Function libreda_lefdef::common::read_rect

pub fn read_rect<T: FromStr, I>(
    tokens: &mut Tokenized<I, LefDefLexer>
) -> Result<((T, T), (T, T)), LefDefParseError>where
    I: Iterator<Item = char> + PeekingNext,

Read a rectangle of the form ( x1 y1 ) ( x2 y2 ).