diff options
| -rw-r--r-- | src/libutil/lru-cache.hh | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/src/libutil/lru-cache.hh b/src/libutil/lru-cache.hh index 3cb5d5088..9b8290e63 100644 --- a/src/libutil/lru-cache.hh +++ b/src/libutil/lru-cache.hh @@ -2,6 +2,7 @@ #include <map> #include <list> +#include <experimental/optional> namespace nix { @@ -63,18 +64,17 @@ public: /* Look up an item in the cache. If it exists, it becomes the most recently used item. */ - // FIXME: use boost::optional? - Value * get(const Key & key) + std::experimental::optional<Value> get(const Key & key) { auto i = data.find(key); - if (i == data.end()) return 0; + if (i == data.end()) return {}; /* Move this item to the back of the LRU list. */ lru.erase(i->second.first.it); auto j = lru.insert(lru.end(), i); i->second.first.it = j; - return &i->second.second; + return i->second.second; } size_t size() |