9 files changed, 259 insertions, 158 deletions

diff --git a/crates/ide/src/display/navigation_target.rs b/crates/ide/src/display/navigation_target.rs
index 364be260c..2079c22a3 100644
--- a/crates/ide/src/display/navigation_target.rs
+++ b/crates/ide/src/display/navigation_target.rs
@@ -20,7 +20,7 @@ use syntax::{
 
 use crate::FileSymbol;
 
-/// `NavigationTarget` represents and element in the editor's UI which you can
+/// `NavigationTarget` represents an element in the editor's UI which you can
 /// click on to navigate to a particular piece of code.
 ///
 /// Typically, a `NavigationTarget` corresponds to some element in the source
@@ -35,12 +35,10 @@ pub struct NavigationTarget {
     /// Clients should use this range to answer "is the cursor inside the
     /// element?" question.
     pub full_range: TextRange,
-    /// A "most interesting" range withing the `full_range`.
+    /// A "most interesting" range within the `full_range`.
     ///
     /// Typically, `full_range` is the whole syntax node, including doc
-    /// comments, and `focus_range` is the range of the identifier. "Most
-    /// interesting" range within the full range, typically the range of
-    /// identifier.
+    /// comments, and `focus_range` is the range of the identifier.
     ///
     /// Clients should place the cursor on this range when navigating to this target.
     pub focus_range: Option<TextRange>,
diff --git a/crates/ide/src/references/rename.rs b/crates/ide/src/references/rename.rs
index 2408a0181..175e7a31d 100644
--- a/crates/ide/src/references/rename.rs
+++ b/crates/ide/src/references/rename.rs
@@ -50,6 +50,17 @@ pub(crate) fn prepare_rename(
     let sema = Semantics::new(db);
     let source_file = sema.parse(position.file_id);
     let syntax = source_file.syntax();
+
+    let def = find_definition(&sema, syntax, position)?;
+    match def {
+        Definition::SelfType(_) => bail!("Cannot rename `Self`"),
+        Definition::ModuleDef(ModuleDef::BuiltinType(_)) => bail!("Cannot rename builtin type"),
+        _ => {}
+    };
+    let nav =
+        def.try_to_nav(sema.db).ok_or_else(|| format_err!("No references found at position"))?;
+    nav.focus_range.ok_or_else(|| format_err!("No identifier available to rename"))?;
+
     let name_like = sema
         .find_node_at_offset_with_descend(&syntax, position.offset)
         .ok_or_else(|| format_err!("No references found at position"))?;
@@ -507,7 +518,8 @@ fn source_edit_from_def(
         def.try_to_nav(sema.db).ok_or_else(|| format_err!("No references found at position"))?;
 
     let mut replacement_text = String::new();
-    let mut repl_range = nav.focus_or_full_range();
+    let mut repl_range =
+        nav.focus_range.ok_or_else(|| format_err!("No identifier available to rename"))?;
     if let Definition::Local(local) = def {
         if let Either::Left(pat) = local.source(sema.db).value {
             if matches!(
@@ -626,6 +638,49 @@ foo!(Foo$0);",
     }
 
     #[test]
+    fn test_prepare_rename_tuple_field() {
+        check_prepare(
+            r#"
+struct Foo(i32);
+
+fn baz() {
+    let mut x = Foo(4);
+    x.0$0 = 5;
+}
+"#,
+            expect![[r#"No identifier available to rename"#]],
+        );
+    }
+
+    #[test]
+    fn test_prepare_rename_builtin() {
+        check_prepare(
+            r#"
+fn foo() {
+    let x: i32$0 = 0;
+}
+"#,
+            expect![[r#"Cannot rename builtin type"#]],
+        );
+    }
+
+    #[test]
+    fn test_prepare_rename_self() {
+        check_prepare(
+            r#"
+struct Foo {}
+
+impl Foo {
+    fn foo(self) -> Self$0 {
+        self
+    }
+}
+"#,
+            expect![[r#"Cannot rename `Self`"#]],
+        );
+    }
+
+    #[test]
     fn test_rename_to_underscore() {
         check("_", r#"fn main() { let i$0 = 1; }"#, r#"fn main() { let _ = 1; }"#);
     }
@@ -1787,4 +1842,50 @@ fn foo() {
 "#,
         )
     }
+
+    #[test]
+    fn test_rename_tuple_field() {
+        check(
+            "foo",
+            r#"
+struct Foo(i32);
+
+fn baz() {
+    let mut x = Foo(4);
+    x.0$0 = 5;
+}
+"#,
+            "error: No identifier available to rename",
+        );
+    }
+
+    #[test]
+    fn test_rename_builtin() {
+        check(
+            "foo",
+            r#"
+fn foo() {
+    let x: i32$0 = 0;
+}
+"#,
+            "error: Cannot rename builtin type",
+        );
+    }
+
+    #[test]
+    fn test_rename_self() {
+        check(
+            "foo",
+            r#"
+struct Foo {}
+
+impl Foo {
+    fn foo(self) -> Self$0 {
+        self
+    }
+}
+"#,
+            "error: Cannot rename `Self`",
+        );
+    }
 }
diff --git a/crates/ide/src/syntax_highlighting/highlight.rs b/crates/ide/src/syntax_highlighting/highlight.rs
index 18552459b..b586dcc17 100644
--- a/crates/ide/src/syntax_highlighting/highlight.rs
+++ b/crates/ide/src/syntax_highlighting/highlight.rs
@@ -1,6 +1,6 @@
 //! Computes color for a single element.
 
-use hir::{AsAssocItem, AssocItemContainer, Semantics, VariantDef};
+use hir::{AsAssocItem, Semantics};
 use ide_db::{
     defs::{Definition, NameClass, NameRefClass},
     RootDatabase, SymbolKind,
@@ -45,28 +45,26 @@ pub(super) fn element(
             };
 
             match name_kind {
-                Some(NameClass::ExternCrate(_)) => HlTag::Symbol(SymbolKind::Module).into(),
+                Some(NameClass::ExternCrate(_)) => SymbolKind::Module.into(),
                 Some(NameClass::Definition(def)) => highlight_def(db, def) | HlMod::Definition,
                 Some(NameClass::ConstReference(def)) => highlight_def(db, def),
                 Some(NameClass::PatFieldShorthand { field_ref, .. }) => {
                     let mut h = HlTag::Symbol(SymbolKind::Field).into();
                     if let Definition::Field(field) = field_ref {
-                        if let VariantDef::Union(_) = field.parent_def(db) {
+                        if let hir::VariantDef::Union(_) = field.parent_def(db) {
                             h |= HlMod::Unsafe;
                         }
                     }
-
                     h
                 }
                 None => highlight_name_by_syntax(name) | HlMod::Definition,
             }
         }
-
         // Highlight references like the definitions they resolve to
         NAME_REF if element.ancestors().any(|it| it.kind() == ATTR) => {
             // even though we track whether we are in an attribute or not we still need this special case
             // as otherwise we would emit unresolved references for name refs inside attributes
-            Highlight::from(HlTag::Symbol(SymbolKind::Function))
+            SymbolKind::Function.into()
         }
         NAME_REF => {
             let name_ref = element.into_node().and_then(ast::NameRef::cast).unwrap();
@@ -74,7 +72,7 @@ pub(super) fn element(
                 let is_self = name_ref.self_token().is_some();
                 let h = match NameRefClass::classify(sema, &name_ref) {
                     Some(name_kind) => match name_kind {
-                        NameRefClass::ExternCrate(_) => HlTag::Symbol(SymbolKind::Module).into(),
+                        NameRefClass::ExternCrate(_) => SymbolKind::Module.into(),
                         NameRefClass::Definition(def) => {
                             if let Definition::Local(local) = &def {
                                 if let Some(name) = local.name(db) {
@@ -95,7 +93,7 @@ pub(super) fn element(
                             if let Some(parent) = name_ref.syntax().parent() {
                                 if matches!(parent.kind(), FIELD_EXPR | RECORD_PAT_FIELD) {
                                     if let Definition::Field(field) = def {
-                                        if let VariantDef::Union(_) = field.parent_def(db) {
+                                        if let hir::VariantDef::Union(_) = field.parent_def(db) {
                                             h |= HlMod::Unsafe;
                                         }
                                     }
@@ -104,9 +102,7 @@ pub(super) fn element(
 
