[SourceKit] Add Effective Scope to Index

Author: rockbruno

test/SourceKit/Indexing/index_effective_access_level.swift

@@ -0,0 +1,71 @@
+// RUN: %sourcekitd-test -req=index %s -- -Xfrontend -serialize-diagnostics-path -Xfrontend %t.dia %s | %sed_clean > %t.response
+// RUN: %diff -u %s.response %t.response
+
+public enum PublicEn {
+    case a
+    case b
+}
+
+enum InternalEn {
+    case a
+    case b
+}
+
+fileprivate enum FilePrivateEn {
+    case a
+    case b
+}
+
+private enum PrivateEn {
+    case a
+    case b
+}
+
+extension PublicEn {
+    public func puFoo() {}
+}
+
+public extension PublicEn {
+    func puFooFromPublicExtension() {}
+}
+
+extension InternalEn {
+    func foo() {}
+}
+
+extension FilePrivateEn {
+    fileprivate func flPrFoo() {}
+}
+
+fileprivate extension FilePrivateEn {
+    func flPrFooFromFilePrivateExtension() {}
+}
+
+extension PrivateEn {
+    private func prFoo() {}
+}
+
+private extension PrivateEn {
+    func prFooFromPrivateExtension() {}
+}
+
+private struct ScopeReducerStruct {
+    public func a() {}
+    func b() {}
+    fileprivate func c() {}
+    private func d() {}
+}
+
+public struct ScopeKeeperStruct {
+    public func a() {}
+    func b() {}
+    fileprivate func c() {}
+    private func d() {}
+}
+
+struct PartialScopeReducerStruct {
+    public func a() {}
+    func b() {}
+    fileprivate func c() {}
+    private func d() {}
+}