67 lines
1.4 KiB
Rust
67 lines
1.4 KiB
Rust
// Copyright 2014-2018 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution.
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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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#![allow(unused)]
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fn main() {
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mut_range_bound_upper();
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mut_range_bound_lower();
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mut_range_bound_both();
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mut_range_bound_no_mutation();
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immut_range_bound();
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mut_borrow_range_bound();
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immut_borrow_range_bound();
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}
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fn mut_range_bound_upper() {
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let mut m = 4;
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for i in 0..m { m = 5; } // warning
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}
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fn mut_range_bound_lower() {
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let mut m = 4;
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for i in m..10 { m *= 2; } // warning
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}
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fn mut_range_bound_both() {
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let mut m = 4;
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let mut n = 6;
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for i in m..n { m = 5; n = 7; } // warning (1 for each mutated bound)
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}
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fn mut_range_bound_no_mutation() {
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let mut m = 4;
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for i in 0..m { continue; } // no warning
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}
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fn mut_borrow_range_bound() {
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let mut m = 4;
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for i in 0..m {
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let n = &mut m; // warning
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*n += 1;
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}
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}
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fn immut_borrow_range_bound() {
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let mut m = 4;
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for i in 0..m {
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let n = &m; // should be no warning?
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}
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}
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fn immut_range_bound() {
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let m = 4;
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for i in 0..m { continue; } // no warning
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}
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