1 files changed, 7 insertions, 0 deletions
diff --git a/third_party/base/stl_util.h b/third_party/base/stl_util.h
index 96947f5e53..9c71530c12 100644
--- a/third_party/base/stl_util.h
+++ b/third_party/base/stl_util.h
@@ -10,6 +10,7 @@
 #include <set>
 
 #include "third_party/base/numerics/safe_conversions.h"
+#include "third_party/base/stl_util.h"
 
 namespace pdfium {
 
@@ -67,6 +68,12 @@ class ScopedSetInsertion {
   const T m_Entry;
 };
 
+// std::clamp(), some day.
+template <class T>
+constexpr const T& clamp(const T& v, const T& lo, const T& hi) {
+  return std::min(std::max(v, lo), hi);
+}
+
 }  // namespace pdfium
 
 #endif  // PDFIUM_THIRD_PARTY_BASE_STL_UTIL_H_