Method invoke_func

src/commands/run.rs:990–1078

(&self, store: &mut Store<Host>, func: Func)

    }

    async fn invoke_func(&self, store: &mut Store<Host>, func: Func) -> Result<()> {
        let ty = func.ty(&store);
        if ty.params().len() > 0 {
            eprintln!(
                "warning: using `--invoke` with a function that takes arguments \
                 is experimental and may break in the future"
            );
        }
        let mut args = self.module_and_args.iter().skip(1);
        let mut values = Vec::new();
        for ty in ty.params() {
            let val = match args.next() {
                Some(s) => s,
                None => {
                    if let Some(name) = &self.invoke {
                        bail!("not enough arguments for `{name}`")
                    } else {
                        bail!("not enough arguments for command default")
                    }
                }
            };
            let val = val
                .to_str()
                .ok_or_else(|| format_err!("argument is not valid utf-8: {val:?}"))?;
            values.push(match ty {
                // Supports both decimal and hexadecimal notation (with 0x prefix)
                ValType::I32 => Val::I32(if val.starts_with("0x") || val.starts_with("0X") {
                    i32::from_str_radix(&val[2..], 16)?
                } else {
                    val.parse::<i32>()?
                }),
                ValType::I64 => Val::I64(if val.starts_with("0x") || val.starts_with("0X") {
                    i64::from_str_radix(&val[2..], 16)?
                } else {
                    val.parse::<i64>()?
                }),
                ValType::F32 => Val::F32(val.parse::<f32>()?.to_bits()),
                ValType::F64 => Val::F64(val.parse::<f64>()?.to_bits()),
                t => bail!("unsupported argument type {t:?}"),
            });
        }

        // Invoke the function and then afterwards print all the results that came
        // out, if there are any.
        let mut results = vec![Val::null_func_ref(); ty.results().len()];
        let invoke_res = func
            .call_async(&mut *store, &values, &mut results)
            .await
            .with_context(|| {
                if let Some(name) = &self.invoke {
                    format!("failed to invoke `{name}`")
                } else {
                    format!("failed to invoke command default")
                }
            });

        if let Err(err) = invoke_res {
            return Err(self.handle_core_dump(&mut *store, err));