[SourceKit][CursorInfo] Add a field for the source language the symbol was originally defined in

test/SourceKit/CursorInfo/cursor_info_source_lang.swift

@@ -0,0 +1,24 @@
+import Foo
+import Module
+
+class FromSwift {}
+@objc class StillFromSwift {}
+func test(fromObjC: FooClassDerived,
+          _: FromSwiftMod,
+          _: FromSwiftModObjC) {}
+
+// SWIFT: source.lang.swift{{$}}
+// OBJC: source.lang.objc{{$}}
+
+// REQUIRES: objc_interop
+// RUN: %empty-directory(%t)
+// RUN: echo '// swift-interface-format-version: 1.0' > %t/Module.swiftinterface
+// RUN: echo '// swift-module-flags: -swift-version 5 -enable-library-evolution -module-name Module' >> %t/Module.swiftinterface
+// RUN: echo ' public class FromSwiftMod {}' >> %t/Module.swiftinterface
+// RUN: echo ' @objc public class FromSwiftModObjC {}' >> %t/Module.swiftinterface
+
+// RUN: %sourcekitd-test -req=cursor -pos=4:7 %s -- -I %t -F %S/../Inputs/libIDE-mock-sdk %s | %FileCheck -check-prefix=SWIFT %s
+// RUN: %sourcekitd-test -req=cursor -pos=5:13 %s -- -I %t -F %S/../Inputs/libIDE-mock-sdk %s | %FileCheck -check-prefix=SWIFT %s
+// RUN: %sourcekitd-test -req=cursor -pos=6:21 %s -- -I %t -F %S/../Inputs/libIDE-mock-sdk %s | %FileCheck -check-prefix=OBJC %s
+// RUN: %sourcekitd-test -req=cursor -pos=7:14 %s -- -I %t -F %S/../Inputs/libIDE-mock-sdk %s | %FileCheck -check-prefix=SWIFT %s
+// RUN: %sourcekitd-test -req=cursor -pos=8:14 %s -- -I %t -F %S/../Inputs/libIDE-mock-sdk %s | %FileCheck -check-prefix=SWIFT %s

test/SourceKit/CursorInfo/cursor_opaque_result.swift

@@ -19,6 +19,7 @@ func test(value: MyStruct) {
 
 // OPAQUE: foo()
 // OPAQUE-NEXT: s:8MyModule0A6StructV3fooQryF
+// OPAQUE-NEXT: source.lang.swift
 // OPAQUE-NEXT: (MyStruct) -> () -> some Comparable
 // OPAQUE-NEXT: $sQrycD
 // OPAQUE-NEXT: <Container>$s8MyModule0A6StructVD</Container>
@@ -28,6 +29,7 @@ func test(value: MyStruct) {
 
 // ASSOC: bar()
 // ASSOC-NEXT: s:8MyModule1PPAAE3bar5AssocQzyF
+// ASSOC-NEXT: source.lang.swift
 // ASSOC-NEXT: <Self where Self : P> (Self) -> () -> Self.Assoc
 // ASSOC-NEXT: $s5AssocQzycD
 // ASSOC-NEXT: <Container>$s8MyModule0A6StructVD</Container>

