File: Hello.swift

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// This example demonstrates WASI support in WasmKit.

import WasmKit
import WasmKitWASI
import Foundation

@main
struct Example {
    static func main() throws {
        // Parse a WASI-compliant WebAssembly module from a file.
        let module = try parseWasm(filePath: "wasm/hello.wasm")

        // Create a WASI instance forwarding to the host environment.
        let wasi = try WASIBridgeToHost()
        // Create engine and store
        let engine = Engine()
        let store = Store(engine: engine)
        // Instantiate a parsed module importing WASI
        var imports = Imports()
        wasi.link(to: &imports, store: store)
        let instance = try module.instantiate(store: store, imports: imports)

        // Start the WASI command-line application.
        let exitCode = try wasi.start(instance)
        // Exit the Swift program with the WASI exit code.
        exit(Int32(exitCode))
    }
}