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Versions: 8
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Contents
# frozen_string_literal: true
module Attr
module Gather
# Makes a module registrable
module Registrable
# Error raised when item is already registered
class AlreadyRegisteredError < Error; end
# Error raised when item is not found
class NotFoundError < Attr::Gather::Error; end
def self.extended(klass)
klass.instance_variable_set(:@__storage__, {})
end
# Register item so it can be accessed by name
#
# @param name [Symbol] name of the item
# @yield [options] block to initialize the item
def register(name, &blk)
name = name.to_sym
@__storage__[name] = blk
end
# Resolve a named item
#
# @param name [Symbol]
#
# @return [#call]
def resolve(name, *args, **opts)
block = @__storage__.fetch(name) do
raise NotFoundError,
"no item with name #{name} registered"
end
block.call(*args, **opts)
end
# @api private
def ensure_name_not_already_registered!(name)
return unless @__storage__.key?(name)
raise AlreadyRegisteredError,
"item with name #{name} already registered"
end
end
end
end
Version data entries
8 entries across 8 versions & 1 rubygems