                             h
                         }
-                        NameRefClass::FieldShorthand { .. } => {
-                            HlTag::Symbol(SymbolKind::Field).into()
-                        }
+                        NameRefClass::FieldShorthand { .. } => SymbolKind::Field.into(),
                     },
                     None if syntactic_name_ref_highlighting => {
                         highlight_name_ref_by_syntax(name_ref, sema)
@@ -114,7 +110,7 @@ pub(super) fn element(
                     None => HlTag::UnresolvedReference.into(),
                 };
                 if h.tag == HlTag::Symbol(SymbolKind::Module) && is_self {
-                    HlTag::Symbol(SymbolKind::SelfParam).into()
+                    SymbolKind::SelfParam.into()
                 } else {
                     h
                 }
@@ -135,7 +131,7 @@ pub(super) fn element(
         INT_NUMBER | FLOAT_NUMBER => HlTag::NumericLiteral.into(),
         BYTE => HlTag::ByteLiteral.into(),
         CHAR => HlTag::CharLiteral.into(),
-        QUESTION => Highlight::new(HlTag::Operator(HlOperator::Other)) | HlMod::ControlFlow,
+        QUESTION => HlTag::Operator(HlOperator::Other) | HlMod::ControlFlow,
         LIFETIME => {
             let lifetime = element.into_node().and_then(ast::Lifetime::cast).unwrap();
 
@@ -143,44 +139,31 @@ pub(super) fn element(
                 Some(NameClass::Definition(def)) => highlight_def(db, def) | HlMod::Definition,
                 None => match NameRefClass::classify_lifetime(sema, &lifetime) {
                     Some(NameRefClass::Definition(def)) => highlight_def(db, def),
-                    _ => Highlight::new(HlTag::Symbol(SymbolKind::LifetimeParam)),
+                    _ => SymbolKind::LifetimeParam.into(),
                 },
-                _ => Highlight::new(HlTag::Symbol(SymbolKind::LifetimeParam)) | HlMod::Definition,
+                _ => Highlight::from(SymbolKind::LifetimeParam) | HlMod::Definition,
             }
         }
         p if p.is_punct() => match p {
-            T![&] if element.parent().and_then(ast::BinExpr::cast).is_some() => {
-                HlTag::Operator(HlOperator::Bitwise).into()
-            }
+            T![&] if parent_matches::<ast::BinExpr>(&element) => HlOperator::Bitwise.into(),
             T![&] => {
                 let h = HlTag::Operator(HlOperator::Other).into();
                 let is_unsafe = element
                     .parent()
                     .and_then(ast::RefExpr::cast)
-                    .map(|ref_expr| sema.is_unsafe_ref_expr(&ref_expr))
-                    .unwrap_or(false);
+                    .map_or(false, |ref_expr| sema.is_unsafe_ref_expr(&ref_expr));
                 if is_unsafe {
                     h | HlMod::Unsafe
                 } else {
                     h
                 }
             }
-            T![::] | T![->] | T![=>] | T![..] | T![=] | T![@] | T![.] => {
-                HlTag::Operator(HlOperator::Other).into()
-            }
-            T![!] if element.parent().and_then(ast::MacroCall::cast).is_some() => {
-                HlTag::Symbol(SymbolKind::Macro).into()
-            }
-            T![!] if element.parent().and_then(ast::NeverType::cast).is_some() => {
-                HlTag::BuiltinType.into()
-            }
-            T![!] if element.parent().and_then(ast::PrefixExpr::cast).is_some() => {
-                HlTag::Operator(HlOperator::Logical).into()
-            }
-            T![*] if element.parent().and_then(ast::PtrType::cast).is_some() => {
-                HlTag::Keyword.into()
-            }
-            T![*] if element.parent().and_then(ast::PrefixExpr::cast).is_some() => {
+            T![::] | T![->] | T![=>] | T![..] | T![=] | T![@] | T![.] => HlOperator::Other.into(),
+            T![!] if parent_matches::<ast::MacroCall>(&element) => SymbolKind::Macro.into(),
+            T![!] if parent_matches::<ast::NeverType>(&element) => HlTag::BuiltinType.into(),
+            T![!] if parent_matches::<ast::PrefixExpr>(&element) => HlOperator::Logical.into(),
+            T![*] if parent_matches::<ast::PtrType>(&element) => HlTag::Keyword.into(),
+            T![*] if parent_matches::<ast::PrefixExpr>(&element) => {
                 let prefix_expr = element.parent().and_then(ast::PrefixExpr::cast)?;
 
                 let expr = prefix_expr.expr()?;
@@ -188,12 +171,12 @@ pub(super) fn element(
                 if ty.is_raw_ptr() {
                     HlTag::Operator(HlOperator::Other) | HlMod::Unsafe
                 } else if let Some(ast::PrefixOp::Deref) = prefix_expr.op_kind() {
-                    HlTag::Operator(HlOperator::Other).into()
+                    HlOperator::Other.into()
                 } else {
-                    HlTag::Punctuation(HlPunct::Other).into()
+                    HlPunct::Other.into()
                 }
             }
-            T![-] if element.parent().and_then(ast::PrefixExpr::cast).is_some() => {
+            T![-] if parent_matches::<ast::PrefixExpr>(&element) => {
                 let prefix_expr = element.parent().and_then(ast::PrefixExpr::cast)?;
 
