attoparsec

Problem with incomplete input when using Attoparsec

由 江枫思渺然 提交于 2019-12-01 04:10:18
I am converting some functioning Haskell code that uses Parsec to instead use Attoparsec in the hope of getting better performance. I have made the changes and everything compiles but my parser does not work correctly. I am parsing a file that consists of various record types, one per line. Each of my individual functions for parsing a record or comment works correctly but when I try to write a function to compile a sequence of records the parser always returns a partial result because it is expecting more input. These are the two main variations that I've tried. Both have the same problem.

Problem with incomplete input when using Attoparsec

由 空扰寡人 提交于 2019-12-01 01:36:39
问题 I am converting some functioning Haskell code that uses Parsec to instead use Attoparsec in the hope of getting better performance. I have made the changes and everything compiles but my parser does not work correctly. I am parsing a file that consists of various record types, one per line. Each of my individual functions for parsing a record or comment works correctly but when I try to write a function to compile a sequence of records the parser always returns a partial result because it is

Parsing and the use of GADTs

由 ♀尐吖头ヾ 提交于 2019-11-30 18:45:34
问题 I've ran into a problem while writing a parser. Specifically, I want to be return values of different types. For example, I have two different data types FA and PA to represent two different lipid classes - data FA = ClassLevelFA IntegerMass | FA CarbonChain deriving (Show, Eq, Ord) data PA = ClassLevelPA IntegerMass | CombinedRadylsPA TwoCombinedRadyls | UnknownSnPA Radyl Radyl | KnownSnPA Radyl Radyl deriving (Show, Eq, Ord) Using attoparsec, I have built parsers to parse lipid shorthand
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