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#!/usr/bin/perl |
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package KiokuDB::Role::Verbosity; |
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use Moose::Role; |
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use namespace::clean -except => 'meta'; |
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has verbose => ( |
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isa => "Bool", |
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is => "ro", |
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); |
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sub BUILD { |
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my $self = shift; |
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STDERR->autoflush(1) if $self->verbose; |
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} |
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sub v { |
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my $self = shift; |
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return unless $self->verbose; |
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STDERR->print(@_); |
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} |
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__PACKAGE__ |
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__END__ |
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=pod |
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=head1 NAME |
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KiokuDB::Role::Verbosity - A role for printing diagnosis to STDERR |
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=head1 SYNOPSIS |
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$self->v("blah blah\n"); # only printed if $self->verbose is true |
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=head1 DESCRIPTION |
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This role provides the C<verbose> attribute and a C<v> method that you can use |
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to emit verbose output to C<STDERR>. |