update coherence docs, fix opaque type + generator ice

2022-04-12 16:02:57 +02:00
parent 1491e5cc14
commit 58781edc54
7 changed files with 120 additions and 22 deletions
--- a/compiler/rustc_middle/src/traits/mod.rs
+++ b/compiler/rustc_middle/src/traits/mod.rs
@@ -60,6 +60,9 @@ pub enum Reveal {
    ///     let <() as Assoc>::Output = true;
    /// }
    /// ```
+    ///
+    /// We also do not reveal the hidden type of opaque types during
+    /// type-checking.
    UserFacing,

    /// At codegen time, all monomorphic projections will succeed.