DragonECS/src/Entities/ent.cs

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2023-04-08 05:50:44 +08:00
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
namespace DCFApixels.DragonECS
{
#pragma warning disable CS0660, CS0661
/// <summary>Single frame entity identifier</summary>
[StructLayout(LayoutKind.Sequential, Pack = 4, Size = 4)]
public readonly ref partial struct ent
{
internal readonly int id;
[MethodImpl(MethodImplOptions.AggressiveInlining)]
internal ent(int id) => this.id = id;
public static explicit operator ent(int id) => new ent(id);
public static explicit operator int(ent entityID) => entityID.id;
public static bool operator ==(ent a, ent b) => a.id == b.id;
public static bool operator !=(ent a, ent b) => a.id != b.id;
public static bool operator ==(ent a, Null? _) => a.id == 0;
public static bool operator ==(Null? _, ent b) => b.id == 0;
public static bool operator !=(ent a, Null? _) => a.id != 0;
public static bool operator !=(Null? _, ent b) => b.id != 0;
public struct Null { }
}
}