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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
{
public readonly struct GenericParameterConstraint
{
private readonly MetadataReader _reader;
// Workaround: JIT doesn't generate good code for nested structures, so use RowId.
private readonly int _rowId;
internal GenericParameterConstraint(MetadataReader reader, GenericParameterConstraintHandle handle)
{
Debug.Assert(reader != null);
Debug.Assert(!handle.IsNil);
_reader = reader;
_rowId = handle.RowId;
}
private GenericParameterConstraintHandle Handle
{
get { return GenericParameterConstraintHandle.FromRowId(_rowId); }
}
/// <summary>
/// The constrained <see cref="GenericParameterHandle"/>.
/// </summary>
/// <remarks>
/// Corresponds to Owner field of GenericParamConstraint table in ECMA-335 Standard.
/// </remarks>
public GenericParameterHandle Parameter
{
get { return _reader.GenericParamConstraintTable.GetOwner(Handle); }
}
/// <summary>
/// Handle (<see cref="TypeDefinitionHandle"/>, <see cref="TypeReferenceHandle"/>, or <see cref="TypeSpecificationHandle"/>)
/// specifying from which type this generic parameter is constrained to derive,
/// or which interface this generic parameter is constrained to implement.
/// </summary>
/// <remarks>
/// Corresponds to Constraint field of GenericParamConstraint table in ECMA-335 Standard.
/// </remarks>
public EntityHandle Type
{
get { return _reader.GenericParamConstraintTable.GetConstraint(Handle); }
}
public CustomAttributeHandleCollection GetCustomAttributes()
{
return new CustomAttributeHandleCollection(_reader, Handle);
}
}
}
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