1 files changed, 48 insertions, 0 deletions
diff --git a/contrib/llvm-project/clang/lib/AST/Availability.cpp b/contrib/llvm-project/clang/lib/AST/Availability.cpp
new file mode 100644
index 000000000000..238359a2dedf
--- /dev/null
+++ b/contrib/llvm-project/clang/lib/AST/Availability.cpp
@@ -0,0 +1,48 @@
+//===- Availability.cpp --------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the Availability information for Decls.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/AST/Availability.h"
+#include "clang/AST/ASTContext.h"
+#include "clang/AST/Attr.h"
+#include "clang/AST/Decl.h"
+#include "clang/Basic/TargetInfo.h"
+
+namespace clang {
+
+AvailabilityInfo AvailabilityInfo::createFromDecl(const Decl *Decl) {
+  ASTContext &Context = Decl->getASTContext();
+  StringRef PlatformName = Context.getTargetInfo().getPlatformName();
+  AvailabilityInfo Availability;
+
+  // Collect availability attributes from all redeclarations.
+  for (const auto *RD : Decl->redecls()) {
+    for (const auto *A : RD->specific_attrs<AvailabilityAttr>()) {
+      if (A->getPlatform()->getName() != PlatformName)
+        continue;
+      Availability = AvailabilityInfo(
+          A->getPlatform()->getName(), A->getIntroduced(), A->getDeprecated(),
+          A->getObsoleted(), A->getUnavailable(), false, false);
+      break;
+    }
+
+    if (const auto *A = RD->getAttr<UnavailableAttr>())
+      if (!A->isImplicit())
+        Availability.UnconditionallyUnavailable = true;
+
+    if (const auto *A = RD->getAttr<DeprecatedAttr>())
+      if (!A->isImplicit())
+        Availability.UnconditionallyDeprecated = true;
+  }
+  return Availability;
+}
+
+} // namespace clang