++ed by:
Graham Knop

NAME

MooX::SetOnce - write-once attributes for Moose

SYNOPSIS

  package MyClass;
  use Moo;
  use MooX::SetOnce;

  has attr => ( is => 'rw', once => 1 );

DESCRIPTION

MooX::SetOnce creates attributes that are not lazy and not set, but that cannot be altered once set.

The logic is very simple: if you try to alter the value of an attribute with the SetOnce trait, either by accessor or writer, and the attribute has a value, it will throw an exception.

If the attribute has a clearer, you may clear the attribute and set it again.

If a Moose module extends or composes a module using MooX::SetOnce, MooseX::SetOnce will be loaded to provide the Moose implementation.

SEE ALSO

MooseX::SetOnce

AUTHOR

haarg - Graham Knop (cpan:HAARG) <haarg@haarg.org>

CONTRIBUTORS

None so far.

COPYRIGHT

Copyright (c) 2013 the MooX::SetOnce "AUTHOR" and "CONTRIBUTORS" as listed above.

LICENSE

This library is free software and may be distributed under the same terms as perl itself.




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