//-----------------------------------------------------------------------
// -----------------------------------------------------------------------
// file="MatrixIndex"
// Project: StgSharp
// AuthorGroup: Nitload
// Copyright (c) Nitload. All rights reserved.
//     
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
//     
// -----------------------------------------------------------------------
// -----------------------------------------------------------------------
using System;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;

namespace StgSharp.Mathematics.Numeric
{
    [StructLayout(LayoutKind.Sequential)]
    public readonly struct MatrixIndex
    {

        public readonly int Begin;
        public readonly int End;

        private MatrixIndex(int begin, int end, bool safe = false)
        {
            Begin = begin;
            End = end;
        }

        internal MatrixIndex(int begin, int end)
        {
            if (begin > end) {
                throw new ArgumentException("Begin index cannot be greater than end index.");
            }

            Begin = begin;
            End = end;
        }

        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public static implicit operator MatrixIndex((int, int) range)
        {
            return new(range.Item1, range.Item2, false);
        }

        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public static implicit operator MatrixIndex(int index)
        {
            return new(index, -1, false);
        }

    }
}