dtolnay/cxx

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Safe interop between Rust and C++

Stars: 6.8k
Forks: 423
Open beginner issues: 0
Indexed issues: 163
Avg merge: 1h 19m
Merged PRs (30d): 6

Dominant language: Rust
License: Apache-2.0
Last GitHub push: Sep 12, 2026
Latest indexed: Sep 15, 2026
Contributing guide: No contributing guide
Code of conduct: Code of conduct
Beginner labels: help wanted

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163 open issues indexed

`Result` Thoughts about Leaf / Outcome & PR0709 Open

needs design

dtolnay/cxx#16 · 1 comment · 2 reactions · 0 assignees · Indexed Sep 15, 2026
Support passing function pointers across the FFI Open

help wanted

dtolnay/cxx#52 · 6 comments · 9 reactions · 0 assignees · Indexed Sep 15, 2026
Shared structs with type parameters Open

help wanted

dtolnay/cxx#54 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Support rust `Option` and C++ `std::optional` Open

new binding

dtolnay/cxx#87 · 21 comments · 53 reactions · 0 assignees · Indexed Sep 15, 2026
Nonthrowing constructors for C++ binding of Rust std types Open

needs design

dtolnay/cxx#92 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Box clone() member function to call Clone on opaque Rust types Open

help wanted

dtolnay/cxx#105 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Better integration between derives and operator overloads Open

help wanted

dtolnay/cxx#109 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Smarter handling of illegal names Open

help wanted

dtolnay/cxx#110 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Consider supporting closures/lambdas, not just function pointers Open

needs design

dtolnay/cxx#114 · 3 comments · 6 reactions · 0 assignees · Indexed Sep 15, 2026
Support async functions Open

dtolnay/cxx#138 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Support Rust tuples and C++ `std::tuple` Open

new binding

dtolnay/cxx#142 · 0 comments · 27 reactions · 0 assignees · Indexed Sep 15, 2026
Basic typo detection Open

help wanted

dtolnay/cxx#145 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Figure out where to put #[inline] Open

help wanted

dtolnay/cxx#146 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Ruleset for types Open

dtolnay/cxx#161 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Permissibility heuristics for signatures involving lifetimes Open

help wanted

dtolnay/cxx#165 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Extensible "builtin" types for adding custom type interfaces Open

dtolnay/cxx#171 · 2 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
Write the cxx version number in fewer places Open

code quality

dtolnay/cxx#173 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
std::variant support Open

new binding

dtolnay/cxx#217 · 2 comments · 7 reactions · 0 assignees · Indexed Sep 15, 2026
Sugar Needed? Open

integration

dtolnay/cxx#228 · 9 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Decoupling new type mappings from the `cxx` crate Open

needs design

dtolnay/cxx#251 · 7 comments · 5 reactions · 0 assignees · Indexed Sep 15, 2026
Adding windows pointer/integer data types Open

help wanted windows

dtolnay/cxx#254 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Provide builtin handling of exposing a C++ constructor Open

help wanted

dtolnay/cxx#280 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Preserve cause-chain of errors propagated from rust -> c++ -> rust Open

help wanted needs design

dtolnay/cxx#290 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Permit Opaque types as fields of shared structs, making the shared struct Opaque Open

needs design

dtolnay/cxx#340 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Improvements to namespace support Open

help wanted

dtolnay/cxx#353 · 16 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Plan to support atomic types? Open

new binding

dtolnay/cxx#366 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Expand API of cxx_gen::Error Open

help wanted

dtolnay/cxx#378 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Noncompilable C++ code if method has different explicit namespace than the receiver Open

bug help wanted

dtolnay/cxx#460 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
"Geometric intuition" page needs a diagram Open

docs

dtolnay/cxx#484 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Extern "Rust" types that are nonlocal Open

help wanted

dtolnay/cxx#496 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
ExternType impl for types that have nonunique C++ path Open

needs design

dtolnay/cxx#529 · 0 comments · 2 reactions · 0 assignees · Indexed Sep 15, 2026
Expose a nonconst reference wrapper binding Open

needs design

dtolnay/cxx#537 · 10 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Support for custom translation Open

dtolnay/cxx#544 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Support moving into an rvalue reference argument Open

help wanted

dtolnay/cxx#561 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Hide Box constructors and assignment when not callable Open

dtolnay/cxx#575 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Improve error message on signatures containing self by value Open

help wanted

dtolnay/cxx#577 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
char is not supported as function argument Open

dtolnay/cxx#592 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Support member typedefs (nested types) Open

help wanted

dtolnay/cxx#593 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
Consider exposing a slice DST over Opaque elements Open

needs design

dtolnay/cxx#626 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Passing trait objects to C++ Open

dtolnay/cxx#665 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Exposing trait methods to C++ Open

dtolnay/cxx#667 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Vec<Vec<T>> Open

dtolnay/cxx#671 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Handle &CStr <-> const char* Open

help wanted

dtolnay/cxx#681 · 2 comments · 2 reactions · 0 assignees · Indexed Sep 15, 2026
Implement glob import semantics for builtin type names Open

help wanted

dtolnay/cxx#682 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Extern type with generic type parameter Open

dtolnay/cxx#683 · 1 comment · 7 reactions · 0 assignees · Indexed Sep 15, 2026
Map trait to a C++ interface / abstract class Open

dtolnay/cxx#687 · 1 comment · 13 reactions · 0 assignees · Indexed Sep 15, 2026
Support UniquePtr as self type of extern C++ member function Open

help wanted

dtolnay/cxx#690 · 0 comments · 5 reactions · 0 assignees · Indexed Sep 15, 2026
Support calling reference qualified member function from Rust Open

dtolnay/cxx#715 · 1 comment · 1 reaction · 0 assignees · Indexed Sep 15, 2026
Make it possible to specify source-only includes Open

dtolnay/cxx#719 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Collision between member function of type in global namespace and builtin binding can violate ODR Open

dtolnay/cxx#724 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026

dtolnay/cxx

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