Data.Express.Name

Defines the Name type class.

Documentation

class Name a where

If we were to come up with a variable name for the given type what name would it be?

An instance for a given type Ty is simply given by:

instance Name Ty where name _ = "x"

Examples:

> name (undefined :: Int)
"x"

> name (undefined :: Bool)
"p"

> name (undefined :: [Int])
"xs"

This is then used to generate an infinite list of variable names:

> names (undefined :: Int)
["x", "y", "z", "x'", "y'", "z'", "x''", "y''", "z''", ...]

> names (undefined :: Bool)
["p", "q", "r", "p'", "q'", "r'", "p''", "q''", "r''", ...]

> names (undefined :: [Int])
["xs", "ys", "zs", "xs'", "ys'", "zs'", "xs''", "ys''", ...]

Minimal complete definition

Nothing

Methods

name :: a -> String

O(1).

Returns a name for a variable of the given argument's type.

> name (undefined :: Int)
"x"

> name (undefined :: [Bool])
"ps"

> name (undefined :: [Maybe Integer])
"mxs"

The default definition is:

name _ = "x"

Instances

Name Int16

Defined in Data.Express.Name

Methods

name :: Int16 -> String

Name Int32

Defined in Data.Express.Name

Methods

name :: Int32 -> String

Name Int64

Defined in Data.Express.Name

Methods

name :: Int64 -> String

Name Int8

Defined in Data.Express.Name

Methods

name :: Int8 -> String

Name GeneralCategory

Defined in Data.Express.Name

Methods

name :: GeneralCategory -> String

Name Word16

Defined in Data.Express.Name

Methods

name :: Word16 -> String

Name Word32

Defined in Data.Express.Name

Methods

name :: Word32 -> String

Name Word64

Defined in Data.Express.Name

Methods

name :: Word64 -> String

Name Word8

Defined in Data.Express.Name

Methods

name :: Word8 -> String

Name Ordering

name (undefined :: Ordering) = "o"
names (undefined :: Ordering) = ["o", "p", "q", "o'", ...]

Defined in Data.Express.Name

Methods

name :: Ordering -> String

Name Integer

name (undefined :: Integer) = "x"
names (undefined :: Integer) = ["x", "y", "z", "x'", ...]

Defined in Data.Express.Name

Methods

name :: Integer -> String

Name ()

name (undefined :: ()) = "u"
names (undefined :: ()) = ["u", "v", "w", "u'", "v'", ...]

Defined in Data.Express.Name

Methods

name :: () -> String

Name Bool

name (undefined :: Bool) = "p"
names (undefined :: Bool) = ["p", "q", "r", "p'", "q'", ...]

Defined in Data.Express.Name

Methods

name :: Bool -> String

Name Char

name (undefined :: Char) = "c"
names (undefined :: Char) = ["c", "d", "e", "c'", "d'", ...]

Defined in Data.Express.Name

Methods

name :: Char -> String

Name Double

name (undefined :: Double) = "x"
names (undefined :: Double) = ["x", "y", "z", "x'", ...]

Defined in Data.Express.Name

Methods

name :: Double -> String

Name Float

name (undefined :: Float) = "x"
names (undefined :: Float) = ["x", "y", "z", "x'", ...]

Defined in Data.Express.Name

Methods

name :: Float -> String

Name Int

name (undefined :: Int) = "x"
names (undefined :: Int) = ["x", "y", "z", "x'", "y'", ...]

Defined in Data.Express.Name

Methods

name :: Int -> String

Name Word

Defined in Data.Express.Name

Methods

name :: Word -> String

Name (Complex a)

name (undefined :: Complex) = "x"
names (undefined :: Complex) = ["x", "y", "z", "x'", ...]

Defined in Data.Express.Name

Methods

name :: Complex a -> String

Name (Ratio a)

name (undefined :: Rational) = "q"
names (undefined :: Rational) = ["q", "r", "s", "q'", ...]

Defined in Data.Express.Name

Methods

name :: Ratio a -> String

Name a => Name (Maybe a)

names (undefined :: Maybe Int) = ["mx", "mx1", "mx2", ...]
nemes (undefined :: Maybe Bool) = ["mp", "mp1", "mp2", ...]

Defined in Data.Express.Name

Methods

name :: Maybe a -> String

Name a => Name [a]

names (undefined :: [Int]) = ["xs", "ys", "zs", "xs'", ...]
names (undefined :: [Bool]) = ["ps", "qs", "rs", "ps'", ...]

