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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.
// See the LICENSE file in the project root for more information.
using System.Collections.Immutable;
using System.Diagnostics;
using System.Threading;
using Roslyn.Utilities;
namespace Microsoft.CodeAnalysis.CSharp.Symbols.PublicModel
{
internal sealed class ArrayTypeSymbol : TypeSymbol, IArrayTypeSymbol
{
private readonly Symbols.ArrayTypeSymbol _underlying;
private ITypeSymbol? _lazyElementType;
public ArrayTypeSymbol(Symbols.ArrayTypeSymbol underlying, CodeAnalysis.NullableAnnotation nullableAnnotation)
: base(nullableAnnotation)
{
RoslynDebug.Assert(underlying is object);
_underlying = underlying;
}
protected override ITypeSymbol WithNullableAnnotation(CodeAnalysis.NullableAnnotation nullableAnnotation)
{
Debug.Assert(nullableAnnotation != _underlying.DefaultNullableAnnotation);
Debug.Assert(nullableAnnotation != this.NullableAnnotation);
return new ArrayTypeSymbol(_underlying, nullableAnnotation);
}
internal override CSharp.Symbol UnderlyingSymbol => _underlying;
internal override Symbols.TypeSymbol UnderlyingTypeSymbol => _underlying;
internal override Symbols.NamespaceOrTypeSymbol UnderlyingNamespaceOrTypeSymbol => _underlying;
int IArrayTypeSymbol.Rank => _underlying.Rank;
bool IArrayTypeSymbol.IsSZArray => _underlying.IsSZArray;
ImmutableArray<int> IArrayTypeSymbol.LowerBounds => _underlying.LowerBounds;
ImmutableArray<int> IArrayTypeSymbol.Sizes => _underlying.Sizes;
ITypeSymbol IArrayTypeSymbol.ElementType
{
get
{
if (_lazyElementType is null)
{
Interlocked.CompareExchange(ref _lazyElementType, _underlying.ElementTypeWithAnnotations.GetPublicSymbol(), null);
}
return _lazyElementType;
}
}
CodeAnalysis.NullableAnnotation IArrayTypeSymbol.ElementNullableAnnotation
{
get
{
return _underlying.ElementTypeWithAnnotations.ToPublicAnnotation();
}
}
ImmutableArray<CustomModifier> IArrayTypeSymbol.CustomModifiers => _underlying.ElementTypeWithAnnotations.CustomModifiers;
bool IArrayTypeSymbol.Equals(IArrayTypeSymbol? other)
{
return this.Equals(other as ArrayTypeSymbol, CodeAnalysis.SymbolEqualityComparer.Default);
}
#region ISymbol Members
protected override void Accept(SymbolVisitor visitor)
{
visitor.VisitArrayType(this);
}
protected override TResult? Accept<TResult>(SymbolVisitor<TResult> visitor)
where TResult : default
{
return visitor.VisitArrayType(this);
}
protected override TResult Accept<TArgument, TResult>(SymbolVisitor<TArgument, TResult> visitor, TArgument argument)
{
return visitor.VisitArrayType(this, argument);
}
#endregion
}
}
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