Refactored string adapters: only one IsString<T> and adaptString()

src/ArduinoJson/Strings/StringAdapter.hpp

@@ -0,0 +1,32 @@
+// ArduinoJson - https://arduinojson.org
+// Copyright Benoit Blanchon 2014-2021
+// MIT License
+
+#pragma once
+
+#include <ArduinoJson/Polyfills/type_traits.hpp>
+
+namespace ARDUINOJSON_NAMESPACE {
+
+template <typename T, bool bounded = false, typename Enable = void>
+class StringAdapter;
+
+template <typename T>
+inline StringAdapter<T, false> adaptString(const T& str) {
+  return StringAdapter<T, false>(str);
+}
+
+template <typename T>
+inline StringAdapter<T, true> adaptString(const T& str, size_t sz) {
+  return StringAdapter<T, true>(str, sz);
+}
+
+template <typename T, typename Enable = void>
+struct IsString : false_type {};
+
+template <typename T>
+struct IsString<
+    T, typename make_void<typename StringAdapter<T>::storage_policy>::type>
+    : true_type {};
+
+}  // namespace ARDUINOJSON_NAMESPACE