jsxx

jsxx is a transpiler that compiles JavaScript to C++.

More details can be found in the blog post.

Usage

jsxx reads JavaScript from stdin and compiles it to C++ and then uses clang++ to create a binary.

$ cat testprog.js | cargo run
$ ./output
1.000000,2.000000,3.000000

If you have WASI-SDK installed, you can also compile straight to WebAssembly:

$ cat testprog.js | \
    cargo run -- \ 
    --wasm \
    --clang-path $HOME/Downloads/wasi-sdk-16.0/bin/clang++ \
    -- -Oz -flto -Wl,--lto-O3
$ wasmtime output.wasm
1.000000,2.000000,3.000000

If you want to inspect the generated C++ code, use --emit-cpp.

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