macro_rules! block { ($e:expr) => { ... }; }
Expand description
Turns the non-blocking expression $e
into a blocking operation.
This is accomplished by continuously calling the expression $e
until it no
longer returns Error::WouldBlock
§Input
An expression $e
that evaluates to nb::Result<T, E>
§Output
Ok(t)
if$e
evaluates toOk(t)
Err(e)
if$e
evaluates toErr(nb::Error::Other(e))