Fix #119: Detect when using is an identifier

Author: nicolasstucki

src/typescript/Scala.tmLanguage.ts

@@ -404,7 +404,7 @@ export const scalaTmLanguage: TmLanguage = {
     'using': {
       patterns: [
         {
-          match: `\\(\\s*(using)`,
+          match: `(?<=\\()\\s*(using)\\s(?=\\s*(?:[\\w\\d\\(\\.]))`,
           captures: {
             '1': {
               name: 'keyword.declaration.scala'

tests/unit/#119.test.scala

@@ -0,0 +1,21 @@
+// SYNTAX TEST "source.scala"
+
+   (using)
+// ^ meta.bracket.scala
+//  ^^^^^ source.scala
+//       ^ meta.bracket.scala
+   
+   (using  )
+// ^ meta.bracket.scala
+//  ^^^^^^^ source.scala
+//         ^ meta.bracket.scala
+
+   (using , )
+// ^ meta.bracket.scala
+//  ^^^^^^^^ source.scala
+//          ^ meta.bracket.scala
+
+   (usingSomething)
+// ^ meta.bracket.scala
+//  ^^^^^^^^^^^^^^ source.scala
+//                ^ meta.bracket.scala