49 lines
1.2 KiB
Rust
49 lines
1.2 KiB
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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fn match_imm_box(v: &const @Option<int>) -> int {
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match *v {
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@Some(ref i) => {*i}
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@None => {0}
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}
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}
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fn match_const_box(v: &const @const Option<int>) -> int {
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match *v {
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@Some(ref i) => { *i } // ok because this is pure
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@None => {0}
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}
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}
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pure fn pure_process(_i: int) {}
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fn match_const_box_and_do_pure_things(v: &const @const Option<int>) {
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match *v {
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@Some(ref i) => {
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pure_process(*i)
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}
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@None => {}
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}
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}
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fn process(_i: int) {}
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fn match_const_box_and_do_bad_things(v: &const @const Option<int>) {
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match *v {
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@Some(ref i) => { //~ ERROR illegal borrow unless pure
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process(*i) //~ NOTE impure due to access to impure function
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}
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@None => {}
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}
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}
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fn main() {
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}
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