                 let expr = prefix_expr.expr()?;
@@ -203,41 +186,31 @@ pub(super) fn element(
                 }
                 .into()
             }
-            _ if element.parent().and_then(ast::PrefixExpr::cast).is_some() => {
-                HlTag::Operator(HlOperator::Other).into()
-            }
+            _ if parent_matches::<ast::PrefixExpr>(&element) => HlOperator::Other.into(),
             T![+] | T![-] | T![*] | T![/] | T![+=] | T![-=] | T![*=] | T![/=]
-                if element.parent().and_then(ast::BinExpr::cast).is_some() =>
+                if parent_matches::<ast::BinExpr>(&element) =>
             {
-                HlTag::Operator(HlOperator::Arithmetic).into()
+                HlOperator::Arithmetic.into()
             }
             T![|] | T![&] | T![!] | T![^] | T![|=] | T![&=] | T![^=]
-                if element.parent().and_then(ast::BinExpr::cast).is_some() =>
+                if parent_matches::<ast::BinExpr>(&element) =>
             {
-                HlTag::Operator(HlOperator::Bitwise).into()
+                HlOperator::Bitwise.into()
             }
-            T![&&] | T![||] if element.parent().and_then(ast::BinExpr::cast).is_some() => {
-                HlTag::Operator(HlOperator::Logical).into()
+            T![&&] | T![||] if parent_matches::<ast::BinExpr>(&element) => {
+                HlOperator::Logical.into()
             }
             T![>] | T![<] | T![==] | T![>=] | T![<=] | T![!=]
-                if element.parent().and_then(ast::BinExpr::cast).is_some() =>
+                if parent_matches::<ast::BinExpr>(&element) =>
             {
-                HlTag::Operator(HlOperator::Comparison).into()
-            }
-            _ if element.parent().and_then(ast::BinExpr::cast).is_some() => {
-                HlTag::Operator(HlOperator::Other).into()
-            }
-            _ if element.parent().and_then(ast::RangeExpr::cast).is_some() => {
-                HlTag::Operator(HlOperator::Other).into()
+                HlOperator::Comparison.into()
             }
-            _ if element.parent().and_then(ast::RangePat::cast).is_some() => {
-                HlTag::Operator(HlOperator::Other).into()
-            }
-            _ if element.parent().and_then(ast::RestPat::cast).is_some() => {
-                HlTag::Operator(HlOperator::Other).into()
-            }
-            _ if element.parent().and_then(ast::Attr::cast).is_some() => HlTag::Attribute.into(),
-            kind => HlTag::Punctuation(match kind {
+            _ if parent_matches::<ast::BinExpr>(&element) => HlOperator::Other.into(),
+            _ if parent_matches::<ast::RangeExpr>(&element) => HlOperator::Other.into(),
+            _ if parent_matches::<ast::RangePat>(&element) => HlOperator::Other.into(),
+            _ if parent_matches::<ast::RestPat>(&element) => HlOperator::Other.into(),
+            _ if parent_matches::<ast::Attr>(&element) => HlTag::Attribute.into(),
+            kind => match kind {
                 T!['['] | T![']'] => HlPunct::Bracket,
                 T!['{'] | T!['}'] => HlPunct::Brace,
                 T!['('] | T![')'] => HlPunct::Parenthesis,
@@ -247,22 +220,24 @@ pub(super) fn element(
                 T![;] => HlPunct::Semi,
                 T![.] => HlPunct::Dot,
                 _ => HlPunct::Other,
-            })
+            }
             .into(),
         },
 
         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(),
@@ -301,7 +276,6 @@ pub(super) fn element(
         hash((name, shadow_count))
     }
 }
-
 fn highlight_def(db: &RootDatabase, def: Definition) -> Highlight {
     match def {
         Definition::Macro(_) => HlTag::Symbol(SymbolKind::Macro),
@@ -312,17 +286,22 @@ fn highlight_def(db: &RootDatabase, def: Definition) -> Highlight {
                 let mut h = Highlight::new(HlTag::Symbol(SymbolKind::Function));
                 if let Some(item) = func.as_assoc_item(db) {
                     h |= HlMod::Associated;
-                    if func.self_param(db).is_none() {
-                        h |= HlMod::Static
+                    match func.self_param(db) {
+                        Some(sp) => {
+                            if let hir::Access::Exclusive = sp.access(db) {
+                                h |= HlMod::Mutable;
+                            }
+                        }
+                        None => h |= HlMod::Static,
                     }
 
                     match item.container(db) {
-                        AssocItemContainer::Impl(i) => {
+                        hir::AssocItemContainer::Impl(i) => {
                             if i.trait_(db).is_some() {
                                 h |= HlMod::Trait;
                             }
                         }
-                        AssocItemContainer::Trait(_t) => {
+                        hir::AssocItemContainer::Trait(_t) => {
                             h |= HlMod::Trait;
                         }
                     }
@@ -342,12 +321,12 @@ fn highlight_def(db: &RootDatabase, def: Definition) -> Highlight {
                 if let Some(item) = konst.as_assoc_item(db) {
                     h |= HlMod::Associated;
                     match item.container(db) {
-                        AssocItemContainer::Impl(i) => {
+                        hir::AssocItemContainer::Impl(i) => {
                             if i.trait_(db).is_some() {
                                 h |= HlMod::Trait;
                             }
                         }
-                        AssocItemContainer::Trait(_t) => {
+                        hir::AssocItemContainer::Trait(_t) => {
                             h |= HlMod::Trait;
                         }
                     }
@@ -361,12 +340,12 @@ fn highlight_def(db: &RootDatabase, def: Definition) -> Highlight {
                 if let Some(item) = type_.as_assoc_item(db) {
                     h |= HlMod::Associated;
                     match item.container(db) {
-                        AssocItemContainer::Impl(i) => {
+                        hir::AssocItemContainer::Impl(i) => {
                             if i.trait_(db).is_some() {
                                 h |= HlMod::Trait;
                             }
                         }
-                        AssocItemContainer::Trait(_t) => {
+                        hir::AssocItemContainer::Trait(_t) => {
                             h |= HlMod::Trait;
                         }
                     }
@@ -425,7 +404,7 @@ fn highlight_method_call(
     method_call: &ast::MethodCallExpr,
 ) -> Option<Highlight> {
     let func = sema.resolve_method_call(&method_call)?;
-    let mut h = HlTag::Symbol(SymbolKind::Function).into();
+    let mut h = SymbolKind::Function.into();
     h |= HlMod::Associated;
     if func.is_unsafe(sema.db) || sema.is_unsafe_method_call(&method_call) {
         h |= HlMod::Unsafe;
@@ -461,20 +440,20 @@ fn highlight_name_by_syntax(name: ast::Name) -> Highlight {
     };
 
     let tag = match parent.kind() {
-        STRUCT => HlTag::Symbol(SymbolKind::Struct),
-        ENUM => HlTag::Symbol(SymbolKind::Enum),
-        VARIANT => HlTag::Symbol(SymbolKind::Variant),
-        UNION => HlTag::Symbol(SymbolKind::Union),
-        TRAIT => HlTag::Symbol(SymbolKind::Trait),
-        TYPE_ALIAS => HlTag::Symbol(SymbolKind::TypeAlias),
-        TYPE_PARAM => HlTag::Symbol(SymbolKind::TypeParam),
-        RECORD_FIELD => HlTag::Symbol(SymbolKind::Field),
-        MODULE => HlTag::Symbol(SymbolKind::Module),
-        FN => HlTag::Symbol(SymbolKind::Function),
-        CONST => HlTag::Symbol(SymbolKind::Const),
-        STATIC => HlTag::Symbol(SymbolKind::Static),
-        IDENT_PAT => HlTag::Symbol(SymbolKind::Local),
-        _ => default,
+        STRUCT => SymbolKind::Struct,
+        ENUM => SymbolKind::Enum,
+        VARIANT => SymbolKind::Variant,
+        UNION => SymbolKind::Union,
+        TRAIT => SymbolKind::Trait,
+        TYPE_ALIAS => SymbolKind::TypeAlias,
+        TYPE_PARAM => SymbolKind::TypeParam,
+        RECORD_FIELD => SymbolKind::Field,
+        MODULE => SymbolKind::Module,
+        FN => SymbolKind::Function,
+        CONST => SymbolKind::Const,
+        STATIC => SymbolKind::Static,
+        IDENT_PAT => SymbolKind::Local,
+        _ => return default.into(),
     };
 
