Generate wat in Rust

anon80458984 · May 31, 2020, 6:57am

I'm not asking about compiling Rust to wasm or compiling Rust to wat.

I want my rust code to generate Wat.

I want to generate the exprs in Understanding WebAssembly text format - WebAssembly | MDN

Is there some Rust crate for generating this? To clarify: I'm not asking about parsing/loading/compilingto wasm. I literally just want to generate wat on the fly.

rich-murphey · June 1, 2020, 1:01am

One option for generating wat is Wasmtime which uses compilers to generate wat from Rust, C/C++ and AssemblyScript.

Hyeonu · June 1, 2020, 1:03am

What WAT code you want to generate from Rust? WAT is a textual format and you can easily write it by hand on your favorite text editor.

parasyte · June 1, 2020, 4:19am

It looks like binaryen-sys has a method for transforming a module AST into WAT: binaryen_sys::BinaryenModuleWriteText - Rust

It's an unsafe interface, but it's the only thing I've found that writes WAT.

rich-murphey · June 2, 2020, 12:35am

Lucet has a rust api to compile and link code.
https://crates.io/crates/lucet-wasi-sdk

Example use in their tests:

github.com

bytecodealliance/lucet/blob/main/lucet-wasi-sdk/tests/compile_and_link.rs

#[cfg(test)]
mod compile_and_link_tests {
    use lucet_wasi_sdk::*;
    use std::path::PathBuf;
    use tempfile::TempDir;

    fn test_file(name: &str) -> PathBuf {
        let mut p = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
        p.push("tests");
        p.push(name);
        assert!(p.exists(), "test file does not exist");
        p
    }

    #[test]
    fn compile_a() {
        let tmp = TempDir::new().expect("create temporary directory");

        let compiler = Compile::new(test_file("a.c"));

This file has been truncated. show original

system · August 31, 2020, 12:36am

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Generate wat in Rust

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