Implement enum members

Author: dkiszkiel

Sources/SourceKit/sourcekitd/SwiftLanguageServer.swift

@@ -496,7 +496,6 @@ extension SwiftLanguageServer {
 
       /// Translate sourcekit symbol kinds into LSP kinds.
       func symbolKind(sourcekitSymbolKind: sourcekitd_uid_t) -> SymbolKind? {
-        // TODO: Implement .enumMember
         switch sourcekitSymbolKind {
           case self.values.decl_class:
             return .class
@@ -507,6 +506,8 @@ extension SwiftLanguageServer {
             return .property
           case self.values.decl_enum:
             return .enum
+          case self.values.decl_enumelement:
+            return .enumMember
           case self.values.decl_protocol:
             return .interface
           case self.values.decl_function_free:
@@ -548,14 +549,7 @@ extension SwiftLanguageServer {
 
         let children: [DocumentSymbol]?
         if let substructure: SKResponseArray = value[self.keys.substructure] {
-          var childrenArray: [DocumentSymbol] = []
-          childrenArray.reserveCapacity(substructure.count)
-          substructure.forEach { i, value in
-            guard let symbol = documentSymbol(value: value) else { return true }
-            childrenArray.append(symbol)
-            return true
-          }
-          children = childrenArray
+          children = documentSymbols(array: substructure)
         } else {
           children = nil
         }
@@ -570,14 +564,20 @@ extension SwiftLanguageServer {
         )
       }
 
-      var result: [DocumentSymbol] = []
-      results.forEach { (i: Int, value: SKResponseDictionary) in
-        if let documentSymbol = documentSymbol(value: value) {
-          result.append(documentSymbol)
-        }    
-        return true
+      func documentSymbols(array: SKResponseArray) -> [DocumentSymbol] {
+        var result: [DocumentSymbol] = []
+        array.forEach { (i: Int, value: SKResponseDictionary) in
+          if let documentSymbol = documentSymbol(value: value) {
+            result.append(documentSymbol)
+          } else if let substructure: SKResponseArray = value[self.keys.substructure] {
+            result += documentSymbols(array: substructure)
+          }
+          return true
+        }
+        return result
       }
-      req.reply(result)
+      
+      req.reply(documentSymbols(array: results))
     }
     // FIXME: cancellation
     _ = handle