(delegate) Sigs for delegate + proposal for delegator defs in RBS #765
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HoneyryderChuck
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By defining such RBS classes such as: ```ruby class Tempfile < Delegator[File] ... ``` with this patch, while building the instance definition, the class assigned to the Delegator definition is then merged with the main class definitions, which achieves the purpose of inheriting method definitions from the delegated class. This is a solution based on a stdlib definition however, so it might not be the best way to move forward.
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HoneyryderChuck
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Aug 25, 2021
| end | ||
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| module Kernel | ||
| def self?.DelegateClass: [A] (Class superclass) ?{ () -> singleton(Delegator) } -> singleton(Delegator) |
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Ideally this should be:
def self?.DelegateClass: [A] (Class superclass) ?{ () -> singleton(Delegator[A]) } -> singleton(Delegator[A])but the parser can't recognize singleton(Delegator[A]).
@soutaro add this along to the other caveats in the description.
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@soutaro given the recent additions in 2.0 around bounded generics, shall we revisit this? I think we still need special syntax for this, i.e. smth like: class Delegator[T]
@delegate_sd_obj: T
# some rbs syntax to say "inherit API from T?
... |
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(tentative) added support for inheriting from delegator classes
By defining such RBS classes such as:
with this patch, while building the instance definition, the class
assigned to the Delegator definition is then merged with the main
class definitions, which achieves the purpose of inheriting method
definitions from the delegated class.
This is a solution based on a stdlib definition however, so it might not
be the best way to move forward.