haskell/parsec

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A monadic parser combinator library

Stars: 892
Forks: 99
Open beginner issues: 0
Indexed issues: 37

Dominant language: Haskell
License: No license data
Last GitHub push: Jun 9, 2026
Latest indexed: Sep 14, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: No beginner labels indexed
PR merge metrics: No merged PRs in 30d

Open All

37 open issues indexed

`notFollowedBy` and parsers which don't consume input. Open

pvp:major

haskell/parsec#8 · 3 comments · 2 reactions · 0 assignees · Indexed Sep 14, 2026
Token parser consumes newlines Open

haskell/parsec#24 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Re-publish & update old parsec manual Open

haskell/parsec#33 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Parsec.Expr Example Broken? Open

haskell/parsec#38 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
integer dosen't fail for leading white spaces Open

haskell/parsec#39 · 11 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
`decimal`, `hexadecimal`, and `octal` parsers should consume trailing whitespace Open

documentation enhancement

haskell/parsec#43 · 3 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
Bad error handling: unhelpful "unexpected" error message when parsing set of strings Open

haskell/parsec#52 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
identifiers in Text.Parsec.Language not polymorphic enough Open

haskell/parsec#55 · 9 comments · 4 reactions · 0 assignees · Indexed Sep 14, 2026
conflict between infix and prefix ops in `Text.Parser.Expr` Open

haskell/parsec#57 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
It's pretty hard to make a lexer using Data.Text Open

haskell/parsec#59 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
parser never returns Open

question

haskell/parsec#60 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Why does Parsec change the fixity of `<|>`? Open

pvp:major

haskell/parsec#61 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Derive a Data instance for more types Open

pvp:minor

haskell/parsec#65 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Expose ParsecT constructor or implement hoisting Open

haskell/parsec#67 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Microsoft Research has updated its pdf Open

question

haskell/parsec#69 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Alternative formulation of Stream Open

haskell/parsec#72 · 9 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
ByteString parser improvements Open

haskell/parsec#84 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Text.Parsec.Language.haskell incorrectly parses floating literal as Double Open

haskell/parsec#89 · 1 comment · 1 reaction · 0 assignees · Indexed Sep 14, 2026
Parsec returns additional, spurious error messages on parserFail Open

haskell/parsec#91 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
the name of `notFollowedBy` is not consistent with the semantics of the other parsers Open

haskell/parsec#92 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Token parsers don't support module names and qualified identifiers Open

haskell/parsec#93 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
`operator haskell` doesn't accept unicode symbols Open

haskell/parsec#97 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
javaStyle defined as case insensitive Open

haskell/parsec#99 · 0 comments · 2 reactions · 0 assignees · Indexed Sep 14, 2026
Export internals Open

haskell/parsec#119 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Documentation Error: <||> should be <|?> Open

haskell/parsec#120 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
"unexpected end of input, expecting end of input" Open

haskell/parsec#121 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Documentation regarding updatePosChar does not match the function's behaviour Open

haskell/parsec#129 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
tokenise comments Open

haskell/parsec#130 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
add a parameter to makeTokenParser to specify options for treating space by lexeme Open

haskell/parsec#131 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Which unfoldM is meant in "unfoldM uncons gives the [t] corresponding to the stream"? Open

haskell/parsec#144 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
How to handle include? Open

haskell/parsec#158 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Generate syntax highlighting files Open

haskell/parsec#166 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Parameterized enclosing for char and string literals Open

haskell/parsec#170 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Track consumed token count in ParserState (and ParseError) Open

pvp:major

haskell/parsec#175 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Haddock combinator 'many' is applied to a parser that accepts an empty string. Open

haskell/parsec#179 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
End of Line Parser Open

haskell/parsec#182 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Avoid Data.List.init and Data.List.last Open

haskell/parsec#194 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026

haskell/parsec

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