test/SourceKit/CursorInfo/cursor_some_type.swift

@@ -23,6 +23,7 @@ func test(value: S) {
 // DECLSITE: source.lang.swift.decl.function.method.instance (13:15-13:27)
 // DECLSITE-NEXT: foo(x:)
 // DECLSITE-NEXT: s:4Test1SV3foo1xQrx_tlF
+// DECLSITE-NEXT: source.lang.swift
 // DECLSITE-NEXT: <T> (S) -> (T) -> some Base & Proto
 // DECLSITE-NEXT: $s1xQrx_tcluD
 // DECLSITE-NEXT: <Declaration>public func foo&lt;T&gt;(x: <Type usr=[[T_USR:.*]]>T</Type>) -&gt; some <Type usr=[[Base_USR:.*]]>Base</Type> &amp; <Type usr=[[Proto_USR:.*]]>Proto</Type></Declaration>
@@ -32,6 +33,7 @@ func test(value: S) {
 // PROTO_AFTER_SOME: source.lang.swift.ref.protocol (1:17-1:22)
 // PROTO_AFTER_SOME-NEXT: Proto
 // PROTO_AFTER_SOME-NEXT: s:4Test5ProtoP
+// PROTO_AFTER_SOME-NEXT: source.lang.swift
 // PROTO_AFTER_SOME-NEXT: Proto.Protocol
 // PROTO_AFTER_SOME-NEXT: $s4Test5Proto_pmD
 // PROTO_AFTER_SOME-NEXT: <Declaration>public protocol Proto</Declaration>
@@ -41,6 +43,7 @@ func test(value: S) {
 // USESITE: source.lang.swift.ref.function.method.instance (13:15-13:27)
 // USESITE-NEXT: foo(x:)
 // USESITE-NEXT: s:4Test1SV3foo1xQrx_tlF
+// USESITE-NEXT: source.lang.swift
 // USESITE-NEXT: <T> (S) -> (T) -> some Base & Proto
 // USESITE-NEXT: $s1xQrx_tcluD
 // USESITE-NEXT: <Container>$s4Test1SVD</Container>

test/SourceKit/CursorInfo/cursor_stdlib.swift

@@ -30,6 +30,7 @@ func foo3(a: Float, b: Bool) {}
 // CHECK-OVERLAY:      source.lang.swift.ref.var.global
 // CHECK-OVERLAY-NEXT: NSUTF8StringEncoding
 // CHECK-OVERLAY-NEXT: s:10Foundation20NSUTF8StringEncodingSuv
+// CHECK-OVERLAY-NEXT: source.lang.swift
 // CHECK-OVERLAY-NEXT: UInt
 // CHECK-OVERLAY-NEXT: $sSuD
 // CHECK-OVERLAY-NEXT: Foundation

test/SourceKit/CursorInfo/cursor_swiftonly_systemmodule.swift

@@ -31,6 +31,7 @@ func test() {
 // CHECK: source.lang.swift.ref.function.free ()
 // CHECK-NEXT: someFunc()
 // CHECK-NEXT: s:10SomeModule8someFuncyyF
+// CHECK-NEXT: source.lang.swift
 // CHECK-NEXT: () -> ()
 // CHECK-NEXT: $syycD
 // CHECK-NEXT: SomeModule

test/SourceKit/CursorInfo/cursor_usr.swift

@@ -19,6 +19,7 @@ func foo(x: FooStruct1) -> S1 {}
 // CHECK_SANITY1: source.lang.swift.decl.struct (5:8-5:10)
 // CHECK_SANITY1-NEXT: S1
 // CHECK_SANITY1-NEXT: s:10cursor_usr2S1
+// CHECK_SANITY1-NEXT: source.lang.swift
 // CHECK_SANITY1-NEXT: S1.Type
 // CHECK_SANITY1-NEXT: $s10cursor_usr2S1VmD
 // CHECK_SANITY1-NEXT: <Declaration>struct S1</Declaration>

test/SourceKit/CursorInfo/rdar_34348776.swift

@@ -7,6 +7,7 @@ public typealias Aliased = Alias
 // CHECK: source.lang.swift.decl.typealias (3:18-3:25)
 // CHECK-NEXT: Aliased
 // CHECK-NEXT: s:13rdar_343487767Aliaseda
+// CHECK-NEXT: source.lang.swift
 // CHECK-NEXT: Alias.Type
 // CHECK-NEXT: $s13rdar_343487765AliasamD
 // CHECK-NEXT: <Declaration>public typealias Aliased = <Type usr="s:13rdar_343487765Aliasa">Alias</Type></Declaration>

