Merge pull request #30989 from CodaFi/of-no-avail

[Index][SR-9567] Allow unavailable decls to be walked

Author: Nathan Hawes

lib/Index/Index.cpp

@@ -301,8 +301,8 @@ class IndexSwiftASTWalker : public SourceEntityWalker {
   bool handleSourceOrModuleFile(SourceFileOrModule SFOrMod);
 
   bool walkToDeclPre(Decl *D, CharSourceRange Range) override {
-    // Do not handle unavailable decls.
-    if (AvailableAttr::isUnavailable(D))
+    // Do not handle unavailable decls from other modules.
+    if (IsModuleFile && AvailableAttr::isUnavailable(D))
       return false;
 
     if (!handleCustomAttrInitRefs(D))

test/Index/expressions.swift

@@ -59,6 +59,14 @@ func test2<X: AP>(x: X) {
   _ = type(of: x).A.self
 }
 
+@available(*, unavailable, renamed: "test")
+func test2(_ o: S1?) {
+  // CHECK: [[@LINE-1]]:6 | function/Swift | test2(_:) | [[test2_unavailable_USR:.*]] | Def
+  // CHECK: [[@LINE-2]]:17 | struct/Swift | S1 | [[S1_USR]] | Ref
+  test(o) // CHECK: [[@LINE]]:3 | function/Swift | test(_:) | {{.*}} | Ref,Call,RelCall,RelCont | rel: 1
+    // CHECK-NEXT: RelCall,RelCont | function/Swift | test2(_:) | [[test2_unavailable_USR]]
+}
+
 protocol Disposable {
   func dispose()
 }
@@ -67,4 +75,4 @@ func useDisposable(_ d: Disposable?) {
   // CHECK: [[@LINE+1]]:26 | instance-method/Swift | dispose() | s:14swift_ide_test10DisposableP7disposeyyF | Ref,RelCont | rel: 1
   guard let dispose = d?.dispose else { return }
   _ = dispose
-}
+}

test/SourceKit/Indexing/index.swift.response

@@ -1520,6 +1520,27 @@
         }
       ]
     },
+    {
+      key.kind: source.lang.swift.decl.class,
+      key.name: "AlwaysUnavailableClass",
+      key.usr: <usr>,
+      key.line: 184,
+      key.column: 7,
+      key.entities: [
+        {
+          key.kind: source.lang.swift.decl.function.constructor,
+          key.usr: <usr>,
+          key.line: 184,
+          key.column: 7,
+          key.is_implicit: 1
+        }
+      ],
+      key.attributes: [
+        {
+          key.attribute: source.decl.attribute.available
+        }
+      ]
+    },
     {
       key.kind: source.lang.swift.decl.class,
       key.name: "ConditionalUnavailableClass1",