--- title: Expose a Rust Library to Other Languages — Slint Blog description: A deep dive into how the SixtyFPS (now Slint) team exposes a Rust library to C++ and JavaScript. Covers the challenges of FFI across language boundaries,... canonical: https://daily.dev/posts/expose-a-rust-library-to-other-languages-slint-blog-1nz3idhgd twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Expose a Rust Library to Other Languages — Slint Blog | daily.dev og:description: A deep dive into how the SixtyFPS (now Slint) team exposes a Rust library to C++ and JavaScript. Covers the challenges of FFI across language boundaries,... og:url: https://daily.dev/posts/expose-a-rust-library-to-other-languages-slint-blog-1nz3idhgd og:image: https://api.daily.dev/og/posts/1NZ3iDhGd.png og:image:alt: Expose a Rust Library to Other Languages — Slint Blog og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Expose a Rust Library to Other Languages — Slint Blog **[Slint](https://daily.dev/sources/slint)** · 13 min read · 0 upvotes · 0 comments ## Summary A deep dive into how the SixtyFPS (now Slint) team exposes a Rust library to C++ and JavaScript. Covers the challenges of FFI across language boundaries, including how to handle non-repr(C) types like strings, vectors, and slices by reimplementing them with stable ABI layouts. Explains how to implement dynamic dispatch (virtual tables) across the FFI boundary since Rust trait objects are not FFI-safe, and how a custom vtable crate solves this. Also covers CMake integration using Corrosion to invoke Cargo automatically, and cbindgen for generating C++ headers from Rust code. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Rust at the Core: Accelerating Polyglot SDK Development by Spencer Judge at QCon SF 2025](https://daily.dev/posts/rust-at-the-core-accelerating-polyglot-sdk-development-by-spencer-judge-at-qcon-sf-2025-uau5c7a49) · InfoQ · 2 upvotes · 0 comments - [C\+\+ to Rust Migration: By Luca Palmieri from Mainmatter](https://daily.dev/posts/c-to-rust-migration-by-luca-palmieri-from-mainmatter-rmmgwzjbp) · JetBrains · 4 upvotes · 0 comments - [I want extern "fil-c"](https://daily.dev/posts/i-want-extern-fil-c--jbh9jxdwl) · Lobsters · 0 upvotes · 0 comments - [SymfonyCon Amsterdam 2025: Symfony and Rust: Accelerating Hot Paths with FFI \(Symfony Blog\)](https://daily.dev/posts/symfonycon-amsterdam-2025-symfony-and-rust-accelerating-hot-paths-with-ffi-symfony-blog--qlywqam2o) · Symfony · 0 upvotes · 0 comments --- Tags: [#rust](https://daily.dev/tags/rust), [#c++](https://daily.dev/tags/c++) [View this post on daily.dev](https://daily.dev/posts/expose-a-rust-library-to-other-languages-slint-blog-1nz3idhgd) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Expose a Rust Library to Other Languages — Slint Blog","url":"https://daily.dev/posts/expose-a-rust-library-to-other-languages-slint-blog-1nz3idhgd","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/expose-a-rust-library-to-other-languages-slint-blog-1nz3idhgd"},"datePublished":"2026-07-12T07:19:45.956Z","dateModified":"2026-07-12T07:20:12.344Z","description":"A deep dive into how the SixtyFPS (now Slint) team exposes a Rust library to C++ and JavaScript. 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