Adds highlighting for the 'accessor' keyword (#917)

Co-authored-by: Sheetal Nandi <shkamat@microsoft.com>

TypeScript.YAML-tmLanguage

@@ -1004,7 +1004,7 @@ repository:
 
   property-accessor:
     name: storage.type.property.ts
-    match: '{{startOfIdentifier}}(get|set){{endOfIdentifier}}'
+    match: '{{startOfIdentifier}}(accessor|get|set){{endOfIdentifier}}'
 
   async-modifier:
     name: storage.modifier.async.ts

TypeScript.tmLanguage

@@ -3173,7 +3173,7 @@
         <key>name</key>
         <string>storage.type.property.ts</string>
         <key>match</key>
-        <string>(?&lt;![_$[:alnum:]])(?:(?&lt;=\.\.\.)|(?&lt;!\.))(get|set)(?![_$[:alnum:]])(?:(?=\.\.\.)|(?!\.))</string>
+        <string>(?&lt;![_$[:alnum:]])(?:(?&lt;=\.\.\.)|(?&lt;!\.))(accessor|get|set)(?![_$[:alnum:]])(?:(?=\.\.\.)|(?!\.))</string>
       </dict>
       <key>async-modifier</key>
       <dict>

TypeScriptReact.tmLanguage

@@ -3195,7 +3195,7 @@
         <key>name</key>
         <string>storage.type.property.tsx</string>
         <key>match</key>
-        <string>(?&lt;![_$[:alnum:]])(?:(?&lt;=\.\.\.)|(?&lt;!\.))(get|set)(?![_$[:alnum:]])(?:(?=\.\.\.)|(?!\.))</string>
+        <string>(?&lt;![_$[:alnum:]])(?:(?&lt;=\.\.\.)|(?&lt;!\.))(accessor|get|set)(?![_$[:alnum:]])(?:(?=\.\.\.)|(?!\.))</string>
       </dict>
       <key>async-modifier</key>
       <dict>

tests/baselines/autoAccessor.baseline.txt

@@ -0,0 +1,110 @@
+original file
+-----------------------------------
+class C {
+    accessor a: number;
+    accessor b = 1;
+    abstract accessor c: number;
+    static accessor d = 1;
+}
+
+-----------------------------------
+
+Grammar: TypeScript.tmLanguage
+-----------------------------------
+>class C {
+ ^^^^^
+ source.ts meta.class.ts storage.type.class.ts
+      ^
+      source.ts meta.class.ts
+       ^
+       source.ts meta.class.ts entity.name.type.class.ts
+        ^
+        source.ts meta.class.ts
+         ^
+         source.ts meta.class.ts punctuation.definition.block.ts
+>    accessor a: number;
+ ^^^^
+ source.ts meta.class.ts
+     ^^^^^^^^
+     source.ts meta.class.ts storage.type.property.ts
+             ^
+             source.ts meta.class.ts meta.field.declaration.ts
+              ^
+              source.ts meta.class.ts meta.field.declaration.ts meta.definition.property.ts variable.object.property.ts
+               ^
+               source.ts meta.class.ts meta.field.declaration.ts meta.type.annotation.ts keyword.operator.type.annotation.ts
+                ^
+                source.ts meta.class.ts meta.field.declaration.ts meta.type.annotation.ts
+                 ^^^^^^
+                 source.ts meta.class.ts meta.field.declaration.ts meta.type.annotation.ts support.type.primitive.ts
+                       ^
+                       source.ts meta.class.ts punctuation.terminator.statement.ts
+>    accessor b = 1;
+ ^^^^
+ source.ts meta.class.ts
+     ^^^^^^^^
+     source.ts meta.class.ts storage.type.property.ts
+             ^
+             source.ts meta.class.ts meta.field.declaration.ts
+              ^
+              source.ts meta.class.ts meta.field.declaration.ts meta.definition.property.ts variable.object.property.ts
+               ^
+               source.ts meta.class.ts meta.field.declaration.ts
+                ^
+                source.ts meta.class.ts meta.field.declaration.ts keyword.operator.assignment.ts
+                 ^
+                 source.ts meta.class.ts meta.field.declaration.ts
+                  ^
+                  source.ts meta.class.ts meta.field.declaration.ts constant.numeric.decimal.ts
+                   ^
+                   source.ts meta.class.ts punctuation.terminator.statement.ts
+>    abstract accessor c: number;
+ ^^^^
+ source.ts meta.class.ts
+     ^^^^^^^^
+     source.ts meta.class.ts storage.modifier.ts
+             ^
+             source.ts meta.class.ts
+              ^^^^^^^^
+              source.ts meta.class.ts storage.type.property.ts
+                      ^
+                      source.ts meta.class.ts meta.field.declaration.ts
+                       ^
+                       source.ts meta.class.ts meta.field.declaration.ts meta.definition.property.ts variable.object.property.ts
+                        ^
+                        source.ts meta.class.ts meta.field.declaration.ts meta.type.annotation.ts keyword.operator.type.annotation.ts
+                         ^
+                         source.ts meta.class.ts meta.field.declaration.ts meta.type.annotation.ts
+                          ^^^^^^
+                          source.ts meta.class.ts meta.field.declaration.ts meta.type.annotation.ts support.type.primitive.ts
+                                ^
+                                source.ts meta.class.ts punctuation.terminator.statement.ts
+>    static accessor d = 1;
+ ^^^^
+ source.ts meta.class.ts
+     ^^^^^^
+     source.ts meta.class.ts storage.modifier.ts
+           ^
+           source.ts meta.class.ts
+            ^^^^^^^^
+            source.ts meta.class.ts storage.type.property.ts
+                    ^
+                    source.ts meta.class.ts meta.field.declaration.ts
+                     ^
+                     source.ts meta.class.ts meta.field.declaration.ts meta.definition.property.ts variable.object.property.ts
+                      ^
+                      source.ts meta.class.ts meta.field.declaration.ts
+                       ^
+                       source.ts meta.class.ts meta.field.declaration.ts keyword.operator.assignment.ts
+                        ^
+                        source.ts meta.class.ts meta.field.declaration.ts
+                         ^
+                         source.ts meta.class.ts meta.field.declaration.ts constant.numeric.decimal.ts
+                          ^
+                          source.ts meta.class.ts punctuation.terminator.statement.ts
+>}
+ ^
+ source.ts meta.class.ts punctuation.definition.block.ts
+>
+ ^
+ source.ts

tests/cases/autoAccessor.ts

@@ -0,0 +1,6 @@
+class C {
+    accessor a: number;
+    accessor b = 1;
+    abstract accessor c: number;
+    static accessor d = 1;
+}