What is Mojo written in?
Mojo is a programming language, first released in 2023.
Implementation
| Layer | Written in | Notes |
|---|---|---|
| Compiler | C++ (since 2023) | Mojo toolchain written in C++ |
| Compiler | LLVM (since 2023) | Mojo uses MLIR/LLVM backend |
Compiler implementation
The Mojo compiler, written in C++ and LLVM, translates Mojo source code into an executable or intermediate format. The choice of implementation language affects the compiler's portability, build-time dependencies, and the path toward Mojo eventually becoming self-hosting.
Many language compilers are written in C or C++ for maximum portability and performance. When a compiler is written in a higher-level language, it can leverage that language's abstractions for clearer compiler code, at the cost of a longer bootstrap dependency chain.
Explore in the Graph
See Mojo's full lineage, including all implementation and influence relationships, in the interactive graph.
Open Interactive Graph →Or view the Mojo language page for the complete record.