wasmer/lib/wasi/src/macros.rs

macro_rules! wasi_try {
    ($expr:expr) => {{
        let res: Result<_, crate::syscalls::types::__wasi_errno_t> = $expr;
        match res {
            Ok(val) => {
                wasmer_runtime_core::trace!("wasi::wasi_try::val: {:?}", val);
                val
            }
            Err(err) => {
                wasmer_runtime_core::trace!("wasi::wasi_try::err: {:?}", err);
                return err;
            }
        }
    }};
    ($expr:expr, $e:expr) => {{
        let opt: Option<_> = $expr;
        wasi_try!(opt.ok_or($e))
    }};
}