GroteTrap-0.5.2: Parser and selection library for expression languages.

Safe HaskellSafe




The Unparse type class and its ParseTree instance, as well as some text manipulation.


Class Unparse

class Unparse p where Source #

Types that are unparsable. Unparsing is like prettyprinting, except that instead of pretty source the original source code is retrieved. This means unparsing is only possible for values that were the result of an earlier parse.

Minimal complete definition



unparse :: p -> String Source #

Text utility functions

merge :: [String] -> String Source #

Merge folds many strings over each other.

over :: String -> String -> String Source #

over upper lower places upper over lower. The resulting string has the same characters as upper does, except where upper contains spaces; at those positions, the character from lower shows. If lower is longer than upper, upper is padded with enough spaces to show all rest of lower.