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https://github.com/carbon-language/carbon-lang.git
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Richard Smith
4daaa4866f
Also make minor updates to the skeletal design in docs/design/name_lookup.md following #2113, as there are no longer any prelude names that are made available to unqualified name lookup by default. Add `type` to the keyword list in docs/design/lexical_conventions/words.md, following #2360.
47 lines
1.1 KiB
Plaintext
47 lines
1.1 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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// AUTOUPDATE
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// RUN: %{explorer-run}
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// RUN: %{explorer-run-trace}
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// CHECK:STDOUT: result: 0
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package ExplorerTest api;
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interface Vector {
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fn Zero() -> Self;
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fn Add[self: Self](b: Self) -> Self;
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fn Scale[self: Self](v: i32) -> Self;
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}
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class Point(T:! type) {
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var x: T;
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var y: T;
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}
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// Can implement `Vector` for just `Point(i32)`, not all `Point(T)`.
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external impl Point(i32) as Vector {
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fn Zero() -> Point(i32) {
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return {.x = 0, .y = 0};
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}
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fn Add[self: Point(i32)](b: Point(i32)) -> Point(i32) {
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return {.x = self.x + b.x, .y = self.y + b.y};
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}
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fn Scale[self: Point(i32)](v: i32) -> Point(i32) {
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return {.x = self.x * v, .y = self.y * v};
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}
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}
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fn AddAndScaleGeneric[T:! Vector](a: T, s: i32) -> T {
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return a.Add(T.Zero()).Scale(s);
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}
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fn Main() -> i32 {
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var a: Point(i32) = {.x = 2, .y = 1};
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var p: Point(i32) = AddAndScaleGeneric(a, 5);
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return p.x - 10;
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}
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