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stdpp
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49a61c0d
Commit
49a61c0d
authored
May 31, 2016
by
Robbert Krebbers
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More documentation of f_equiv.
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theories/tactics.v
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theories/tactics.v
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49a61c0d
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@@ 250,11 +250,13 @@ Ltac setoid_subst :=

H
:
@
equiv
?A
?e
_
?x

_
=>
symmetry
in
H
;
setoid_subst_aux
(@
equiv
A
e
)
x
end
.
(** f_equiv works on goals of the form
"
f _ = f _
"
, for any relation and any
number of arguments. It looks for an appropriate
"
Proper
"
instance, and applies
(** f_equiv works on goals of the form
[
f _ = f _
]
, for any relation and any
number of arguments. It looks for an appropriate
[
Proper
]
instance, and applies
it. The tactic is somewhat limited, since it cannot be used to backtrack on
the Proper instances that has been found. To that end, we try to ensure the
trivial instance in which the resulting goals have an [eq]. *)
trivial instance in which the resulting goals have an [eq]. More generally,
when having [Proper (equiv ==> dist) f] and [Proper (dist ==> dist) f], it will
favor the second. *)
Ltac
f_equiv
:
=
match
goal
with

_
=>
reflexivity
...
...
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