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autodie::Util(3)      User Contributed Perl Documentation     autodie::Util(3)
NAME
       autodie::Util - Internal Utility subroutines for autodie and Fatal
SYNOPSIS
           # INTERNAL API for autodie and Fatal only!
           use autodie::Util qw(on_end_of_compile_scope);
           on_end_of_compile_scope(sub { print "Hallo world\n"; });
DESCRIPTION
       Interal Utilities for autodie and Fatal!  This module is not a part of
       autodie's public API.
       This module contains utility subroutines for abstracting away the
       underlying magic of autodie and (ab)uses of "%^H" to call subs at the
       end of a (compile-time) scopes.
       Note that due to how "%^H" works, some of these utilities are only
       useful during the compilation phase of a perl module and relies on the
       internals of how perl handles references in "%^H".
   Methods
       on_end_of_compile_scope
         on_end_of_compile_scope(sub { print "Hallo world\n"; });
       Will invoke a sub at the end of a (compile-time) scope.  The sub is
       called once with no arguments.  Can be called multiple times (even in
       the same "compile-time" scope) to install multiple subs.  Subs are
       called in a "first-in-last-out"-order (FILO or "stack"-order).
       fill_protos
         fill_protos('*$$;$@')
       Given a Perl subroutine prototype, return a list of invocation
       specifications.  Each specification is a listref, where the first
       member is the (minimum) number of arguments for this invocation
       specification.  The remaining arguments are a string representation of
       how to pass the arguments correctly to a sub with the given prototype,
       when called with the given number of arguments.
       The specifications are returned in increasing order of arguments
       starting at 0 (e.g.  ';$') or 1 (e.g.  '$@').  Note that if the
       prototype is "slurpy" (e.g. ends with a "@"), the number of arguments
       for the last specification is a "minimum" number rather than an exact
       number.  This can be detected by the last member of the last
       specification matching m/[@#]_/.
       make_core_trampoline
         make_core_trampoline('CORE::open', 'main', prototype('CORE::open'))
       Creates a trampoline for calling a core sub.  Essentially, a tiny sub
       that figures out how we should be calling our core sub, puts in the
       arguments in the right way, and bounces our control over to it.
       If we could reliably use `goto &` on core builtins, we wouldn't need
       this subroutine.
       install_subs
         install_subs('My::Module', { 'read' => sub { die("Hallo\n"), ... }})
       Given a package name and a hashref mapping names to a subroutine
       reference (or "undef"), this subroutine will install said subroutines
       on their given name in that module.  If a name mapes to "undef", any
       subroutine with that name in the target module will be remove (possibly
       "unshadowing" a CORE sub of same name).
AUTHOR
       Copyright 2013-2014, Niels Thykier <niels AT thykier.net>
LICENSE
       This module is free software.  You may distribute it under the same
       terms as Perl itself.
perl v5.26.3                      2015-07-09                  autodie::Util(3)