diff options
| author |  Matthieu Sozeau <matthieu.sozeau@inria.fr> | 2014-09-25 00:12:26 +0200 |
|---|---|---|
| committer | Matthieu Sozeau <matthieu.sozeau@inria.fr> | 2014-09-27 21:56:58 +0200 |
| commit | 3fe4912b568916676644baeb982a3e10c592d887 (patch) | |
| tree | 291c25d55d62c94af8fc3eb5a6d6df1150bc893f /theories/FSets/FMapFullAVL.v | |
| parent | a95210435f336d89f44052170a7c65563e6e35f2 (diff) | |
Keyed unification option, compiling the whole standard library
(but deactivated still).
Set Keyed Unification to activate the option, which changes
subterm selection to _always_ use full conversion _after_ finding a
subterm whose head/key matches the key of the term we're looking for.
This applies to rewrite and higher-order unification in
apply/elim/destruct.
Most proof scripts already abide by these semantics. For those that
don't, it's usually only a matter of using:
Declare Equivalent Keys f g.
This make keyed unification consider f and g to match as keys.
This takes care of most cases of abbreviations: typically Def foo :=
bar and rewriting with a bar-headed lhs in a goal mentioning foo works
once they're set equivalent.
For canonical structures, these hints should be automatically declared.
For non-global-reference headed terms, the key is the constructor name
(Sort, Prod...). Evars and metas are no keys.
INCOMPATIBILITIES:
In FMapFullAVL, a Function definition doesn't go through with keyed
unification on.
Diffstat (limited to 'theories/FSets/FMapFullAVL.v')
| -rw-r--r-- | theories/FSets/FMapFullAVL.v | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/theories/FSets/FMapFullAVL.v b/theories/FSets/FMapFullAVL.v index dea23d68c..a7be32328 100644 --- a/theories/FSets/FMapFullAVL.v +++ b/theories/FSets/FMapFullAVL.v @@ -674,6 +674,8 @@ Module IntMake_ord (I:Int)(X: OrderedType)(D : OrderedType) <: Definition cardinal_e_2 ee := (cardinal_e (fst ee) + cardinal_e (snd ee))%nat. + Local Unset Keyed Unification. + Function compare_aux (ee:Raw.enumeration D.t * Raw.enumeration D.t) { measure cardinal_e_2 ee } : comparison := match ee with |