Type of strings representing expressions, parameterized by the surrounding precedence level.

This is the return type of flip showsPrec.

Show a constructor.

Possible constructor names are:

• regular constructors (e.g., "Left");
• parenthesized infix constructors (e.g., "(:)");
• smart constructors, for abstract types (e.g., "Map.fromList").

Example with smart constructor

instance (Show k, Show v) => Show (Map k v) where
  showsPrec = flip precShows where
    precShows m = showCon "Map.fromList" @| Map.toList m

-- Example output:
-- > Map.fromList [(33, True), (55, False)]

Show a function application.

Show a function application.

This is an infix shorthand for showApp when the argument type is an instance of Show.

showF @| x = showApp showF (flip showsPrec x)

Show an applied infix operator with a given precedence.

Show an applied infix operator with a given precedence.

This is a shorthand for showInfix when the arguments types are instances of Show.

showInfix' op prec x y =
  showInfix op prec (flip showsPrec x) (flip showsPrec y)

Show an applied infix operator which is left associative (infixl). Use with care.

This combinator assumes that, if there is another infix operator to the left, it is either left associative with the same precedence, or it has a different precedence. An expression containing two operators at the same level with different associativities is ambiguous.

By default, prefer showInfix and showInfix'.

Show an applied infix operator which is left associative (infixl). Use with care, see showInfixl.

This is a shorthand for showInfixl when the arguments types are instances of Show.

By default, prefer showInfix and showInfix'.

Show an applied infix operator which is right associative (infixr). Use with care.

This combinator assumes that, if there is another infix operator to the right, it is either right associative with the same precedence, or it has a different precedence. An expression containing two operators at the same level with different associativities is ambiguous.

By default, prefer showInfix and showInfix'.

Example usage

showList :: Show a => [a] -> PrecShowS
showList [] = showCon "[]"
showList (x : xs) = showInfixr ":" 5 (flip showsPrec x) (showList xs)

-- Example output:
-- > 0 : 1 : 2 : 3 : []

Show an applied infix operator which is right associative (infixr). Use with care, see showInfixr.

This is a shorthand for showInfixr when the arguments types are instances of Show.

By default, prefer showInfix and showInfix'.

Strings representing a set of record fields separated by commas. They can be constructed using (.=.) and (@|), or using showField and appendFields.

Show a record. The first argument is the constructor name. The second represents the set of record fields.

Show a single record field: a field name and a value separated by '='.

Show a single record field: a field name and a value separated by '='.

This is an infix shorthand for showField when the value type is an instance of Show.

field .=. x   =   showField field (flip showsPrec x)

Empty set of record fields.

Separate two nonempty sets of record fields by a comma.

An infix synonym of appendFields.