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jank-lang/jank

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jank is the native Clojure dialect with seamless C++ interop.

Is jank-lang/jank beginner-friendly?

In the last 30 days, jank-lang/jank merged 18 of 26 pull requests from outside contributors, and its maintainers usually reply within 1 day. 4 beginner-friendly issues are open now.

Stars
3.3k
Forks
132
Open beginner issues
4
Indexed issues
129
Avg merge
11h 26m
Merged PRs (30d)
44
Dominant language
C++
License
MPL-2.0
Last GitHub push
Oct 6, 2026
Latest indexed
Oct 6, 2026
Contributing guide
Code of conduct
Beginner labels
help wanted

How to contribute to jank-lang/jank

  1. Read the contributing guide first: it says how the maintainers want changes proposed, tested and reviewed.
  2. Read its code of conduct: it covers issues and pull requests as well as chat.
  3. Your contributions will be published under the project's MPL-2.0 license.
  4. Pick one of the 4 open beginner-friendly issues below and comment that you want to work on it before you start.
Beginner friendly Everything
Open All

Issues somebody may already be working on are listed last. List everything by date

  • clojure.string/split discards trailing empty strings with limit -1
    Open
    • Is something wrong?

    Difficulty 2/5 1-3 hours Newbie friendliness 85/100

    jank-lang/jank#1110 · 1 comment ·

    Maintainers usually reply within 1 day

  • Syntax quote should not quote method and field calls
    Open
    • Is something wrong?
    category:compiler

    Difficulty 3/5 1-2 days Newbie friendliness 68/100

    jank-lang/jank#1108 ·

    Maintainers usually reply within 1 day

  • Add nREPL server test suite
    Open
    • Is something wrong?
    category:tooling

    Difficulty 4/5 3-5 days Newbie friendliness 48/100

    jank-lang/jank#1104 ·

    Maintainers usually reply within 1 day

  • bencode map writer does not follow spec
    Open
    • Is something wrong?
    category:tooling

    Difficulty 2/5 1-3 hours Newbie friendliness 62/100

    jank-lang/jank#1088 ·

    Maintainers usually reply within 1 day

  • Show source variable names in debugger
    Open
    • Is something wrong?
    category:compiler category:tooling

    Difficulty 5/5 Over a week Newbie friendliness 15/100

    jank-lang/jank#1084 ·

    Maintainers usually reply within 1 day

  • Function templates without AOT-compiled body cannot be used
    Open
    • Is something wrong?
    category:compiler

    Difficulty 4/5 3-5 days Newbie friendliness 22/100

    jank-lang/jank#1082 ·

    Maintainers usually reply within 1 day

  • Support aggregate initialization with union members
    Open
    • Is something wrong?
    category:compiler

    Difficulty 4/5 3-5 days Newbie friendliness 32/100

    jank-lang/jank#1081 ·

    Maintainers usually reply within 1 day

  • jank fails casting a vector of reals to `std::vector<double>`
    Open
    • Is something wrong?
    category:clang category:compiler

    Difficulty 4/5 3-5 days Newbie friendliness 25/100

    jank-lang/jank#1071 · 1 comment ·

    Maintainers usually reply within 1 day

  • Implement `cpp/struct`
    Open
    • Is something wrong?
    category:compiler

    Difficulty 5/5 Over a week Newbie friendliness 25/100

    jank-lang/jank#1069 ·

    Maintainers usually reply within 1 day

  • Implement `cpp/fn`
    Open
    • Is something wrong?
    category:compiler

    Difficulty 4/5 3-5 days Newbie friendliness 25/100

    jank-lang/jank#1068 ·

    Maintainers usually reply within 1 day

  • Vector constants collide across namespaces by hash
    Open
    • Is something wrong?
    category:runtime

    Difficulty 4/5 3-5 days Newbie friendliness 35/100

    jank-lang/jank#1062 ·

    Maintainers usually reply within 1 day

  • `cpp/delete` in tail position results in bad codegen
    Open
    • Is something wrong?
    category:compiler

    Difficulty 3/5 1-2 days Newbie friendliness 40/100

    jank-lang/jank#1061 ·

    Maintainers usually reply within 1 day

  • jank's `=` is more lenient with types than Clojure JVM
    Open
    • Is something wrong?
    category:runtime

    Difficulty 4/5 3-5 days Newbie friendliness 40/100

    jank-lang/jank#1060 ·

    Maintainers usually reply within 1 day

  • `cpp/raw` statics are duplicated per jank fn
    Open
    • Is something wrong?
    category:clang category:documentation

    Difficulty 4/5 3-5 days Newbie friendliness 30/100

    jank-lang/jank#1059 · 1 comment ·

    Maintainers usually reply within 1 day

  • Add native array aggregate initialization support
    Open
    • Is something wrong?
    category:compiler

