ModuleRequires.cs

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using System;
 
using IKVM.ByteCode;
 
namespace IKVM.CoreLib.Modules
{
 
    internal readonly struct ModuleRequires : IComparable<ModuleRequires>
    {
 
        readonly ModuleRequiresFlag _modifiers;
        readonly string _name;
        readonly ModuleVersion _version;
 
        public ModuleRequires(ModuleRequiresFlag modifiers, string name, ModuleVersion version)
        {
            _modifiers = modifiers;
            _name = name ?? throw new ArgumentNullException(nameof(name));
            _version = version;
        }
 
        public readonly ModuleRequiresFlag Modifiers => _modifiers;
 
        public readonly string Name => _name;
 
        public readonly ModuleVersion Version => _version;
 
        public readonly int CompareTo(ModuleRequires other)
        {
            int c = _name.CompareTo(other._name);
            if (c != 0)
                return c;
 
            // version
            c = _version.CompareTo(other._version);
            if (c != 0)
                return c;
 
            // modifiers
            c = _modifiers.CompareTo(other._modifiers);
            if (c != 0)
                return c;
 
            return 0;
        }
 
        public readonly override bool Equals(object? obj)
        {
            return obj is ModuleRequires other && Equals(other);
        }
 
        public readonly bool Equals(ModuleRequires other)
        {
            return _modifiers == other._modifiers && _name == other._name && _version == other._version;
        }
 
        public readonly override int GetHashCode()
        {
            var hc = new HashCode();
            hc.Add(_modifiers);
            hc.Add(_name);
            if (_version.IsValid)
                hc.Add(_version);
 
            return hc.ToHashCode();
        }
 
    }
 
}