From 64c52b3e89470891462641e605db20cade906b70 Mon Sep 17 00:00:00 2001
From: Alexey Shakula <alexeyshakula@gmail.com>
Date: Mon, 13 Nov 2023 10:08:10 -0500
Subject: [PATCH] Added absl::string_view constructor from std::string view if
 latter is available and those two are not the same

---
 absl/strings/string_view.h | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/absl/strings/string_view.h b/absl/strings/string_view.h
index f88b05b6bac..cc8d734fbdc 100644
--- a/absl/strings/string_view.h
+++ b/absl/strings/string_view.h
@@ -43,9 +43,11 @@
 #include "absl/base/optimization.h"
 #include "absl/base/port.h"
 
-#ifdef ABSL_USES_STD_STRING_VIEW
-
+#ifdef ABSL_HAVE_STD_STRING_VIEW
 #include <string_view>  // IWYU pragma: export
+#endif
+
+#ifdef ABSL_USES_STD_STRING_VIEW
 
 namespace absl {
 ABSL_NAMESPACE_BEGIN
@@ -201,6 +203,12 @@ class string_view {
   constexpr string_view(const char* data, size_type len)
       : ptr_(data), length_(CheckLengthInternal(len)) {}
 
+#ifdef ABSL_HAVE_STD_STRING_VIEW
+  // Implicit constructor from std::string view
+  constexpr string_view(std::string_view str)
+      : ptr_(str.data ()), length_(CheckLengthInternal(str.size())) {}  
+#endif
+
   // NOTE: Harmlessly omitted to work around gdb bug.
   //   constexpr string_view(const string_view&) noexcept = default;
   //   string_view& operator=(const string_view&) noexcept = default;