Abseil LTS 2020092320200923

What's New:
* `absl::StatusOr<T>` has been released. See our [blog
  post](https://abseil.io/blog/2020-091021-status) for more
  information.
* Abseil Flags reflection interfaces have been released.
* Abseil Flags memory usage has been significantly optimized.
* Abseil now supports a "hardened" build mode. This build mode enables
  runtime checks that guard against programming errors that may lead
  to security vulnerabilities.

Notable Fixes:
* Sanitizer dynamic annotations like `AnnotateRWLockCreate` that are
  also defined by the compiler sanitizer implementation are no longer
  also defined by Abseil.
* Sanitizer macros are now prefixed with `ABSL_` to avoid naming collisions.
* Sanitizer usage is now automatically detected and no longer requires
  macros like `ADDRESS_SANITIZER` to be defined on the command line.

Breaking Changes:
* Abseil no longer contains a `dynamic_annotations` library. Users
  using a supported build system (Bazel or CMake) are unaffected by
  this, but users manually specifying link libraries may get an error
  about a missing linker input.

Baseline: 7680a5f8efe32de4753baadbd63e74e59d95bac1
Cherry picks: None

1 files changed, 4 insertions, 12 deletions

diff --git a/absl/strings/internal/str_format/output.h b/absl/strings/internal/str_format/output.h
index 28b288b7..8030dae0 100644
--- a/absl/strings/internal/str_format/output.h
+++ b/absl/strings/internal/str_format/output.h
@@ -30,9 +30,6 @@
 
 namespace absl {
 ABSL_NAMESPACE_BEGIN
-
-class Cord;
-
 namespace str_format_internal {
 
 // RawSink implementation that writes into a char* buffer.
@@ -77,12 +74,6 @@ inline void AbslFormatFlush(std::ostream* out, string_view s) {
   out->write(s.data(), s.size());
 }
 
-template <class AbslCord, typename = typename std::enable_if<
-                              std::is_same<AbslCord, absl::Cord>::value>::type>
-inline void AbslFormatFlush(AbslCord* out, string_view s) {
-  out->Append(s);
-}
-
 inline void AbslFormatFlush(FILERawSink* sink, string_view v) {
   sink->Write(v);
 }
@@ -91,10 +82,11 @@ inline void AbslFormatFlush(BufferRawSink* sink, string_view v) {
   sink->Write(v);
 }
 
+// This is a SFINAE to get a better compiler error message when the type
+// is not supported.
 template <typename T>
-auto InvokeFlush(T* out, string_view s)
-    -> decltype(str_format_internal::AbslFormatFlush(out, s)) {
-  str_format_internal::AbslFormatFlush(out, s);
+auto InvokeFlush(T* out, string_view s) -> decltype(AbslFormatFlush(out, s)) {
+  AbslFormatFlush(out, s);
 }
 
 }  // namespace str_format_internal