Tag yield and await as ControlFlow in semantic highlighting

crates/ide/src/syntax_highlighting/highlight.rs

@@ -254,15 +254,17 @@ pub(super) fn element(
         k if k.is_keyword() => {
             let h = Highlight::new(HlTag::Keyword);
             match k {
-                T![break]
+                T![await]
+                | T![break]
                 | T![continue]
                 | T![else]
                 | T![if]
+                | T![in]
                 | T![loop]
                 | T![match]
                 | T![return]
                 | T![while]
-                | T![in] => h | HlMod::ControlFlow,
+                | T![yield] => h | HlMod::ControlFlow,
                 T![for] if !is_child_of_impl(&element) => h | HlMod::ControlFlow,
                 T![unsafe] => h | HlMod::Unsafe,
                 T![true] | T![false] => HlTag::BoolLiteral.into(),

crates/ide/src/syntax_highlighting/tags.rs

@@ -47,21 +47,27 @@ pub enum HlMod {
     /// `foo` in `fn foo(x: i32)` is a definition, `foo` in `foo(90 + 2)` is
     /// not.
     Definition,
+    /// Doc-strings like this one.
     Documentation,
+    /// Highlighting injection like rust code in doc strings or ra_fixture.
     Injected,
+    /// Mutable binding.
     Mutable,
+    /// Value that is being consumed in a function call
     Consuming,
+    /// Callable item or value.
     Callable,
-    /// Used for associated functions
+    /// Used for associated functions.
     Static,
-    /// Used for items in impls&traits.
+    /// Used for items in traits and impls.
     Associated,
     /// Used for intra doc links in doc injection.
     IntraDocLink,
     /// Used for items in traits and trait impls.
     Trait,
 
-    /// Keep this last!
+    // Keep this last!
+    /// Used for unsafe functions, mutable statics, union accesses and unsafe operations.
     Unsafe,
 }