forked from nushell/nushell
/
prelude.rs
59 lines (54 loc) · 1.5 KB
/
prelude.rs
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#[macro_export]
macro_rules! return_err {
($expr:expr) => {
match $expr {
Err(_) => return,
Ok(expr) => expr,
};
};
}
#[macro_export]
macro_rules! trace_out_stream {
(target: $target:tt, $desc:tt = $expr:expr) => {{
if log::log_enabled!(target: $target, log::Level::Trace) {
let objects = $expr.inspect(move |o| {
trace!(
target: $target,
"{} = {}",
$desc,
match o {
Err(err) => format!("{:?}", err),
Ok(value) => value.display(),
}
);
});
nu_stream::OutputStream::new(objects)
} else {
$expr
}
}};
}
pub(crate) use nu_engine::Host;
#[allow(unused_imports)]
pub(crate) use nu_errors::ShellError;
#[allow(unused_imports)]
pub(crate) use nu_protocol::outln;
pub(crate) use nu_stream::ActionStream;
#[allow(unused_imports)]
pub(crate) use nu_value_ext::ValueExt;
#[allow(unused_imports)]
pub(crate) use std::sync::atomic::Ordering;
#[allow(clippy::clippy::wrong_self_convention)]
pub trait FromInputStream {
fn from_input_stream(self) -> ActionStream;
}
impl<T> FromInputStream for T
where
T: Iterator<Item = nu_protocol::Value> + Send + Sync + 'static,
{
fn from_input_stream(self) -> ActionStream {
ActionStream {
values: Box::new(self.map(nu_protocol::ReturnSuccess::value)),
}
}
}