[CodeCompletion] Annotated result type

Introduced 'TypeAnnotationBegin' chunk kind for grouping the result type
name chunks.

rdar://problem/62617558

Author: rintaro

include/swift/IDE/CodeCompletion.h

@@ -182,6 +182,10 @@ class CodeCompletionStringChunk {
     /// This chunk should not be inserted into the editor buffer.
     TypeAnnotation,
 
+    /// Structured group version of 'TypeAnnotation'.
+    /// This grouped chunks should not be inserted into the editor buffer.
+    TypeAnnotationBegin,
+
     /// A brace statement -- left brace and right brace.  The preferred
     /// position to put the cursor after the completion result is inserted
     /// into the editor buffer is between the braces.
@@ -195,7 +199,8 @@ class CodeCompletionStringChunk {
     return Kind == ChunkKind::CallParameterBegin ||
            Kind == ChunkKind::GenericParameterBegin ||
            Kind == ChunkKind::OptionalBegin ||
-           Kind == ChunkKind::CallParameterTypeBegin;
+           Kind == ChunkKind::CallParameterTypeBegin ||
+           Kind == ChunkKind::TypeAnnotationBegin;
   }
 
   static bool chunkHasText(ChunkKind Kind) {

include/swift/IDE/CodeCompletionResultPrinter.h

@@ -27,6 +27,13 @@ void printCodeCompletionResultDescription(const CodeCompletionResult &Result,
 void printCodeCompletionResultDescriptionAnnotated(
     const CodeCompletionResult &Result, llvm::raw_ostream &OS,
     bool leadingPunctuation);
+
+void printCodeCompletionResultTypeName(
+    const CodeCompletionResult &Result, llvm::raw_ostream &OS);
+
+void printCodeCompletionResultTypeNameAnnotated(
+    const CodeCompletionResult &Result, llvm::raw_ostream &OS);
+
 } // namespace ide
 } // namespace swift