Modern C++ Programming Cookbook

How to do it...

Use the following constructs to specify or query exception specifications:

• Use nothrow in a function declaration to indicate that the function is not throwing any exception:

        void func_no_throw() noexcept        {        }

• Use nothrow(expr) in a function declaration, such as template metaprogramming, to indicate that the function may or may not throw an exception based on a condition that evaluates to bool:

        template <typename T>        T generic_func_1()        noexcept(std::is_nothrow_constructible<T>::value)        {          return T{};        }

• Use the noexcept operator at compile time to check whether an expression is declared to not throw any exception:

        template <typename T>        T generic_func_2() noexcept(noexcept(T{}))        {          return T{};        } template <typename F, typename ...