C# 没有预处理,我不想为所有需要此约束的接口定义“struct、IComparable、IFormattable、IConvertible”。我需要的是这样的:
几个通用接口 where 子句的命名约束“IMyItemConstraint” :
public interface IProperty2Enum<T>
: IEnumerable<T>
where T : IMyItemConstraint { } // <--- here
public interface IMyCollection2<T>
: IEnumerable<T>, INotifyCollectionChanged, INotifyPropertyChanged
where T : IMyItemConstraint { } // <--- here
public interface IMyObservableCollection2<T>
: IEnumerable<T>, INotifyCollectionChanged, INotifyPropertyChanged
where T : IMyItemConstraint { } // <--- here
我试图定义一个名称“IMyItemConstraint”,但出现错误 CS####:
public interface IMyItemConstraint
: struct, IComparable, IFormattable, IConvertible { } // CS1031: Type expected
public interface IMyItemConstraint : where IMyItemConstraint
: struct, IComparable, IFormattable, IConvertible { } // CS1031: Type expected
public interface IMyItemConstraint<T> where T // This does not help:
: struct, IComparable, IFormattable, IConvertible { }
是否可以为多个接口(合同)的通用接口 where 子句定义命名约束?