Fix #140: Identify nameless given declarations

Author: nicolasstucki

src/typescript/Scala.tmLanguage.ts

@@ -708,7 +708,7 @@ export const scalaTmLanguage: TmLanguage = {
           name: 'meta.package.scala'
         },
         {
-          match: `\\b(given)\\b\\s*(?:\\b(as)\\b|(${idUpper})|(${backQuotedId}|(?!//|/\\*)${plainid})?)`,
+          match: `\\b(given)\\b\\s*(?:\\b(as)\\b|(${idUpper})(?=.+\\bas\\b)|(${backQuotedId}(?=.+\\bas\\b)|(?!//|/\\*)${plainid}(?=.+\\bas\\b))?)`,
           captures: {
             '1': { name: 'keyword.declaration.scala' },
             '2': { name: 'keyword.declaration.scala' },

tests/unit/#140.test.scala

@@ -0,0 +1,11 @@
+// SYNTAX TEST "source.scala"
+
+   given foo.Foo
+// ^^^^^ keyword.declaration.scala
+//       ^^^ - entity.name.declaration
+//           ^^^ entity.name.class
+
+   given Foo[a]
+// ^^^^^ keyword.declaration.scala
+//       ^^^ - entity.name.type.declaration
+//       ^^^ entity.name.class

tests/unit/given.test.scala

@@ -3,11 +3,11 @@
 
     given Foo = ???
 //  ^^^^^ keyword.declaration.scala
-//        ^^^ entity.name.type.declaration
+//        ^^^ - entity.name.type.declaration
 
     given foo = ???
 //  ^^^^^ keyword.declaration.scala
-//        ^^^ entity.name.declaration
+//        ^^^ - entity.name.declaration
 
     given as Foo = ???
 //  ^^^^^ keyword.declaration.scala