Ports Search

Object-oriented backtrace

Devel::BeginLift 'lifts' arbitrary sub calls to running at compile time - sort of a souped up version of "use constant". It does this via some slightly insane perlguts magic.

Devel::CallChecker makes some new features of the Perl 5.14.0 C API available to XS modules running on older versions of Perl. The features are centred around the function cv_set_call_checker, which allows XS code to attach a magical annotation to a Perl subroutine, resulting in resolvable calls to that subroutine being mutated at compile time by arbitrary C code. This module makes cv_set_call_checker and several supporting functions available. (It is possible to achieve the effect of cv_set_call_checker from XS code on much earlier Perl versions, but it is painful to achieve without the centralised facility.) Devel::CallCheckerprovides the implementation of the functions at runtime (on Perls where they are not provided by the core). It also, at compile time, supplies the C header file and link library which provide access to the functions. In normal use, "callchecker0_h" and "callchecker_linkable" should be called at build time (not authoring time) for the module that wishes to use the C functions.

Devel::Caller - meatier versions of caller SYNOPSIS use Devel::Caller qw(caller_cv); $foo = sub { print "huzzah\n" if $foo == caller_cv(0) }; $foo->(); # prints huzzah use Devel::Caller qw(called_with); sub foo { print called_with(0,1); } foo( my @foo ); # should print '@foo'

Devel::CheckCompiler is a checker for compiler's availability.

The primary purpose of this is to turn a smashed reference address back into a value. Once a reference is treated as a numeric value, you can't dereference it normally; although with this module, you can. Be careful, though, to avoid dereferencing things that don't want to be dereferenced.

Devel::CheckLib provides a way of checking whether a particular library and its headers are available, by attempting to compile a simple program and link against it.

Devel::CheckOS provides a more friendly interface to $^O, and also lets you check for various OS "families" such as "Unix", which includes things like Linux, Solaris, AIX etc.

The Devel::Refactor module is for code refactoring. While Devel::Refactor may be used from Perl programs, it is also designed to be used with the EPIC plug-in for the eclipse integrated development environment.

Declaring constants is very convenient for writing programs, but as they're often inlined by Perl, retrieving their symbolic names can be tricky. This is made worse with low level modules that use constants for bit-twiddling. Devel::Constants makes this much more manageable. It silently wraps around the constant module, intercepting all constant declarations. It builds a hash, associating the values to their names. The names can then be retrieved as necessary.