subst this
nfa : NFA
pos : String.Pos
next : SparseSet nfa.nodes.size
currentSave : Array (Option String.Pos)
matched : Option (Array (Option String.Pos))
saveSlots : Data.Vec (Array (Option String.Pos)) nfa.nodes.size
matched' : Option (Array (Option String.Pos))
next' : SparseSet nfa.nodes.size
saveSlots' : Data.Vec (Array (Option String.Pos)) nfa.nodes.size
h : (matched, next, saveSlots) = (matched', next', saveSlots')
inv : LowerInvεClosure nfa next #[]
hemp : #[].isEmpty = true
this : next = next'
⊢ LowerInvεClosure nfa next' #[]
nfa : NFA
pos : String.Pos
next : SparseSet nfa.nodes.size
currentSave : Array (Option String.Pos)
matched : Option (Array (Option String.Pos))
saveSlots : Data.Vec (Array (Option String.Pos)) nfa.nodes.size
matched' : Option (Array (Option String.Pos))
saveSlots' : Data.Vec (Array (Option String.Pos)) nfa.nodes.size
inv : LowerInvεClosure nfa next #[]
hemp : #[].isEmpty = true
h : (matched, next, saveSlots) = (matched', next, saveSlots')
⊢ LowerInvεClosure nfa next #[]