// 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.Generic;
using System.Reflection.Metadata;
using Microsoft.Cci;
using Microsoft.CodeAnalysis.Symbols;
using Roslyn.Utilities;
 
namespace Microsoft.CodeAnalysis.Emit.EditAndContinue
{
    internal sealed class DeletedSourceGenericParameter : DeletedSourceDefinition<IGenericMethodParameter>, IGenericMethodParameter
    {
        private readonly DeletedSourceMethodDefinition _method;
 
        public DeletedSourceGenericParameter(IGenericMethodParameter oldParameter, DeletedSourceMethodDefinition method, Dictionary<ITypeDefinition, DeletedSourceTypeDefinition> typesUsedByDeletedMembers)
            : base(oldParameter, typesUsedByDeletedMembers)
        {
            _method = method;
        }
 
        public IMethodDefinition DefiningMethod => _method;
 
        public bool MustBeReferenceType => OldDefinition.MustBeReferenceType;
 
        public bool MustBeValueType => OldDefinition.MustBeValueType;
 
        public bool AllowsRefLikeType => OldDefinition.AllowsRefLikeType;
 
        public bool MustHaveDefaultConstructor => OldDefinition.MustHaveDefaultConstructor;
 
        public TypeParameterVariance Variance => OldDefinition.Variance;
 
        public IGenericMethodParameter? AsGenericMethodParameter => OldDefinition.AsGenericMethodParameter;
 
        public IGenericTypeParameter? AsGenericTypeParameter => OldDefinition.AsGenericTypeParameter;
 
        public bool IsEnum => OldDefinition.IsEnum;
 
        public bool IsValueType => OldDefinition.IsValueType;
 
        public Cci.PrimitiveTypeCode TypeCode => OldDefinition.TypeCode;
 
        public TypeDefinitionHandle TypeDef => OldDefinition.TypeDef;
 
        public IGenericMethodParameterReference? AsGenericMethodParameterReference => OldDefinition.AsGenericMethodParameterReference;
 
        public IGenericTypeInstanceReference? AsGenericTypeInstanceReference => OldDefinition.AsGenericTypeInstanceReference;
 
        public IGenericTypeParameterReference? AsGenericTypeParameterReference => OldDefinition.AsGenericTypeParameterReference;
 
        public INamespaceTypeReference? AsNamespaceTypeReference => OldDefinition.AsNamespaceTypeReference;
 
        public INestedTypeReference? AsNestedTypeReference => OldDefinition.AsNestedTypeReference;
 
        public ISpecializedNestedTypeReference? AsSpecializedNestedTypeReference => OldDefinition.AsSpecializedNestedTypeReference;
 
        public string? Name => OldDefinition.Name;
 
        public ushort Index => OldDefinition.Index;
 
        IMethodReference IGenericMethodParameterReference.DefiningMethod => ((IGenericMethodParameterReference)OldDefinition).DefiningMethod;
 
        public INamespaceTypeDefinition? AsNamespaceTypeDefinition(EmitContext context)
        {
            return OldDefinition.AsNamespaceTypeDefinition(context);
        }
 
        public INestedTypeDefinition? AsNestedTypeDefinition(EmitContext context)
        {
            return OldDefinition.AsNestedTypeDefinition(context);
        }
 
        public ITypeDefinition? AsTypeDefinition(EmitContext context)
        {
            return OldDefinition.AsTypeDefinition(context);
        }
 
        public override void Dispatch(MetadataVisitor visitor)
        {
            OldDefinition.Dispatch(visitor);
        }
 
        public IEnumerable<TypeReferenceWithAttributes> GetConstraints(EmitContext context)
            => throw ExceptionUtilities.Unreachable();
 
        public ITypeDefinition? GetResolvedType(EmitContext context)
        {
            return (ITypeDefinition?)WrapType(OldDefinition.GetResolvedType(context));
        }
    }
}