Aaron Hill af46699f81 Remove Session.used_attrs and move logic to CheckAttrVisitor ... Instead of updating global state to mark attributes as used, we now explicitly emit a warning when an attribute is used in an unsupported position. As a side effect, we are to emit more detailed warning messages (instead of just a generic "unused" message). `Session.check_name` is removed, since its only purpose was to mark the attribute as used. All of the callers are modified to use `Attribute.has_name` Additionally, `AttributeType::AssumedUsed` is removed - an 'assumed used' attribute is implemented by simply not performing any checks in `CheckAttrVisitor` for a particular attribute. We no longer emit unused attribute warnings for the `#[rustc_dummy]` attribute - it's an internal attribute used for tests, so it doesn't mark sense to treat it as 'unused'. With this commit, a large source of global untracked state is removed.		2021-08-21 13:27:27 -05:00
..
ast_validation.rs	Introduce hir::ExprKind::Let - Take 2	2021-08-15 16:18:26 -03:00
feature_gate.rs	Remove Session.used_attrs and move logic to CheckAttrVisitor	2021-08-21 13:27:27 -05:00
lib.rs	replaced feature-gate use with cfg_attr	2021-06-04 09:42:50 -07:00
node_count.rs	ast/hir: Rename field-related structures	2021-03-16 11:41:24 +03:00
show_span.rs	rustc_ast: Do not panic by default when visiting macro calls	2020-11-03 20:38:20 +03:00