mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-24 18:50:09 +01:00
Adrien Leravat
026c4b9dc3
Addresses comments from this discussion: https://github.com/carbon-language/carbon-lang/pull/2460#discussion_r1046444433 Features: * Move subtyping logic from Interpreter to TypeChecker, exposing subtyping as a series of access to `.base`. * Excludes function parameter conversion, which is still done in ::Convert due to parameters conversion being handled differently. Changes: * Add new `class BaseAccessExpression : public MemberAccessExpression`, allowing rewrites * Handle `BaseAccessExpression` expression type in Interpreter * Move subtyping logic to `TypeChecker::ImplicitlyConvert`
45 lines
880 B
Plaintext
45 lines
880 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: Foo(c1): 1
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// CHECK:STDOUT: Foo(c2): 1
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// CHECK:STDOUT: Foo(d): 1
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// CHECK:STDOUT: Foo(&e): 1
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// CHECK:STDOUT: result: 0
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package ExplorerTest api;
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base class C {
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var val: i32;
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}
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base class D extends C {
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var val: i32;
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}
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class E extends D {
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var val: i32;
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}
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fn Foo(c: C*) -> i32 {
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return (*c).val;
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}
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fn Main() -> i32 {
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var e: E = { .val = 3, .base = {.val = 2,.base = {.val = 1}}};
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var d: D* = &e;
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var c1: C* = &e;
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var c2: C* = d;
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Print("Foo(c1): {0}", Foo(c1));
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Print("Foo(c2): {0}", Foo(c2));
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Print("Foo(d): {0}", Foo(d));
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Print("Foo(&e): {0}", Foo(&e));
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return 0;
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}
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