Function parse_string

src/string.rs:57–96

(text: &str)

#[cfg(feature = "cst")]
pub fn parse_string(text: &str) -> Result<Cow<'_, str>, ParseStringError> {
  struct StringCharProvider<'a> {
    text: &'a str,
    byte_index: usize,
    current_char: Option<char>,
    chars: std::str::Chars<'a>,
  }

  impl<'a> CharProvider<'a> for StringCharProvider<'a> {
    fn current_char(&mut self) -> Option<char> {
      self.current_char
    }

    fn byte_index(&self) -> usize {
      self.byte_index
    }

    fn move_next_char(&mut self) -> Option<char> {
      if let Some(current_char) = self.current_char {
        self.byte_index += current_char.len_utf8();
      }
      self.current_char = self.chars.next();
      self.current_char
    }

    fn text(&self) -> &'a str {
      self.text
    }
  }

  let mut chars = text.chars();
  let mut provider = StringCharProvider {
    text,
    byte_index: 0,
    current_char: chars.next(),
    chars,
  };

  parse_string_with_char_provider(&mut provider)
}

pub fn parse_string_with_char_provider<'a, T: CharProvider<'a>>(
  chars: &mut T,