19     sign: Sign,
24 enum Sign {  enum
69                 Sign::Negative => {  in insert_next()
72                         discriminant.sign = Sign::Positive;  in insert_next()
76                 Sign::Positive => {  in insert_next()
121                     Sign::Positive => Sign::Negative,  in expr_to_discriminant()
122                     Sign::Negative => Sign::Positive,  in expr_to_discriminant()
155             sign: Sign::Positive,  in zero()
162             sign: Sign::Positive,  in pos()
170                 Sign::Negative  in neg()
172                 Sign::Positive  in neg()
186         if self.sign == Sign::Negative {  in fmt()
195         if self.sign == Sign::Negative {  in to_tokens()
208             Sign::Negative  in from_str()
210             Sign::Positive  in from_str()
224         use self::Sign::{Negative, Positive};  in cmp()