blob: c589d613efc200a9086f850f2990fb958ef76c84 (
plain)
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
30
31
32
33
34
35
36
|
# frozen_string_literal: true
module Gitlab
# A class that can be wrapped around an expensive method call so it's only
# executed when actually needed.
#
# Usage:
#
# object = Gitlab::Lazy.new { some_expensive_work_here }
#
# object['foo']
# object.bar
class Lazy < BasicObject
def initialize(&block)
@block = block
end
def method_missing(...)
__evaluate__
@result.__send__(...) # rubocop:disable GitlabSecurity/PublicSend
end
def respond_to_missing?(name, include_private = false)
__evaluate__
@result.respond_to?(name, include_private) || super
end
private
def __evaluate__
@result = @block.call unless defined?(@result)
end
end
end
|
