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
37
38
39
40
|
module Tins
module Implement
MESSAGES = {
default: 'method %{method_name} not implemented in module %{module}',
subclass: 'method %{method_name} has to be implemented in '\
'subclasses of %{module}',
submodule: 'method %{method_name} has to be implemented in '\
'submodules of %{module}',
}
def implement(method_name, msg = :default)
method_name.nil? and return
case msg
when ::Symbol
msg = MESSAGES.fetch(msg)
when ::Hash
return implement method_name, msg.fetch(:in)
end
display_method_name = method_name
if m = instance_method(method_name) rescue nil
m.extend Tins::MethodDescription
display_method_name = m.description(style: :name)
end
begin
msg = msg % { method_name: display_method_name, module: self }
rescue KeyError
end
define_method(method_name) do |*|
raise ::NotImplementedError, msg
end
end
def implement_in_submodule(method_name)
implement method_name,
'method %{method_name} has to be implemented in submodules of'\
' %{module}'
end
end
end
|
