System.IO.Menu

Documentation

data Menu a

Defines a Menu

Constructors

Menu

Fields

• title :: String

  The menu title

• items :: Map Char (Item a)

  The items in the menu

Instances

Show (Menu a)

Methods

showsPrec :: Int -> Menu a -> ShowS

show :: Menu a -> String

showList :: [Menu a] -> ShowS

data Item a

Defines a Menu item

Constructors

Item

Fields

• description :: String

  The description

• action :: IO a

Instances

Show (Item a)

Methods

showsPrec :: Int -> Item a -> ShowS

show :: Item a -> String

showList :: [Item a] -> ShowS

build

Arguments

:: String

The menu title

-> [(Char, Item a)]

A list of tuples containing a character (must be upper case) and its corresponding Item

-> Menu a

Builds a Menu from a list.

execute

Arguments

:: Menu a

The Menu

-> IO a

Prompts the user to select an option from a Menu and returns the resulting value

addItem

Arguments

:: Char

The character (must be upper case) of the Item to be added to the menu

-> Item a

The Item to be added

-> Menu a

The Menu being modified

-> Menu a

Adds an Item to a Menu, returning the resulting Menu