openworkers-serde-v8 146.0.0

Rust to V8 serialization and deserialization for OpenWorkers
Documentation 
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// Copyright 2018-2025 the Deno authors. MIT license.

use serde::Deserialize;

#[derive(Debug, Deserialize)]
struct MathOp {
    pub a: u64,
    pub b: u64,
    pub operator: Option<String>,
}

fn main() {
    let platform = v8::new_default_platform(0, false).make_shared();
    v8::V8::initialize_platform(platform);
    v8::V8::initialize();

    {
        let isolate = &mut v8::Isolate::new(v8::CreateParams::default());
        v8::scope!(handle_scope, isolate);
        let context = v8::Context::new(handle_scope, Default::default());
        let scope = &mut v8::ContextScope::new(handle_scope, context);

        fn exec<'s>(scope: &mut v8::PinScope<'s, '_>, src: &str) -> v8::Local<'s, v8::Value> {
            let code = v8::String::new(scope, src).unwrap();
            let script = v8::Script::compile(scope, code, None).unwrap();
            script.run(scope).unwrap()
        }

        let v = exec(scope, "32");
        let x32: u64 = serde_v8::from_v8(scope, v).unwrap();
        println!("x32 = {x32}");

        let v = exec(scope, "({a: 1, b: 3, c: 'ignored'})");
        let mop: MathOp = serde_v8::from_v8(scope, v).unwrap();
        println!(
            "mop = {{ a: {}, b: {}, operator: {:?} }}",
            mop.a, mop.b, mop.operator
        );

        let v = exec(scope, "[1,2,3,4,5]");
        let arr: Vec<u64> = serde_v8::from_v8(scope, v).unwrap();
        println!("arr = {arr:?}");

        let v = exec(scope, "['hello', 'world']");
        let hi: Vec<String> = serde_v8::from_v8(scope, v).unwrap();
        println!("hi = {hi:?}");

        let v: v8::Local<v8::Value> = v8::Number::new(scope, 12345.0).into();
        let x: f64 = serde_v8::from_v8(scope, v).unwrap();
        println!("x = {x}");
    }

    // SAFETY: all isolates have been destroyed, so we can now safely let V8 clean
    // up its resources.
    unsafe {
        v8::V8::dispose();
    }
    v8::V8::dispose_platform();
}