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Add BoolExt trait with flip method

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This commit is contained in:
Laurenz 2021-09-14 12:27:21 +02:00
parent 18190f377a
commit 87e776fceb
2 changed files with 15 additions and 2 deletions
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5
src/eval/walk.rs
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@ -5,6 +5,7 @@ use crate::diag::TypResult;
use crate::geom::Gen;
use crate::layout::{ParChild, ParNode, StackChild, StackNode};
use crate::syntax::*;
use crate::util::BoolExt;
/// Walk a syntax node and fill the currently built template.
pub trait Walk {
@ -27,8 +28,8 @@ impl Walk for SyntaxNode {
Self::Space => ctx.template.space(),
Self::Linebreak(_) => ctx.template.linebreak(),
Self::Parbreak(_) => ctx.template.parbreak(),
Self::Strong(_) => ctx.template.modify(|s| s.font_mut().strong ^= true),
Self::Emph(_) => ctx.template.modify(|s| s.font_mut().emph ^= true),
Self::Strong(_) => ctx.template.modify(|s| s.font_mut().strong.flip()),
Self::Emph(_) => ctx.template.modify(|s| s.font_mut().emph.flip()),
Self::Text(text) => ctx.template.text(text),
Self::Raw(raw) => raw.walk(ctx)?,
Self::Heading(heading) => heading.walk(ctx)?,

12
src/util/mod.rs
View File

@ -11,6 +11,18 @@ use std::cmp::Ordering;
use std::ops::Range;
use std::path::{Component, Path, PathBuf};
/// Additional methods for booleans.
pub trait BoolExt {
/// Toggle the value of the bool in place.
fn flip(&mut self);
}
impl BoolExt for bool {
fn flip(&mut self) {
*self = !*self;
}
}
/// Additional methods for options.
pub trait OptionExt<T> {
/// Replace `self` with `other` if `self` is `Some`.