Toml.Position

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.

Documentation

data Position

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

Read Position

Default instance

Defined in Toml.Position

Methods

readsPrec :: Int -> ReadS Position

readList :: ReadS [Position]

readPrec :: ReadPrec Position

readListPrec :: ReadPrec [Position]

Show Position

Default instance

Defined in Toml.Position

Methods

showsPrec :: Int -> Position -> ShowS

show :: Position -> String

showList :: [Position] -> ShowS

Eq Position

Default instance

Defined in Toml.Position

Methods

(==) :: Position -> Position -> Bool

(/=) :: Position -> Position -> Bool

Ord Position

Default instance

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

startPos :: Position

The initial Position for the start of a file

move :: Char -> Position -> Position

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