1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
|
require "naught/null_class_builder/command"
module Naught
class NullClassBuilder
module Commands
# Adds implicit conversion methods to the null class
#
# @api private
class DefineImplicitConversions < Command
EMPTY_ARRAY = [] #: Array[untyped]
EMPTY_HASH = {} #: Hash[untyped, untyped]
RETURN_VALUES = {
to_ary: EMPTY_ARRAY.freeze,
to_hash: EMPTY_HASH.freeze,
to_int: 0,
to_str: "".freeze
}.freeze
private_constant :EMPTY_ARRAY, :EMPTY_HASH, :RETURN_VALUES
# Install implicit conversion methods
# @return [void]
# @api private
def call
defer { |subject| RETURN_VALUES.each { |name, value| subject.define_method(name) { value } } }
end
end
end
end
end
|
