Fix #135: Idnetify package names in extension clause

Author: nicolasstucki

package.json

@@ -2,7 +2,7 @@
     "name": "scala",
     "displayName": "Scala Syntax (official)",
     "description": "Official Scala Syntax",
-    "version": "0.4.1",
+    "version": "0.4.2",
     "publisher": "scala-lang",
     "license": "SEE LICENSE IN LICENSE.md",
     "engines": {

src/typescript/Scala.tmLanguage.ts

@@ -992,7 +992,7 @@ export const scalaTmLanguage: TmLanguage = {
     inheritance: {
       patterns: [
         {
-          match: `(extends|with|derives)\\s+(${plainid}|${backQuotedId}|(?=\\([^\\)]+=>)|(?="))`,
+          match: `(extends|with|derives)\\s+(${idUpper}|${backQuotedId}|(?=\\([^\\)]+=>)|(?=${plainid})|(?="))`,
           captures: {
             '1': {
               name: 'keyword.declaration.scala'

tests/unit/#135.test.scala

@@ -0,0 +1,12 @@
+// SYNTAX TEST "source.scala"
+
+    class Foo extends scala.collection.Seq[Int]
+//  ^^^^^  keyword.declaration.scala
+//        ^^^  entity.name.class.declaration
+//            ^^^^^^^  keyword.declaration.scala
+//                    ^^^^^  source.scala
+//                          ^^^^^^^^^^  source.scala
+//                                     ^^^  entity.name.class
+//                                        ^  meta.bracket.scala
+//                                         ^^^  entity.name.class
+//                                            ^  meta.bracket.scala