fastparser alternatives and similar packages
Based on the "Parsing" category.
Alternatively, view fastparser alternatives based on common mentions on social networks and blogs.
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Earley
Parsing all context-free grammars using Earley's algorithm in Haskell. -
trifecta
Parser combinators with highlighting, slicing, layout, literate comments, Clang-style diagnostics and the kitchen sink -
parser-combinators
Lightweight package providing commonly useful parser combinators -
replace-megaparsec
Stream editing with Haskell Megaparsec parsers -
descriptive
Self-describing consumers/parsers; forms, cmd-line args, JSON, etc. -
scanner
Fast non-backtracking incremental combinator parsing for bytestrings -
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incremental-parser
Haskell parsing combinator liibrary that can be fed the input and emit the parsed output incrementally -
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data-stm32
ARM SVD and CubeMX XML parser and pretty printer for STM32 family -
parsec-free
Parsec API encoded as a deeply-embedded DSL, for debugging and analysis -
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replace-attoparsec
Stream editing with Haskell Attoparsec parsers -
hsemail
Haskell Parsec parsers for the syntax defined in RFC2821 and 2822 -
parsec-parsers
Orphan instances so you can use `parsers` with `parsec`. -
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matrix-market-attoparsec
Attoparsec parsers for the NIST Matrix Market format -
record-syntax
A library for parsing and processing the Haskell syntax sprinkled with anonymous records -
attoparsec-parsec
An Attoparsec compatibility layer for Parsec -
attoparsec-expr
Port of parsec's expression parser to attoparsec. -
streaming-binary
Incremental serialization and deserialization of Haskell values. -
fuzzy-dates
Automatically detect and parse dates in many different formats -
antlrc
Haskell binding to the ANTLR parser generator C runtime library http://www.antlr.org/wiki/display/ANTLR3/ANTLR3+Code+Generation+-+C
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Popular Comparisons
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parsecvsmegaparsec
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megaparsecvsattoparsec
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attoparsec-parsecvsmegaparsec
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megaparsecvsattoparsec-parsec
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yoctoparsecvsLParse
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README
A very simple, backtracking, fast parser combinator library.
It is measurably faster than attoparsec (36% in this use case), but only works on strict ByteString, lacks many helper functions, and is not resumable.
It also should consume a tiny bit less memory for equivalent operations.
When NOT to use fastparser
- When performance is not the most pressing concern.
- When you need to parse anything else but strict
ByteString. - When you need to use a battle-tested library. While very simple, and in constant use by me, this package is still quite experimental.
- When you need to parse large inputs that are not easily cut into many smaller pieces that can be parsed independently.
How to use fastparser
fastparser works well with small pieces, such as individual log file lines. It is recommended to use it with a coroutine library (such as conduit or pipe), so that the input could be incrementaly consumed, cut into individual records, all of which would end up parsed independently.
One such setup, with the conduit ecosystem, would look like:
sourceFile "/tmp/foo" .| Data.Conduit.Binary.lines .| CL.map (parseOnly parser) .| ...
Other than that, fastparser is fairly close to any other parser combinators library.