Specio::Constraint::Parameterizable(3)

NAME
Specio::Constraint::Parameterizable - A class which represents parameterizable constraints

VERSION
version 0.29

SYNOPSIS
    my $arrayref = t('ArrayRef');

    my $arrayref_of_int = $arrayref->parameterize( of => t('Int') );

DESCRIPTION
This class implements the API for parameterizable types like "ArrayRef" and "Maybe".

API
This class implements the same API as Specio::Constraint::Simple, with a few additions.

  Specio::Constraint::Parameterizable->new(...)
This class's constructor accepts two additional parameters:

•   parameterized_constraint_generator

    This is a subroutine that generates a new constraint subroutine when the type is parameterized.

    It will be called as a method on the type and will be passed a single argument, the type object for the type parameter.

    This parameter is mutually exclusive with the "parameterized_inline_generator" parameter.

•   parameterized_inline_generator

    This is a subroutine that generates a new inline generator subroutine when the type is parameterized.

    It will be called as a method on the Specio::Constraint::Parameterized object when that object needs to generate inline constraint. It will receive the type parameter as the first argument and the variable name as a string as the second.

    This probably seems fairly confusing, so looking at the examples in the Specio::Library::Builtins code may be helpful.

    This parameter is mutually exclusive with the "parameterized_inline_generator" parameter.

  $type->parameterize(...)
This method takes two arguments. The "of" argument should be an object which does the Specio::Constraint::Role::Interface role, and is required.

The other argument, "declared_at", is optional. If it is not given, then a new Specio::DeclaredAt object is creating using a call stack depth of 1.

This method returns a new Specio::Constraint::Parameterized object.

SUPPORT
Bugs may be submitted through the RT bug tracker <http://rt.cpan.org/Public/Dist/Display.html?Name=Specio> (or bug-specio@rt.cpan.org <mailto:bug-specio@rt.cpan.org>).

I am also usually active on IRC as 'drolsky' on "irc://irc.perl.org".

AUTHOR
Dave Rolsky <autarch@urth.org>

COPYRIGHT AND LICENSE
This software is Copyright (c) 2016 by Dave Rolsky.

This is free software, licensed under:

  The Artistic License 2.0 (GPL Compatible)