From a56715378721d8abd0ae379a83b9c1ee0b1a9a30 Mon Sep 17 00:00:00 2001
From: Greg Falcon <gfalcon@google.com>
Date: Tue, 31 May 2022 14:00:42 -0700
Subject: Add an internal helper for logging (upcoming).

PiperOrigin-RevId: 452134803
Change-Id: I8660df850ab537c441399545b25eb32399b2a3ef
---
 absl/status/internal/status_internal.h |  9 +++++++++
 absl/status/status.cc                  | 12 ++++++++++++
 2 files changed, 21 insertions(+)

diff --git a/absl/status/internal/status_internal.h b/absl/status/internal/status_internal.h
index 34914d2e..fc1e78bc 100644
--- a/absl/status/internal/status_internal.h
+++ b/absl/status/internal/status_internal.h
@@ -69,6 +69,15 @@ struct StatusRep {
 };
 
 absl::StatusCode MapToLocalCode(int value);
+
+// If `status` is not OK, returns a pointer to a newly-allocated string with the
+// given `prefix`, suitable for output as an error message in assertion/CHECK()
+// failures. Otherwise returns nullptr.
+//
+// This is an internal implementation detail for Abseil logging.
+std::string* MakeCheckFailString(const absl::Status& status,
+                                 const char* prefix);
+
 }  // namespace status_internal
 
 ABSL_NAMESPACE_END
diff --git a/absl/status/status.cc b/absl/status/status.cc
index fc5a1425..c66009d6 100644
--- a/absl/status/status.cc
+++ b/absl/status/status.cc
@@ -599,5 +599,17 @@ Status ErrnoToStatus(int error_number, absl::string_view message) {
                 MessageForErrnoToStatus(error_number, message));
 }
 
+namespace status_internal {
+
+std::string* MakeCheckFailString(const absl::Status& status,
+                                 const char* prefix) {
+  if (status.ok()) { return nullptr; }
+  return new std::string(
+      absl::StrCat(prefix, " (",
+                   status.ToString(StatusToStringMode::kWithEverything), ")"));
+}
+
+}  // namespace status_internal
+
 ABSL_NAMESPACE_END
 }  // namespace absl
-- 
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