     tag.into()
@@ -492,20 +471,15 @@ fn highlight_name_ref_by_syntax(name: ast::NameRef, sema: &Semantics<RootDatabas
         METHOD_CALL_EXPR => {
             return ast::MethodCallExpr::cast(parent)
                 .and_then(|it| highlight_method_call(sema, &it))
-                .unwrap_or_else(|| HlTag::Symbol(SymbolKind::Function).into());
+                .unwrap_or_else(|| SymbolKind::Function.into());
         }
         FIELD_EXPR => {
             let h = HlTag::Symbol(SymbolKind::Field);
             let is_union = ast::FieldExpr::cast(parent)
-                .and_then(|field_expr| {
-                    let field = sema.resolve_field(&field_expr)?;
-                    Some(if let VariantDef::Union(_) = field.parent_def(sema.db) {
-                        true
-                    } else {
-                        false
-                    })
-                })
-                .unwrap_or(false);
+                .and_then(|field_expr| sema.resolve_field(&field_expr))
+                .map_or(false, |field| {
+                    matches!(field.parent_def(sema.db), hir::VariantDef::Union(_))
+                });
             if is_union {
                 h | HlMod::Unsafe
             } else {
@@ -522,9 +496,9 @@ fn highlight_name_ref_by_syntax(name: ast::NameRef, sema: &Semantics<RootDatabas
                 _ => {
                     // within path, decide whether it is module or adt by checking for uppercase name
                     return if name.text().chars().next().unwrap_or_default().is_uppercase() {
-                        HlTag::Symbol(SymbolKind::Struct)
+                        SymbolKind::Struct
                     } else {
-                        HlTag::Symbol(SymbolKind::Module)
+                        SymbolKind::Module
                     }
                     .into();
                 }
@@ -535,11 +509,11 @@ fn highlight_name_ref_by_syntax(name: ast::NameRef, sema: &Semantics<RootDatabas
             };
 
             match parent.kind() {
-                CALL_EXPR => HlTag::Symbol(SymbolKind::Function).into(),
+                CALL_EXPR => SymbolKind::Function.into(),
                 _ => if name.text().chars().next().unwrap_or_default().is_uppercase() {
-                    HlTag::Symbol(SymbolKind::Struct)
+                    SymbolKind::Struct
                 } else {
-                    HlTag::Symbol(SymbolKind::Const)
+                    SymbolKind::Const
                 }
                 .into(),
             }
@@ -574,6 +548,11 @@ fn parents_match(mut node: NodeOrToken<SyntaxNode, SyntaxToken>, mut kinds: &[Sy
     kinds.len() == 0
 }
 
+#[inline]
+fn parent_matches<N: AstNode>(element: &SyntaxElement) -> bool {
+    element.parent().map_or(false, |it| N::can_cast(it.kind()))
+}
+
 fn is_child_of_impl(element: &SyntaxElement) -> bool {
     match element.parent() {
         Some(e) => e.kind() == IMPL,
diff --git a/crates/ide/src/syntax_highlighting/tags.rs b/crates/ide/src/syntax_highlighting/tags.rs
index e58392d67..a304b3250 100644
--- a/crates/ide/src/syntax_highlighting/tags.rs
+++ b/crates/ide/src/syntax_highlighting/tags.rs
@@ -40,28 +40,33 @@ pub enum HlTag {
 #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, PartialOrd, Ord)]
 #[repr(u8)]
 pub enum HlMod {
+    /// Used for items in traits and impls.
+    Associated = 0,
     /// Used to differentiate individual elements within attributes.
-    Attribute = 0,
+    Attribute,
+    /// Callable item or value.
+    Callable,
+    /// Value that is being consumed in a function call
+    Consuming,
     /// Used with keywords like `if` and `break`.
     ControlFlow,
     /// `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,
-    Consuming,
-    Callable,
-    /// Used for associated functions
-    Static,
-    /// Used for items in impls&traits.
-    Associated,
     /// Used for intra doc links in doc injection.
     IntraDocLink,
+    /// Mutable binding.
+    Mutable,
+    /// Used for associated functions.
+    Static,
     /// 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,
 }
 
@@ -169,17 +174,17 @@ impl fmt::Display for HlTag {
 
 impl HlMod {
     const ALL: &'static [HlMod; HlMod::Unsafe as u8 as usize + 1] = &[
+        HlMod::Associated,
         HlMod::Attribute,
+        HlMod::Callable,
+        HlMod::Consuming,
         HlMod::ControlFlow,
         HlMod::Definition,
         HlMod::Documentation,
-        HlMod::IntraDocLink,
         HlMod::Injected,
+        HlMod::IntraDocLink,
         HlMod::Mutable,
-        HlMod::Consuming,
-        HlMod::Callable,
         HlMod::Static,
-        HlMod::Associated,
         HlMod::Trait,
         HlMod::Unsafe,
     ];
@@ -229,6 +234,24 @@ impl From<HlTag> for Highlight {
     }
 }
 
+impl From<HlOperator> for Highlight {
+    fn from(op: HlOperator) -> Highlight {
+        Highlight::new(HlTag::Operator(op))
+    }
+}
+
+impl From<HlPunct> for Highlight {
+    fn from(punct: HlPunct) -> Highlight {
+        Highlight::new(HlTag::Punctuation(punct))
+    }
+}
+
+impl From<SymbolKind> for Highlight {
+    fn from(sym: SymbolKind) -> Highlight {
+        Highlight::new(HlTag::Symbol(sym))
+    }
+}
+
 impl Highlight {
     pub(crate) fn new(tag: HlTag) -> Highlight {
         Highlight { tag, mods: HlMods::default() }
diff --git a/crates/ide/src/syntax_highlighting/test_data/highlight_assoc_functions.html b/crates/ide/src/syntax_highlighting/test_data/highlight_assoc_functions.html
index 8cde3906c..a0ea1db34 100644
--- a/crates/ide/src/syntax_highlighting/test_data/highlight_assoc_functions.html
+++ b/crates/ide/src/syntax_highlighting/test_data/highlight_assoc_functions.html
@@ -42,17 +42,17 @@ pre                 { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
 <span class="keyword">struct</span> <span class="struct declaration">foo</span> <span class="brace">{</span><span class="brace">}</span>
 
 <span class="keyword">impl</span> <span class="struct">foo</span> <span class="brace">{</span>
-    <span class="keyword">pub</span> <span class="keyword">fn</span> <span class="function declaration static associated">is_static</span><span class="parenthesis">(</span><span class="parenthesis">)</span> <span class="brace">{</span><span class="brace">}</span>
-    <span class="keyword">pub</span> <span class="keyword">fn</span> <span class="function declaration associated">is_not_static</span><span class="parenthesis">(</span><span class="operator">&</span><span class="self_keyword declaration">self</span><span class="parenthesis">)</span> <span class="brace">{</span><span class="brace">}</span>
+    <span class="keyword">pub</span> <span class="keyword">fn</span> <span class="function associated declaration static">is_static</span><span class="parenthesis">(</span><span class="parenthesis">)</span> <span class="brace">{</span><span class="brace">}</span>
+    <span class="keyword">pub</span> <span class="keyword">fn</span> <span class="function associated declaration">is_not_static</span><span class="parenthesis">(</span><span class="operator">&</span><span class="self_keyword declaration">self</span><span class="parenthesis">)</span> <span class="brace">{</span><span class="brace">}</span>
 <span class="brace">}</span>
 
