exact eachStepChar_spec.preserve_cls.go h (stepChar_spec.preserve_cls hres inv)
nfa : NFA
c : Char
pos : String.Pos
current : SparseSet nfa.nodes.size
i : ℕ
hle : i ≤ current.count
next : SparseSet nfa.nodes.size
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
inv : ∀ (i j : Fin nfa.nodes.size), i ∈ next → ↑j ∈ nfa.εStep ↑i → j ∈ next
hi : ¬i = current.count
hlt : i < current.count
result :
  Option (Array (Option String.Pos)) × SparseSet nfa.nodes.size × 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
hres : stepChar nfa c pos next saveSlots current[i] = (matched'', next'', saveSlots'')
x✝ : Option (Array (Option String.Pos))
heq✝ : (matched'', next'', saveSlots'').1 = none
h : eachStepChar.go nfa c pos current (i + 1) ⋯ next'' saveSlots'' = (matched', next', saveSlots')
⊢ ∀ (i j : Fin nfa.nodes.size), i ∈ next' → ↑j ∈ nfa.εStep ↑i → j ∈ next'
no goals