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(* Check that "where" clause behaves as if given independently of the *)
(* definition (variant of bug #1132 submitted by Assia Mahboubi) *)
Fixpoint plus1 (n m:nat) {struct n} : nat :=
match n with
| O => m
| S p => S (p+m)
end
where "n + m" := (plus1 n m) : nat_scope.
(* Check behaviour wrt yet empty levels (see Stephane's bug #1850) *)
Parameter P : Type -> Type -> Type -> Type.
Notation "e |= t --> v" := (P e t v) (at level 100, t at level 54).
Check (nat |= nat --> nat).
(* Check that first non empty definition at an empty level can be of any
associativity *)
Definition marker := O.
Notation "x +1" := (S x) (at level 8, left associativity).
Reset marker.
Notation "x +1" := (S x) (at level 8, right associativity).
(* Check that empty levels (here 8 and 2 in pattern) are added in the
right order *)
Notation "' 'C_' G ( A )" := (A,G) (at level 8, G at level 2).
(* Check import of notations from within a section *)
Notation "+1 x" := (S x) (at level 25, x at level 9).
Section A. Require Import make_notation. End A.
(* Check use of "$" (see bug #1961) *)
Notation "$ x" := (id x) (at level 30).
Check ($ 5).
(* Check regression of bug #2087 *)
Notation "'exists' x , P" := (x, P)
(at level 200, x ident, right associativity, only parsing).
Definition foo P := let '(exists x, Q) := P in x = Q :> nat.
(* Check empty levels when extending binder_constr *)
Notation "'exists' x >= y , P" := (exists x, x >= y /\ P)%nat
(at level 200, x ident, right associativity, y at level 69).
(* This used to loop at some time before r12491 *)
Notation R x := (@pair _ _ x).
Check (fun x:nat*nat => match x with R x y => (x,y) end).
(* Check multi-tokens recursive notations *)
Local Notation "[ a # ; .. # ; b ]" := (a + .. (b + 0) ..).
Check [ 0 ].
Check [ 0 # ; 1 ].
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