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stdpp
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f37ad033
Commit
f37ad033
authored
Aug 13, 2019
by
Rodolphe Lepigre
Committed by
Robbert
Aug 13, 2019
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More lemmas about [map_imap].
parent
d983fe55
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CHANGELOG.md
CHANGELOG.md
+2
1
fin_maps.v
theories/fin_maps.v
+34
1
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CHANGELOG.md
View file @
f37ad033
...
...
@@ 4,7 +4,7 @@ APIbreaking change is listed.
## std++ 1.2.1 (unreleased)
This release of std++ received contributions by Michael Sammler, Paolo
G. Giarrusso, Ralf Jung, Robbert Krebbers,
and Simon Spies
.
G. Giarrusso, Ralf Jung, Robbert Krebbers,
Simon Spies, and Rodolphe Lepigre
.
Noteworthy additions and changes:
...
...
@@ 13,6 +13,7 @@ Noteworthy additions and changes:

Add typeclass
`Involutive`
.

Improved
`naive_solver`
performance in case the goal is trivially solvable.

A bunch of new lemmas for list operations.

`lookup_imap`
renamed into
`map_lookup_imap`
.
## std++ 1.2.0 (released 20190426)
...
...
theories/fin_maps.v
View file @
f37ad033
...
...
@@ 860,7 +860,7 @@ Proof.
Defined
.
(** Properties of the imap function *)
Lemma
lookup_imap
{
A
B
}
(
f
:
K
→
A
→
option
B
)
(
m
:
M
A
)
i
:
Lemma
map_
lookup_imap
{
A
B
}
(
f
:
K
→
A
→
option
B
)
(
m
:
M
A
)
i
:
map_imap
f
m
!!
i
=
m
!!
i
≫
=
f
i
.
Proof
.
unfold
map_imap
;
destruct
(
m
!!
i
≫
=
f
i
)
as
[
y
]
eqn
:
Hi
;
simpl
.
...
...
@@ 876,6 +876,39 @@ Proof.
rewrite
elem_of_map_to_list
in
Hj
;
simplify_option_eq
.
Qed
.
Lemma
map_imap_Some
{
A
}
(
m
:
M
A
)
:
map_imap
(
λ
_,
Some
)
m
=
m
.
Proof
.
apply
map_eq
.
intros
i
.
rewrite
map_lookup_imap
.
by
destruct
(
m
!!
i
).
Qed
.
Lemma
map_imap_insert
{
A
B
}
(
f
:
K
→
A
→
option
B
)
(
i
:
K
)
(
v
:
A
)
(
m
:
M
A
)
:
map_imap
f
(<[
i
:=
v
]>
m
)
=
match
f
i
v
with

None
=>
delete
i
(
map_imap
f
m
)

Some
w
=>
<[
i
:=
w
]>
(
map_imap
f
m
)
end
.
Proof
.
destruct
(
f
i
v
)
as
[
w
]
eqn
:
Hw
.

apply
map_eq
.
intros
k
.
rewrite
map_lookup_imap
.
destruct
(
decide
(
k
=
i
))
as
[>
Hk_not_i
].
+
by
rewrite
lookup_insert
,
lookup_insert
.
+
rewrite
!
lookup_insert_ne
by
done
.
by
rewrite
map_lookup_imap
.

apply
map_eq
.
intros
k
.
rewrite
map_lookup_imap
.
destruct
(
decide
(
k
=
i
))
as
[>
Hk_not_i
].
+
by
rewrite
lookup_insert
,
lookup_delete
.
+
rewrite
lookup_insert_ne
,
lookup_delete_ne
by
done
.
by
rewrite
map_lookup_imap
.
Qed
.
Lemma
map_imap_ext
{
A1
A2
B
}
(
f1
:
K
→
A1
→
option
B
)
(
f2
:
K
→
A2
→
option
B
)
(
m1
:
M
A1
)
(
m2
:
M
A2
)
:
(
∀
k
,
f1
k
<$>
(
m1
!!
k
)
=
f2
k
<$>
(
m2
!!
k
))
→
map_imap
f1
m1
=
map_imap
f2
m2
.
Proof
.
intros
HExt
.
apply
map_eq
.
intros
i
.
rewrite
!
map_lookup_imap
.
specialize
(
HExt
i
).
destruct
(
m1
!!
i
),
(
m2
!!
i
);
naive_solver
.
Qed
.
(** ** Properties of the size operation *)
Lemma
map_size_empty
{
A
}
:
size
(
∅
:
M
A
)
=
0
.
Proof
.
unfold
size
,
map_size
.
by
rewrite
map_to_list_empty
.
Qed
.
...
...
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