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boostorg/spirit_x4

A modern, header-only PEG parser combinator library for C++23

9 good first / help-wanted issues · C++ · last activity Mar 6, 2026

36 stars 3 forks 36 watchers C++ Boost Software License 1.0
boost c-plus-plus cpp cpp23 parser-combinators peg peg-parser
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9 Open Issues Need Help Last updated: Mar 6, 2026

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Invalid real numbers should be rejected by real parsers 3 months ago
bug good first issue help wanted tests needed
boostorg/spirit_x4
36

A modern, header-only PEG parser combinator library for C++23

C++
#boost#c-plus-plus#cpp#cpp23#parser-combinators#peg#peg-parser
X3 -> X4 transition about 1 year ago
bug documentation enhancement help wanted CI
boostorg/spirit_x4
36

A modern, header-only PEG parser combinator library for C++23

C++
#boost#c-plus-plus#cpp#cpp23#parser-combinators#peg#peg-parser
The domain of integral bounds given to `repeat_directive` is underspecified about 1 year ago
documentation enhancement good first issue help wanted
boostorg/spirit_x4
36

A modern, header-only PEG parser combinator library for C++23

C++
#boost#c-plus-plus#cpp#cpp23#parser-combinators#peg#peg-parser
boolean parser for unicode char type is not implemented about 1 year ago
enhancement good first issue help wanted wontfix-X3
boostorg/spirit_x4
36

A modern, header-only PEG parser combinator library for C++23

C++
#boost#c-plus-plus#cpp#cpp23#parser-combinators#peg#peg-parser
`char_(from, to)` and `char_("set")` should reject invalid code units about 1 year ago
bug help wanted tests needed
boostorg/spirit_x4
36

A modern, header-only PEG parser combinator library for C++23

C++
#boost#c-plus-plus#cpp#cpp23#parser-combinators#peg#peg-parser
[X3] The absence of `lazy` should be documented about 1 year ago
documentation help wanted
boostorg/spirit_x4
36

A modern, header-only PEG parser combinator library for C++23

C++
#boost#c-plus-plus#cpp#cpp23#parser-combinators#peg#peg-parser
[X3] Include guards should be guarded by `#ifndef` about 1 year ago
enhancement good first issue help wanted
boostorg/spirit_x4
36

A modern, header-only PEG parser combinator library for C++23

C++
#boost#c-plus-plus#cpp#cpp23#parser-combinators#peg#peg-parser
[X3] Global shadowing warnings about 1 year ago
enhancement good first issue help wanted
boostorg/spirit_x4
36

A modern, header-only PEG parser combinator library for C++23

C++
#boost#c-plus-plus#cpp#cpp23#parser-combinators#peg#peg-parser
X3: Optional parser should fire a static assert for non-optional attributes about 1 year ago
enhancement help wanted
boostorg/spirit_x4
36

A modern, header-only PEG parser combinator library for C++23

C++
#boost#c-plus-plus#cpp#cpp23#parser-combinators#peg#peg-parser