libstdc++: Add noexcept to std::nullopt_t constructor

Signed-off-by: Jonathan Wakely <jwakely@redhat.com>
libstdc++-v3/ChangeLog:

	* include/std/optional (nullptr_t): Make constructor noexcept.

diff --git a/libstdc++-v3/include/std/optional b/libstdc++-v3/include/std/optional
index b8ab75107572d7fe56ce649fe4f6e9506e3b5cd5..b6ebe12b3e1905ce4b6861f426d9c076ed928a16 100644 (file)
--- a/libstdc++-v3/include/std/optional
+++ b/libstdc++-v3/include/std/optional
@@ -70,7 +70,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     enum class _Construct { _Token };
 
     // Must be constexpr for nullopt_t to be literal.
-    explicit constexpr nullopt_t(_Construct) { }
+    explicit constexpr nullopt_t(_Construct) noexcept { }
   };
 
   /// Tag to disengage optional objects.