1+++
2title = "`static void narrow_error_check(Impl &&) noexcept`"
3description = "Observer policy performing hard UB if no error is present. Constexpr, never throws."
4categories = ["observer-policies"]
5weight = 410
6+++
7
8Observer policy performing hard UB if no error is present, by calling {{% api "static void _ub(Impl &&)" %}}. Constexpr where possible.
9
10*Requires*: Always available.
11
12*Complexity*: Constant time.
13
14*Guarantees*: Never throws an exception.
15