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lib/ArduinoStreamUtils/src/StreamUtils/Polyfills.hpp

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+// StreamUtils - github.com/bblanchon/ArduinoStreamUtils
+// Copyright Benoit Blanchon 2019-2021
+// MIT License
+
+#pragma once
+
+namespace StreamUtils {
+namespace Polyfills {
+
+template <typename T>
+struct remove_reference {
+  using type = T;
+};
+
+template <typename T>
+struct remove_reference<T &> {
+  using type = T;
+};
+
+template <typename T>
+typename remove_reference<T>::type &&move(T &&t) {
+  return static_cast<typename remove_reference<T>::type &&>(t);
+}
+
+// poor man's std::function<void()>
+class function {
+  struct callable_base {
+    virtual void operator()() = 0;
+    virtual ~callable_base() {}
+  };
+
+  template <typename Functor>
+  struct callable : callable_base {
+    Functor functor;
+    callable(Functor functor) : functor(functor) {}
+    virtual void operator()() {
+      functor();
+    }
+  };
+
+  callable_base *_callable;
+
+ public:
+  template <typename Functor>
+  function(Functor f) {
+    _callable = new callable<Functor>(f);
+  }
+  function(function &&src) {
+    _callable = src._callable, src._callable = 0;
+  }
+  ~function() {
+    delete _callable;
+  }
+  void operator()() const {
+    (*_callable)();
+  }
+};
+
+}  // namespace Polyfills
+}  // namespace StreamUtils