 <span class="keyword">trait</span> <span class="trait declaration">t</span> <span class="brace">{</span>
-    <span class="keyword">fn</span> <span class="function declaration static associated trait">t_is_static</span><span class="parenthesis">(</span><span class="parenthesis">)</span> <span class="brace">{</span><span class="brace">}</span>
-    <span class="keyword">fn</span> <span class="function declaration associated trait">t_is_not_static</span><span class="parenthesis">(</span><span class="operator">&</span><span class="self_keyword declaration">self</span><span class="parenthesis">)</span> <span class="brace">{</span><span class="brace">}</span>
+    <span class="keyword">fn</span> <span class="function associated declaration static trait">t_is_static</span><span class="parenthesis">(</span><span class="parenthesis">)</span> <span class="brace">{</span><span class="brace">}</span>
+    <span class="keyword">fn</span> <span class="function associated declaration trait">t_is_not_static</span><span class="parenthesis">(</span><span class="operator">&</span><span class="self_keyword declaration">self</span><span class="parenthesis">)</span> <span class="brace">{</span><span class="brace">}</span>
 <span class="brace">}</span>
 
 <span class="keyword">impl</span> <span class="trait">t</span> <span class="keyword">for</span> <span class="struct">foo</span> <span class="brace">{</span>
-    <span class="keyword">pub</span> <span class="keyword">fn</span> <span class="function declaration static associated trait">is_static</span><span class="parenthesis">(</span><span class="parenthesis">)</span> <span class="brace">{</span><span class="brace">}</span>
-    <span class="keyword">pub</span> <span class="keyword">fn</span> <span class="function declaration associated trait">is_not_static</span><span class="parenthesis">(</span><span class="operator">&</span><span class="self_keyword declaration">self</span><span class="parenthesis">)</span> <span class="brace">{</span><span class="brace">}</span>
+    <span class="keyword">pub</span> <span class="keyword">fn</span> <span class="function associated declaration static trait">is_static</span><span class="parenthesis">(</span><span class="parenthesis">)</span> <span class="brace">{</span><span class="brace">}</span>
+    <span class="keyword">pub</span> <span class="keyword">fn</span> <span class="function associated declaration trait">is_not_static</span><span class="parenthesis">(</span><span class="operator">&</span><span class="self_keyword declaration">self</span><span class="parenthesis">)</span> <span class="brace">{</span><span class="brace">}</span>
 <span class="brace">}</span>
         </code></pre>
\ No newline at end of file
diff --git a/crates/ide/src/syntax_highlighting/test_data/highlight_doctest.html b/crates/ide/src/syntax_highlighting/test_data/highlight_doctest.html
index 6ee6d85fb..638f42c2f 100644
--- a/crates/ide/src/syntax_highlighting/test_data/highlight_doctest.html
+++ b/crates/ide/src/syntax_highlighting/test_data/highlight_doctest.html
@@ -50,7 +50,7 @@ pre                 { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
     <span class="comment">//    KILLER WHALE</span>
     <span class="comment documentation">/// </span><span class="string_literal injected">    Ishmael."</span><span class="semicolon injected">;</span>
     <span class="comment documentation">/// ```</span>
-    <span class="keyword">pub</span> <span class="keyword">const</span> <span class="constant declaration associated">bar</span><span class="colon">:</span> <span class="builtin_type">bool</span> <span class="operator">=</span> <span class="bool_literal">true</span><span class="semicolon">;</span>
+    <span class="keyword">pub</span> <span class="keyword">const</span> <span class="constant associated declaration">bar</span><span class="colon">:</span> <span class="builtin_type">bool</span> <span class="operator">=</span> <span class="bool_literal">true</span><span class="semicolon">;</span>
 
     <span class="comment documentation">/// Constructs a new `Foo`.</span>
     <span class="comment documentation">///</span>
@@ -60,7 +60,7 @@ pre                 { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
     <span class="comment documentation">/// #</span><span class="none injected"> </span><span class="attribute attribute injected">#</span><span class="attribute attribute injected">!</span><span class="attribute attribute injected">[</span><span class="function attribute injected">allow</span><span class="parenthesis attribute injected">(</span><span class="attribute attribute injected">unused_mut</span><span class="parenthesis attribute injected">)</span><span class="attribute attribute injected">]</span>
     <span class="comment documentation">/// </span><span class="keyword injected">let</span><span class="none injected"> </span><span class="keyword injected">mut</span><span class="none injected"> </span><span class="variable declaration injected mutable">foo</span><span class="colon injected">:</span><span class="none injected"> </span><span class="struct injected">Foo</span><span class="none injected"> </span><span class="operator injected">=</span><span class="none injected"> </span><span class="struct injected">Foo</span><span class="operator injected">::</span><span class="function injected">new</span><span class="parenthesis injected">(</span><span class="parenthesis injected">)</span><span class="semicolon injected">;</span>
     <span class="comment documentation">/// ```</span>
-    <span class="keyword">pub</span> <span class="keyword">const</span> <span class="keyword">fn</span> <span class="function declaration static associated">new</span><span class="parenthesis">(</span><span class="parenthesis">)</span> <span class="operator">-&gt;</span> <span class="struct">Foo</span> <span class="brace">{</span>
+    <span class="keyword">pub</span> <span class="keyword">const</span> <span class="keyword">fn</span> <span class="function associated declaration static">new</span><span class="parenthesis">(</span><span class="parenthesis">)</span> <span class="operator">-&gt;</span> <span class="struct">Foo</span> <span class="brace">{</span>
         <span class="struct">Foo</span> <span class="brace">{</span> <span class="field">bar</span><span class="colon">:</span> <span class="bool_literal">true</span> <span class="brace">}</span>
     <span class="brace">}</span>
 
@@ -94,15 +94,15 @@ pre                 { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
     <span class="comment documentation">/// ```sh</span>
     <span class="comment documentation">/// echo 1</span>
     <span class="comment documentation">/// ```</span>
-    <span class="keyword">pub</span> <span class="keyword">fn</span> <span class="function declaration associated">foo</span><span class="parenthesis">(</span><span class="operator">&</span><span class="self_keyword declaration">self</span><span class="parenthesis">)</span> <span class="operator">-&gt;</span> <span class="builtin_type">bool</span> <span class="brace">{</span>
+    <span class="keyword">pub</span> <span class="keyword">fn</span> <span class="function associated declaration">foo</span><span class="parenthesis">(</span><span class="operator">&</span><span class="self_keyword declaration">self</span><span class="parenthesis">)</span> <span class="operator">-&gt;</span> <span class="builtin_type">bool</span> <span class="brace">{</span>
         <span class="bool_literal">true</span>
     <span class="brace">}</span>
 <span class="brace">}</span>
 
