applied non-conflicting parts of suggested patch

[perl5.git] / Todo

diff --git a/Todo b/Todo
index 495be2e..ca5cbaf 100644 (file)
--- a/Todo
+++ b/Todo
@@ -1,37 +1,56 @@
-* Fixes
+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
 
-CC backend: goto, sort with non-default comparison. last for non-loop blocks.
-Version checking
-improve XSUB handling (both static and dynamic)
-sv_magic can do SvREFCNT_inc(obj) which messes up precalculated refcounts
-allocation of XPV[INAHC]V structures needs fixing: Perl tries to free
-them whereas the compiler expects them to be linked to a xpv[inahc]v_root
-list the same as X[IPR]V structures.
-ref counts
-perl_parse replacement
-fix cstring for long strings
-compile-time initialisation of AvARRAYs
-signed/unsigned problems with NV (and IV?) initialisation and elsewhere?
-CvOUTSIDE for ordinary subs
-DATA filehandle for standalone Bytecode program (easy)
-DATA filehandle for multiple bytecode-compiled modules (harder)
-DATA filehandle for C-compiled program (yet harder)
+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")
+       Generalise Errno way of extracting cpp symbols and use that in
+           Errno and Fcntl (ExtUtils::CppSymbol?)
 
-* Features
+Possible pragmas
+       debugger
+       optimize (use less memory, CPU)
 
-type checking
-compile time v. runtime initialisation
-save PMOPs in compiled form
-selection of what to dump
-options for cutting out line info etc.
-comment output
-shared constants
-module dependencies
+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
 
-* Optimisations
-collapse LISTOPs to UNOPs or BASEOPs
-compile-time qw(), constant subs
-global analysis of variables, type hints etc.
-demand-loaded bytecode (leader of each basic block replaced by an op
-which loads in bytecode for its block)
-fast sub calls for CC backend