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use crate::prelude::*;
use nu_protocol::{ReturnSuccess, ReturnValue, Value};
use std::iter::IntoIterator;
pub type OutputStream = InputStream;
pub struct ActionStream {
pub values: Box<dyn Iterator<Item = ReturnValue> + Send + Sync>,
}
impl Iterator for ActionStream {
type Item = ReturnValue;
fn next(&mut self) -> Option<Self::Item> {
self.values.next()
}
}
impl ActionStream {
pub fn new(values: impl Iterator<Item = ReturnValue> + Send + Sync + 'static) -> ActionStream {
ActionStream {
values: Box::new(values),
}
}
pub fn empty() -> ActionStream {
ActionStream {
values: Box::new(std::iter::empty()),
}
}
pub fn one(item: impl Into<ReturnValue>) -> ActionStream {
let item = item.into();
ActionStream {
values: Box::new(std::iter::once(item)),
}
}
pub fn from_input(input: impl Iterator<Item = Value> + Send + Sync + 'static) -> ActionStream {
ActionStream {
values: Box::new(input.map(ReturnSuccess::value)),
}
}
pub fn drain_vec(&mut self) -> Vec<ReturnValue> {
let mut output = vec![];
for x in &mut self.values {
output.push(x);
}
output
}
}
impl From<InputStream> for ActionStream {
fn from(input: InputStream) -> ActionStream {
ActionStream {
values: Box::new(input.into_iter().map(ReturnSuccess::value)),
}
}
}
impl From<VecDeque<ReturnValue>> for ActionStream {
fn from(input: VecDeque<ReturnValue>) -> ActionStream {
ActionStream {
values: Box::new(input.into_iter()),
}
}
}
impl From<VecDeque<Value>> for ActionStream {
fn from(input: VecDeque<Value>) -> ActionStream {
let stream = input.into_iter().map(ReturnSuccess::value);
ActionStream {
values: Box::new(stream),
}
}
}
impl From<Vec<ReturnValue>> for ActionStream {
fn from(input: Vec<ReturnValue>) -> ActionStream {
ActionStream {
values: Box::new(input.into_iter()),
}
}
}
impl From<Vec<Value>> for ActionStream {
fn from(input: Vec<Value>) -> ActionStream {
let stream = input.into_iter().map(ReturnSuccess::value);
ActionStream {
values: Box::new(stream),
}
}
}