-<span class="comment documentation">/// </span><span class="struct documentation intra_doc_link injected">[`Foo`](Foo)</span><span class="comment documentation"> is a struct</span>
-<span class="comment documentation">/// This function is &gt; </span><span class="function documentation intra_doc_link injected">[`all_the_links`](all_the_links)</span><span class="comment documentation"> &lt;</span>
+<span class="comment documentation">/// </span><span class="struct documentation injected intra_doc_link">[`Foo`](Foo)</span><span class="comment documentation"> is a struct</span>
+<span class="comment documentation">/// This function is &gt; </span><span class="function documentation injected intra_doc_link">[`all_the_links`](all_the_links)</span><span class="comment documentation"> &lt;</span>
 <span class="comment documentation">/// [`noop`](noop) is a macro below</span>
-<span class="comment documentation">/// </span><span class="struct documentation intra_doc_link injected">[`Item`]</span><span class="comment documentation"> is a struct in the module </span><span class="module documentation intra_doc_link injected">[`module`]</span>
+<span class="comment documentation">/// </span><span class="struct documentation injected intra_doc_link">[`Item`]</span><span class="comment documentation"> is a struct in the module </span><span class="module documentation injected intra_doc_link">[`module`]</span>
 <span class="comment documentation">///</span>
 <span class="comment documentation">/// [`Item`]: module::Item</span>
 <span class="comment documentation">/// [mix_and_match]: ThisShouldntResolve</span>
diff --git a/crates/ide/src/syntax_highlighting/test_data/highlight_injection.html b/crates/ide/src/syntax_highlighting/test_data/highlight_injection.html
index 7c6694a27..6202a03ce 100644
--- a/crates/ide/src/syntax_highlighting/test_data/highlight_injection.html
+++ b/crates/ide/src/syntax_highlighting/test_data/highlight_injection.html
@@ -42,7 +42,7 @@ pre                 { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
 <span class="keyword">fn</span> <span class="function declaration">main</span><span class="parenthesis">(</span><span class="parenthesis">)</span> <span class="brace">{</span>
     <span class="function">fixture</span><span class="parenthesis">(</span><span class="string_literal">r#"</span>
         <span class="keyword">trait</span> <span class="trait declaration">Foo</span> <span class="brace">{</span>
-            <span class="keyword">fn</span> <span class="function declaration static associated trait">foo</span><span class="parenthesis">(</span><span class="parenthesis">)</span> <span class="brace">{</span>
+            <span class="keyword">fn</span> <span class="function associated declaration static trait">foo</span><span class="parenthesis">(</span><span class="parenthesis">)</span> <span class="brace">{</span>
                 <span class="macro">println!</span><span class="parenthesis">(</span><span class="string_literal">"2 + 2 = {}"</span><span class="comma">,</span> <span class="numeric_literal">4</span><span class="parenthesis">)</span><span class="semicolon">;</span>
             <span class="brace">}</span>
         <span class="brace">}</span><span class="string_literal">"#</span>
diff --git a/crates/ide/src/syntax_highlighting/test_data/highlight_unsafe.html b/crates/ide/src/syntax_highlighting/test_data/highlight_unsafe.html
index 72910421d..68165bdbf 100644
--- a/crates/ide/src/syntax_highlighting/test_data/highlight_unsafe.html
+++ b/crates/ide/src/syntax_highlighting/test_data/highlight_unsafe.html
@@ -47,7 +47,7 @@ pre                 { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
 <span class="keyword">struct</span> <span class="struct declaration">HasUnsafeFn</span><span class="semicolon">;</span>
 
 <span class="keyword">impl</span> <span class="struct">HasUnsafeFn</span> <span class="brace">{</span>
-    <span class="keyword unsafe">unsafe</span> <span class="keyword">fn</span> <span class="function declaration associated unsafe">unsafe_method</span><span class="parenthesis">(</span><span class="operator">&</span><span class="self_keyword declaration">self</span><span class="parenthesis">)</span> <span class="brace">{</span><span class="brace">}</span>
+    <span class="keyword unsafe">unsafe</span> <span class="keyword">fn</span> <span class="function associated declaration unsafe">unsafe_method</span><span class="parenthesis">(</span><span class="operator">&</span><span class="self_keyword declaration">self</span><span class="parenthesis">)</span> <span class="brace">{</span><span class="brace">}</span>
 <span class="brace">}</span>
 
 <span class="keyword">struct</span> <span class="struct declaration">TypeForStaticMut</span> <span class="brace">{</span>
@@ -62,11 +62,11 @@ pre                 { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
 <span class="brace">}</span>
 
 <span class="keyword">trait</span> <span class="trait declaration">DoTheAutoref</span> <span class="brace">{</span>
-    <span class="keyword">fn</span> <span class="function declaration associated trait">calls_autoref</span><span class="parenthesis">(</span><span class="operator">&</span><span class="self_keyword declaration">self</span><span class="parenthesis">)</span><span class="semicolon">;</span>
+    <span class="keyword">fn</span> <span class="function associated declaration trait">calls_autoref</span><span class="parenthesis">(</span><span class="operator">&</span><span class="self_keyword declaration">self</span><span class="parenthesis">)</span><span class="semicolon">;</span>
 <span class="brace">}</span>
 
 <span class="keyword">impl</span> <span class="trait">DoTheAutoref</span> <span class="keyword">for</span> <span class="builtin_type">u16</span> <span class="brace">{</span>
-    <span class="keyword">fn</span> <span class="function declaration associated trait">calls_autoref</span><span class="parenthesis">(</span><span class="operator">&</span><span class="self_keyword declaration">self</span><span class="parenthesis">)</span> <span class="brace">{</span><span class="brace">}</span>
+    <span class="keyword">fn</span> <span class="function associated declaration trait">calls_autoref</span><span class="parenthesis">(</span><span class="operator">&</span><span class="self_keyword declaration">self</span><span class="parenthesis">)</span> <span class="brace">{</span><span class="brace">}</span>
 <span class="brace">}</span>
 
 <span class="keyword">fn</span> <span class="function declaration">main</span><span class="parenthesis">(</span><span class="parenthesis">)</span> <span class="brace">{</span>
diff --git a/crates/ide/src/syntax_highlighting/test_data/highlighting.html b/crates/ide/src/syntax_highlighting/test_data/highlighting.html
index c43bcb691..df4192194 100644
--- a/crates/ide/src/syntax_highlighting/test_data/highlighting.html
+++ b/crates/ide/src/syntax_highlighting/test_data/highlighting.html
@@ -67,25 +67,25 @@ pre                 { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
 <span class="brace">}</span>
 
 <span class="keyword">trait</span> <span class="trait declaration">Bar</span> <span class="brace">{</span>
-    <span class="keyword">fn</span> <span class="function declaration associated trait">bar</span><span class="parenthesis">(</span><span class="operator">&</span><span class="self_keyword declaration">self</span><span class="parenthesis">)</span> <span class="operator">-&gt;</span> <span class="builtin_type">i32</span><span class="semicolon">;</span>
+    <span class="keyword">fn</span> <span class="function associated declaration trait">bar</span><span class="parenthesis">(</span><span class="operator">&</span><span class="self_keyword declaration">self</span><span class="parenthesis">)</span> <span class="operator">-&gt;</span> <span class="builtin_type">i32</span><span class="semicolon">;</span>
 <span class="brace">}</span>
 
 <span class="keyword">impl</span> <span class="trait">Bar</span> <span class="keyword">for</span> <span class="struct">Foo</span> <span class="brace">{</span>
-    <span class="keyword">fn</span> <span class="function declaration associated trait">bar</span><span class="parenthesis">(</span><span class="operator">&</span><span class="self_keyword declaration">self</span><span class="parenthesis">)</span> <span class="operator">-&gt;</span> <span class="builtin_type">i32</span> <span class="brace">{</span>
+    <span class="keyword">fn</span> <span class="function associated declaration trait">bar</span><span class="parenthesis">(</span><span class="operator">&</span><span class="self_keyword declaration">self</span><span class="parenthesis">)</span> <span class="operator">-&gt;</span> <span class="builtin_type">i32</span> <span class="brace">{</span>
         <span class="self_keyword">self</span><span class="operator">.</span><span class="field">x</span>
     <span class="brace">}</span>
 <span class="brace">}</span>
 
