// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
 
using System.Diagnostics;
using Microsoft.CodeAnalysis.Shared.Extensions;
 
namespace Microsoft.CodeAnalysis.InvertIf;
 
internal abstract partial class AbstractInvertIfCodeRefactoringProvider<
    TSyntaxKind, TStatementSyntax, TIfStatementSyntax, TEmbeddedStatement>
{
    protected readonly struct StatementRange
    {
        public readonly TStatementSyntax FirstStatement;
        public readonly TStatementSyntax LastStatement;
 
        public StatementRange(TStatementSyntax firstStatement, TStatementSyntax lastStatement)
        {
            Debug.Assert(firstStatement != null);
            Debug.Assert(lastStatement != null);
            Debug.Assert(firstStatement.Parent != null);
            Debug.Assert(firstStatement.Parent == lastStatement.Parent);
            Debug.Assert(firstStatement.SpanStart <= lastStatement.SpanStart);
            FirstStatement = firstStatement;
            LastStatement = lastStatement;
        }
 
        public bool IsEmpty => FirstStatement == null;
        public SyntaxNode Parent => FirstStatement.GetRequiredParent();
    }
}