If case let, guard case let, for case let

[Nevin]

@Lantua

It’s still there within grammars. if and guard accept list of conditions and case condition is one of those.

It’s worth noting that just because something is permitted by the grammar, that does not automatically guarantee it is valid in the language:

Where is the real grammar for Swift?

The key thing is that there is an important distinction between syntactic and semantic validity. For example, something like class class Foo { ] is not well-formed syntactically. However, class C { protocol P {} } is valid syntax but doesn't make sense semantically. There is nothing in the language grammar preventing a protocol declaration from being nested inside of a class. Instead, it is the type checker's job to enforce such semantic rules.