Function Try Blocks In destructor

suggest change
struct A
    ~A() noexcept(false) try
        // destructor body 
    catch (...)
        // exceptions of destructor body are caught here
        // if no exception is thrown here
        // then the caught exception is re-thrown.

Note that, although this is possible, one needs to be very careful with throwing from destructor, as if a destructor called during stack unwinding throws an exception, std::terminate is called.

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