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.
43 lines
1004 B
Rust
43 lines
1004 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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struct Counter {
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value: uint
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}
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impl Counter {
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fn new(v: uint) -> Counter {
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Counter {value: v}
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}
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fn inc<'a>(&'a mut self) -> &'a mut Counter {
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self.value += 1;
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self
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}
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fn get(&self) -> uint {
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self.value
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}
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fn get_and_inc(&mut self) -> uint {
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let v = self.value;
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self.value += 1;
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v
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}
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}
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pub fn main() {
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let v = Counter::new(22).get_and_inc();
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assert_eq!(v, 22);
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let v = Counter::new(22).inc().inc().get();
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assert_eq!(v, 24);;
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}
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