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Diffstat (limited to 'test-suite/bugs/opened/4803.v')
-rw-r--r-- | test-suite/bugs/opened/4803.v | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/test-suite/bugs/opened/4803.v b/test-suite/bugs/opened/4803.v new file mode 100644 index 00000000..4530548b --- /dev/null +++ b/test-suite/bugs/opened/4803.v @@ -0,0 +1,48 @@ +(* -*- coq-prog-args: ("-emacs" "-compat" "8.4") -*- *) +(*Suppose a user wants to declare a new list-like notation with support for singletons in both 8.4 and 8.5. If they use*) +Require Import Coq.Lists.List. +Require Import Coq.Vectors.Vector. +Import ListNotations. +Import VectorNotations. +Set Implicit Arguments. +Inductive mylist T := mynil | mycons (_ : T) (_ : mylist T). +Arguments mynil {_}, _. + +Delimit Scope mylist_scope with mylist. +Bind Scope mylist_scope with mylist. +Delimit Scope vector_scope with vector. + +Notation " [ ] " := mynil (format "[ ]") : mylist_scope. +Notation " [ x ] " := (mycons x mynil) : mylist_scope. +Notation " [ x ; .. ; y ] " := (mycons x .. (mycons y mynil) ..) : mylist_scope. + +(** All of these should work fine in -compat 8.4 mode, just as they do in Coq 8.4. There needs to be a way to specify notations above so that all of these [Check]s go through in both 8.4 and 8.5 *) +Check [ ]%mylist : mylist _. +Check [ ]%list : list _. +Check []%vector : Vector.t _ _. +Check [ _ ]%mylist : mylist _. +Check [ _ ]%list : list _. +Check [ _ ]%vector : Vector.t _ _. +Check [ _ ; _ ]%list : list _. +Check [ _ ; _ ]%vector : Vector.t _ _. +Check [ _ ; _ ]%mylist : mylist _. +Check [ _ ; _ ; _ ]%list : list _. +Check [ _ ; _ ; _ ]%vector : Vector.t _ _. +Check [ _ ; _ ; _ ]%mylist : mylist _. +Check [ _ ; _ ; _ ; _ ]%list : list _. +Check [ _ ; _ ; _ ; _ ]%vector : Vector.t _ _. +Check [ _ ; _ ; _ ; _ ]%mylist : mylist _. + +(** Now check that we can add and then remove notations from the parser *) +(* We should be able to stick some vernacular here to remove [] from the parser *) +Fail Remove Notation "[]". +Goal True. + (* This should not be a syntax error; before moving this file to closed, uncomment this line. *) + (* idtac; []. *) + constructor. +Qed. + +Check { _ : _ & _ }. +Reserved Infix "&" (at level 0). +Fail Remove Infix "&". +(* Check { _ : _ & _ }. *) |