test/SourceKit/CursorInfo/result_builder.swift

@@ -48,6 +48,7 @@ func testAcceptColorTagged(i: Int, s: String) {
 // ATTR_NAME: source.lang.swift.ref.struct (19:8-19:21)
 // ATTR_NAME-NEXT: TaggedBuilder
 // ATTR_NAME-NEXT: s:11BuilderTest06TaggedA0V
+// ATTR_NAME-NEXT: source.lang.swift
 // ATTR_NAME-NEXT: TaggedBuilder<Tag>.Type
 // ATTR_NAME-NEXT: $s11BuilderTest06TaggedA0VyxGmD
 // ATTR_NAME-NEXT: <Declaration>@resultBuilder struct TaggedBuilder&lt;Tag&gt;</Declaration>
@@ -58,6 +59,7 @@ func testAcceptColorTagged(i: Int, s: String) {
 // ATTR_GENERICARG: source.lang.swift.ref.enum (31:6-31:11)
 // ATTR_GENERICARG-NEXT: Color
 // ATTR_GENERICARG-NEXT: s:11BuilderTest5ColorO
+// ATTR_GENERICARG-NEXT: source.lang.swift
 // ATTR_GENERICARG-NEXT: Color.Type
 // ATTR_GENERICARG-NEXT: $s11BuilderTest5ColorOmD
 // ATTR_GENERICARG-NEXT: <Declaration>enum Color</Declaration>
@@ -68,6 +70,7 @@ func testAcceptColorTagged(i: Int, s: String) {
 // CALL_BUILDERFUNC: source.lang.swift.ref.function.free (35:6-35:78)
 // CALL_BUILDERFUNC-NEXT: acceptColorTagged(body:)
 // CALL_BUILDERFUNC-NEXT: s:11BuilderTest17acceptColorTagged4bodyyxAA0D0OXE_tlF
+// CALL_BUILDERFUNC-NEXT: source.lang.swift
 // CALL_BUILDERFUNC-NEXT: <Result> (body: (Color) -> Result) -> ()
 // CALL_BUILDERFUNC-NEXT: $s4bodyyx11BuilderTest5ColorOXE_tcluD
 // CALL_BUILDERFUNC-NEXT: <Declaration>func acceptColorTagged&lt;Result&gt;(@<Type usr="s:11BuilderTest06TaggedA0V">TaggedBuilder</Type>&lt;<Type usr="s:11BuilderTest5ColorO">Color</Type>&gt; body: (<Type usr="s:11BuilderTest5ColorO">Color</Type>) -&gt; <Type usr="s:11BuilderTest17acceptColorTagged4bodyyxAA0D0OXE_tlF6ResultL_xmfp">Result</Type>)</Declaration>
@@ -78,6 +81,7 @@ func testAcceptColorTagged(i: Int, s: String) {
 // CLOSUREPARAM_DECL: source.lang.swift.decl.var.parameter (40:23-40:28)
 // CLOSUREPARAM_DECL-NEXT: color
 // CLOSUREPARAM_DECL-NEXT: s:11BuilderTest21testAcceptColorTagged1i1sySi_SStFAA0F0VyAA0E0OSiG_AFyAHSSGtAHXEfU_5colorL_AHvp
+// CLOSUREPARAM_DECL-NEXT: source.lang.swift
 // CLOSUREPARAM_DECL-NEXT: Color
 // CLOSUREPARAM_DECL-NEXT: $s11BuilderTest5ColorOD
 // CLOSUREPARAM_DECL-NEXT: <Declaration>let color: <Type usr="s:11BuilderTest5ColorO">Color</Type></Declaration>
@@ -88,6 +92,7 @@ func testAcceptColorTagged(i: Int, s: String) {
 // CLOSUREPARAM_USER: source.lang.swift.ref.var.local (40:23-40:28)
 // CLOSUREPARAM_USER-NEXT: color
 // CLOSUREPARAM_USER-NEXT: s:11BuilderTest21testAcceptColorTagged1i1sySi_SStFAA0F0VyAA0E0OSiG_AFyAHSSGtAHXEfU_5colorL_AHvp
+// CLOSUREPARAM_USER-NEXT: source.lang.swift
 // CLOSUREPARAM_USER-NEXT: Color
 // CLOSUREPARAM_USER-NEXT: $s11BuilderTest5ColorOD
 // CLOSUREPARAM_USER-NEXT: <Declaration>let color: <Type usr="s:11BuilderTest5ColorO">Color</Type></Declaration>
@@ -98,6 +103,7 @@ func testAcceptColorTagged(i: Int, s: String) {
 // CAPTURED_VALUE: source.lang.swift.ref.var.local (39:28-39:29)
 // CAPTURED_VALUE-NEXT: i
 // CAPTURED_VALUE-NEXT: s:11BuilderTest21testAcceptColorTagged1i1sySi_SStFACL_Sivp
+// CAPTURED_VALUE-NEXT: source.lang.swift
 // CAPTURED_VALUE-NEXT: Int
 // CAPTURED_VALUE-NEXT: $sSiD
 // CAPTURED_VALUE-NEXT: <Declaration>let i: <Type usr="s:Si">Int</Type></Declaration>
@@ -108,6 +114,7 @@ func testAcceptColorTagged(i: Int, s: String) {
 // CAPTURED_VALUE_METHOD: source.lang.swift.ref.function.method.instance (10:8-10:28)
 // CAPTURED_VALUE_METHOD: tag(_:)
 // CAPTURED_VALUE_METHOD: s:11BuilderTest8TaggablePAAE3tagyAA6TaggedVyqd__xGqd__lF
+// CAPTURED_VALUE_METHOD: source.lang.swift
 // CAPTURED_VALUE_METHOD: <Self, Tag where Self : Taggable> (Self) -> (Tag) -> Tagged<Tag, Self>
 // CAPTURED_VALUE_METHOD: $sy11BuilderTest6TaggedVyqd__xGqd__cluD
 // CAPTURED_VALUE_METHOD: <Container>$sSiD</Container>

