是枚举到枚举拳击还是只是类型转换
Is enum to Enum boxing or just type casting
我想知道转换为枚举是否会封装枚举
所以我应该写 expression bodied 成员来减小我的对象的大小。
public Fruit FruitType => (Fruit) Type; // unboxing?
public override Enum Type => (Fruit) (Data[0] & 0xF0); // boxing?
或者有属性防止装箱和拆箱？
public Fruit FruitType => (Fruit) (Data[0] & 0xF0);
public override Enum Type { get; } = (Fruit) (Data[0] & 0xF0); // assigned once.
假设我有数千个实例。这个属性被使用了大约6万次。
是的，值被装箱了。
the C# spec 的第 4.3.1 节 "Boxing conversions" 指出：
A boxing conversion permits a value-type to be implicitly converted to a reference-type. The following boxing conversions exist:
[...]
- From any enum-type to the type
System.Enum.
[...]
我想知道转换为枚举是否会封装枚举
所以我应该写 expression bodied 成员来减小我的对象的大小。
public Fruit FruitType => (Fruit) Type; // unboxing?
public override Enum Type => (Fruit) (Data[0] & 0xF0); // boxing?
或者有属性防止装箱和拆箱？
public Fruit FruitType => (Fruit) (Data[0] & 0xF0);
public override Enum Type { get; } = (Fruit) (Data[0] & 0xF0); // assigned once.
假设我有数千个实例。这个属性被使用了大约6万次。
是的，值被装箱了。
the C# spec 的第 4.3.1 节 "Boxing conversions" 指出：
A boxing conversion permits a value-type to be implicitly converted to a reference-type. The following boxing conversions exist:
[...]
- From any enum-type to the type
System.Enum.[...]