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Pulse.Class.Small: a class for small vprops #45

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merged 1 commit into from
Apr 13, 2024
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Pulse.Class.Small: a class for small vprops #45

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26 changes: 26 additions & 0 deletions lib/pulse/lib/class/Pulse.Class.Small.fst
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Original file line number Diff line number Diff line change
@@ -0,0 +1,26 @@
module Pulse.Class.Small

open Pulse.Lib.Pervasives

instance small_emp : small emp = {
pf = ();
}

instance small_star
(p q : vprop)
(sp : small p)
(sq : small q)
: small (p ** q) = {
pf = ();
}

instance small_pure
(p : prop)
: small (pure p) = {
pf = ();
}

let small_from_small_ref (v:vprop) (_ : squash (is_small v))
: small v = {
pf = ();
}
20 changes: 20 additions & 0 deletions lib/pulse/lib/class/Pulse.Class.Small.fsti
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Original file line number Diff line number Diff line change
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module Pulse.Class.Small

open Pulse.Lib.Pervasives

class small (v : vprop) = {
pf : squash (is_small v);
}

instance val small_emp : small emp

instance val small_star
(p q : vprop)
(sp : small p)
(sq : small q) : small (p ** q)

instance val small_pure (p : prop) : small (pure p)

(* Intentionally not an instance. *)
val small_from_small_ref (v:vprop) (_ : squash (is_small v))
: small v
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