test/SourceKit/InterfaceGen/gen_stdlib.swift

@@ -32,6 +32,7 @@ var x: Int
 // CHECK1:      source.lang.swift.ref.struct ()
 // CHECK1-NEXT: Int
 // CHECK1-NEXT: s:Si
+// CHECK1-NEXT: source.lang.swift
 // CHECK1-NEXT: Int.Type
 // CHECK1-NEXT: $s
 // CHECK1-NEXT: Swift{{$}}

tools/SourceKit/include/SourceKit/Core/LangSupport.h

@@ -391,6 +391,7 @@ struct CursorInfoData {
   StringRef InternalDiagnostic;
 
   UIdent Kind;
+  UIdent DeclarationLang;
   StringRef Name;
   StringRef USR;
   StringRef TypeName;

tools/SourceKit/lib/SwiftLang/SwiftLangSupport.cpp

@@ -307,6 +307,12 @@ void SwiftLangSupport::dependencyUpdated() {
   CompletionInst->markCachedCompilerInstanceShouldBeInvalidated();
 }
 
+UIdent SwiftLangSupport::getUIDForDeclLanguage(const swift::Decl *D) {
+  if (D->hasClangNode())
+    return KindObjC;
+  return KindSwift;
+}
+
 UIdent SwiftLangSupport::getUIDForDecl(const Decl *D, bool IsRef) {
   return UIdentVisitor(IsRef).visit(const_cast<Decl*>(D));
 }

tools/SourceKit/lib/SwiftLang/SwiftLangSupport.h

@@ -364,6 +364,7 @@ class SwiftLangSupport : public LangSupport {
   getFileSystem(const Optional<VFSOptions> &vfsOptions,
                 Optional<StringRef> primaryFile, std::string &error);
 
