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Skip abstract def warnings after first def with matching parameter names #12167

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HertzDevil
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Fixes #12150.

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@beta-ziliani beta-ziliani left a comment

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This is great, thank you! I have just one nitpick suggestion, I'll let you @HertzDevil decide if you prefer to apply it or not

Comment on lines +290 to +291
named_args1 = nil
named_args2 = nil
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A nitpick suggestion (see also below)

Suggested change
named_args1 = nil
named_args2 = nil
named_args1 = [] of String
named_args2 = [] of String

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It's a performance optimization to avoid the (double) array allocation for the (more likely) case that there are no named args. So I think the current code is probably better (although perhaps not as elegant).

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@straight-shoota straight-shoota Jul 1, 2022

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However, we can know beforehand if there could be an allocation for named args (only if args.size > splat_index).

And I suppose the loop could be refactored and split into different stages:

(0...(splat_index || m1.args.size)).each do |i|
  arg1 = m1.args[i]
  arg2 = m2.args[i]
  return false unless arg1.external_name == arg2.external_name
end

if splat_index
  return false unless (m1.args[splat_index].external_name != "") == (m2.args[splat_index].external_name != "")

  named_args1 = m1.args[splat_index..].sort!
  named_args2 = m2.args[splat_index..].sort!

  return false unless named_args1 == named_args2
end

m1.double_splat.nil? == m2.double_splat.nil?

I think this should be semantically equivalent (more or less, haven't tested it). And it's definitely more concise. Not sure about performance characteristics, but I doubt it makes a huge difference.

Comment on lines +299 to +300
(named_args1 ||= [] of String) << arg1.external_name
(named_args2 ||= [] of String) << arg2.external_name
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Suggested change
(named_args1 ||= [] of String) << arg1.external_name
(named_args2 ||= [] of String) << arg2.external_name
named_args1 << arg1.external_name
named_args2 << arg2.external_name

return false unless arg1.external_name == arg2.external_name
end

if named_args1 && named_args2
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Suggested change
if named_args1 && named_args2
unless named_args1.empty? # named_args1.empty? iff named_args2.empty?

@straight-shoota straight-shoota added this to the 1.5.0 milestone Jul 1, 2022
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False positive positional parameter mismatch warning
3 participants