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