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hinrik/struct_key.cr

Last active November 5, 2017 22:56
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struct_key.cr
abstract struct Foo
end
struct Bar < Foo
end
struct Baz < Foo
end
hash = {} of Foo => Int32
bar = Bar.new
baz = Baz.new
hash[bar] = 3
hash[baz] = 5
p hash
p hash[bar]
p hash[baz] # Missing hash key: Baz() (KeyError)
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