mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-29 21:44:52 +01:00
josh11bandJon Meow
0a93289706
- Makes `Self` a keyword
- Inside `class Foo { `... `}`, `Self` means `Foo`
- Inside `class Foo(T:! Type, U:! Type) {` ...` }`, `Self` means `Foo(T, U)`
- `impl as Bar` means `impl Self as Bar`
- Inside `external impl Foo as Bar {`...`}`, not in a scope already defining `Self`, `Self` means `Foo`
Implemented by introducing a new kind of declaration, a `SelfDeclaration`, that is automatically added to class and impl declarations.
Co-authored-by: Jon Meow <jperkins@google.com>
45 lines
1.3 KiB
Plaintext
45 lines
1.3 KiB
Plaintext
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
|
|
// Exceptions. See /LICENSE for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
// RUN: %{not} %{explorer} %s 2>&1 | \
|
|
// RUN: %{FileCheck} --match-full-lines --allow-unused-prefixes=false %s
|
|
// RUN: %{not} %{explorer} --parser_debug --trace_file=- %s 2>&1 | \
|
|
// RUN: %{FileCheck} --match-full-lines --allow-unused-prefixes %s
|
|
// AUTOUPDATE: %{explorer} %s
|
|
|
|
package ExplorerTest api;
|
|
|
|
interface Vector {
|
|
fn Add[me: Self](b: Self) -> Self;
|
|
fn Scale[me: Self](v: i32) -> Self;
|
|
}
|
|
|
|
class Point {
|
|
var x: i32;
|
|
var y: i32;
|
|
}
|
|
|
|
// CHECK: COMPILATION ERROR: {{.*}}/explorer/testdata/interface/fail_external_impl_self.carbon:[[@LINE+1]]: could not resolve 'Self'
|
|
external impl Self as Vector {
|
|
fn Add[me: Point](b: Point) -> Point {
|
|
return {.x = me.x + b.x, .y = me.y + b.y};
|
|
}
|
|
fn Scale[me: Point](v: i32) -> Point {
|
|
return {.x = me.x * v, .y = me.y * v};
|
|
}
|
|
}
|
|
|
|
fn AddAndScaleGeneric[T:! Vector](a: T, b: T, s: i32) -> T {
|
|
var m: auto = a.Add;
|
|
var n: auto = m(b).Scale;
|
|
return n(s);
|
|
}
|
|
|
|
fn Main() -> i32 {
|
|
var a: Point = {.x = 1, .y = 4};
|
|
var b: Point = {.x = 2, .y = 3};
|
|
var p: Point = AddAndScaleGeneric(a, b, 5);
|
|
return p.x - 15;
|
|
}
|