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libraries/ArduinoJson/extras/tests/Helpers/Literals.hpp

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+// ArduinoJson - https://arduinojson.org
+// Copyright © 2014-2025, Benoit BLANCHON
+// MIT License
+
+#pragma once
+
+#include <string>
+
+// the space before _s is required by GCC 4.8
+inline std::string operator"" _s(const char* str, size_t len) {
+  return std::string(str, len);
+}