diff options
Diffstat (limited to 'src/libstd')
| -rw-r--r-- | src/libstd/primitive_docs.rs | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/src/libstd/primitive_docs.rs b/src/libstd/primitive_docs.rs index de891ea8918..fc838768322 100644 --- a/src/libstd/primitive_docs.rs +++ b/src/libstd/primitive_docs.rs @@ -269,13 +269,18 @@ mod prim_pointer { } /// - `Borrow`, `BorrowMut` /// - `Default` /// +/// This limitation to `N in 0..33` exists because Rust does not yet support +/// generics over the size of an array type. `[Foo; 3]` and `[Bar; 3]` are +/// instances of same generic type `[T; 3]`, but `[Foo; 3]` and `[Foo; 5]` are +/// entirely different types. As a stopgap, trait implementations are +/// statically generated for `N in 0..33`. +/// /// Arrays coerce to [slices (`[T]`)][slice], so their methods can be called on -/// arrays. +/// arrays. Slices are dynamic and do not coerce to arrays; consequently more +/// methods are defined on `slice` where they support both types. /// /// [slice]: primitive.slice.html /// -/// Rust does not currently support generics over the size of an array type. -/// /// # Examples /// /// ``` |