Specio::Constraint::PaUsertContributedSpecio::Constraint::Parameterizable(3pm)
NAME
Specio::Constraint::Parameterizable - A class which represents
parameterizable constraints
VERSION
version 0.48
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 an 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_constraint_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 at
<https://github.com/houseabsolute/Specio/issues>.
SOURCE
The source code repository for Specio can be found at
<https://github.com/houseabsolute/Specio>.
AUTHOR
Dave Rolsky <autarch@urth.org>
COPYRIGHT AND LICENSE
This software is Copyright (c) 2012 - 2022 by Dave Rolsky.
This is free software, licensed under:
The Artistic License 2.0 (GPL Compatible)
The full text of the license can be found in the LICENSE file included
with this distribution.
perl v5.34.0 2022Specio::Constraint::Parameterizable(3pm)
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