Library AreaMethod.general_tactics
Ltac ExistHyp t := match goal with
| H1:t |- _ => idtac
end.
Ltac HypOfType t := match goal with
| H1:t |- _ => H1
end.
Ltac CleanDuplicatedHyps :=
repeat match goal with
| H:?X1 |- _ => clear H; ExistHyp X1
end.
Ltac not_exist_hyp t := match goal with
| H1:t |- _ => fail 2
end || idtac.
Ltac assert_if_not_exist H :=
not_exist_hyp H;assert H.
Ltac suppose t := cut t;[intro|idtac].
Ltac use H := decompose [and ex] H; clear H.
Ltac print_goal := match goal with
|- ?G => idtac G
end.
Ltac DecompEx H P := elim H;intro P;intro;clear H.
Ltac DecompExAnd H P :=
elim H;intro P;
let id:=fresh in intro id;decompose [and] id;clear id;clear H.
Ltac DecompAndAll :=
repeat
match goal with
| H:(?X1 /\ ?X2) |- _ => decompose [and] H;clear H
end.