Sha256: 1c6fa761343c84d71e06e01d2e26f319252542cb95c541b0e39ebd9045a5c378
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Size: 1.39 KB
Versions: 341
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Stored size: 1.39 KB
Contents
# frozen_string_literal: true
# typed: true
# We need to associate data with abstract modules. We could add instance methods to them that
# access ivars, but those methods will unnecessarily pollute the module namespace, and they'd
# have access to other private state and methods that they don't actually need. We also need to
# associate data with arbitrary classes/modules that implement abstract mixins, where we don't
# control the interface at all. So, we access data via these `get` and `set` methods.
#
# Using instance_variable_get/set here is gross, but the alternative is to use a hash keyed on
# `mod`, and we can't trust that arbitrary modules can be added to those, because there are lurky
# modules that override the `hash` method with something completely broken.
module T::Private::Abstract::Data
def self.get(mod, key)
mod.instance_variable_get("@opus_abstract__#{key}")
end
def self.set(mod, key, value)
mod.instance_variable_set("@opus_abstract__#{key}", value)
end
def self.key?(mod, key)
mod.instance_variable_defined?("@opus_abstract__#{key}")
end
# Works like `setdefault` in Python. If key has already been set, return its value. If not,
# insert `key` with a value of `default` and return `default`.
def self.set_default(mod, key, default)
if self.key?(mod, key)
self.get(mod, key)
else
self.set(mod, key, default)
default
end
end
end
Version data entries
341 entries across 341 versions & 1 rubygems