Method from_format_args

crates/core/src/error/macros.rs:349–365

(args: fmt::Arguments<'_>)

        /// Only for use by the `format_err!` macro.
        #[doc(hidden)]
        pub fn from_format_args(args: fmt::Arguments<'_>) -> Self {
            if let Some(s) = args.as_str() {
                return Self::msg(s);
            }

            let mut f = Formatter::default();
            match write(&mut f, args) {
                Ok(()) => {
                    debug_assert!(f.oom.is_none());
                    Error::msg(f.message)
                }
                Err(fmt_error) => match f.oom {
                    Some(oom) => Error::new(oom),
                    None => Error::new(fmt_error),
                },
            }
        }
    }
}