// Unity C# reference source

// Copyright (c) Unity Technologies. For terms of use, see

// https://unity3d.com/legal/licenses/Unity_Reference_Only_License

using System;

using System.Collections.Generic;

using System.Linq;

using Mono.Cecil;

using Unity.CecilTools.Extensions;

namespace Unity.CecilTools

{

public static class CecilUtils

{

public static MethodDefinition FindInTypeExplicitImplementationFor(MethodDefinition interfaceMethod, TypeDefinition typeDefinition)

{

return typeDefinition.Methods.SingleOrDefault(m => m.Overrides.Any(o => o.CheckedResolve().SameAs(interfaceMethod)));

}

public static IEnumerable<TypeDefinition> AllInterfacesImplementedBy(TypeDefinition typeDefinition)

{

return TypeAndBaseTypesOf(typeDefinition).SelectMany(t => t.Interfaces).Select(i => i.InterfaceType.CheckedResolve()).Distinct();

}

public static IEnumerable<TypeDefinition> TypeAndBaseTypesOf(TypeReference typeReference)

{

while (typeReference != null)

{

var typeDefinition = typeReference.CheckedResolve();

yield return typeDefinition;

typeReference = typeDefinition.BaseType;

}

}

public static IEnumerable<TypeDefinition> BaseTypesOf(TypeReference typeReference)

{

return TypeAndBaseTypesOf(typeReference).Skip(1);

}

public static bool IsGenericList(TypeReference type)

{

return type.Name == "List`1" && type.SafeNamespace() == "System.Collections.Generic";

}

public static bool IsGenericDictionary(TypeReference type)

{

if (type is GenericInstanceType)

type = ((GenericInstanceType)type).ElementType;

return type.Name == "Dictionary`2" && type.SafeNamespace() == "System.Collections.Generic";

}

public static TypeReference ElementTypeOfCollection(TypeReference type)

{

var at = type as ArrayType;

if (at != null)

return at.ElementType;

if (IsGenericList(type))

return ((GenericInstanceType)type).GenericArguments.Single();

throw new ArgumentException();

}

}

}