Adding more support and testing for int128 and uint128 flags from cl/534444213

PiperOrigin-RevId: 539726003
Change-Id: Ie38f8d48a7b4c9d498fc1c4c4af6138048f80f68

1 files changed, 12 insertions, 0 deletions

diff --git a/absl/flags/marshalling.cc b/absl/flags/marshalling.cc
index cf6312b1..50b7b331 100644
--- a/absl/flags/marshalling.cc
+++ b/absl/flags/marshalling.cc
@@ -19,6 +19,7 @@
 
 #include <cmath>
 #include <limits>
+#include <sstream>
 #include <string>
 #include <type_traits>
 #include <vector>
@@ -198,6 +199,17 @@ std::string Unparse(long v) { return absl::StrCat(v); }
 std::string Unparse(unsigned long v) { return absl::StrCat(v); }
 std::string Unparse(long long v) { return absl::StrCat(v); }
 std::string Unparse(unsigned long long v) { return absl::StrCat(v); }
+std::string Unparse(absl::int128 v) {
+  std::stringstream ss;
+  ss << v;
+  return ss.str();
+}
+std::string Unparse(absl::uint128 v) {
+  std::stringstream ss;
+  ss << v;
+  return ss.str();
+}
+
 template <typename T>
 std::string UnparseFloatingPointVal(T v) {
   // digits10 is guaranteed to roundtrip correctly in string -> value -> string