// 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.
 
#nullable disable
 
using System.Collections.Generic;
using Microsoft.CodeAnalysis.Emit;
using Roslyn.Utilities;
 
namespace Microsoft.CodeAnalysis.CSharp.Emit
{
    internal abstract class TypeMemberReference : Cci.ITypeMemberReference
    {
        protected abstract Symbol UnderlyingSymbol { get; }
 
        public virtual Cci.ITypeReference GetContainingType(EmitContext context)
        {
            PEModuleBuilder moduleBeingBuilt = (PEModuleBuilder)context.Module;
            return moduleBeingBuilt.Translate(UnderlyingSymbol.ContainingType, (CSharpSyntaxNode)context.SyntaxNode, context.Diagnostics);
        }
 
        string Cci.INamedEntity.Name
        {
            get
            {
                return UnderlyingSymbol.MetadataName;
            }
        }
 
        /// <remarks>
        /// Used only for testing.
        /// </remarks>
        public override string ToString()
        {
            return UnderlyingSymbol.ToDisplayString(SymbolDisplayFormat.ILVisualizationFormat);
        }
 
        IEnumerable<Cci.ICustomAttribute> Cci.IReference.GetAttributes(EmitContext context)
        {
            return SpecializedCollections.EmptyEnumerable<Cci.ICustomAttribute>();
        }
 
        public abstract void Dispatch(Cci.MetadataVisitor visitor);
 
        Cci.IDefinition Cci.IReference.AsDefinition(EmitContext context)
        {
            return null;
        }
 
        CodeAnalysis.Symbols.ISymbolInternal Cci.IReference.GetInternalSymbol() => UnderlyingSymbol;
 
        public sealed override bool Equals(object obj)
        {
            // It is not supported to rely on default equality of these Cci objects, an explicit way to compare and hash them should be used.
            throw Roslyn.Utilities.ExceptionUtilities.Unreachable();
        }
 
        public sealed override int GetHashCode()
        {
            // It is not supported to rely on default equality of these Cci objects, an explicit way to compare and hash them should be used.
            throw Roslyn.Utilities.ExceptionUtilities.Unreachable();
        }
    }
}