1 files changed, 121 insertions, 5 deletions

diff --git a/crates/test_utils/src/minicore.rs b/crates/test_utils/src/minicore.rs
index 9ec541c57..ce6ad8541 100644
--- a/crates/test_utils/src/minicore.rs
+++ b/crates/test_utils/src/minicore.rs
@@ -15,14 +15,17 @@
 //!     range:
 //!     deref: sized
 //!     deref_mut: deref
+//!     index: sized
 //!     fn:
 //!     pin:
 //!     future: pin
 //!     option:
 //!     result:
 //!     iterator: option
-//!     iterators: iterator
+//!     iterators: iterator, fn
 //!     default: sized
+//!     clone: sized
+//!     copy: clone
 //!     from: sized
 //!     eq: sized
 //!     ord: eq, option
@@ -40,6 +43,38 @@ pub mod marker {
     #[lang = "unsize"]
     pub trait Unsize<T: ?Sized> {}
     // endregion:unsize
+
+    // region:copy
+    #[lang = "copy"]
+    pub trait Copy: Clone {}
+    // region:derive
+    #[rustc_builtin_macro]
+    pub macro Copy($item:item) {}
+    // endregion:derive
+
+    mod copy_impls {
+        use super::Copy;
+
+        macro_rules! impl_copy {
+            ($($t:ty)*) => {
+                $(
+                    impl Copy for $t {}
+                )*
+            }
+        }
+
+        impl_copy! {
+            usize u8 u16 u32 u64 u128
+            isize i8 i16 i32 i64 i128
+            f32 f64
+            bool char
+        }
+
+        impl<T: ?Sized> Copy for *const T {}
+        impl<T: ?Sized> Copy for *mut T {}
+        impl<T: ?Sized> Copy for &T {}
+    }
+    // endregion:copy
 }
 
 // region:default
@@ -50,6 +85,19 @@ pub mod default {
 }
 // endregion:default
 
+// region:clone
+pub mod clone {
+    #[lang = "clone"]
+    pub trait Clone: Sized {
+        fn clone(&self) -> Self;
+    }
+    // region:derive
+    #[rustc_builtin_macro]
+    pub macro Clone($item:item) {}
+    // endregion:derive
+}
+// endregion:clone
+
 // region:from
 pub mod convert {
     pub trait From<T>: Sized {
@@ -114,9 +162,53 @@ pub mod ops {
         }
         // endregion:deref_mut
     }
-    pub use self::deref::Deref;
-    pub use self::deref::DerefMut; //:deref_mut
-                                   // endregion:deref
+    pub use self::deref::{
+        Deref,
+        DerefMut, // :deref_mut
+    };
+    // endregion:deref
+
+    // region:index
+    mod index {
+        #[lang = "index"]
+        pub trait Index<Idx: ?Sized> {
+            type Output: ?Sized;
+            fn index(&self, index: Idx) -> &Self::Output;
+        }
+        #[lang = "index_mut"]
+        pub trait IndexMut<Idx: ?Sized>: Index<Idx> {
+            fn index_mut(&mut self, index: Idx) -> &mut Self::Output;
+        }
+
+        // region:slice
+        impl<T, I> Index<I> for [T]
+        where
+            I: SliceIndex<[T]>,
+        {
+            type Output = I::Output;
+            fn index(&self, index: I) -> &I::Output {
+                loop {}
+            }
+        }
+        impl<T, I> IndexMut<I> for [T]
+        where
+            I: SliceIndex<[T]>,
+        {
+            fn index_mut(&mut self, index: I) -> &mut I::Output {
+                loop {}
+            }
+        }
+
+        pub unsafe trait SliceIndex<T: ?Sized> {
+            type Output: ?Sized;
+        }
+        unsafe impl<T> SliceIndex<[T]> for usize {
+            type Output = T;
+        }
+        // endregion:slice
+    }
+    pub use self::index::{Index, IndexMut};
+    // endregion:index
 
     // region:range
     mod range {
@@ -298,7 +390,6 @@ pub mod iter {
             iter: I,
             n: usize,
         }
-
         impl<I> Iterator for Take<I>
         where
             I: Iterator,
@@ -309,6 +400,22 @@ pub mod iter {
                 loop {}
             }
         }
+
+        pub struct FilterMap<I, F> {
+            iter: I,
+            f: F,
+        }
+        impl<B, I: Iterator, F> Iterator for FilterMap<I, F>
+        where
+            F: FnMut(I::Item) -> Option<B>,
+        {
+            type Item = B;
+
+            #[inline]
+            fn next(&mut self) -> Option<B> {
+                loop {}
+            }
+        }
     }
     pub use self::adapters::Take;
 
@@ -356,6 +463,13 @@ pub mod iter {
                 fn take(self, n: usize) -> crate::iter::Take<Self> {
                     loop {}
                 }
+                fn filter_map<B, F>(self, f: F) -> crate::iter::FilterMap<Self, F>
+                where
+                    Self: Sized,
+                    F: FnMut(Self::Item) -> Option<B>,
+                {
+                    loop {}
+                }
                 // endregion:iterators
             }
             impl<I: Iterator + ?Sized> Iterator for &mut I {
@@ -402,12 +516,14 @@ mod macros {
 pub mod prelude {
     pub mod v1 {
         pub use crate::{
+            clone::Clone,                       // :clone
             cmp::{Eq, PartialEq},               // :eq
             cmp::{Ord, PartialOrd},             // :ord
             convert::{From, Into},              // :from
             default::Default,                   // :default
             iter::{IntoIterator, Iterator},     // :iterator
             macros::builtin::derive,            // :derive
+            marker::Copy,                       // :copy
             marker::Sized,                      // :sized
             ops::{Fn, FnMut, FnOnce},           // :fn
             option::Option::{self, None, Some}, // :option