38 lines
975 B
Rust
38 lines
975 B
Rust
use std::str::FromStr;
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use pyo3::{exceptions::PyValueError, PyErr};
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use smol_str::SmolStr;
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use snafu::Snafu;
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#[derive(Debug, Clone, derive_more::Display)]
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pub struct Slug(SmolStr);
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#[derive(Debug, Clone, Snafu)]
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#[snafu(display("expected a lowercase ASCII alphabetical character (i.e. a through z) or a digit (i.e. 0 through 9) or an underscore (i.e. _) but encountered {encountered}"))]
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pub struct SlugParsingError {
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encountered: char,
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}
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impl From<SlugParsingError> for PyErr {
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fn from(error: SlugParsingError) -> Self {
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PyValueError::new_err(error.to_string())
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}
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}
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impl FromStr for Slug {
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type Err = SlugParsingError;
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fn from_str(s: &str) -> Result<Self, Self::Err> {
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for c in s.chars() {
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match c {
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'a'..='z' => {}
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'0'..='9' => {}
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'_' => {}
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_ => return Err(SlugParsingError { encountered: c }),
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}
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}
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Ok(Self(s.into()))
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}
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}
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