mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-27 09:00:10 +01:00
Richard Smith
c8f18446f4
Allow explicit conversion from a tuple of `T1`, `T2`, ... to a tuple of `U1`, `U2`, ... if each element has an explicit conversion. Also add a comment to existing `ImplicitAs` impl for tuples explaining its purpose.
43 lines
885 B
Plaintext
43 lines
885 B
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: 2
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// CHECK:STDOUT: 3
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// CHECK:STDOUT: 4
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// CHECK:STDOUT: 5
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// CHECK:STDOUT: result: 0
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package ExplorerTest api;
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class A {
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var a: i32;
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}
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class B {
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var b: i32;
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}
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class C {
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var c: i32;
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}
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external impl A as ImplicitAs(B) {
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fn Convert[self: Self]() -> B { return {.b = self.a + 1}; }
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}
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external impl B as As(C) {
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fn Convert[self: Self]() -> C { return {.c = self.b + 2}; }
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}
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fn Main() -> i32 {
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var a: (A, A) = ({.a = 1}, {.a = 2});
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var b: (B, B) = a;
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Print("{0}", b[0].b);
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Print("{0}", b[1].b);
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var c: (C, C) = b as (C, C);
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Print("{0}", c[0].c);
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Print("{0}", c[1].c);
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return 0;
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}
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