ruby / ruby/rbs

alias method for block declarations

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Dominant language
Ruby
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Description

For methods with the following signature:

def on: (Symbol) { (*untyped) -> void } -> void

I usually use the following in ruby code:

on(&method(:foo))

This works, but rbs/steep complains:

Cannot pass a value of type `::Method` as a block-pass-argument of type `^(*untyped) -> void`
  ::Method <: ^(*untyped) -> void

I think this should be allowed.

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Research direction

Reproduce the reported rbs/steep error using the shown on signature and on(&method(:foo)) example, then trace the block-pass argument compatibility check. The issue names no source file or test; done means this invocation is accepted without the reported type error and coverage exists for the behavior.

Written by the indexing model from the issue text.

Assessment

Tech stack
ruby
Domain
developer-experience, devtools
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
42/100

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