whileTestP : {l : Level} {t : Set l} → (c10 : ℕ) → (Code : Envc → t) → t
whileTestP c10 next = next (record {c10 = c10 ; varn = c10 ; vari = 0 })

whileLoopP' : {l : Level} {t : Set l} → Envc → (next : Envc → t) → (exit : Envc → t) → t
whileLoopP' record { c10 = c10 ; varn = zero ; vari = vari } _ exit = exit record { c10 = c10 ; varn = zero ; vari = vari }
whileLoopP' record { c10 = c10 ; varn = suc varn1 ; vari = vari } next _ = next (record {c10 = c10 ; varn = varn1 ; vari = suc vari })

{-# TERMINATING #-}
loopP : {l : Level} {t : Set l} → Envc → (exit : Envc → t) → t
loopP env exit = whileLoopP' env (λ env → loopP env exit ) exit

whileTestPCall : (c10 :  ℕ ) → Envc
whileTestPCall c10 = whileTestP {_} {_} c10 (λ env → loopP env (λ env →  env))

-- whileTestPCall 10
-- record { c10 = 10 ; varn = 0 ; vari = 10 }