const -is:exact -is:exact -is:exact

const x is a unary function which evaluates to x for all inputs.

>>> const 42 "hello"
42

>>> map (const 42) [0..3]
[42,42,42,42]

The Const functor.

Gets the field labels of a constructor. The list of labels is returned in the same order as they were given in the original constructor declaration.

Gets the fixity of a constructor

Gets the index of a constructor (algebraic datatypes only)

Gets the public presentation of constructors

Gets the datatype of a constructor

Representation of constructors. Note that equality on constructors with different types may not work -- i.e. the constructors for False and Nothing may compare equal.

Public representation of constructors

The kind of constraints, like Show a

Class for datatypes that represent data constructors

Gets the constructors of an algebraic datatype

Build a term skeleton

Build a term and use a generic function for subterms

Monadic variation on fromConstrB

Gets the constructor for an index (algebraic datatypes only)

Gets the maximum constructor index of an algebraic datatype