[ruby-core:115146] [Ruby master Misc#19971] Confusing arity of a Proc with implicit rest parameter
From:
"andrykonchin (Andrew Konchin) via ruby-core" <ruby-core@...>
Date:
2023-10-24 13:07:51 UTC
List:
ruby-core #115146
Issue #19971 has been reported by andrykonchin (Andrew Konchin).
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Misc #19971: Confusing arity of a Proc with implicit rest parameter
https://bugs.ruby-lang.org/issues/19971
* Author: andrykonchin (Andrew Konchin)
* Status: Open
* Priority: Normal
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I've noticed that such proc `proc { |a,| }` has arity `1` that means 1 required parameter, but behaves like there is a rest parameter (`proc { |a, *| }`) that has arity `-2` (that means 1 required parameter + rest parameter).
So I am wondering whether it's intentional behaviour and what the rational is behind it.
--
https://bugs.ruby-lang.org/
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