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stdpp
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b8ba5d8a
Commit
b8ba5d8a
authored
Nov 16, 2017
by
Ralf Jung
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factor out solve_proper preparation into a separate tactic
parent
461bc9c9
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theories/tactics.v
theories/tactics.v
+14
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theories/tactics.v
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b8ba5d8a
...
...
@@ 335,11 +335,10 @@ Ltac solve_proper_unfold :=


?R
(
?f
_
_
)
(
?f
_
_
)
=>
unfold
f


?R
(
?f
_
)
(
?f
_
)
=>
unfold
f
end
.
(** The tactic [solve_proper_core tac] solves goals of the form "Proper (R1 ==> R2)", for
any number of relations. The actual work is done by repeatedly applying
[tac]. *)
Ltac
solve_proper_core
tac
:
=
(* [solve_proper_prepare] does some preparation work before the main
[solve_proper] loop. Having this as a separate tactic is useful for
debugging [solve_proper] failure. *)
Ltac
solve_proper_prepare
:
=
(* Introduce everything *)
intros
;
repeat
lazymatch
goal
with
...
...
@@ 348,10 +347,18 @@ Ltac solve_proper_core tac :=


pointwise_relation
_
_
_
_
=>
intros
?


?R
?f
_
=>
try
let
f'
:
=
constr
:
(
λ
x
,
f
x
)
in
intros
?
end
;
simplify_eq
;
(*
Now do the job.
We try with and without unfolding. We have to backtrack on
(* We try with and without unfolding. We have to backtrack on
that because unfolding may succeed, but then the proof may fail. *)
(
solve_proper_unfold
+
idtac
)
;
simpl
;
(
solve_proper_unfold
+
idtac
)
;
simpl
.
(** The tactic [solve_proper_core tac] solves goals of the form "Proper (R1 ==> R2)", for
any number of relations. The actual work is done by repeatedly applying
[tac]. *)
Ltac
solve_proper_core
tac
:
=
solve_proper_prepare
;
(* Now do the job. *)
solve
[
repeat
first
[
eassumption

tac
()]
].
(** Finally, [solve_proper] tries to apply [f_equiv] in a loop. *)
Ltac
solve_proper
:
=
solve_proper_core
ltac
:
(
fun
_
=>
f_equiv
).
(** The tactic [intros_revert tac] introduces all foralls/arrows, performs tac,
...
...
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