| Stack(3o) | OCamldoc | Stack(3o) |
Stack - Last-in first-out stacks.
Module Stack
Module Stack
: sig end
Last-in first-out stacks.
This module implements stacks (LIFOs), with in-place modification.
type 'a t
The type of stacks containing elements of type 'a .
exception Empty
Raised when Stack.pop or Stack.top is applied to an empty stack.
val create : unit -> 'a t
Return a new stack, initially empty.
val push : 'a -> 'a t -> unit
push x s adds the element x at the top of stack s .
val pop : 'a t -> 'a
pop s removes and returns the topmost element in stack s , or raises Stack.Empty if the stack is empty.
val top : 'a t -> 'a
top s returns the topmost element in stack s , or raises Stack.Empty if the stack is empty.
val clear : 'a t -> unit
Discard all elements from a stack.
val copy : 'a t -> 'a t
Return a copy of the given stack.
val is_empty : 'a t -> bool
Return true if the given stack is empty, false otherwise.
val length : 'a t -> int
Return the number of elements in a stack. Time complexity O(1)
val iter : ('a -> unit) -> 'a t -> unit
iter f s applies f in turn to all elements of s , from the element at the top of the stack to the element at the bottom of the stack. The stack itself is unchanged.
val fold : ('b -> 'a -> 'b) -> 'b -> 'a t -> 'b
fold f accu s is (f (... (f (f accu x1) x2) ...) xn) where x1 is the top of the stack, x2 the second element, and xn the bottom element. The stack is unchanged.
Since 4.03
| source: | 2019-01-25 |