Function va_copy
unsafe fn va_copy<'f>(dest: *mut crate::ffi::va_list::VaList<'f>, src: &crate::ffi::va_list::VaList<'f>)Copies the current location of arglist src to the arglist dst.
Safety
You must check the following invariants before you call this function:
destmust be non-null and point to valid, writable memory.destmust not aliassrc.