Auto merge of #85687 - m-ou-se:new-prelude, r=yaahc

New prelude

RFC: rust-lang/rfcs#3114
Tracking issue: #85684

Author: bors

library/core/src/prelude/mod.rs

@@ -11,31 +11,37 @@ pub mod v1;
 /// The 2015 version of the core prelude.
 ///
 /// See the [module-level documentation](self) for more.
-#[unstable(feature = "prelude_2015", issue = "none")]
+#[unstable(feature = "prelude_2015", issue = "85684")]
 pub mod rust_2015 {
-    #[unstable(feature = "prelude_2015", issue = "none")]
+    #[unstable(feature = "prelude_2015", issue = "85684")]
     #[doc(no_inline)]
     pub use super::v1::*;
 }
 
 /// The 2018 version of the core prelude.
 ///
 /// See the [module-level documentation](self) for more.
-#[unstable(feature = "prelude_2018", issue = "none")]
+#[unstable(feature = "prelude_2018", issue = "85684")]
 pub mod rust_2018 {
-    #[unstable(feature = "prelude_2018", issue = "none")]
+    #[unstable(feature = "prelude_2018", issue = "85684")]
     #[doc(no_inline)]
     pub use super::v1::*;
 }
 
 /// The 2021 version of the core prelude.
 ///
 /// See the [module-level documentation](self) for more.
-#[unstable(feature = "prelude_2021", issue = "none")]
+#[unstable(feature = "prelude_2021", issue = "85684")]
 pub mod rust_2021 {
-    #[unstable(feature = "prelude_2021", issue = "none")]
+    #[unstable(feature = "prelude_2021", issue = "85684")]
     #[doc(no_inline)]
     pub use super::v1::*;
 
-    // FIXME: Add more things.
+    #[unstable(feature = "prelude_2021", issue = "85684")]
+    #[doc(no_inline)]
+    pub use crate::iter::FromIterator;
+
+    #[unstable(feature = "prelude_2021", issue = "85684")]
+    #[doc(no_inline)]
+    pub use crate::convert::{TryFrom, TryInto};
 }

library/std/src/prelude/mod.rs

@@ -88,33 +88,33 @@ pub mod v1;
 /// The 2015 version of the prelude of The Rust Standard Library.
 ///
 /// See the [module-level documentation](self) for more.
-#[unstable(feature = "prelude_2015", issue = "none")]
+#[unstable(feature = "prelude_2015", issue = "85684")]
 pub mod rust_2015 {
-    #[unstable(feature = "prelude_2015", issue = "none")]
+    #[unstable(feature = "prelude_2015", issue = "85684")]
     #[doc(no_inline)]
     pub use super::v1::*;
 }
 
 /// The 2018 version of the prelude of The Rust Standard Library.
 ///
 /// See the [module-level documentation](self) for more.
-#[unstable(feature = "prelude_2018", issue = "none")]
+#[unstable(feature = "prelude_2018", issue = "85684")]
 pub mod rust_2018 {
-    #[unstable(feature = "prelude_2018", issue = "none")]
+    #[unstable(feature = "prelude_2018", issue = "85684")]
     #[doc(no_inline)]
     pub use super::v1::*;
 }
 
 /// The 2021 version of the prelude of The Rust Standard Library.
 ///
 /// See the [module-level documentation](self) for more.
-#[unstable(feature = "prelude_2021", issue = "none")]
+#[unstable(feature = "prelude_2021", issue = "85684")]
 pub mod rust_2021 {
-    #[unstable(feature = "prelude_2021", issue = "none")]
+    #[unstable(feature = "prelude_2021", issue = "85684")]
     #[doc(no_inline)]
     pub use super::v1::*;
 
-    #[unstable(feature = "prelude_2021", issue = "none")]
+    #[unstable(feature = "prelude_2021", issue = "85684")]
     #[doc(no_inline)]
     pub use core::prelude::rust_2021::*;
 }

src/test/ui/prelude2021.rs

@@ -0,0 +1,7 @@
+// check-pass
+// edition:2021
+// compile-flags: -Zunstable-options
+
+fn main() {
+    let _: u16 = 123i32.try_into().unwrap();
+}