Unable to compare named tuple union type

[straight-shoota]

Comparing a NamedTuple with a UnionType of NamedTuple types fails because the union type seems to match NamedTuple in NamedTuple#==(other : NamedTuple), but does not respond to keys method used in the macro code of NamedTuple#compare_with_other_named_tuple.

Example:

[{bar: nil}, {foo: nil}] == [{bar: nil}, {foo: nil}]

carc.in

The above code fails with

in /usr/lib/crystal/named_tuple.cr:459: undefined method 'keys' for TypeNode of type (NamedTuple(bar: Nil) | NamedTuple(foo: Nil)) (must be a named tuple type)

    {% if T.keys.sort == U.keys.sort %}

Same result for 0.23.1 and master.

[asterite]

How did you get a union of named tuples? What's the use case?

[straight-shoota]

Thanks for the quick fix =)

My use case was actually experimenting with a way to use named tuples instead of Tuple(Symbol, X) for a list of parser tokens.