Method prev_token

src/sql-parser/src/parser.rs:1794–1797

Push back the last one non-whitespace token. Must be called after `next_token()`, otherwise might panic. OK to call after `next_token()` indicates an EOF.

(&mut self)

    /// `next_token()`, otherwise might panic. OK to call after
    /// `next_token()` indicates an EOF.
    fn prev_token(&mut self) {
        assert!(self.index > 0);
        self.index -= 1;
    }

    /// Return the byte position within the query string at which the
    /// next token starts.