Commit | Line | Data |
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54aff467 GS |
1 | Always check out the latest perl5-porters discussions on these subjects |
2 | before embarking on an implementation tour. | |
ed3f4a32 | 3 | |
8990e307 LW |
4 | Tie Modules |
5 | VecArray Implement array using vec() | |
6 | SubstrArray Implement array using substr() | |
7 | VirtualArray Implement array using a file | |
8 | ShiftSplice Defines shift et al in terms of splice method | |
93a17b20 | 9 | |
8990e307 | 10 | Would be nice to have |
ed3f4a32 | 11 | pack "(stuff)*", "(stuff)4", ... |
54aff467 | 12 | contiguous bitfields in pack/unpack |
463ee0b2 | 13 | lexperl |
54aff467 GS |
14 | bundled perl preprocessor |
15 | use posix calls internally where possible | |
9cc29783 | 16 | gettimeofday (possibly best left for a module?) |
8990e307 | 17 | format BOTTOM |
2304df62 | 18 | -i rename file only when successfully changed |
54aff467 | 19 | all ARGV input should act like <> |
2304df62 | 20 | report HANDLE [formats]. |
a0d0e21e | 21 | support in perlmain to rerun debugger |
aa00cc68 | 22 | regression tests using __DIE__ hook |
aa00cc68 TB |
23 | lexically scoped functions: my sub foo { ... } |
24 | lvalue functions | |
54aff467 GS |
25 | wantlvalue? more generalized want()/caller()? |
26 | named prototypes: sub foo ($foo, @bar) { ... } ? | |
7b8d334a | 27 | regression/sanity tests for suidperl |
ed3f4a32 JH |
28 | iterators/lazy evaluation/continuations/first/ |
29 | first_defined/short-circuiting grep/?? | |
30 | This is a very thorny and hotly debated subject, | |
54aff467 GS |
31 | tread carefully and do your homework first |
32 | full 64 bit support (i.e. "long long"). Things to consider: | |
2607c2e4 JH |
33 | how to store/retrieve 32+ integers into/from Perl scalars? |
34 | 32+ constants in Perl code? (non-portable!) | |
35 | 32+ arguments/return values to/from system calls? (seek et al) | |
36 | 32+ bit ops (&|^~, currently explicitly disabled) | |
54aff467 | 37 | generalise Errno way of extracting cpp symbols and use that in |
24e11b2a | 38 | Errno and Fcntl (ExtUtils::CppSymbol?) |
54aff467 | 39 | the _r-problem: for all the {set,get,end}*() system database |
2607c2e4 JH |
40 | calls (and a couple more: readdir, *rand*, crypt, *time, |
41 | tmpnam) there are in many systems the _r versions | |
54aff467 | 42 | to be used in re-entrant (=multithreaded) code |
24e11b2a | 43 | Icky things: the _r API is not standardized and |
54aff467 GS |
44 | the _r-forms require per-thread data to store their state |
45 | memory profiler: turn malloc.c:Perl_dump_mstats() into | |
24e11b2a JH |
46 | an extension (Devel::MProf?) that would return the malloc |
47 | stats in a nice Perl datastructure (also a simple interface | |
54aff467 | 48 | to return just the grand total would be good) |
11eeea96 JH |
49 | Unicode: [=bar=], combining characters equivalence |
50 | (U+4001 + U+0308 should be equal to U+00C4, in other words | |
51 | A+diaereres should equal Ä), Unicode collation | |
8990e307 | 52 | |
a0d0e21e | 53 | Possible pragmas |
85e6fe83 | 54 | debugger |
54aff467 | 55 | optimize (use less qw[memory cpu]) |
463ee0b2 LW |
56 | |
57 | Optimizations | |
a0d0e21e LW |
58 | constant function cache |
59 | switch structures | |
a0d0e21e | 60 | foreach(reverse...) |
54aff467 GS |
61 | optimize away constant split at compile time (a la qw[f o o]) |
62 | cache eval tree (unless lexical outer scope used (mark in &compiling?)) | |
463ee0b2 | 63 | rcatmaybe |
54aff467 GS |
64 | shrink opcode tables via multiple implementations selected in peep |
65 | cache hash value? (Not a win, according to Guido) | |
66 | optimize away @_ where possible | |
8990e307 | 67 | "one pass" global destruction |
54aff467 | 68 | rewrite regexp parser for better integrated optimization |
aa00cc68 | 69 | LRU cache of regexp: foreach $pat (@pats) { foo() if /$pat/ } |
463ee0b2 | 70 | |
a0d0e21e | 71 | Vague possibilities |
54aff467 | 72 | ref function in list context? |
463ee0b2 | 73 | make tr/// return histogram in list context? |
54aff467 GS |
74 | loop control on do{} et al |
75 | explicit switch statements | |
463ee0b2 LW |
76 | built-in globbing |
77 | compile to real threaded code | |
78 | structured types | |
85e6fe83 | 79 | autocroak? |
54aff467 | 80 | modifiable $1 et al |