From af46699f8104ba5257d0da56d3d817bf8fc751cf Mon Sep 17 00:00:00 2001 From: Aaron Hill Date: Thu, 29 Jul 2021 12:00:41 -0500 Subject: 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. --- compiler/rustc_middle/src/middle/limits.rs | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'compiler/rustc_middle/src/middle') diff --git a/compiler/rustc_middle/src/middle/limits.rs b/compiler/rustc_middle/src/middle/limits.rs index 7ea4902f4bc..20dcb670cd6 100644 --- a/compiler/rustc_middle/src/middle/limits.rs +++ b/compiler/rustc_middle/src/middle/limits.rs @@ -48,7 +48,7 @@ pub fn get_recursion_limit(krate_attrs: &[Attribute], sess: &Session) -> Limit { fn get_limit(krate_attrs: &[Attribute], sess: &Session, name: Symbol, default: usize) -> Limit { for attr in krate_attrs { - if !sess.check_name(attr, name) { + if !attr.has_name(name) { continue; } -- cgit 1.4.1-3-g733a5