forked from extern/nushell
93e8f6c05e
We split off the evaluation engine part of nu-cli into its own crate. This helps improve build times for nu-cli by 17% in my tests. It also helps us see a bit better what's the core engine portion vs the part specific to the interactive CLI piece. There's more than can be done here, but I think it's a good start in the right direction.
94 lines
2.2 KiB
Rust
94 lines
2.2 KiB
Rust
#[macro_export]
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macro_rules! return_err {
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($expr:expr) => {
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match $expr {
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Err(_) => return,
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Ok(expr) => expr,
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};
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};
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}
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#[macro_export]
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macro_rules! stream {
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($($expr:expr),*) => {{
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let mut v = VecDeque::new();
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$(
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v.push_back($expr);
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)*
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v
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}}
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}
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#[macro_export]
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macro_rules! trace_stream {
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(target: $target:tt, $desc:tt = $expr:expr) => {{
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if log::log_enabled!(target: $target, log::Level::Trace) {
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use futures::stream::StreamExt;
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let objects = $expr.inspect(move |o| {
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trace!(
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target: $target,
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"{} = {}",
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$desc,
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nu_source::PrettyDebug::plain_string(o, 70)
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);
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});
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nu_stream::InputStream::from_stream(objects.boxed())
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} else {
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$expr
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}
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}};
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}
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#[macro_export]
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macro_rules! trace_out_stream {
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(target: $target:tt, $desc:tt = $expr:expr) => {{
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if log::log_enabled!(target: $target, log::Level::Trace) {
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use futures::stream::StreamExt;
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let objects = $expr.inspect(move |o| {
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trace!(
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target: $target,
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"{} = {}",
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$desc,
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match o {
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Err(err) => format!("{:?}", err),
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Ok(value) => value.display(),
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}
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);
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});
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$crate::stream::OutputStream::new(objects)
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} else {
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$expr
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}
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}};
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}
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pub(crate) use futures::stream::BoxStream;
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pub(crate) use futures::{Stream, StreamExt};
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pub(crate) use std::collections::VecDeque;
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pub(crate) use std::future::Future;
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pub(crate) use std::sync::Arc;
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pub(crate) use crate::{InputStream, OutputStream};
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pub trait ToOutputStream {
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fn to_output_stream(self) -> OutputStream;
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}
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impl<T, U> ToOutputStream for T
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where
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T: Stream<Item = U> + Send + 'static,
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U: Into<nu_protocol::ReturnValue>,
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{
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fn to_output_stream(self) -> OutputStream {
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OutputStream {
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values: self.map(|item| item.into()).boxed(),
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}
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}
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}
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