From 46bebace20b3d6a3f1785a0881c23fb14763ad55 Mon Sep 17 00:00:00 2001
From: Martchus <martchus@gmx.net>
Date: Thu, 28 Nov 2019 21:32:41 +0100
Subject: [PATCH] Consider std::basic_string_view a string in Traits::IsString

* Fix e.g. using std::string_view with CppUnit and
  the tests/testutils.h header
* Fix documentation
* Possibly a source incompatible change in some rare uses but
  not worth a major version bump
---
 misc/traits.h | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/misc/traits.h b/misc/traits.h
index f93b557..edf600f 100644
--- a/misc/traits.h
+++ b/misc/traits.h
@@ -97,8 +97,11 @@ template <typename T>
 struct IsCString
     : Bool<std::is_same<char const *, typename std::decay<T>::type>::value || std::is_same<char *, typename std::decay<T>::type>::value> {
 };
-/// \brief Evaluates to Bool<true> if the specified type is a C-string (char * or const char *); otherwise evaluates to Bool<false>.
-template <typename T> struct IsString : Bool<IsCString<T>::value || IsSpecializationOf<T, std::basic_string>::value> {
+/// \brief Evaluates to Bool<true> if the specified type is a standard string, standard string view or C-string (char * or const char *); otherwise
+/// evaluates to Bool<false>.
+template <typename T>
+struct IsString
+    : Bool<IsCString<T>::value || IsSpecializationOf<T, std::basic_string>::value || IsSpecializationOf<T, std::basic_string_view>::value> {
 };
 
 /// \brief Evaluates to Bool<true> if the specified type is complete; if the type is only forward-declared it evaluates to Bool<false>.