419ac4a1b8
Major changes: - Define temporary scopes in a syntax-based way that basically defaults to the innermost statement or conditional block, except for in a `let` initializer, where we default to the innermost block. Rules are documented in the code, but not in the manual (yet). See new test run-pass/cleanup-value-scopes.rs for examples. - Refactors Datum to better define cleanup roles. - Refactor cleanup scopes to not be tied to basic blocks, permitting us to have a very large number of scopes (one per AST node). - Introduce nascent documentation in trans/doc.rs covering datums and cleanup in a more comprehensive way.
31 lines
1.0 KiB
Rust
31 lines
1.0 KiB
Rust
// copyright 2013 the rust project developers. see the copyright
|
|
// file at the top-level directory of this distribution and at
|
|
// http://rust-lang.org/copyright.
|
|
//
|
|
// licensed under the apache license, version 2.0 <license-apache or
|
|
// http://www.apache.org/licenses/license-2.0> or the mit license
|
|
// <license-mit or http://opensource.org/licenses/mit>, at your
|
|
// option. this file may not be copied, modified, or distributed
|
|
// except according to those terms.
|
|
|
|
// Test that cleanups for the RHS of shorcircuiting operators work.
|
|
|
|
use std::{os, run};
|
|
use std::io::process;
|
|
|
|
pub fn main() {
|
|
let args = os::args();
|
|
|
|
// Here, the rvalue `~"signal"` requires cleanup. Older versions
|
|
// of the code had a problem that the cleanup scope for this
|
|
// expression was the end of the `if`, and as the `~"signal"`
|
|
// expression was never evaluated, we wound up trying to clean
|
|
// uninitialized memory.
|
|
|
|
if args.len() >= 2 && args[1] == ~"signal" {
|
|
// Raise a segfault.
|
|
unsafe { *(0 as *mut int) = 0; }
|
|
}
|
|
}
|
|
|