Method next_flag

rust/crates/ccusage-cli/src/arg_parser.rs:35–52

(&mut self)

    }

    pub(crate) fn next_flag(&mut self) -> Result<String, String> {
        self.pending_value = None;
        let arg = self
            .next()
            .ok_or_else(|| "Expected option but reached end of arguments".to_string())?;
        if let Some((flag, value)) = arg.split_once('=') {
            if !flag.starts_with('-') {
                return Err(format!("Expected option, got '{arg}'"));
            }
            self.pending_value = Some(value.to_string());
            return Ok(flag.to_string());
        }
        if arg.starts_with('-') {
            Ok(arg)
        } else {
            Err(format!("Expected option, got '{arg}'"))
        }
    }

    pub(crate) fn value_for(&mut self, flag: &str) -> Result<String, String> {
        if let Some(value) = self.pending_value.take() {