cache m//g state
-rcatmaybe
-Fix length($&)
-eval {} coredump
+Tie Modules
+       VecArray                Implement array using vec()
+       SubstrArray             Implement array using substr()
+       VirtualArray            Implement array using a file
+       ShiftSplice             Defines shift et al in terms of splice method
+
+Would be nice to have
+       pack "(stuff)*"
+       Contiguous bitfields in pack/unpack
+       lexperl
+       Bundled perl preprocessor
+       Use posix calls internally where possible
+       gettimeofday (possibly best left for a module?)
+       format BOTTOM
+       -i rename file only when successfully changed
+       All ARGV input should act like <>
+       report HANDLE [formats].
+       support in perlmain to rerun debugger
+       regression tests using __DIE__ hook
+       reference to compiled regexp
+       lexically scoped functions: my sub foo { ... }
+       lvalue functions
+       regression/sanity tests for suidperl
+       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
+       optimize (use less memory, CPU)
+
+Optimizations
+       constant function cache
+       switch structures
+       foreach(reverse...)
+       Set KEEP on constant split
+       Cache eval tree (unless lexical outer scope used (mark in &compiling?))
+       rcatmaybe
+       Shrink opcode tables via multiple implementations selected in peep
+       Cache hash value?  (Not a win, according to Guido)
+       Optimize away @_ where possible
+       "one pass" global destruction
+       Rewrite regexp parser for better integrated optimization
+       LRU cache of regexp: foreach $pat (@pats) { foo() if /$pat/ }
+
+Vague possibilities
+       ref function in list context
+       make tr/// return histogram in list context?
+       Loop control on do{} et al
+       Explicit switch statements
+       built-in globbing
+       compile to real threaded code
+       structured types
+       autocroak?
+       Modifiable $1 et al
 
-make tr/// return histogram in list context?
-Do anything with "hint"?
-When does split() go to @_?
-undef wantarray in void context?