// 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;

namespace Microsoft.CodeAnalysis.CodeGeneration;

internal sealed class CodeGenerationPointerTypeSymbol(ITypeSymbol pointedAtType) : CodeGenerationTypeSymbol(null, null, default, Accessibility.NotApplicable, default, string.Empty, SpecialType.None, NullableAnnotation.None), IPointerTypeSymbol
{
    public ITypeSymbol PointedAtType { get; } = pointedAtType;

    protected override CodeGenerationTypeSymbol CloneWithNullableAnnotation(NullableAnnotation nullableAnnotation)
    {
        // We ignore the nullableAnnotation parameter because pointer types can't be nullable.
        return new CodeGenerationPointerTypeSymbol(this.PointedAtType);
    }

    public override TypeKind TypeKind => TypeKind.Pointer;

    public override SymbolKind Kind => SymbolKind.PointerType;

    public override void Accept(SymbolVisitor visitor)
        => visitor.VisitPointerType(this);

    public override TResult? Accept<TResult>(SymbolVisitor<TResult> visitor)
        where TResult : default
        => visitor.VisitPointerType(this);

    public override TResult Accept<TArgument, TResult>(SymbolVisitor<TArgument, TResult> visitor, TArgument argument)
        => visitor.VisitPointerType(this, argument);

    public ImmutableArray<CustomModifier> CustomModifiers
    {
        get
        {
            return [];
        }
    }
}