    Difficulty 4/5 3-5 days Newbie friendliness 35/100

    jank-lang/jank#1057 ·

    Maintainers usually reply within 1 day

  • Switch to versioned jank releases
    Open
    • Is something wrong?
    category:distribution

    Difficulty 5/5 Over a week Newbie friendliness 22/100

    jank-lang/jank#1056 ·

    Maintainers usually reply within 1 day

  • Add `cpp/decltype` special form
    Open
    • Is something wrong?
    category:compiler

    Difficulty 4/5 3-5 days Newbie friendliness 35/100

    jank-lang/jank#1055 ·

    Maintainers usually reply within 1 day

  • Add `cpp/sizeof` special form
    Open
    • Is something wrong?
    category:compiler

    Difficulty 4/5 3-5 days Newbie friendliness 50/100

    jank-lang/jank#1054 ·

    Maintainers usually reply within 1 day

  • Expand C API with error handling and documentation
    Open
    • Is something wrong?
    category:documentation category:runtime

    Difficulty 4/5 3-5 days Newbie friendliness 32/100

    jank-lang/jank#1053 ·

    Maintainers usually reply within 1 day

  • Using `cpp/=` on a global instead mutates a copy
    Open
    • Is something wrong?
    category:compiler

    Difficulty 3/5 1-2 days Newbie friendliness 45/100

    jank-lang/jank#1050 ·

    Maintainers usually reply within 1 day

  • `if` with different native types can result in ambiguous assignment
    Open
    • Is something wrong?
    category:compiler

    Difficulty 4/5 3-5 days Newbie friendliness 30/100

    jank-lang/jank#1049 ·

    Maintainers usually reply within 1 day

  • `std::function` and pointer-to-fn are not callable directly by name
    Open
    • Is something wrong?
    category:compiler

    Difficulty 3/5 1-2 days Newbie friendliness 55/100

    jank-lang/jank#1048 ·

    Maintainers usually reply within 1 day

  • `cpp/NULL` cannot convert to pointers
    Open
    • Is something wrong?
    category:compiler

    Difficulty 3/5 1-2 days Newbie friendliness 35/100

    jank-lang/jank#1046 ·

    Maintainers usually reply within 1 day

  • Unable to cast `nullptr` to an array type
    Open
    • Is something wrong?
    category:compiler

    Difficulty 4/5 3-5 days Newbie friendliness 42/100

    jank-lang/jank#1041 ·

    Maintainers usually reply within 1 day

  • `nullptr` doesn't implicitly cast to array type
    Open
    • Is something wrong?
    category:compiler

    Difficulty 3/5 1-2 days Newbie friendliness 52/100

    jank-lang/jank#1040 ·

    Maintainers usually reply within 1 day

  • Unresolved symbol in `case` branch has incorrect error
    Open
    • Is something wrong?
    category:compiler

    Difficulty 3/5 1-2 days Newbie friendliness 52/100

    jank-lang/jank#1039 ·

    Maintainers usually reply within 1 day

  • Show the type of "this value is not callable"
    Open
    • Is something wrong?
    category:compiler

    Difficulty 3/5 1-2 days Newbie friendliness 25/100

    jank-lang/jank#1038 ·

    Maintainers usually reply within 1 day

  • Calls to `consteval` fns cannot have arguments lifted
    Open
    • Is something wrong?
    category:compiler

    Difficulty 4/5 3-5 days Newbie friendliness 25/100

    jank-lang/jank#1037 ·

    Maintainers usually reply within 1 day

  • Support `f32` and `f64` suffix for floats and `i32` and `i64` and such for integers
    Open
    • Is something wrong?
    category:compiler

    Difficulty 4/5 3-5 days Newbie friendliness 35/100

    jank-lang/jank#1036 ·

    Maintainers usually reply within 1 day

  • Consider using `[]` for C++ DSL, so it's more malli-like and clearly data
    Open
    • Is something wrong?
    category:compiler

    Difficulty 5/5 Over a week Newbie friendliness 12/100

    jank-lang/jank#1035 ·

    Maintainers usually reply within 1 day

  • Warn in lein-jank if bb, CC, or CXX is not under the standard binds
    Open
    • Is something wrong?
    category:tooling

    Difficulty 2/5 1-3 hours Newbie friendliness 62/100

    jank-lang/jank#1034 ·

    Maintainers usually reply within 1 day

  • `cpp/new` struct aggregate init with trait conversion doesn't codegen trait conversions
    Open
    • Is something wrong?
    category:compiler

    Difficulty 3/5 1-2 days Newbie friendliness 42/100

    jank-lang/jank#1033 ·

    Maintainers usually reply within 1 day

  • Add an e2e test for expired PCH rebuilding
    Open
    • Is something wrong?
    category:runtime

