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Diffstat (limited to 'clib/cStack.ml')
-rw-r--r-- | clib/cStack.ml | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/clib/cStack.ml b/clib/cStack.ml new file mode 100644 index 00000000..b86b0024 --- /dev/null +++ b/clib/cStack.ml @@ -0,0 +1,44 @@ +(************************************************************************) +(* * The Coq Proof Assistant / The Coq Development Team *) +(* v * INRIA, CNRS and contributors - Copyright 1999-2018 *) +(* <O___,, * (see CREDITS file for the list of authors) *) +(* \VV/ **************************************************************) +(* // * This file is distributed under the terms of the *) +(* * GNU Lesser General Public License Version 2.1 *) +(* * (see LICENSE file for the text of the license) *) +(************************************************************************) + +exception Empty = Stack.Empty + +type 'a t = { + mutable stack : 'a list; +} + +let create () = { stack = [] } + +let push x s = s.stack <- x :: s.stack + +let pop = function + | { stack = [] } -> raise Stack.Empty + | { stack = x::xs } as s -> s.stack <- xs; x + +let top = function + | { stack = [] } -> raise Stack.Empty + | { stack = x::_ } -> x + +let to_list { stack = s } = s + +let find f s = List.find f (to_list s) + +let find_map f s = CList.find_map f s.stack + +let fold_until f accu s = CList.fold_left_until f accu s.stack + +let is_empty { stack = s } = s = [] + +let iter f { stack = s } = List.iter f s + +let clear s = s.stack <- [] + +let length { stack = s } = List.length s + |