mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-25 09:00:11 +01:00
Geoff Romer
d177a08e01
Prior to this change, `__await` would make a deep copy of the continuation stack, but shallow-copy the individual stack frames within it. As a result, continuations appeared to have shallow semantics so long as the continuation stack had only a single frame. This change also removes an obsolete test from the brief period when we intended continuations to have deep-copy semantics, which has been passing basically by accident.
34 lines
811 B
Plaintext
34 lines
811 B
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: executable_semantics %s 2>&1 | \
|
|
// RUN: FileCheck --match-full-lines --allow-unused-prefixes=false %s
|
|
// RUN: executable_semantics --trace %s 2>&1 | \
|
|
// RUN: FileCheck --match-full-lines --allow-unused-prefixes %s
|
|
// AUTOUPDATE: executable_semantics %s
|
|
// CHECK: result: 3
|
|
|
|
package ExecutableSemanticsTest api;
|
|
|
|
// Assignment for continuations is shallow, so `k2` refers to the same
|
|
// continuation as `k1`.
|
|
|
|
var x: i32 = 0;
|
|
|
|
fn Foo() {
|
|
x = x + 1;
|
|
__await;
|
|
x = x + 2;
|
|
}
|
|
|
|
fn main() -> i32 {
|
|
__continuation k1 {
|
|
Foo();
|
|
}
|
|
var k2: __Continuation = k1;
|
|
__run k1;
|
|
__run k2;
|
|
return x;
|
|
}
|