+  static SourceKit::UIdent getUIDForDeclLanguage(const swift::Decl *D);
   static SourceKit::UIdent getUIDForDecl(const swift::Decl *D,
                                          bool IsRef = false);
   static SourceKit::UIdent getUIDForExtensionOfDecl(const swift::Decl *D);

tools/SourceKit/lib/SwiftLang/SwiftSourceDocInfo.cpp

@@ -971,6 +971,7 @@ static bool passCursorInfoForDecl(SourceFile* SF,
   if (auto IFaceGenRef = Lang.getIFaceGenContexts().find(ModuleName, Invoc))
     ModuleInterfaceName = IFaceGenRef->getDocumentName();
 
+  UIdent DeclLang = SwiftLangSupport::getUIDForDeclLanguage(VD);
   UIdent Kind = SwiftLangSupport::getUIDForDecl(VD, IsRef);
   StringRef Name = StringRef(SS.begin()+NameBegin, NameEnd-NameBegin);
   StringRef USR = StringRef(SS.begin()+USRBegin, USREnd-USRBegin);
@@ -1040,6 +1041,7 @@ static bool passCursorInfoForDecl(SourceFile* SF,
   std::string TypeInterface;
 
   CursorInfoData Info;
+  Info.DeclarationLang = DeclLang;
   Info.Kind = Kind;
   Info.Name = Name;
   Info.USR = USR;

tools/SourceKit/tools/sourcekitd-test/sourcekitd-test.cpp

@@ -1580,6 +1580,12 @@ static void printCursorInfo(sourcekitd_variant_t Info, StringRef FilenameIn,
                                                               KeyModuleName);
   const char *GroupName = sourcekitd_variant_dictionary_get_string(Info,
                                                                    KeyGroupName);
+
+  sourcekitd_uid_t LangUID =
+      sourcekitd_variant_dictionary_get_uid(Info, KeyDeclarationLang);
+  const char *DeclLang = nullptr;
+  if (LangUID)
+    DeclLang = sourcekitd_uid_get_string_ptr(LangUID);
 
   const char *LocalizationKey =
     sourcekitd_variant_dictionary_get_string(Info, KeyLocalizationKey);
@@ -1693,6 +1699,8 @@ static void printCursorInfo(sourcekitd_variant_t Info, StringRef FilenameIn,
   OS << Name << '\n';
   if (USR)
     OS << USR << '\n';
+  if (DeclLang)
+    OS << DeclLang << "\n";
   if (Typename)
     OS << Typename << '\n';
   if (TypeUsr)

tools/SourceKit/tools/sourcekitd/lib/API/Requests.cpp

@@ -1757,6 +1757,8 @@ static void reportCursorInfo(const RequestResult<CursorInfoData> &Result,
   auto Elem = RespBuilder.getDictionary();
   Elem.set(KeyKind, Info.Kind);
   Elem.set(KeyName, Info.Name);
+  if (Info.DeclarationLang.isValid())
+    Elem.set(KeyDeclarationLang, Info.DeclarationLang);
   if (!Info.USR.empty())
     Elem.set(KeyUSR, Info.USR);
   if (!Info.TypeName.empty())

utils/gyb_sourcekit_support/UIDs.py

@@ -188,6 +188,7 @@ def __init__(self, internal_name, external_name):
     KEY('AnnotatedTypename', 'key.annotated.typename'),
     KEY('CompileOperation', 'key.compile_operation'),
     KEY('EffectiveAccess', 'key.effective_access'),
+    KEY('DeclarationLang', 'key.decl_lang'),
 ]
 
 
@@ -452,4 +453,6 @@ def __init__(self, internal_name, external_name):
     KIND('SyntaxTreeOff', 'source.syntaxtree.transfer.off'),
     KIND('SyntaxTreeIncremental', 'source.syntaxtree.transfer.incremental'),
     KIND('SyntaxTreeFull', 'source.syntaxtree.transfer.full'),
+    KIND('Swift', 'source.lang.swift'),
+    KIND('ObjC', 'source.lang.objc'),
 ]