| |
}
|
| |
|
| |
/// Return a line with a single space between the given labels.
|
| + |
// TODO: Make this impl trivial once [`Iterator::intersperse`] is stable.
|
| |
pub fn spaced(items: impl IntoIterator<Item = Label>) -> Self {
|
| - |
let mut line = Self::default();
|
| - |
for item in items.into_iter() {
|
| - |
// Don't create spaces around empty labels.
|
| - |
if item.is_blank() {
|
| - |
continue;
|
| - |
}
|
| + |
let iter = items.into_iter();
|
| + |
|
| + |
let mut line = Self {
|
| + |
items: Vec::with_capacity({
|
| + |
let (min, max) = iter.size_hint();
|
| + |
let likely = max.unwrap_or(min);
|
| + |
|
| + |
// Technically (likely + (likely - 1)), but we push the last space before
|
| + |
// we pop it again, so we need that additional space anyways.
|
| + |
likely * 2
|
| + |
}),
|
| + |
};
|
| + |
|
| + |
// Don't create spaces around empty labels.
|
| + |
for item in iter.filter(|i| !i.is_blank()) {
|
| |
line.push(item);
|
| |
line.push(Label::space());
|
| |
}
|