 <span class="keyword">impl</span> <span class="struct">Foo</span> <span class="brace">{</span>
-    <span class="keyword">fn</span> <span class="function declaration associated">baz</span><span class="parenthesis">(</span><span class="keyword">mut</span> <span class="self_keyword declaration mutable">self</span><span class="comma">,</span> <span class="value_param declaration">f</span><span class="colon">:</span> <span class="struct">Foo</span><span class="parenthesis">)</span> <span class="operator">-&gt;</span> <span class="builtin_type">i32</span> <span class="brace">{</span>
-        <span class="value_param">f</span><span class="operator">.</span><span class="function consuming associated">baz</span><span class="parenthesis">(</span><span class="self_keyword mutable consuming">self</span><span class="parenthesis">)</span>
+    <span class="keyword">fn</span> <span class="function associated declaration">baz</span><span class="parenthesis">(</span><span class="keyword">mut</span> <span class="self_keyword declaration mutable">self</span><span class="comma">,</span> <span class="value_param declaration">f</span><span class="colon">:</span> <span class="struct">Foo</span><span class="parenthesis">)</span> <span class="operator">-&gt;</span> <span class="builtin_type">i32</span> <span class="brace">{</span>
+        <span class="value_param">f</span><span class="operator">.</span><span class="function associated consuming">baz</span><span class="parenthesis">(</span><span class="self_keyword consuming mutable">self</span><span class="parenthesis">)</span>
     <span class="brace">}</span>
 
-    <span class="keyword">fn</span> <span class="function declaration associated">qux</span><span class="parenthesis">(</span><span class="operator">&</span><span class="keyword">mut</span> <span class="self_keyword declaration mutable">self</span><span class="parenthesis">)</span> <span class="brace">{</span>
+    <span class="keyword">fn</span> <span class="function associated declaration mutable">qux</span><span class="parenthesis">(</span><span class="operator">&</span><span class="keyword">mut</span> <span class="self_keyword declaration mutable">self</span><span class="parenthesis">)</span> <span class="brace">{</span>
         <span class="self_keyword mutable">self</span><span class="operator">.</span><span class="field">x</span> <span class="operator">=</span> <span class="numeric_literal">0</span><span class="semicolon">;</span>
     <span class="brace">}</span>
 
-    <span class="keyword">fn</span> <span class="function declaration associated">quop</span><span class="parenthesis">(</span><span class="operator">&</span><span class="self_keyword declaration">self</span><span class="parenthesis">)</span> <span class="operator">-&gt;</span> <span class="builtin_type">i32</span> <span class="brace">{</span>
+    <span class="keyword">fn</span> <span class="function associated declaration">quop</span><span class="parenthesis">(</span><span class="operator">&</span><span class="self_keyword declaration">self</span><span class="parenthesis">)</span> <span class="operator">-&gt;</span> <span class="builtin_type">i32</span> <span class="brace">{</span>
         <span class="self_keyword">self</span><span class="operator">.</span><span class="field">x</span>
     <span class="brace">}</span>
 <span class="brace">}</span>
@@ -96,15 +96,15 @@ pre                 { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
 <span class="brace">}</span>
 
 <span class="keyword">impl</span> <span class="struct">FooCopy</span> <span class="brace">{</span>
-    <span class="keyword">fn</span> <span class="function declaration associated">baz</span><span class="parenthesis">(</span><span class="self_keyword declaration">self</span><span class="comma">,</span> <span class="value_param declaration">f</span><span class="colon">:</span> <span class="struct">FooCopy</span><span class="parenthesis">)</span> <span class="operator">-&gt;</span> <span class="builtin_type">u32</span> <span class="brace">{</span>
+    <span class="keyword">fn</span> <span class="function associated declaration">baz</span><span class="parenthesis">(</span><span class="self_keyword declaration">self</span><span class="comma">,</span> <span class="value_param declaration">f</span><span class="colon">:</span> <span class="struct">FooCopy</span><span class="parenthesis">)</span> <span class="operator">-&gt;</span> <span class="builtin_type">u32</span> <span class="brace">{</span>
         <span class="value_param">f</span><span class="operator">.</span><span class="function associated">baz</span><span class="parenthesis">(</span><span class="self_keyword">self</span><span class="parenthesis">)</span>
     <span class="brace">}</span>
 
-    <span class="keyword">fn</span> <span class="function declaration associated">qux</span><span class="parenthesis">(</span><span class="operator">&</span><span class="keyword">mut</span> <span class="self_keyword declaration mutable">self</span><span class="parenthesis">)</span> <span class="brace">{</span>
+    <span class="keyword">fn</span> <span class="function associated declaration mutable">qux</span><span class="parenthesis">(</span><span class="operator">&</span><span class="keyword">mut</span> <span class="self_keyword declaration mutable">self</span><span class="parenthesis">)</span> <span class="brace">{</span>
         <span class="self_keyword mutable">self</span><span class="operator">.</span><span class="field">x</span> <span class="operator">=</span> <span class="numeric_literal">0</span><span class="semicolon">;</span>
     <span class="brace">}</span>
 
-    <span class="keyword">fn</span> <span class="function declaration associated">quop</span><span class="parenthesis">(</span><span class="operator">&</span><span class="self_keyword declaration">self</span><span class="parenthesis">)</span> <span class="operator">-&gt;</span> <span class="builtin_type">u32</span> <span class="brace">{</span>
+    <span class="keyword">fn</span> <span class="function associated declaration">quop</span><span class="parenthesis">(</span><span class="operator">&</span><span class="self_keyword declaration">self</span><span class="parenthesis">)</span> <span class="operator">-&gt;</span> <span class="builtin_type">u32</span> <span class="brace">{</span>
         <span class="self_keyword">self</span><span class="operator">.</span><span class="field">x</span>
     <span class="brace">}</span>
 <span class="brace">}</span>
@@ -128,7 +128,7 @@ pre                 { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
 <span class="brace">}</span>
 
 <span class="keyword">use</span> <span class="module">ops</span><span class="operator">::</span><span class="trait">Fn</span><span class="semicolon">;</span>
-<span class="keyword">fn</span> <span class="function declaration">baz</span><span class="angle">&lt;</span><span class="type_param declaration">F</span><span class="colon">:</span> <span class="trait">Fn</span><span class="parenthesis">(</span><span class="parenthesis">)</span> <span class="operator">-&gt;</span> <span class="parenthesis">(</span><span class="parenthesis">)</span><span class="angle">&gt;</span><span class="parenthesis">(</span><span class="value_param declaration callable">f</span><span class="colon">:</span> <span class="type_param">F</span><span class="parenthesis">)</span> <span class="brace">{</span>
+<span class="keyword">fn</span> <span class="function declaration">baz</span><span class="angle">&lt;</span><span class="type_param declaration">F</span><span class="colon">:</span> <span class="trait">Fn</span><span class="parenthesis">(</span><span class="parenthesis">)</span> <span class="operator">-&gt;</span> <span class="parenthesis">(</span><span class="parenthesis">)</span><span class="angle">&gt;</span><span class="parenthesis">(</span><span class="value_param callable declaration">f</span><span class="colon">:</span> <span class="type_param">F</span><span class="parenthesis">)</span> <span class="brace">{</span>
     <span class="value_param callable">f</span><span class="parenthesis">(</span><span class="parenthesis">)</span>
 <span class="brace">}</span>
 
