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1 | Check out always the latest perl5-porters discussions on these subjects |
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2 | before embarking on an implementation tour. |
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3 | |
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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 |
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9 | |
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10 | Would be nice to have |
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11 | pack "(stuff)*", "(stuff)4", ... |
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12 | Contiguous bitfields in pack/unpack |
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13 | lexperl |
14 | Bundled perl preprocessor |
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15 | Use posix calls internally where possible |
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16 | gettimeofday (possibly best left for a module?) |
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17 | format BOTTOM |
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18 | -i rename file only when successfully changed |
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19 | All ARGV input should act like <> |
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20 | report HANDLE [formats]. |
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21 | support in perlmain to rerun debugger |
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22 | regression tests using __DIE__ hook |
23 | reference to compiled regexp |
24 | lexically scoped functions: my sub foo { ... } |
25 | lvalue functions |
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26 | wantlvalue? more generalized want()? |
27 | named prototypes: sub ($foo, @bar) foo { ... } |
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28 | regression/sanity tests for suidperl |
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29 | iterators/lazy evaluation/continuations/first/ |
30 | first_defined/short-circuiting grep/?? |
31 | This is a very thorny and hotly debated subject, |
32 | tread carefully and do your homework first. |
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33 | Full 64 bit support (i.e. "long long"). Things to consider: |
34 | how to store/retrieve 32+ integers into/from Perl scalars? |
35 | 32+ constants in Perl code? (non-portable!) |
36 | 32+ arguments/return values to/from system calls? (seek et al) |
37 | 32+ bit ops (&|^~, currently explicitly disabled) |
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38 | Generalise Errno way of extracting cpp symbols and use that in |
39 | Errno and Fcntl (ExtUtils::CppSymbol?) |
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40 | The _r-problem: for all the {set,get,end}*() system database |
41 | calls (and a couple more: readdir, *rand*, crypt, *time, |
42 | tmpnam) there are in many systems the _r versions |
43 | to be used in re-entrant (=multithreaded) code. |
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44 | Icky things: the _r API is not standardized and |
45 | the _r-forms require per-thread data to store their state. |
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46 | Memory profiler: turn malloc.c:Perl_dump_mstats() into |
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47 | an extension (Devel::MProf?) that would return the malloc |
48 | stats in a nice Perl datastructure (also a simple interface |
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49 | to return just the grand total would be good). |
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50 | Unicode: [=bar=], combining characters equivalence |
51 | (U+4001 + U+0308 should be equal to U+00C4, in other words |
52 | A+diaereres should equal Ä), Unicode collation |
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53 | |
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54 | Possible pragmas |
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55 | debugger |
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56 | optimize (use less memory, CPU) |
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57 | |
58 | Optimizations |
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59 | constant function cache |
60 | switch structures |
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61 | foreach(reverse...) |
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62 | Set KEEP on constant split |
63 | Cache eval tree (unless lexical outer scope used (mark in &compiling?)) |
64 | rcatmaybe |
65 | Shrink opcode tables via multiple implementations selected in peep |
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66 | Cache hash value? (Not a win, according to Guido) |
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67 | Optimize away @_ where possible |
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68 | "one pass" global destruction |
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69 | Rewrite regexp parser for better integrated optimization |
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70 | LRU cache of regexp: foreach $pat (@pats) { foo() if /$pat/ } |
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71 | |
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72 | Vague possibilities |
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73 | ref function in list context |
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74 | make tr/// return histogram in list context? |
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75 | Loop control on do{} et al |
76 | Explicit switch statements |
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77 | built-in globbing |
78 | compile to real threaded code |
79 | structured types |
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80 | autocroak? |
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81 | Modifiable $1 et al |
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82 | |