Data.Syntax.Char

Common combinators that work with sequences of chars.

Documentation

class (Syntax syn seq, Element seq ~ Char) => SyntaxChar syn seq where

Syntax constrainted to sequences of chars.

Note: methods of this class do not have default implementations (for now), because their code is quite ugly and already written in most parser libraries.

Methods

decimal :: Integral a => syn a

An unsigned decimal number.

hexadecimal :: (Integral a, Bits a) => syn a

An unsigned hexadecimal number.

realFloat :: RealFloat a => syn a

A signed real number.

scientific :: syn Scientific

A scientific number.

Instances

SyntaxChar syn seq => SyntaxChar (Indent syn) seq

type SyntaxText syn = SyntaxChar syn Text

An useful synonym for SyntaxChars with Text sequences.

signed :: (Real a, SyntaxChar syn seq) => syn a -> syn a

A number with an optional leading + or - sign character.

spaces :: SyntaxChar syn seq => syn ()

Accepts zero or more spaces. Generates a single space.

spaces_ :: SyntaxChar syn seq => syn ()

Accepts zero or more spaces. Generates no output.

spaces1 :: SyntaxChar syn seq => syn ()

Accepts one or more spaces. Generates a single space.

endOfLine :: SyntaxChar syn seq => syn ()

Accepts a single newline. Generates a newline.

digitDec :: SyntaxChar syn seq => syn Int

A decimal digit.

digitOct :: SyntaxChar syn seq => syn Int

An octal digit.

digitHex :: SyntaxChar syn seq => syn Int

A hex digit.