Hectoparsec.Debug

Contents

Description

Combinators and functions for debugging ParserT.

Synopsis

module Debug.Trace
pdbg :: (Stream s, Show (Token s), Show (Chunk s), Show e, Show l, Show a) => String -> ParserT s e l m a -> ParserT s e l m a
(<??>) :: (Stream s, Show (Token s), Show (Chunk s), Show e, Show l, Show a) => ParserT s e l m a -> String -> ParserT s e l m a
parseTest :: (Show (Token s), Show (Chunk s), Show e, Show l, Show a) => Parser s e l a -> s -> IO ()
fmtP :: (Show (Token s), Show (Chunk s), Show e, Show l, Show a) => Either (ParseError s e l) a -> String
fmtE :: (Show (Token s), Show (Chunk s), Show e, Show l) => ParseError s e l -> String

Re-exports

Debug combinators

pdbg :: (Stream s, Show (Token s), Show (Chunk s), Show e, Show l, Show a) => String -> ParserT s e l m a -> ParserT s e l m a Source #

Wraps a parser with trace for debugging, showing the parser state before and after the parser.

A parser can either consume or not consume tokens, and it can succeed with a parsed value or fail with an error.

(<??>) :: (Stream s, Show (Token s), Show (Chunk s), Show e, Show l, Show a) => ParserT s e l m a -> String -> ParserT s e l m a infix 0 Source #

Infix version of flip pdbg.

parseTest :: (Show (Token s), Show (Chunk s), Show e, Show l, Show a) => Parser s e l a -> s -> IO () Source #

Runs a parser and prints the output or error to the console.

Formats the result of running a parser for debugging purposes.

Formats the errors from a parser for debugging purposes.