    Difficulty 4/5 3-5 days Newbie friendliness 25/100

    jank-lang/jank#1032 ·

    Maintainers usually reply within 1 day

  • Allow trait conversion across numeric types
    Open
    • Is something wrong?
    category:compiler

    Difficulty 5/5 Over a week Newbie friendliness 12/100

    jank-lang/jank#1030 ·

    Maintainers usually reply within 1 day

  • Move `error_ref` into `exception_info`
    Open
    • Is something wrong?
    category:runtime

    Difficulty 4/5 3-5 days Newbie friendliness 28/100

    jank-lang/jank#1029 ·

    Maintainers usually reply within 1 day

  • Add type hint support for destructured keys in params and `let`
    Open
    • Is something wrong?
    category:compiler

    Difficulty 4/5 3-5 days Newbie friendliness 18/100

    jank-lang/jank#1028 ·

    Maintainers usually reply within 1 day

  • Add type hint support to `let`
    Open
    • Is something wrong?
    category:compiler

    Difficulty 4/5 3-5 days Newbie friendliness 18/100

    jank-lang/jank#1027 ·

    Maintainers usually reply within 1 day

  • Private vars can be `:refer`’d in jank but not in Clojure
    Open
    • Is something wrong?
    category:runtime

    Difficulty 3/5 1-2 days Newbie friendliness 62/100

    jank-lang/jank#1026 ·

    Maintainers usually reply within 1 day

  • Codegen fails when `case` default clause returns unboxed value
    Open
    • Is something wrong?
    category:compiler

    Difficulty 3/5 1-2 days Newbie friendliness 45/100

    jank-lang/jank#1025 ·

    Maintainers usually reply within 1 day

  • spit with :append true does not append (the file is overwritten)
    Open
    • Is something wrong?
    category:runtime

    Difficulty 2/5 1-3 hours Newbie friendliness 72/100

    jank-lang/jank#1021 ·

    Maintainers usually reply within 1 day

  • `mod` and `rem` return reals when given integer arguments
    Open
    • Is something wrong?
    category:runtime

    Difficulty 3/5 Half a day Newbie friendliness 70/100

    jank-lang/jank#1019 ·

    Maintainers usually reply within 1 day

  • Compilation failure when compiling on raspberry pi
    Open
    • Is something wrong?
    category:clang

    Difficulty 4/5 3-5 days Newbie friendliness 42/100

    jank-lang/jank#1004 ·

    Maintainers usually reply within 1 day

  • `reduce-kv` doesn't work for vectors
    Open
    • Is something wrong?
    category:runtime

    Difficulty 3/5 1-2 days Newbie friendliness 64/100

    jank-lang/jank#985 ·

    Maintainers usually reply within 1 day

  • Error: `no viable overloaded '='` for `case` when there's an "else" branch
    Open
    • Is something wrong?
    category:compiler

    Difficulty 4/5 3-5 days Newbie friendliness 55/100

    jank-lang/jank#984 ·

    Maintainers usually reply within 1 day

  • `This integer literal ended unexpectedly` error when using `-r*` names
    Open
    • Is something wrong?
    category:compiler

    Difficulty 3/5 1-2 days Newbie friendliness 68/100

    jank-lang/jank#983 ·

    Maintainers usually reply within 1 day

  • cmake --install produces a tree whose jank segfaults: PCH not installed, build-tree paths baked into the binary
    Open
    • Is something wrong?
    category:distribution

    Difficulty 4/5 3-5 days Newbie friendliness 48/100

    jank-lang/jank#959 · 2 comments ·

    Maintainers usually reply within 1 day

  • JIT compiled headers and thread_local destructors might be causing segfaults on process exit
    Open
    • Is something wrong?
    category:clang

    Difficulty 4/5 3-5 days Newbie friendliness 48/100

    jank-lang/jank#854 · 3 comments ·

    Maintainers usually reply within 1 day

  • Empty metadata is being set on literal values
    Open
    • Is something wrong?
    category:runtime

    Difficulty 3/5 1-2 days Newbie friendliness 55/100

    jank-lang/jank#742 · 2 comments ·

    Maintainers usually reply within 1 day

  • Support jank on MS-Windows (MSYS2/CLANG64 toolchain)
    Open
    • Is something wrong?
    category:distribution

    Difficulty 5/5 Over a week Newbie friendliness 20/100

    jank-lang/jank#713 · 1 reaction ·

    Maintainers usually reply within 1 day

  • Prevent `.foo` and `.-foo` symbols from being used outside call position
    Open
    • Is something wrong?
    category:compiler help wanted

    jank-lang/jank#691 · 1 comment ·

    Maintainers usually reply within 1 day

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