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56 lines
1.3 KiB
Rust
56 lines
1.3 KiB
Rust
use crate::{ErrorKind, Result};
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use std::fmt;
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use std::ops::Deref;
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/// String that represents a single line in a playlist file.
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///
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/// See: [4.1. Definition of a Playlist]
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///
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/// [4.1. Definition of a Playlist]: https://tools.ietf.org/html/rfc8216#section-4.1
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#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
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pub struct SingleLineString(String);
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impl SingleLineString {
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/// Makes a new `SingleLineString` instance.
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///
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/// # Errors
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///
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/// If the given string contains any control characters,
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/// this function will return an error which has the kind `ErrorKind::InvalidInput`.
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pub fn new<T: Into<String>>(s: T) -> Result<Self> {
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let s = s.into();
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track_assert!(!s.chars().any(|c| c.is_control()), ErrorKind::InvalidInput);
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Ok(SingleLineString(s))
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}
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}
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impl Deref for SingleLineString {
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type Target = str;
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fn deref(&self) -> &Self::Target {
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&self.0
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}
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}
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impl AsRef<str> for SingleLineString {
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fn as_ref(&self) -> &str {
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&self.0
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}
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}
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impl fmt::Display for SingleLineString {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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self.0.fmt(f)
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}
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}
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#[cfg(test)]
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mod test {
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use super::*;
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#[test]
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fn single_line_string() {
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assert!(SingleLineString::new("foo").is_ok());
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assert!(SingleLineString::new("b\rar").is_err());
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}
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}
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