Quelle matching.v Sprache: Coq

Require Import Ltac2.Ltac2 Ltac2.Notations.

Ltac2 Typeexn ]java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
true;
Ltac2 | >. (.of_constr
| true =
| =>Control java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 29
end (   ) x ) (  ),True

Ltac2 ':?t|-
|ue java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 12
| false   :t ' ?| _ ] =>
end.

Goal h@
Proofjava.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16
Fail    > h def2
let:{  := } in
let f c :=
  match!reverse
  | true => Message.print_-_]   h @java.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 37
  | false! goal
  end
in
(** This fails because the matching is not allowed to backtrack once
    it commits to a branch*)
lazy_match
lazy_match! Control :context ], :=context] h3 [  ] -  >)

(** This one works by taking the second match context, i.e. ?a := nat *)       [ bool-  > )
let{ := } java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32
let f c :=
  match. c2.add+0
  | true => b.(contents) := (.instantiate )
  !
  end
in
match -) context
Abort.

Goal forall (i j : unit) v2
Proof
Fail match (attern ') 'java.lang.StringIndexOutOfBoundsException: Index 53 out of bounds for length 53
| [:?,' : ?t |- _ ] => ()
end.
intros i j x y b.
match! goal with
| [ h : ?t, h' : ?t |- _ ] =>
  check_id h @x;
  check_id h' @y
end.
match! reverse goal with
| [ h : ?t, h' : ?t |- _ ] =>
  check_id h @j;
  check_id h' @i
end.

pose (def1 := 0 + 0).
pose (def2 := true).
match! goal with
| [ h := _ |- _ ] => check_id h @def2
end.
match! reverse goal with
| [ h := _ |- _ ] => check_id h @def1
end.
match! goal with
| [ h := _ : nat |- _ ] => check_id h @def1
end.
match! goal with
| [ h : nat |- _ ] => check_id h @def1
end.
match! reverse goal with
| [ h : nat |- _ ] => check_id h @x
end.
match! goal with
| [ h := ?v |- _ ] => check_constr v constr:(true)
end.
match! goal with
| [ h := context c [ 0 ] |- _ ] => check_constr (Pattern.instantiate c constr:(3)) constr:(3 + 0)
end.
match! goal with
  h1 [ unit ] , h2= [    h3 [bool  -_] >)
end.
match! goal with
| [ h1 : unit , h2 := context [ 0 ] , h3 : context [ bool| [ -2=))
endend)
lazy_matchfun java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 10
| [ h1 : context c1 [ ?t1| None>)
    check_constr t1 'bool|  = Control. e
    check_constr ';
    check_constr t2 'bool >.zero
    check_constr (Pattern.instantiate
    check_constr (Pattern.instantiate c2 '(Nat.add 1)) '(1 + 0);
stantiate)
end.
match! goal with
| [ Ltac2  =
    check_constr v2 '0;
    check_constr t2 'bool;
    check_constr (Pattern.instantiate c2 '(Nat  java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16
    check_constr (PatternEnd.
end.
Abort

(* Check #79 *)
2=.
  Control.plus
    (fun
=!
    | [ |- 2 = 3 ] => Control,  >)
    [-  _] = Control ( (Some "shouldnot be ")java.lang.StringIndexOutOfBoundsException: Index 102 out of bounds for length 102
     end|,_>)
    (fun e
     => match e with
         c
          |_ One=)
             | None =>end
java.lang.StringIndexOutOfBoundsException: Range [17, 13) out of bounds for length 34

        | e => Control.zero_ One None> (
        end).
Abort.

Fail Ltac2
Ltac2Succeed test x :=

Module StupidTuple     x with
  Ltac2foo x :=
    match x with
    | ((a,b),c) => b
    end .

  Fail Ltac2 Eval foo (1,2).
End StupidTuple.

Module Empty _,Nil => ()
  Ltac2| One, _=> )
  Ltac2     _ One>()
End Empty     Cons_,_= ()

Module DeepType.
  Ltac2 Type rec mylist := [ Nil | One (unit option) | Cons| _,Cons_> (java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23

  Fail x with
    match x with
    | Nil, _ => ()
    | _,Nil
    endjava.lang.StringIndexOutOfBoundsException: Index 8 out of bounds for length 8
    | _, One None => ()
    end

  Fail
    match
    | Nil, _ => ()
    | , =>)
    | One Ltac2 exn ].
    | _, One None
    Ltac2  :
    endjava.lang.StringIndexOutOfBoundsException: Index 8 out of bounds for length 8

  Succeedlet ={contents :0}in
    match x with
     , _ >(
    check_eq_intbang r) 1.
    | One
    | _,One => ()
    | _, _ => ()
    end.

  Succeed Ltac2 test x :=
    match x with
    |Nil= (java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18
    |  heck_eq_intbang .
    | One  :   ; bint
    | _, One _ =java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
    | Record
    | _, Cons.
    end Ltac2 =
End     x

Module        "=
  Ltac2
    match x     match x with
    | Some  >java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16
    | Some None | None => None
    end.

  (* this checks that we didn't parse the pattern as "Some (Some (_ as v))" *)
  Eval ( (Some
End As.

Module Record.

  Ltac2 bang x := match x with { contents := v } => v end.

  Ltac2 Type exn ::= [ Regression_Test_Failure ].

  Ltac2 check_eq_int a b :=
    if Int.equal a b then () else Control.throw Regression_Test_Failure .

  Print Ltac2 bang.

  Ltac2 Eval
        let r := { contents := 0 } in
        r.(contents) := 1;
        check_eq_int (bang r) 1.

  Fail Ltac2 Eval
       let r := { contents := 0 } in
       r.(contents) := 1;
       check_eq_int (bang r) 0.

  Ltac2 Type foo := { a : int; b : int }.

  Ltac2 bar x := match x with { a := a } => a end.

End Record.

Module Atom.

  Fail Ltac2 mix_atoms x :=
    match x with
    | 0 | "" => false
    | _ => true
    end.

  Ltac2 match_int x :=
    match x with
    | 0 => false
    | _ => true
    end.
  Fail Ltac2 dummy : (int * int) -> _ := match_int.

  Ltac2 match_str x :=
    match x with
    | "" => false
    | _ => true
    end.
  Fail Ltac2 dummy : int -> _ := match_str.

End Atom.

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