diff options
Diffstat (limited to 'src/util')
-rw-r--r-- | src/util/ref.h | 38 | ||||
-rw-r--r-- | src/util/system.h | 13 |
2 files changed, 13 insertions, 38 deletions
diff --git a/src/util/ref.h b/src/util/ref.h deleted file mode 100644 index 9685ea9fec..0000000000 --- a/src/util/ref.h +++ /dev/null @@ -1,38 +0,0 @@ -// Copyright (c) 2020 The Bitcoin Core developers -// Distributed under the MIT software license, see the accompanying -// file COPYING or http://www.opensource.org/licenses/mit-license.php. - -#ifndef BITCOIN_UTIL_REF_H -#define BITCOIN_UTIL_REF_H - -#include <util/check.h> - -#include <typeindex> - -namespace util { - -/** - * Type-safe dynamic reference. - * - * This implements a small subset of the functionality in C++17's std::any - * class, and can be dropped when the project updates to C++17 - * (https://github.com/bitcoin/bitcoin/issues/16684) - */ -class Ref -{ -public: - Ref() = default; - template<typename T> Ref(T& value) { Set(value); } - template<typename T> T& Get() const { CHECK_NONFATAL(Has<T>()); return *static_cast<T*>(m_value); } - template<typename T> void Set(T& value) { m_value = &value; m_type = std::type_index(typeid(T)); } - template<typename T> bool Has() const { return m_value && m_type == std::type_index(typeid(T)); } - void Clear() { m_value = nullptr; m_type = std::type_index(typeid(void)); } - -private: - void* m_value = nullptr; - std::type_index m_type = std::type_index(typeid(void)); -}; - -} // namespace util - -#endif // BITCOIN_UTIL_REF_H diff --git a/src/util/system.h b/src/util/system.h index 291f3f5541..29657e56e2 100644 --- a/src/util/system.h +++ b/src/util/system.h @@ -25,6 +25,7 @@ #include <util/threadnames.h> #include <util/time.h> +#include <any> #include <exception> #include <map> #include <optional> @@ -500,6 +501,18 @@ inline void insert(std::set<TsetT>& dst, const Tsrc& src) { dst.insert(src.begin(), src.end()); } +/** + * Helper function to access the contained object of a std::any instance. + * Returns a pointer to the object if passed instance has a value and the type + * matches, nullptr otherwise. + */ +template<typename T> +T* AnyPtr(const std::any& any) noexcept +{ + T* const* ptr = std::any_cast<T*>(&any); + return ptr ? *ptr : nullptr; +} + #ifdef WIN32 class WinCmdLineArgs { |