Data.Stack

Abstract Stack data type

Documentation

data Stack a

Abstract Stack data type

Instances

Read a => Read (Stack a)

Methods

readsPrec :: Int -> ReadS (Stack a)

readList :: ReadS [Stack a]

readPrec :: ReadPrec (Stack a)

readListPrec :: ReadPrec [Stack a]

Show a => Show (Stack a)

Methods

showsPrec :: Int -> Stack a -> ShowS

show :: Stack a -> String

showList :: [Stack a] -> ShowS

stackNew :: Stack a

Create new Stack

stackIsEmpty :: Stack a -> Bool

Test if stack is empty

stackPush :: Stack a -> a -> Stack a

Push item onto Stack

stackPeek :: Stack a -> a

Pop most recently added item without removing from the Stack

stackPop :: Stack a -> (Stack a, a)

Pop most recently item from Stack

stackSize :: Stack a -> Int

Compute number of elements contained in the Stack