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-rw-r--r--futures/src/command.rs138
1 files changed, 0 insertions, 138 deletions
diff --git a/futures/src/command.rs b/futures/src/command.rs
deleted file mode 100644
index b06ab3f8..00000000
--- a/futures/src/command.rs
+++ /dev/null
@@ -1,138 +0,0 @@
-use crate::BoxFuture;
-use futures::future::{Future, FutureExt};
-
-/// A collection of async operations.
-///
-/// You should be able to turn a future easily into a [`Command`], either by
-/// using the `From` trait or [`Command::perform`].
-pub struct Command<T> {
- futures: Vec<BoxFuture<T>>,
-}
-
-impl<T> Command<T> {
- /// Creates an empty [`Command`].
- ///
- /// In other words, a [`Command`] that does nothing.
- pub fn none() -> Self {
- Self {
- futures: Vec::new(),
- }
- }
-
- /// Creates a [`Command`] that performs the action of the given future.
- #[cfg(not(target_arch = "wasm32"))]
- pub fn perform<A>(
- future: impl Future<Output = T> + 'static + Send,
- f: impl Fn(T) -> A + 'static + Send,
- ) -> Command<A> {
- Command {
- futures: vec![Box::pin(future.map(f))],
- }
- }
-
- /// Creates a [`Command`] that performs the action of the given future.
- #[cfg(target_arch = "wasm32")]
- pub fn perform<A>(
- future: impl Future<Output = T> + 'static,
- f: impl Fn(T) -> A + 'static + Send,
- ) -> Command<A> {
- Command {
- futures: vec![Box::pin(future.map(f))],
- }
- }
-
- /// Applies a transformation to the result of a [`Command`].
- #[cfg(not(target_arch = "wasm32"))]
- pub fn map<A>(
- mut self,
- f: impl Fn(T) -> A + 'static + Send + Sync,
- ) -> Command<A>
- where
- T: 'static,
- {
- let f = std::sync::Arc::new(f);
-
- Command {
- futures: self
- .futures
- .drain(..)
- .map(|future| {
- let f = f.clone();
-
- Box::pin(future.map(move |result| f(result)))
- as BoxFuture<A>
- })
- .collect(),
- }
- }
-
- /// Applies a transformation to the result of a [`Command`].
- #[cfg(target_arch = "wasm32")]
- pub fn map<A>(mut self, f: impl Fn(T) -> A + 'static) -> Command<A>
- where
- T: 'static,
- {
- let f = std::rc::Rc::new(f);
-
- Command {
- futures: self
- .futures
- .drain(..)
- .map(|future| {
- let f = f.clone();
-
- Box::pin(future.map(move |result| f(result)))
- as BoxFuture<A>
- })
- .collect(),
- }
- }
-
- /// Creates a [`Command`] that performs the actions of all the given
- /// commands.
- ///
- /// Once this command is run, all the commands will be executed at once.
- pub fn batch(commands: impl IntoIterator<Item = Command<T>>) -> Self {
- Self {
- futures: commands
- .into_iter()
- .flat_map(|command| command.futures)
- .collect(),
- }
- }
-
- /// Converts a [`Command`] into its underlying list of futures.
- pub fn futures(self) -> Vec<BoxFuture<T>> {
- self.futures
- }
-}
-
-#[cfg(not(target_arch = "wasm32"))]
-impl<T, A> From<A> for Command<T>
-where
- A: Future<Output = T> + 'static + Send,
-{
- fn from(future: A) -> Self {
- Self {
- futures: vec![future.boxed()],
- }
- }
-}
-
-#[cfg(target_arch = "wasm32")]
-impl<T, A> From<A> for Command<T>
-where
- A: Future<Output = T> + 'static,
-{
- fn from(future: A) -> Self {
- Self {
- futures: vec![future.boxed_local()],
- }
- }
-}
-
-impl<T> std::fmt::Debug for Command<T> {
- fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
- f.debug_struct("Command").finish()
- }
-}