Add self keyword semantic token type

crates/ra_ide/src/snapshots/highlighting.html

@@ -35,12 +35,12 @@ pre                 { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
 }
 
 <span class="keyword">trait</span> <span class="trait declaration">Bar</span> {
-    <span class="keyword">fn</span> <span class="function declaration">bar</span>(&<span class="keyword">self</span>) -&gt; <span class="builtin_type">i32</span>;
+    <span class="keyword">fn</span> <span class="function declaration">bar</span>(&<span class="self_keyword">self</span>) -&gt; <span class="builtin_type">i32</span>;
 }
 
 <span class="keyword">impl</span> <span class="trait">Bar</span> <span class="keyword">for</span> <span class="struct">Foo</span> {
-    <span class="keyword">fn</span> <span class="function declaration">bar</span>(&<span class="keyword">self</span>) -&gt; <span class="builtin_type">i32</span> {
+    <span class="keyword">fn</span> <span class="function declaration">bar</span>(&<span class="self_keyword">self</span>) -&gt; <span class="builtin_type">i32</span> {
-        <span class="keyword">self</span>.<span class="field">x</span>
+        <span class="self_keyword">self</span>.<span class="field">x</span>
     }
 }
 
@@ -92,7 +92,7 @@ pre                 { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
 <span class="keyword">use</span> <span class="enum">Option</span>::*;
 
 <span class="keyword">impl</span>&lt;<span class="type_param declaration">T</span>&gt; <span class="enum">Option</span>&lt;<span class="type_param">T</span>&gt; {
-    <span class="keyword">fn</span> <span class="function declaration">and</span>&lt;<span class="type_param declaration">U</span>&gt;(<span class="keyword">self</span>, <span class="variable declaration">other</span>: <span class="enum">Option</span>&lt;<span class="type_param">U</span>&gt;) -&gt; <span class="enum">Option</span>&lt;(<span class="type_param">T</span>, <span class="type_param">U</span>)&gt; {
+    <span class="keyword">fn</span> <span class="function declaration">and</span>&lt;<span class="type_param declaration">U</span>&gt;(<span class="self_keyword">self</span>, <span class="variable declaration">other</span>: <span class="enum">Option</span>&lt;<span class="type_param">U</span>&gt;) -&gt; <span class="enum">Option</span>&lt;(<span class="type_param">T</span>, <span class="type_param">U</span>)&gt; {
         <span class="keyword control">match</span> <span class="variable">other</span> {
             <span class="enum_variant">None</span> =&gt; <span class="macro">unimplemented!</span>(),
             <span class="variable declaration">Nope</span> =&gt; <span class="variable">Nope</span>,

crates/ra_ide/src/syntax_highlighting.rs

@@ -414,6 +414,7 @@ fn highlight_element(
                 T![for] if !is_child_of_impl(element) => h | HighlightModifier::ControlFlow,
                 T![unsafe] => h | HighlightModifier::Unsafe,
                 T![true] | T![false] => HighlightTag::BoolLiteral.into(),
+                T![self] => HighlightTag::SelfKeyword.into(),
                 _ => h,
             }
         }

crates/ra_ide/src/syntax_highlighting/tags.rs

@@ -30,6 +30,7 @@ pub enum HighlightTag {
     Macro,
     Module,
     NumericLiteral,
+    SelfKeyword,
     SelfType,
     Static,
     StringLiteral,
@@ -76,6 +77,7 @@ impl HighlightTag {
             HighlightTag::Macro => "macro",
             HighlightTag::Module => "module",
             HighlightTag::NumericLiteral => "numeric_literal",
+            HighlightTag::SelfKeyword => "self_keyword",
             HighlightTag::SelfType => "self_type",
             HighlightTag::Static => "static",
             HighlightTag::StringLiteral => "string_literal",

crates/rust-analyzer/src/semantic_tokens.rs

@@ -40,6 +40,7 @@ define_semantic_token_types![
     (BUILTIN_TYPE, "builtinType"),
     (ENUM_MEMBER, "enumMember"),
     (LIFETIME, "lifetime"),
+    (SELF_KEYWORD, "selfKeyword"),
     (TYPE_ALIAS, "typeAlias"),
     (UNION, "union"),
     (UNRESOLVED_REFERENCE, "unresolvedReference"),

crates/rust-analyzer/src/to_proto.rs

@@ -274,6 +274,7 @@ fn semantic_token_type_and_modifiers(
         HighlightTag::TypeAlias => semantic_tokens::TYPE_ALIAS,
         HighlightTag::Trait => lsp_types::SemanticTokenType::INTERFACE,
         HighlightTag::BuiltinType => semantic_tokens::BUILTIN_TYPE,
+        HighlightTag::SelfKeyword => semantic_tokens::SELF_KEYWORD,
         HighlightTag::SelfType => lsp_types::SemanticTokenType::TYPE,
         HighlightTag::Field => lsp_types::SemanticTokenType::PROPERTY,
         HighlightTag::Function => lsp_types::SemanticTokenType::FUNCTION,

editors/code/package.json

@@ -595,6 +595,11 @@
                 "id": "lifetime",
                 "description": "Style for lifetimes"
             },
+            {
+                "id": "selfKeyword",
+                "description": "Style for the self keyword",
+                "superType": "keyword"
+            },
             {
                 "id": "typeAlias",
                 "description": "Style for type aliases",