X-Git-Url: http://git.vpit.fr/?p=perl%2Fmodules%2Findirect.git;a=blobdiff_plain;f=README;h=a563ea0adc3a9a95c73022856fa910878e409c71;hp=88f2bebc41249c95d5ea200d6b4feb6335888ac2;hb=e3cc63669e7d84f338348281f313709bae0be8af;hpb=b47c75970ab200626c92f26eab0f3a4a1123bb6f diff --git a/README b/README index 88f2beb..a563ea0 100644 --- a/README +++ b/README @@ -2,7 +2,7 @@ NAME indirect - Lexically warn about using the indirect object syntax. VERSION - Version 0.17 + Version 0.21 SYNOPSIS # In a script @@ -31,10 +31,14 @@ SYNOPSIS DESCRIPTION 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"). + 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"). In + , + Matt S. Trout gives an example of an indirect construct that can cause a + particularly bewildering error. It currently does not warn for core functions ("print", "say", "exec" or "system"). This may change in the future, or may be added as optional @@ -71,6 +75,11 @@ CONSTANTS True iff the module could have been built with thread-safety features enabled. + "I_FORKSAFE" + True iff this module could have been built with fork-safety features + enabled. This will always be true except on Windows where it's false for + perl 5.10.0 and below . + DIAGNOSTICS "Indirect call of method "%s" on object "%s" at %s line %d." The default warning/exception message thrown when an indirect call on an @@ -80,6 +89,19 @@ DIAGNOSTICS The default warning/exception message thrown when an indirect call on a block is found. +ENVIRONMENT + "PERL_INDIRECT_PM_DISABLE" + If this environment variable is set to true when the pragma is used for + the first time, the XS code won't be loaded and, although the 'indirect' + lexical hint will be set to true in the scope of use, the pragma itself + won't do anything. In this case, the pragma will always be considered to + be thread-safe, and as such "I_THREADSAFE" will be true. This is useful + for disabling "indirect" in production environments. + + Note that clearing this variable after "indirect" was loaded has no + effect. If you want to reenable the pragma later, you also need to + reload it by deleting the 'indirect.pm' entry from %INC. + CAVEATS The implementation was tweaked to work around several limitations of vanilla "perl" pragmas : it's thread safe, and doesn't suffer from a @@ -98,7 +120,7 @@ CAVEATS Hence "my $x = new Class if 0" will be caught. DEPENDENCIES - perl 5.8. + perl 5.8.1. XSLoader (standard since perl 5.006). @@ -129,7 +151,7 @@ ACKNOWLEDGEMENTS reporting issues. COPYRIGHT & LICENSE - Copyright 2008-2009 Vincent Pit, all rights reserved. + Copyright 2008,2009,2010 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.