anchor.diff:      }
     }
   
  -  final List<Parser<ExpressionResultInfix>> _right = [];
  +  final List<Parser<ExpressionResultInfix<T, void>>> _right = [];
   
     /// Adds a left-associative operator [parser]. Evaluates the [callback] with
     /// the parsed `left` term, `operator`, and `right` term.
  
positive.code:     }
    }
  
    final List<Parser<ExpressionResultPostfix>> _postfix = [];
  
    /// Adds a right-associative operator [parser]. Evaluates the [callback] with
    /// the parsed `left` term, `operator`, and `right` term.
  
negative.code:     }
    }
  
    final List<Parser<ExpressionResultInfix<T, void>>> _left = [];
  
    // Internal helper to build the group of parsers.
    @internal
  