File: src\Workspaces\SharedUtilitiesAndExtensions\Compiler\Core\Services\HeaderFacts\IHeaderFacts.cs
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Project: src\src\CodeStyle\Core\Analyzers\Microsoft.CodeAnalysis.CodeStyle.csproj (Microsoft.CodeAnalysis.CodeStyle)
// 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.CodeAnalysis;
 
namespace Microsoft.CodeAnalysis.LanguageService;
 
internal interface IHeaderFacts
{
    /// <summary>
    /// <paramref name="fullHeader"/> controls how much of the type header should be considered. If <see
    /// langword="false"/> only the span up through the type name will be considered.  If <see langword="true"/>
    /// then the span through the base-list will be considered.
    /// </summary>
    bool IsOnTypeHeader(SyntaxNode root, int position, bool fullHeader, [NotNullWhen(true)] out SyntaxNode? typeDeclaration);
 
    bool IsOnPropertyDeclarationHeader(SyntaxNode root, int position, [NotNullWhen(true)] out SyntaxNode? propertyDeclaration);
    bool IsOnParameterHeader(SyntaxNode root, int position, [NotNullWhen(true)] out SyntaxNode? parameter);
    bool IsOnMethodHeader(SyntaxNode root, int position, [NotNullWhen(true)] out SyntaxNode? method);
    bool IsOnLocalFunctionHeader(SyntaxNode root, int position, [NotNullWhen(true)] out SyntaxNode? localFunction);
    bool IsOnLocalDeclarationHeader(SyntaxNode root, int position, [NotNullWhen(true)] out SyntaxNode? localDeclaration);
    bool IsOnIfStatementHeader(SyntaxNode root, int position, [NotNullWhen(true)] out SyntaxNode? ifStatement);
    bool IsOnWhileStatementHeader(SyntaxNode root, int position, [NotNullWhen(true)] out SyntaxNode? whileStatement);
    bool IsOnForeachHeader(SyntaxNode root, int position, [NotNullWhen(true)] out SyntaxNode? foreachStatement);
}