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Module map.
Class map {value} := mk {
rep : Type;
get: rep -> option value;
empty : rep;
put : rep -> value -> rep;
}.
Arguments map : clear implicits.
Class ok {value : Type} {map : map value}: Prop := {
get_put_diff : forall m v, get (put m v) = None;
}.
Arguments ok {_} _.
End map.
Axiom wordX : Set.
Axiom e : wordX.
Section Equiv.
Context {Registers: map.map wordX}
{mem: map.map Corelib.Init.Byte.byte}.
Context (Registers_ok: @map.ok wordX Registers)
(mem_ok: @map.ok Byte.byte mem).
(** Check that cleared variables are correctly handled *)
Goal map.get (map.put map.empty e) = None.
Proof.
clear -Registers_ok.
apply map.get_put_diff.
Qed.
End Equiv.
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