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carbon-lang/executable_semantics/testdata/experimental_continuation9.carbon
T
Jon Meow a03536a196 Add syntax for package and library (#792)
Doesn't add much logic, only takes advantage of parser structure for the ordering enforcement.

Note import_nonexistent tests should probably fail, but writing import tests needs a chain of functionality, and I figured I'd just start adding some to validate the syntax (not adding existent imports because that'd require multi-file structure).
2021-09-02 16:01:15 -07:00

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// 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
package ExecutableSemanticsTest api;
// Test that the read from x triggers an error because x is dead.
// This test also demonstrates how by-reference free-variable capture
// is dangerous and can happen inside continuations.
fn capture() -> __Continuation {
var x: i32 = 1;
__continuation k {
var y: i32 = x;
}
return k;
}
fn main() -> i32 {
var k: __Continuation = capture();
__run k; // error, lifetime of x is over
return 0;
}