internal: add result to minicore

crates/hir_ty/src/tests/traits.rs

@@ -3627,16 +3627,7 @@ impl foo::Foo for u32 {
 fn infer_async_ret_type() {
     check_types(
         r#"
-//- /main.rs crate:main deps:core
+//- minicore: future, result
-
-enum Result<T, E> {
-    Ok(T),
-    Err(E),
-}
-
-use Result::*;
-
-
 struct Fooey;
 
 impl Fooey {
@@ -3659,15 +3650,6 @@ async fn get_accounts() -> Result<u32, ()> {
     //                      ^ u32
     Ok(ret)
 }
-
-//- /core.rs crate:core
-#[prelude_import] use future::*;
-mod future {
-    #[lang = "future_trait"]
-    trait Future {
-        type Output;
-    }
-}
 "#,
     );
 }

crates/test_utils/src/minicore.rs

@@ -17,6 +17,7 @@
 //!     pin:
 //!     future: pin
 //!     option:
+//!     result:
 
 pub mod marker {
     // region:sized
@@ -127,6 +128,17 @@ pub mod option {
 }
 // endregion:option
 
+// region:result
+pub mod result {
+    pub enum Result<T, E> {
+        #[lang = "Ok"]
+        Ok(T),
+        #[lang = "Err"]
+        Err(E),
+    }
+}
+// endregion:result
+
 // region:pin
 pub mod pin {
     #[lang = "pin"]
@@ -167,8 +179,11 @@ pub mod task {
 
 pub mod prelude {
     pub mod v1 {
-        pub use crate::marker::Sized; // :sized
+        pub use crate::{
-        pub use crate::option::Option::{self, None, Some}; // :option
+            marker::Sized,                      // :sized
+            option::Option::{self, None, Some}, // :option
+            result::Result::{self, Err, Ok},    // :result
+        };
     }
 
     pub mod rust_2015 {