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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>
40 lines
1.0 KiB
Plaintext
40 lines
1.0 KiB
Plaintext
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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// RUN: %{explorer} %s 2>&1 | \
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// RUN: %{FileCheck} --match-full-lines --allow-unused-prefixes=false %s
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// RUN: %{explorer} --parser_debug --trace_file=- %s 2>&1 | \
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// RUN: %{FileCheck} --match-full-lines --allow-unused-prefixes %s
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// AUTOUPDATE: %{explorer} %s
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// CHECK: result: 0
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package ExplorerTest api;
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interface AddWith(T:! Type) {
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fn Op[me: Self](b: T) -> Self;
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}
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class Point {
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var x: i32;
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var y: i32;
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}
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// Allowed: `Self` means `Point` after `as`
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impl Point as AddWith(Self) {
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fn Op[me: Point](b: Point) -> Point {
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return {.x = me.x + b.x, .y = me.y + b.y};
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}
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}
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fn DoAddGeneric[T:! Type, U:! AddWith(T)](a: U, b: T) -> U {
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return a.Op(b);
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}
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fn Main() -> i32 {
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var a: Point = {.x = 2, .y = 1};
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var b: Point = {.x = 4, .y = 2};
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var p: Point = DoAddGeneric(a, b);
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return p.x - p.y - 3;
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}
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