A Solidity enum value is a discriminant case, not a declared member, so it
should hang off its enum with a case_of edge like every other language that
has enums (Java #1719, C#, Swift, Rust, VB.NET). Solidity was the lone
remaining outlier, routing enum values through the same contains path used
for struct fields.
The relation is not cosmetic: case_of targets are excluded from constructor
binding, so an enum value named like a type could previously be mistaken for
one. Struct fields keep contains, since a field is a real declaration.
Add a regression test asserting enum values get case_of (and not contains)
while a struct field keeps contains.
(cherry picked from commit fdd99502d7)
rajatnagda45
4f0eb679bf