HostLayout struct #
HostLayout marks a struct as using host memory layout. A struct with a field of type HostLayout will be laid out in memory according to host expectations, generally following the host's C ABI. HostLayout does not affect layout within any other struct-typed fields of the containing struct, nor does it affect layout of structs containing the struct marked as host layout. By convention, HostLayout should be used as the type of a field named "_", placed at the beginning of the struct type definition.
type HostLayout struct {
_ hostLayout
}