Language.Futhark.Parser.Lexer.Wrapper

Utility definitions used by the lexer. None of the default Alex "wrappers" are precisely what we need. The code here is highly minimalistic. Lexers should not be complicated!

Documentation

initialLexerState :: Pos -> ByteString -> AlexInput

type AlexInput = (Pos, Char, ByteString, Int64)

The input type. Contains:

1. current position
2. previous char
3. current input string
4. bytes consumed so far

alexInputPrevChar :: AlexInput -> Char

data LexerError

Constructors

LexerError Loc Text

Instances

Show LexerError

Defined in Language.Futhark.Parser.Lexer.Wrapper

Methods

showsPrec :: Int -> LexerError -> ShowS

show :: LexerError -> String

showList :: [LexerError] -> ShowS

alexGetByte :: AlexInput -> Maybe (Byte, AlexInput)

alexGetPos :: AlexInput -> Pos