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-rw-r--r--butl/optional8
1 files changed, 4 insertions, 4 deletions
diff --git a/butl/optional b/butl/optional
index 21d686c..18eb67e 100644
--- a/butl/optional
+++ b/butl/optional
@@ -20,10 +20,10 @@ namespace butl
public:
typedef T value_type;
- optional (): null_ (true) {}
- optional (nullopt_t): null_ (true) {}
- optional (const T& v): value_ (v), null_ (false) {}
- optional (T&& v): value_ (std::move (v)), null_ (false) {}
+ constexpr optional (): value_ (), null_ (true) {} // VC14 needs value_().
+ constexpr optional (nullopt_t): value_ (), null_ (true) {}
+ constexpr optional (const T& v): value_ (v), null_ (false) {}
+ constexpr optional (T&& v): value_ (std::move (v)), null_ (false) {}
optional& operator= (nullopt_t) {value_ = T (); null_ = true; return *this;}
optional& operator= (const T& v) {value_ = v; null_ = false; return *this;}