IMethod ResolveMethodDefinition(MethodDefinitionHandle methodDefHandle, bool expandVarArgs)
{
var method = GetDefinition(methodDefHandle);
if (expandVarArgs && method.Parameters.LastOrDefault()?.Type.Kind == TypeKind.ArgList)
{
method = new VarArgInstanceMethod(method, EmptyList <IType> .Instance);
}
return(method);
}
public IMethod Resolve(MethodReference methodReference)
{
if (methodReference == null)
{
throw new ArgumentNullException(nameof(methodReference));
}
lock (methodLookupCache) {
IMethod method;
if (!methodLookupCache.TryGetValue(methodReference, out method))
{
method = FindNonGenericMethod(methodReference.GetElementMethod());
if (method == null)
{
method = CreateFakeMethod(methodReference);
}
if (methodReference.CallingConvention == MethodCallingConvention.VarArg)
{
method = new VarArgInstanceMethod(
method,
methodReference.Parameters.SkipWhile(p => !p.ParameterType.IsSentinel).Select(p => Resolve(p.ParameterType))
);
}
else if (methodReference.IsGenericInstance || methodReference.DeclaringType.IsGenericInstance)
{
IList <IType> classTypeArguments = null;
IList <IType> methodTypeArguments = null;
if (methodReference.IsGenericInstance)
{
var gim = ((GenericInstanceMethod)methodReference);
methodTypeArguments = gim.GenericArguments.SelectArray(Resolve);
}
if (methodReference.DeclaringType.IsGenericInstance)
{
var git = (GenericInstanceType)methodReference.DeclaringType;
classTypeArguments = git.GenericArguments.SelectArray(Resolve);
}
method = method.Specialize(new TypeParameterSubstitution(classTypeArguments, methodTypeArguments));
}
methodLookupCache.Add(methodReference, method);
}
return(method);
}
}
/// <summary>
/// Resolves a method reference.
/// </summary>
/// <remarks>
/// Class type arguments are provided by the declaring type stored in the memberRef.
/// Method type arguments are provided by the caller.
/// </remarks>
IMethod ResolveMethodReference(MemberReferenceHandle memberRefHandle, GenericContext context, IReadOnlyList <IType> methodTypeArguments = null, bool expandVarArgs = true)
{
var memberRef = metadata.GetMemberReference(memberRefHandle);
Debug.Assert(memberRef.GetKind() == MemberReferenceKind.Method);
MethodSignature <IType> signature;
IReadOnlyList <IType> classTypeArguments = null;
IMethod method;
if (memberRef.Parent.Kind == HandleKind.MethodDefinition)
{
method = ResolveMethodDefinition((MethodDefinitionHandle)memberRef.Parent, expandVarArgs: false);
signature = memberRef.DecodeMethodSignature(TypeProvider, context);
}
else
{
var declaringType = ResolveDeclaringType(memberRef.Parent, context);
var declaringTypeDefinition = declaringType.GetDefinition();
if (declaringType.TypeArguments.Count > 0)
{
classTypeArguments = declaringType.TypeArguments;
}
// Note: declaringType might be parameterized, but the signature is for the original method definition.
// We'll have to search the member directly on declaringTypeDefinition.
string name = metadata.GetString(memberRef.Name);
signature = memberRef.DecodeMethodSignature(TypeProvider,
new GenericContext(declaringTypeDefinition?.TypeParameters));
if (declaringTypeDefinition != null)
{
// Find the set of overloads to search:
IEnumerable <IMethod> methods;
if (name == ".ctor")
{
methods = declaringTypeDefinition.GetConstructors();
}
else if (name == ".cctor")
{
methods = declaringTypeDefinition.Methods.Where(m => m.IsConstructor && m.IsStatic);
}
else
{
methods = declaringTypeDefinition.GetMethods(m => m.Name == name, GetMemberOptions.IgnoreInheritedMembers)
.Concat(declaringTypeDefinition.GetAccessors(m => m.Name == name, GetMemberOptions.IgnoreInheritedMembers));
}
// Determine the expected parameters from the signature:
ImmutableArray <IType> parameterTypes;
if (signature.Header.CallingConvention == SignatureCallingConvention.VarArgs)
{
parameterTypes = signature.ParameterTypes
.Take(signature.RequiredParameterCount)
.Concat(new[] { SpecialType.ArgList })
.ToImmutableArray();
}
else
{
parameterTypes = signature.ParameterTypes;
}
// Search for the matching method:
method = null;
foreach (var m in methods)
{
if (m.TypeParameters.Count != signature.GenericParameterCount)
{
continue;
}
if (CompareSignatures(m.Parameters, parameterTypes) && CompareTypes(m.ReturnType, signature.ReturnType))
{
method = m;
break;
}
}
}
else
{
method = null;
}
if (method == null)
{
method = CreateFakeMethod(declaringType, name, signature);
}
}
if (classTypeArguments != null || methodTypeArguments != null)
{
method = method.Specialize(new TypeParameterSubstitution(classTypeArguments, methodTypeArguments));
}
if (expandVarArgs && signature.Header.CallingConvention == SignatureCallingConvention.VarArgs)
{
method = new VarArgInstanceMethod(method, signature.ParameterTypes.Skip(signature.RequiredParameterCount));
}
return(method);
}
public bool Equals(IMember obj, TypeVisitor typeNormalization)
{
VarArgInstanceMethod other = obj as VarArgInstanceMethod;
return(other != null && baseMethod.Equals(other.baseMethod, typeNormalization));
}
public override bool Equals(object obj)
{
VarArgInstanceMethod other = obj as VarArgInstanceMethod;
return(other != null && baseMethod.Equals(other.baseMethod));
}