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| -rw-r--r-- | src/doc/unstable-book/src/language-features/type-alias-enum-variants.md | 36 |
1 files changed, 0 insertions, 36 deletions
diff --git a/src/doc/unstable-book/src/language-features/type-alias-enum-variants.md b/src/doc/unstable-book/src/language-features/type-alias-enum-variants.md deleted file mode 100644 index bcdeafc4b11..00000000000 --- a/src/doc/unstable-book/src/language-features/type-alias-enum-variants.md +++ /dev/null @@ -1,36 +0,0 @@ -# `type_alias_enum_variants` - -The tracking issue for this feature is: [#49683] - -[#49683]: https://github.com/rust-lang/rust/issues/49683 - ------------------------- - -The `type_alias_enum_variants` feature enables the use of variants on type -aliases that refer to enums, as both a constructor and a pattern. That is, -it allows for the syntax `EnumAlias::Variant`, which behaves exactly the same -as `Enum::Variant` (assuming that `EnumAlias` is an alias for some enum type -`Enum`). - -Note that since `Self` exists as a type alias, this feature also enables the -use of the syntax `Self::Variant` within an impl block for an enum type. - -```rust -#![feature(type_alias_enum_variants)] - -enum Foo { - Bar(i32), - Baz { i: i32 }, -} - -type Alias = Foo; - -fn main() { - let t = Alias::Bar(0); - let t = Alias::Baz { i: 0 }; - match t { - Alias::Bar(_i) => {} - Alias::Baz { i: _i } => {} - } -} -``` |