Add absl::Status::MakeNonOkStatusWithOkCode() and absl::status_internal::StatusPrivateAccessor for private/internal use

PiperOrigin-RevId: 892483178
Change-Id: Ia439eb6bc941f75250c116eaf0dfb2924ec21c29

Author: Abseil Team

absl/status/internal/status_internal.h

@@ -59,6 +59,9 @@ enum class StatusCode : int;
 enum class StatusToStringMode : int;
 
 namespace status_internal {
+#ifndef SWIG
+class StatusPrivateAccessor;
+#endif  // !SWIG
 
 // Container for status payloads.
 struct Payload {

absl/status/status.cc

@@ -105,6 +105,13 @@ const std::string* absl_nonnull Status::MovedFromString() {
   return kMovedFrom.get();
 }
 
+absl::Status absl::Status::MakeNonOkStatusWithOkCode(
+    absl::string_view message) {
+  return absl::Status(
+      absl::Status::PointerToRep(new absl::status_internal::StatusRep(
+          absl::StatusCode::kOk, message, nullptr)));
+}
+
 uintptr_t Status::MakeRep(uintptr_t inlined_rep, absl::string_view msg,
                           absl::SourceLocation loc) {
   bool ok = inlined_rep == CodeToInlinedRep(absl::StatusCode::kOk);

absl/status/status.h

@@ -690,6 +690,16 @@ class ABSL_ATTRIBUTE_TRIVIAL_ABI Status final {
  private:
   friend Status CancelledError();
 
+#ifndef SWIG
+  // Returns a `Status` object which is not `ok()` but
+  // `code() == absl::StatusCode::kOk`. This is necessary to be compatible with
+  // `Status` objects created with an error code in a custom `ErrorSpace` that
+  // is mapped to the canonical code `absl::StatusCode::kOk`.
+  static Status MakeNonOkStatusWithOkCode(absl::string_view message);
+
+  friend class absl::status_internal::StatusPrivateAccessor;
+#endif  // !SWIG
+
   // Creates a status in the canonical error space with the specified
   // code, and an empty error message.
   explicit Status(absl::StatusCode code);