X-Git-Url: http://git.vpit.fr/?p=perl%2Fmodules%2Findirect.git;a=blobdiff_plain;f=README;h=efc7130ba9c2bf37cc91fa642f84fcc5852ff653;hp=62b2abf864dfa0f29cfdef850d9885c0c2ea6699;hb=8e1c49f42da7671812398f92d819da04c7a41e1b;hpb=79fe38872567977419089da38eac9406bf2d4afa diff --git a/README b/README index 62b2abf..efc7130 100644 --- a/README +++ b/README @@ -2,52 +2,90 @@ NAME indirect - Lexically warn about using the indirect object syntax. VERSION - Version 0.01 + Version 0.15 SYNOPSIS + # In a script no indirect; my $x = new Apple 1, 2, 3; # warns { use indirect; my $y = new Pear; # ok + { + no indirect hook => sub { die "You really wanted $_[0]\->$_[1] at $_[2]:$_[3]" }; + my $z = new Pineapple 'fresh'; # croaks 'You really wanted Pineapple->new at blurp.pm:13' + } } no indirect ':fatal'; if (defied $foo) { ... } # croaks, note the typo + # From the command-line + perl -M-indirect -e 'my $x = new Banana;' # warns + + # Or each time perl is ran + export PERL5OPT="-M-indirect" + perl -e 'my $y = new Coconut;' # warns + DESCRIPTION - When enabled (or disabled as some may prefer, since you actually turn it - on by calling "no indirect"), this pragma warns about indirect object - syntax constructs that may have slipped into your code. This syntax is - now considered harmful, since its parsing has many quirks and its use is - error prone (when "sub" isn't defined, "sub $x" is actually interpreted - as "$x->sub"). + When enabled (or disabled as some may prefer to say, since you actually + turn it on by calling "no indirect"), this pragma warns about indirect + object syntax constructs that may have slipped into your code. This + syntax is now considered harmful, since its parsing has many quirks and + its use is error prone (when "swoosh" isn't defined, "swoosh $x" + actually compiles to "$x->swoosh"). It currently does not warn when the object is enclosed between braces (like "meth { $obj } @args") or for core functions ("print" or "say"). This may change in the future, or may be added as optional features that would be enabled by passing options to "unimport". + This module is not a source filter. + METHODS - "unimport @opts" - Magically called when "no indirect @args" is encountered. Turns the - module on. If @opts contains ':fatal', the module will croak on the - first indirect syntax met. + "unimport [ hook => $hook | ':fatal' ]" + Magically called when "no indirect @opts" is encountered. Turns the + module on. The policy to apply depends on what is first found in @opts : + + * If it's the string ':fatal', the compilation will croak on the first + indirect syntax met. + + * If the key/value pair "hook => $hook" comes first, $hook will be + called for each error with the object name as $_[0], the method name + as $_[1], the current file as $_[2] and the line number as $_[3]. + + * Otherwise, a warning will be emitted for each indirect construct. "import" Magically called at each "use indirect". Turns the module off. +CONSTANTS + "I_THREADSAFE" + True iff the module could have been built with thread-safety features + enabled. + +CAVEATS + The implementation was tweaked to work around several limitations of + vanilla "perl" pragmas : it's thread safe, and doesn't suffer from a + "perl 5.8.x-5.10.0" bug that causes all pragmas to propagate into + "require"d scopes. + + "meth $obj" (no semicolon) at the end of a file won't be seen as an + indirect object syntax, although it will as soon as there is another + token before the end (as in "meth $obj;" or "meth $obj 1"). + + With 5.8 perls, the pragma does not propagate into "eval STRING". This + is due to a shortcoming in the way perl handles the hints hash, which is + addressed in perl 5.10. + DEPENDENCIES - perl 5.9.4. + perl 5.8. XSLoader (standard since perl 5.006). - Tests require IPC::Cmd (standard since 5.9.5). - AUTHOR Vincent Pit, "", . - You can contact me by mail or on #perl @ FreeNode (vincent or - Prof_Vince). + You can contact me by mail or on "irc.perl.org" (vincent). BUGS Please report any bugs or feature requests to "bug-indirect at @@ -61,11 +99,14 @@ SUPPORT perldoc indirect + Tests code coverage report is available at + . + ACKNOWLEDGEMENTS Bram, for motivation and advices. COPYRIGHT & LICENSE - Copyright 2008 Vincent Pit, all rights reserved. + Copyright 2008-2009 Vincent Pit, all rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.