Use futures-core and futures-tasks via futures-util.

Just to reduce number of dependencies.

Cargo.toml

@@ -35,7 +35,7 @@ luau = ["ffi/luau"]
 luau-jit = ["luau", "ffi/luau-codegen"]
 vendored = ["ffi/vendored"]
 module = ["mlua_derive", "ffi/module"]
-async = ["futures-core", "futures-task", "futures-util"]
+async = ["futures-util"]
 send = []
 serialize = ["serde", "erased-serde", "serde-value"]
 macros = ["mlua_derive/macros"]
@@ -47,9 +47,7 @@ bstr = { version = "1.0", features = ["std"], default_features = false }
 once_cell = { version = "1.0" }
 num-traits = { version = "0.2.14" }
 rustc-hash = "1.0"
-futures-core = { version = "0.3.5", optional = true }
-futures-task = { version = "0.3.5", optional = true }
-futures-util = { version = "0.3.5", optional = true }
+futures-util = { version = "0.3", optional = true, default-features = false, features = ["std"] }
 serde = { version = "1.0", optional = true }
 erased-serde = { version = "0.3", optional = true }
 serde-value = { version = "0.7", optional = true }

src/chunk.rs

@@ -11,7 +11,7 @@ use crate::lua::Lua;
 use crate::value::{FromLuaMulti, IntoLua, IntoLuaMulti, Value};
 
 #[cfg(feature = "async")]
-use {futures_core::future::LocalBoxFuture, futures_util::future};
+use futures_util::future::{self, LocalBoxFuture};
 
 /// Trait for types [loadable by Lua] and convertible to a [`Chunk`]
 ///

src/function.rs

@@ -16,8 +16,7 @@ use crate::value::{FromLuaMulti, IntoLua, IntoLuaMulti};
 #[cfg(feature = "async")]
 use {
     crate::types::AsyncCallback,
-    futures_core::future::{Future, LocalBoxFuture},
-    futures_util::{future, TryFutureExt},
+    futures_util::future::{self, Future, LocalBoxFuture, TryFutureExt},
 };
 
 /// Handle to an internal Lua function.

src/lua.rs

@@ -54,12 +54,8 @@ use crate::{chunk::Compiler, types::VmState};
 #[cfg(feature = "async")]
 use {
     crate::types::{AsyncCallback, AsyncCallbackUpvalue, AsyncPollUpvalue},
-    futures_task::noop_waker_ref,
-    futures_util::future::{self, TryFutureExt},
-    std::{
-        future::Future,
-        task::{Context, Poll, Waker},
-    },
+    futures_util::future::{self, Future, TryFutureExt},
+    futures_util::task::{noop_waker_ref, Context, Poll, Waker},
 };
 
 #[cfg(feature = "serialize")]

src/scope.rs

@@ -24,7 +24,7 @@ use crate::value::{FromLua, FromLuaMulti, IntoLua, IntoLuaMulti, MultiValue, Val
 use crate::userdata::USER_VALUE_MAXSLOT;
 
 #[cfg(feature = "async")]
-use futures_core::future::Future;
+use std::future::Future;
 
 /// Constructed by the [`Lua::scope`] method, allows temporarily creating Lua userdata and
 /// callbacks that are not required to be Send or 'static.

src/table.rs

@@ -18,7 +18,7 @@ use crate::util::{assert_stack, check_stack, StackGuard};
 use crate::value::{FromLua, FromLuaMulti, IntoLua, IntoLuaMulti, Nil, Value};
 
 #[cfg(feature = "async")]
-use {futures_core::future::LocalBoxFuture, futures_util::future};
+use futures_util::future::{self, LocalBoxFuture};
 
 /// Handle to an internal Lua table.
 #[derive(Clone)]

src/thread.rs

@@ -27,8 +27,9 @@ use {
         lua::ASYNC_POLL_PENDING,
         value::{MultiValue, Value},
     },
-    futures_core::{future::Future, stream::Stream},
+    futures_util::stream::Stream,
     std::{
+        future::Future,
         marker::PhantomData,
         pin::Pin,
         ptr::NonNull,

src/types.rs

@@ -9,7 +9,7 @@ use std::{fmt, mem, ptr};
 use std::ffi::CStr;
 
 #[cfg(feature = "async")]
-use futures_core::future::LocalBoxFuture;
+use futures_util::future::LocalBoxFuture;
 
 use crate::error::Result;
 #[cfg(not(feature = "luau"))]

src/userdata_ext.rs

@@ -4,7 +4,7 @@ use crate::userdata::{AnyUserData, MetaMethod};
 use crate::value::{FromLua, FromLuaMulti, IntoLua, IntoLuaMulti, Value};
 
 #[cfg(feature = "async")]
-use {futures_core::future::LocalBoxFuture, futures_util::future};
+use futures_util::future::{self, LocalBoxFuture};
 
 /// An extension trait for [`AnyUserData`] that provides a variety of convenient functionality.
 pub trait AnyUserDataExt<'lua>: Sealed {