@@ -199,16 +199,16 @@ pre                 { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
     <span class="keyword">let</span> <span class="keyword">mut</span> <span class="variable declaration mutable">foo</span> <span class="operator">=</span> <span class="struct">Foo</span> <span class="brace">{</span> <span class="field">x</span><span class="comma">,</span> <span class="field">y</span><span class="colon">:</span> <span class="variable mutable">x</span> <span class="brace">}</span><span class="semicolon">;</span>
     <span class="keyword">let</span> <span class="variable declaration">foo2</span> <span class="operator">=</span> <span class="struct">Foo</span> <span class="brace">{</span> <span class="field">x</span><span class="comma">,</span> <span class="field">y</span><span class="colon">:</span> <span class="variable mutable">x</span> <span class="brace">}</span><span class="semicolon">;</span>
     <span class="variable mutable">foo</span><span class="operator">.</span><span class="function associated">quop</span><span class="parenthesis">(</span><span class="parenthesis">)</span><span class="semicolon">;</span>
-    <span class="variable mutable">foo</span><span class="operator">.</span><span class="function mutable associated">qux</span><span class="parenthesis">(</span><span class="parenthesis">)</span><span class="semicolon">;</span>
-    <span class="variable mutable">foo</span><span class="operator">.</span><span class="function consuming associated">baz</span><span class="parenthesis">(</span><span class="variable consuming">foo2</span><span class="parenthesis">)</span><span class="semicolon">;</span>
+    <span class="variable mutable">foo</span><span class="operator">.</span><span class="function associated mutable">qux</span><span class="parenthesis">(</span><span class="parenthesis">)</span><span class="semicolon">;</span>
+    <span class="variable mutable">foo</span><span class="operator">.</span><span class="function associated consuming">baz</span><span class="parenthesis">(</span><span class="variable consuming">foo2</span><span class="parenthesis">)</span><span class="semicolon">;</span>
 
     <span class="keyword">let</span> <span class="keyword">mut</span> <span class="variable declaration mutable">copy</span> <span class="operator">=</span> <span class="struct">FooCopy</span> <span class="brace">{</span> <span class="field">x</span> <span class="brace">}</span><span class="semicolon">;</span>
     <span class="variable mutable">copy</span><span class="operator">.</span><span class="function associated">quop</span><span class="parenthesis">(</span><span class="parenthesis">)</span><span class="semicolon">;</span>
-    <span class="variable mutable">copy</span><span class="operator">.</span><span class="function mutable associated">qux</span><span class="parenthesis">(</span><span class="parenthesis">)</span><span class="semicolon">;</span>
+    <span class="variable mutable">copy</span><span class="operator">.</span><span class="function associated mutable">qux</span><span class="parenthesis">(</span><span class="parenthesis">)</span><span class="semicolon">;</span>
     <span class="variable mutable">copy</span><span class="operator">.</span><span class="function associated">baz</span><span class="parenthesis">(</span><span class="variable mutable">copy</span><span class="parenthesis">)</span><span class="semicolon">;</span>
 
-    <span class="keyword">let</span> <span class="variable declaration callable">a</span> <span class="operator">=</span> <span class="punctuation">|</span><span class="value_param declaration">x</span><span class="punctuation">|</span> <span class="value_param">x</span><span class="semicolon">;</span>
-    <span class="keyword">let</span> <span class="variable declaration callable">bar</span> <span class="operator">=</span> <span class="struct">Foo</span><span class="operator">::</span><span class="function associated">baz</span><span class="semicolon">;</span>
+    <span class="keyword">let</span> <span class="variable callable declaration">a</span> <span class="operator">=</span> <span class="punctuation">|</span><span class="value_param declaration">x</span><span class="punctuation">|</span> <span class="value_param">x</span><span class="semicolon">;</span>
+    <span class="keyword">let</span> <span class="variable callable declaration">bar</span> <span class="operator">=</span> <span class="struct">Foo</span><span class="operator">::</span><span class="function associated">baz</span><span class="semicolon">;</span>
 
     <span class="keyword">let</span> <span class="variable declaration">baz</span> <span class="operator">=</span> <span class="numeric_literal">-</span><span class="numeric_literal">42</span><span class="semicolon">;</span>
     <span class="keyword">let</span> <span class="variable declaration">baz</span> <span class="operator">=</span> <span class="operator">-</span><span class="variable">baz</span><span class="semicolon">;</span>
@@ -228,7 +228,7 @@ pre                 { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
 <span class="keyword">use</span> <span class="enum">Option</span><span class="operator">::</span><span class="punctuation">*</span><span class="semicolon">;</span>
 
 <span class="keyword">impl</span><span class="angle">&lt;</span><span class="type_param declaration">T</span><span class="angle">&gt;</span> <span class="enum">Option</span><span class="angle">&lt;</span><span class="type_param">T</span><span class="angle">&gt;</span> <span class="brace">{</span>
-    <span class="keyword">fn</span> <span class="function declaration associated">and</span><span class="angle">&lt;</span><span class="type_param declaration">U</span><span class="angle">&gt;</span><span class="parenthesis">(</span><span class="self_keyword declaration">self</span><span class="comma">,</span> <span class="value_param declaration">other</span><span class="colon">:</span> <span class="enum">Option</span><span class="angle">&lt;</span><span class="type_param">U</span><span class="angle">&gt;</span><span class="parenthesis">)</span> <span class="operator">-&gt;</span> <span class="enum">Option</span><span class="angle">&lt;</span><span class="parenthesis">(</span><span class="type_param">T</span><span class="comma">,</span> <span class="type_param">U</span><span class="parenthesis">)</span><span class="angle">&gt;</span> <span class="brace">{</span>
+    <span class="keyword">fn</span> <span class="function associated declaration">and</span><span class="angle">&lt;</span><span class="type_param declaration">U</span><span class="angle">&gt;</span><span class="parenthesis">(</span><span class="self_keyword declaration">self</span><span class="comma">,</span> <span class="value_param declaration">other</span><span class="colon">:</span> <span class="enum">Option</span><span class="angle">&lt;</span><span class="type_param">U</span><span class="angle">&gt;</span><span class="parenthesis">)</span> <span class="operator">-&gt;</span> <span class="enum">Option</span><span class="angle">&lt;</span><span class="parenthesis">(</span><span class="type_param">T</span><span class="comma">,</span> <span class="type_param">U</span><span class="parenthesis">)</span><span class="angle">&gt;</span> <span class="brace">{</span>
         <span class="keyword control">match</span> <span class="value_param">other</span> <span class="brace">{</span>
             <span class="enum_variant">None</span> <span class="operator">=&gt;</span> <span class="macro">unimplemented!</span><span class="parenthesis">(</span><span class="parenthesis">)</span><span class="comma">,</span>
             <span class="variable declaration">Nope</span> <span class="operator">=&gt;</span> <span class="variable">Nope</span><span class="comma">,</span>