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#define ATS_DYNLOADFLAG 0
staload "lib/SATS/valid.sats"
assume valid(a:viewt@ype,b:bool) = (a,bool b)
implement{a} create_valid(value) = (value,true)
// Create unvalid value by casting null pointer to type.
implement{a} create_unvalid() = let
staload UN = "prelude/SATS/unsafe.sats"
in
($extval(a,"(void *)NULL"),false) //UNSAFE:
end
implement{a} unwrap_valid(v) = v.0
implement{a} is_valid(v) = v.1
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