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Include Hash::_Key interface in Object for correct key? typecheck #426

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Merged
mame merged 1 commit into from
Apr 7, 2026
+19 −0
Merged

Include Hash::_Key interface in Object for correct key? typecheck #426

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3 changes: 3 additions & 0 deletions lib/typeprof/core/env.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -281,6 +281,9 @@ class Array[Elem]
class Hash[K, V]
include _Each[[K, V]]
end
class Object
include Hash::_Key
end
RBS

# Loading frequently used modules first will reduces constant resolution
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16 changes: 16 additions & 0 deletions scenario/hash/key_check.rb
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Original file line number Diff line number Diff line change
@@ -0,0 +1,16 @@
## update
def test
h = { a: 1, b: 2 }
h.key?(:a)
h.key?("not a symbol")
h.key?(Object.new)
end

test

## assert
class Object
def test: -> bool
end

## diagnostics
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