diff options
Diffstat (limited to 'lib/cache.h')
| -rw-r--r-- | lib/cache.h | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/lib/cache.h b/lib/cache.h index 2a651f0..cdc0a2e 100644 --- a/lib/cache.h +++ b/lib/cache.h @@ -2,13 +2,15 @@ #define CACHE_H #include "special_members.hpp" +#include <functional> #include <map> #include <memory> -#include <string> +#include <tuple> -template<typename Obj> class Cache { +template<typename Obj, typename... KeyParts> class Cache { public: using Ptr = std::shared_ptr<Obj>; + using Key = std::tuple<KeyParts...>; Cache() = default; virtual ~Cache() = default; @@ -16,22 +18,23 @@ public: NO_COPY(Cache); [[nodiscard]] Ptr - get(const std::string & key) + get(const KeyParts &... keyparts) { + auto key = std::tie(keyparts...); if (auto e = cached.find(key); e != cached.end()) { return e->second; } - return cached.emplace(key, construct(key)).first->second; + return cached.emplace(key, construct(keyparts...)).first->second; } [[nodiscard]] virtual Ptr - construct(const std::string & key) const + construct(const KeyParts &... keyparts) const { - return std::make_shared<Obj>(key); + return std::make_shared<Obj>(keyparts...); } private: - std::map<std::string, Ptr> cached; + std::map<Key, Ptr, std::less<>> cached; }; // IWYU pragma: no_forward_declare Cache |