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Add typst_utils::display

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This commit is contained in:
Laurenz 2025-06-19 17:21:00 +02:00
parent 4580daf307
commit 15302dbe7a
1 changed files with 20 additions and 1 deletions
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21
crates/typst-utils/src/lib.rs
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@ -23,7 +23,7 @@ pub use self::scalar::Scalar;
#[doc(hidden)] #[doc(hidden)]
pub use once_cell; pub use once_cell;
use std::fmt::{Debug, Formatter}; use std::fmt::{Debug, Display, Formatter};
use std::hash::Hash; use std::hash::Hash;
use std::iter::{Chain, Flatten, Rev}; use std::iter::{Chain, Flatten, Rev};
use std::num::{NonZeroU32, NonZeroUsize}; use std::num::{NonZeroU32, NonZeroUsize};
@ -52,6 +52,25 @@ where
Wrapper(f) Wrapper(f)
} }
/// Turn a closure into a struct implementing [`Display`].
pub fn display<F>(f: F) -> impl Display
where
F: Fn(&mut Formatter) -> std::fmt::Result,
{
struct Wrapper<F>(F);
impl<F> Display for Wrapper<F>
where
F: Fn(&mut Formatter) -> std::fmt::Result,
{
fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
self.0(f)
}
}
Wrapper(f)
}
/// Calculate a 128-bit siphash of a value. /// Calculate a 128-bit siphash of a value.
pub fn hash128<T: Hash + ?Sized>(value: &T) -> u128 { pub fn hash128<T: Hash + ?Sized>(value: &T) -> u128 {
let mut state = SipHasher13::new(); let mut state = SipHasher13::new();