// Copyright 2022 The Evcxr Authors.
//
// Licensed under the Apache License, Version 2.0 <LICENSE or
// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE
// or https://opensource.org/licenses/MIT>, at your option. This file may not be
// copied, modified, or distributed except according to those terms.
use evcxr::Error;
use evcxr::EvalContext;
fn main() -> Result<(), Error> {
// You must call ```evcxr::runtime_hook()``` at the top of main, otherwise
// the library becomes a fork-bomb.
evcxr::runtime_hook();
let (mut context, outputs) = EvalContext::new()?;
context.eval("let mut s = String::new();")?;
context.eval(r#"s.push_str("Hello, ");"#)?;
context.eval(r#"s.push_str("World!");"#)?;
context.eval(r#"println!("{}", s);"#)?;
// For this trivial example, we just receive a single line of output from
// the code that was run. In a more complex case, we'd likely want to have
// separate threads waiting for output on both stdout and stderr.
if let Ok(line) = outputs.stdout.recv() {
println!("{line}");
}
Ok(())
}