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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Diagnostics;
namespace System.Reflection.Metadata
{
/// <summary>
/// Scope of local variables and constants. Stored in debug metadata.
/// </summary>
/// <remarks>
/// See https://github.com/dotnet/runtime/blob/main/src/libraries/System.Reflection.Metadata/specs/PortablePdb-Metadata.md#localscope-table-0x32.
/// </remarks>
public readonly struct LocalScope
{
private readonly MetadataReader _reader;
// Workaround: JIT doesn't generate good code for nested structures, so use RowId.
private readonly int _rowId;
internal LocalScope(MetadataReader reader, LocalScopeHandle handle)
{
Debug.Assert(reader != null);
Debug.Assert(!handle.IsNil);
_reader = reader;
_rowId = handle.RowId;
}
private LocalScopeHandle Handle => LocalScopeHandle.FromRowId(_rowId);
public MethodDefinitionHandle Method => _reader.LocalScopeTable.GetMethod(_rowId);
public ImportScopeHandle ImportScope => _reader.LocalScopeTable.GetImportScope(Handle);
public int StartOffset => _reader.LocalScopeTable.GetStartOffset(_rowId);
public int Length => _reader.LocalScopeTable.GetLength(_rowId);
public int EndOffset => _reader.LocalScopeTable.GetEndOffset(_rowId);
public LocalVariableHandleCollection GetLocalVariables()
{
return new LocalVariableHandleCollection(_reader, Handle);
}
public LocalConstantHandleCollection GetLocalConstants()
{
return new LocalConstantHandleCollection(_reader, Handle);
}
public LocalScopeHandleCollection.ChildrenEnumerator GetChildren()
{
return new LocalScopeHandleCollection.ChildrenEnumerator(_reader, _rowId);
}
}
}
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