3 files changed, 47 insertions, 0 deletions
diff --git a/mathcomp/ssrtest/abstract_var2.v b/mathcomp/ssrtest/abstract_var2.v
new file mode 100644
index 0000000..5372c5c
--- /dev/null
+++ b/mathcomp/ssrtest/abstract_var2.v
@@ -0,0 +1,16 @@
+Require Import ssreflect.
+
+Set Implicit Arguments.
+
+Axiom P : nat -> nat -> Prop.
+
+Axiom tr :
+  forall x y z, P x y -> P y z -> P x z.
+
+Lemma test a b c : P a c -> P a b.
+Proof.
+intro H.
+Fail have [: s1 s2] H1 : P a b := @tr _ _ _ s1 s2.
+have [: w s1 s2] H1 : P a b := @tr _ w _ s1 s2.
+Abort.
+
diff --git a/mathcomp/ssrtest/derive_inversion.v b/mathcomp/ssrtest/derive_inversion.v
new file mode 100644
index 0000000..71257d8
--- /dev/null
+++ b/mathcomp/ssrtest/derive_inversion.v
@@ -0,0 +1,19 @@
+Require Import ssreflect ssrbool.
+
+Set Implicit Arguments.
+
+  Inductive wf T : bool -> option T -> Type :=
+  | wf_f : wf false None
+  | wf_t : forall x, wf true (Some x).
+
+  Derive Inversion wf_inv with (forall T b (o : option T), wf b o) Sort Prop.
+
+  Lemma Problem T b (o : option T) :
+    wf b o ->
+    match b with
+    | true  => exists x, o = Some x
+    | false => o = None
+    end.
+  Proof.
+  by case: b; elim/wf_inv=>//;case: o=>// a *; exists a.
+  Qed.
diff --git a/mathcomp/ssrtest/explain_match.v b/mathcomp/ssrtest/explain_match.v
new file mode 100644
index 0000000..b79453b
--- /dev/null
+++ b/mathcomp/ssrtest/explain_match.v
@@ -0,0 +1,12 @@
+Require Import ssreflect ssrbool ssrnat.
+
+Definition addnAC := (addnA, addnC).
+
+Lemma test x y z : x + y + z =  x + y.
+
+ssrinstancesoftpat (_ + _).
+ssrinstancesofruleL2R addnC.
+ssrinstancesofruleR2L addnA.
+ssrinstancesofruleR2L addnAC.
+Fail ssrinstancesoftpat (_ + _ in RHS). (* Not implemented *)
+Admitted.
+\ No newline at end of file