ephemeris_documents/
columns.rs

1//! A positive column count.
2
3use std::num::NonZeroUsize;
4
5use crate::error::ColumnsError;
6
7/// A column count of at least one.
8#[derive(Debug, Clone, Copy, PartialEq, Eq)]
9pub(crate) struct Columns(NonZeroUsize);
10
11impl Columns {
12    pub(crate) const fn new(columns: usize) -> Option<Self> {
13        match NonZeroUsize::new(columns) {
14            Some(columns) => Some(Self(columns)),
15            None => None,
16        }
17    }
18
19    pub(crate) const fn get(self) -> usize {
20        self.0.get()
21    }
22}
23
24impl TryFrom<usize> for Columns {
25    type Error = ColumnsError;
26
27    fn try_from(columns: usize) -> Result<Self, Self::Error> {
28        Self::new(columns).ok_or(ColumnsError::Zero)
29    }
30}

ephemeris_documents/columns.rs

ephemeris_documents/
columns.rs