The SILGen testsuite consists of valid Swift code covering most language
features. We use these tests to verify that no unknown nodes are in the
file's libSyntax tree. That way we will (hopefully) catch any future
changes or additions to the language which are not implemented in
libSyntax.
just for pointer identity.
The current technique for deciding whether that's the case is *extremely*
hacky and need to be replaced with an attribute, but I'm reluctant to
take that on so late in the schedule. The hack is terrible but not too
hard to back out in the future. Anyone who names a method like this just
to get the magic behavior knows well that they are not on the side of
righteousness.
rdar://33265254
