c# - 如何在 C# 中为类创建简化的赋值或默认属性

Question

我知道这是次要的，但假设我有一个类 Character 和一个类 Ability(主要是因为这就是我正在研究的)。 Class Character 有六种能力(典型的 D&D...)。基本上:

public class Character
{
    public Character()
    {
        this.Str = new Ability("Strength", "Str");
        this.Dex = new Ability("Dexterity", "Dex");
        this.Con = new Ability("Constitution", "Con");
        this.Int = new Ability("Intelligence", "Int");
        this.Wis = new Ability("Wisdom", "Wis");
        this.Cha = new Ability("Charisma", "Cha");
    }

    #region Abilities
    public Ability Str { get; set; }
    public Ability Dex { get; set; }
    public Ability Con { get; set; }
    public Ability Int { get; set; }
    public Ability Wis { get; set; }
    public Ability Cha { get; set; }
    #endregion
}

和

public class Ability
{
    public Ability()
    {
        Score = 10;
    }
    public Ability(string Name, string Abbr)
        : this()
    {
        this.Name = Name;
        this.Abbr = Abbr;
    }

    public string Name { get; set; }
    public string Abbr { get; set; }
    public int Score { get; set; }
    public int Mod
    {
        get
        {
            return (Score - 10) / 2;
        }
    }
}

在未来的代码中实际使用这些能力属性时，我希望能够默认为分数，如下所示:

//Conan hits someone
int damage = RollDice("2d6") + Conan.Str;

//evil sorcerer attack drains strength
Conan.Str = 0;

而不是:

//Conan hits someone
int damage = RollDie("2d6") + Conan.Str.Score;

//evil sorcerer attack drains strength
Conan.Str.Score = 0;

现在，第一种情况可以通过隐式转换处理:

public static implicit operator int(Ability a)
{
    return a.Score;
}

谁能帮我解决这个问题？像这样的隐式转换:

public static implicit operator Ability(int a)
{
    return new Ability(){ Score = a };
}

将替换整个属性而不仅仅是属性的分数——不是期望的结果...

Answer 1

您最多只能通过将这些方法添加到 Ability 来增加分数。

    public static Ability operator + (Ability lhs, int score)
    {
        lhs.Score += score;
        return lhs;
    }

    public static Ability operator - (Ability lhs, int score)
    {
        lhs.Score -= score;
        return lhs;
    }

    public static implicit operator int(Ability rhs)
    {
        return rhs.Score;
    }

并像这样使用它们:

    static void Main(string[] args)
    {
        Character evil = new Character(); //Str.Sccore=10

        evil.Str += 10; //cast spell for Str.Sccore=20

        evil.Str -= evil.Str; //death with Str.Sccore=0
    }