Defined in Data.Express.Name

Methods

name :: [a] -> String

(Name a, Name b) => Name (Either a b)

names (undefined :: Either Int Int) = ["exy", "exy1", ...]
names (undefined :: Either Int Bool) = ["exp", "exp1", ...]

Defined in Data.Express.Name

Methods

name :: Either a b -> String

(Name a, Name b) => Name (a, b)

names (undefined :: (Int,Int)) = ["xy", "zw", "xy'", ...]
names (undefined :: (Bool,Bool)) = ["pq", "rs", "pq'", ...]

Defined in Data.Express.Name

Methods

name :: (a, b) -> String

Name (a -> b)

names (undefined :: ()->()) = ["f", "g", "h", "f'", ...]
names (undefined :: Int->Int) = ["f", "g", "h", ...]

Defined in Data.Express.Name

Methods

name :: (a -> b) -> String

(Name a, Name b, Name c) => Name (a, b, c)

names (undefined :: (Int,Int,Int)) = ["xyz","uvw", ...]
names (undefined :: (Int,Bool,Char)) = ["xpc", "xpc1", ...]

Defined in Data.Express.Name

Methods

name :: (a, b, c) -> String

(Name a, Name b, Name c, Name d) => Name (a, b, c, d)

names (undefined :: ((),(),(),())) = ["uuuu", "uuuu1", ...]
names (undefined :: (Int,Int,Int,Int)) = ["xxxx", ...]

Defined in Data.Express.Name

Methods

name :: (a, b, c, d) -> String

(Name a, Name b, Name c, Name d, Name e) => Name (a, b, c, d, e)

Defined in Data.Express.Name

Methods

name :: (a, b, c, d, e) -> String

(Name a, Name b, Name c, Name d, Name e, Name f) => Name (a, b, c, d, e, f)

Defined in Data.Express.Name

Methods

name :: (a, b, c, d, e, f) -> String

(Name a, Name b, Name c, Name d, Name e, Name f, Name g) => Name (a, b, c, d, e, f, g)

Defined in Data.Express.Name

Methods

name :: (a, b, c, d, e, f, g) -> String

(Name a, Name b, Name c, Name d, Name e, Name f, Name g, Name h) => Name (a, b, c, d, e, f, g, h)

Defined in Data.Express.Name

Methods

name :: (a, b, c, d, e, f, g, h) -> String

(Name a, Name b, Name c, Name d, Name e, Name f, Name g, Name h, Name i) => Name (a, b, c, d, e, f, g, h, i)

Defined in Data.Express.Name

Methods

name :: (a, b, c, d, e, f, g, h, i) -> String

(Name a, Name b, Name c, Name d, Name e, Name f, Name g, Name h, Name i, Name j) => Name (a, b, c, d, e, f, g, h, i, j)

Defined in Data.Express.Name

Methods

name :: (a, b, c, d, e, f, g, h, i, j) -> String

(Name a, Name b, Name c, Name d, Name e, Name f, Name g, Name h, Name i, Name j, Name k) => Name (a, b, c, d, e, f, g, h, i, j, k)

Defined in Data.Express.Name

Methods

name :: (a, b, c, d, e, f, g, h, i, j, k) -> String

(Name a, Name b, Name c, Name d, Name e, Name f, Name g, Name h, Name i, Name j, Name k, Name l) => Name (a, b, c, d, e, f, g, h, i, j, k, l)

Defined in Data.Express.Name

Methods

name :: (a, b, c, d, e, f, g, h, i, j, k, l) -> String

names :: Name a => a -> [String]

Returns na infinite list of variable names from the given type: the result of variableNamesFromTemplate after name.

> names (undefined :: Int)
["x", "y", "z", "x'", "y'", "z'", "x''", "y''", "z''", ...]

> names (undefined :: Bool)
["p", "q", "r", "p'", "q'", "r'", "p''", "q''", "r''", ...]

> names (undefined :: [Int])
["xs", "ys", "zs", "xs'", "ys'", "zs'", "xs''", "ys''", ...]

variableNamesFromTemplate :: String -> [String]

Returns an infinite list of variable names based on the given template.

> variableNamesFromTemplate "x"
["x", "y", "z", "x'", "y'", ...]

> variableNamesFromTemplate "p"
["p", "q", "r", "p'", "q'", ...]

> variableNamesFromTemplate "xy"
["xy", "zw", "xy'", "zw'", "xy''", ...]