Struct WasmCompiler 

pub struct WasmCompiler;

WASM module compiler.

Compiles generated Rust source code to .wasm binaries by creating a temporary Cargo project and invoking cargo build.

Examples

use converge_tool::compile::{WasmCompiler, CompileConfig};

let source = "/* generated Rust source */";
let wasm_bytes = WasmCompiler::compile(source, &CompileConfig::default())?;
assert_eq!(&wasm_bytes[0..4], b"\0asm");

Implementations

impl WasmCompiler

pub fn compile( source: &str, config: &CompileConfig, ) -> Result<Vec<u8>, CompileError>

Compile Rust source code to WASM bytes.

Creates a temporary Cargo project, writes the source as lib.rs, and runs cargo build --target <target> --release.

Errors

Returns CompileError::MissingTarget if the WASM target is not installed. Returns CompileError::BuildFailed if cargo compilation fails.

pub fn compile_truth_file(path: &Path) -> Result<CompiledModule, CompileError>

Compile a .truth file end-to-end: parse → codegen → compile → hash.

Reads the truth file, parses Gherkin scenarios, extracts predicates, generates Rust source, and compiles to WASM bytes. Returns a CompiledModule containing the .wasm bytes, manifest, source hash, and module name.

Currently compiles the first compilable scenario (non-test, with a kind tag). Future versions may compile all scenarios into a multi-invariant module.

Errors

Returns errors for any stage of the pipeline.

pub fn content_hash_wasm(bytes: &[u8]) -> String

Compute SHA-256 content hash for WASM bytes (for ModuleId).