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.\" ========================================================================
.\"
.IX Title "Role::HasMessage::Errf 3pm"
.TH Role::HasMessage::Errf 3pm "2013-10-16" "perl v5.18.1" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.SH "NAME"
Role::HasMessage::Errf \- a thing with a String::Errf\-powered message
.SH "VERSION"
.IX Header "VERSION"
version 0.006
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
In your class...
.PP
.Vb 2
\&  package Errfy;
\&  use Moose;
\&
\&  with \*(AqRole::HasMessage::Errf\*(Aq;
\&
\&  has payload => (
\&    is  => \*(Aqro\*(Aq,
\&    isa => \*(AqHashRef\*(Aq,
\&    required => 1,
\&  );
.Ve
.PP
Then...
.PP
.Vb 7
\&  my $thing = Errfy\->new({
\&    message => "%{error_count;error}n encountered at %{when}t",
\&    payload => {
\&      error_count => 2,
\&      when        => time,
\&    },
\&  });
\&
\&  # prints: 2 errors encountered at 2010\-10\-20 19:23:42
\&  print $thing\->message;
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Role::HasMessage::Errf is an implementation of Role::HasMessage that uses
String::Errf to format \f(CW\*(C`sprintf\*(C'\fR\-like message strings.  It adds a
\&\f(CW\*(C`message_fmt\*(C'\fR attribute, initialized by the \f(CW\*(C`message\*(C'\fR argument.  The value
should be a String::Errf format string.
.PP
When the provided \f(CW\*(C`message\*(C'\fR method is called, it will fill in the format
string with the hashref returned by calling the \f(CW\*(C`payload\*(C'\fR method, which \fImust
be implemented by the including class\fR.
.PP
Role::HasMessage::Errf is a parameterized role.
The \f(CW\*(C`default\*(C'\fR parameter lets you set a default format string or callback.  The
\&\f(CW\*(C`lazy\*(C'\fR parameter sets whether or not the \f(CW\*(C`message_fmt\*(C'\fR attribute is lazy.
Setting it lazy will require that a default is provided.
.SH "AUTHOR"
.IX Header "AUTHOR"
Ricardo Signes <rjbs@cpan.org>
.SH "COPYRIGHT AND LICENSE"
.IX Header "COPYRIGHT AND LICENSE"
This software is copyright (c) 2013 by Ricardo Signes.
.PP
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.