Toml.Position

Description

This module provides the Position type for tracking locations in files while doing lexing and parsing for providing more useful error messages.

This module assumes 8 column wide tab stops.

Synopsis

Documentation

A position in a text file

Constructors

Position
Fields posIndex :: !Int code-point index (zero-based) posLine :: !Int line index (one-based) posColumn :: !Int column index (one-based)

Instances details

Read Position Source #	Default instance
Instance details Defined in Toml.Position Methods readsPrec :: Int -> ReadS Position # readList :: ReadS [Position] # readPrec :: ReadPrec Position # readListPrec :: ReadPrec [Position] #
Show Position Source #	Default instance
Instance details Defined in Toml.Position Methods showsPrec :: Int -> Position -> ShowS # show :: Position -> String # showList :: [Position] -> ShowS #
Eq Position Source #	Default instance
Instance details Defined in Toml.Position Methods (==) :: Position -> Position -> Bool # (/=) :: Position -> Position -> Bool #
Ord Position Source #	Default instance
Instance details Defined in Toml.Position Methods compare :: Position -> Position -> Ordering # (<) :: Position -> Position -> Bool # (<=) :: Position -> Position -> Bool # (>) :: Position -> Position -> Bool # (>=) :: Position -> Position -> Bool # max :: Position -> Position -> Position # min :: Position -> Position -> Position #

The initial Position for the start of a file

Adjust a file position given a single character handling newlines and tabs. All other characters are considered to fill exactly one column.