Method parse_subject

parser/src/parser/parser.rs:728–730

This is inaccuracy, but I don't know how the grammar should be

(&mut self)

    // This is inaccuracy, but I don't know how
    // the grammar should be
    fn parse_subject(&mut self) -> Result<Expression, ParsingError> {
        self.parse_star_named_expressions()
    }

    // star named expressions is similar to starred expression
    // but it does not accept expression as a value