[CursorInfo] UID for opaque result type.

rdar://problem/49819227

Author: rintaro

include/swift/AST/PrintOptions.h

@@ -574,6 +574,7 @@ struct PrintOptions {
     PO.ExplodeEnumCaseDecls = true;
     PO.ShouldQualifyNestedDeclarations = QualifyNestedDeclarations::TypesOnly;
     PO.PrintParameterSpecifiers = true;
+    PO.SkipImplicit = true;
     return PO;
   }
 };

tools/SourceKit/lib/SwiftLang/SwiftLangSupport.cpp

@@ -117,6 +117,7 @@ class UIdentVisitor : public ASTVisitor<UIdentVisitor,
   UID_FOR(Constructor)
   UID_FOR(Destructor)
   UID_FOR(Subscript)
+  UID_FOR(OpaqueType)
 #undef UID_FOR
 };
 

utils/gyb_sourcekit_support/UIDs.py

@@ -322,6 +322,8 @@ def __init__(self, internal_name, external_name):
     KIND('DeclExtensionProtocol', 'source.lang.swift.decl.extension.protocol'),
     KIND('DeclAssociatedType', 'source.lang.swift.decl.associatedtype'),
     KIND('RefAssociatedType', 'source.lang.swift.ref.associatedtype'),
+    KIND('DeclOpaqueType', 'source.lang.swift.decl.opaquetype'),
+    KIND('RefOpaqueType', 'source.lang.swift.ref.opaquetype'),
     KIND('DeclTypeAlias', 'source.lang.swift.decl.typealias'),
     KIND('RefTypeAlias', 'source.lang.swift.ref.typealias'),
     KIND('DeclGenericTypeParam', 'source.lang.swift.decl.generic_type_param'),