41 lines
978 B
Rust
41 lines
978 B
Rust
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// Copyright 2015 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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#[inline]
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pub fn prev_char(s: &str, mut i: usize) -> usize {
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if i == 0 { return 0; }
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i -= 1;
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while !s.is_char_boundary(i) {
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i -= 1;
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}
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i
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}
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#[inline]
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pub fn next_char(s: &str, mut i: usize) -> usize {
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if i >= s.len() { return s.len(); }
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while !s.is_char_boundary(i) {
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i += 1;
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}
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i
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}
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#[inline]
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pub fn make_indent(width: usize) -> String {
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let mut indent = String::with_capacity(width);
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for _ in 0..width {
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indent.push(' ')
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}
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indent
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}
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