X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=pod%2Fperltodo.pod;h=3c7243254ef7ba6086af40e281287cb6cb85f247;hb=a2efc82216efc10377cf26fd4aff1aa5e66c6687;hp=5d280e693695366863ceaff2e1431b92d2a75d54;hpb=0562c0e3630958db13a0e70db1b90c05d3fee158;p=p5sagit%2Fp5-mst-13.2.git diff --git a/pod/perltodo.pod b/pod/perltodo.pod index 5d280e6..3c72432 100644 --- a/pod/perltodo.pod +++ b/pod/perltodo.pod @@ -28,12 +28,29 @@ always be set to true, but it needs to be set to false when F is being compiled. (To stop Perl trying to autoload the C pragma...) -=head2 Create a char *sv_printify(sv, STRLEN *lenp, UV flags) function +=head2 Create a char *sv_pvprintify(sv, STRLEN *lenp, UV flags) For displaying PVs with control characters, embedded nulls, and Unicode. This would be useful for printing warnings, or data and regex dumping, not_a_number(), and so on. +Requirements: should handle both byte and UTF8 strings. isPRINT() +characters printed as-is, character less than 256 as \xHH, Unicode +characters as \x{HHH}. Don't assume ASCII-like, either, get somebody +on EBCDIC to test the output. + +Possible options, controlled by the flags: +- whitespace (other than ' ' of isPRINT()) printed as-is +- use isPRINT_LC() instead of isPRINT() +- print control characters like this: "\cA" +- print control characters like this: "^A" +- non-PRINTables printed as '.' instead of \xHH +- use \OOO instead of \xHH +- use the C/Perl-metacharacters like \n, \t +- have a maximum length for the produced string (read it from *lenp) +- append a "..." to the produced string if the maximum length is exceeded +- really fancy: print unicode characters as \N{...} + =head2 Autoload byte.pm When the lexer sees, for instance, C, it should @@ -65,7 +82,8 @@ Simon Cozens promises to work on this. =head2 Unicode regular expression character classes -They have some tricks Perl doesn't yet implement. +They have some tricks Perl doesn't yet implement like character +class subtraction. http://www.unicode.org/unicode/reports/tr18/ @@ -311,6 +329,12 @@ has changed. Detecting a change is perhaps the difficult bit. There should be a way of restarting the debugger on demand. +=head2 Test Suite for the Debugger + +The debugger is a complex piece of software and fixing something +here may inadvertently break something else over there. To tame +this chaotic behaviour, a test suite is necessary. + =head2 my sub foo { } The basic principle is sound, but there are problems with the semantics