Boo.Lang.Compiler.Steps.InjectCallableConversions.Convert C# (CSharp) Метод

        Expression Convert(IType expectedType, Expression argument)
        {
            if (IsStandaloneMethodReference(argument))
            {
                if (IsCallableType(expectedType))
                {
                    ICallableType argumentType = (ICallableType)GetExpressionType(argument);
                    if (argumentType.GetSignature() !=
                        ((ICallableType)expectedType).GetSignature())
                    {
                        return Adapt((ICallableType)expectedType,
                            CreateDelegate(GetConcreteExpressionType(argument), argument));
                    }
                    return CreateDelegate(expectedType, argument);
                }
                else
                {
                    return CreateDelegate(GetConcreteExpressionType(argument), argument);
                }
            }
            else
            {
                if (IsCallableType(expectedType))
                {
                    IType argumentType = GetExpressionType(argument);
                    if (Null.Default != argumentType &&
                        expectedType != argumentType)
                    {
                        return Adapt((ICallableType)expectedType, argument);
                    }
                }
            }
            return null;
        }