midi-0.1.4: Handling of MIDI messages and files Source code Contents Index

Sound.MIDI.Parser.Report

Description

Definition of a datatype that reports on the success of a parser.

Synopsis

data T a = Cons { warnings :: [UserMessage] result :: Either UserMessage a } type UserMessage = String

Documentation

data T a Source

This datatype is the result of a parser. First it stores a sequence of warnings. Warnings are for corruptions of the input which can be fixed. After encountering a series of warnings, there is finally an end, either a successful one, with the result as (Right result) or an eventual non-fixable problem indicated by (Left errorMessage). Constructors Cons warnings :: [UserMessage] result :: Either UserMessage a Instances Eq a => Eq (T a) Show a => Show (T a)

type UserMessage = String Source

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