Function host_function_wrapper

pub fn host_function_wrapper<Params: InteropValueList, Results: InteropValueList>(
    params: Vec<Value>,
    f: impl FnOnce(Params) -> Result<Results, HaltExecutionError>,
) -> Result<Vec<Value>, HaltExecutionError>

Helper function to quickly construct host functions without worrying about wasm to Rust type conversion. For reading/writing user data into the current configuration, simply move user_data into the passed closure.

Example

use wasm::{validate, RuntimeInstance, host_function_wrapper, Value, HaltExecutionError};
fn my_wrapped_host_func(user_data: &mut (), params: Vec<Value>) -> Result<Vec<Value>, HaltExecutionError> {
    host_function_wrapper(params, |(x, y): (u32, i32)| -> Result<u32, HaltExecutionError> {
        let _user_data = user_data;
        Ok(x + (y as u32))
    })
}
fn main() {
    let mut instance = RuntimeInstance::new(());
    let foo_bar = instance.add_host_function_typed::<(u32,i32), u32>("foo", "bar", my_wrapped_host_func).unwrap();
}