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.
30 lines
902 B
Rust
30 lines
902 B
Rust
// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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use std::cast::transmute;
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mod rusti {
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extern "rust-intrinsic" {
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pub fn init<T>() -> T;
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pub fn move_val_init<T>(dst: &mut T, src: T);
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}
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}
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pub fn main() {
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unsafe {
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let x = ~1;
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let mut y = rusti::init();
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let mut z: *uint = transmute(&x);
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rusti::move_val_init(&mut y, x);
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assert_eq!(*y, 1);
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assert_eq!(*z, 0); // `x` is nulled out, not directly visible
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}
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}
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