I have Visual Studio 2022 and this line of code using (Excel.Application xlApp = new Excel.Application()) throws an error CS1674 'Application': type used in a using statement must implement 'System....

Why do gcc, clang and msvc successfully compile the following code? (godbolt) namespace impl { class A; } // namespace impl namespace api { using namespace impl; } // namespace api class B { ...

From cppreference : From the point of view of unqualified name lookup of any name after a using-directive and until the end of the scope in which it appears, every name from namespace-name is visible ...

We're on Visual Studio Code, .NET 8 & Angular. I changed the structure of my project and now I cannot use using directive in my app, it's driving me crazy. Here is my structure: Structure Expended ...

I last used C++ at the 98 with boost/C++11 simulation. I am reading Stroustrup's "A Tour of C++, Third Edition" to help introduct the things I will need to learn more about. Following ...

The C# doc on the using directive says The using directive allows you to use types defined in a namespace without specifying the fully qualified namespace of that type. I understood this to mean ...

I have a VS issue, VS2022 but it also happened in the previous version. In fact its been happening for a few years. When I do certain operations, often moving files within VS, I find I get a load of ...

I am trying to make some sort of easy way to define mcu that I use, and by defining mcu, different header files should be included. I tried doing it with #if and #elif directives : #include "...

In the following code will fail to compile because, despite the chain of public inheritance, HasFlag is not visible in DerivedFoo. class BasicFoo { public: bool HasFlag() const { return m_flag; } ...

The following code (a simplified example from a more complex code) fails to compile with gcc 11.3.0 #include <array> #include <memory> #include <tuple> namespace tools { template &...

Using the using-directive I'm able to select a certain set of methods from the base class to put into a different access scope. Is this also possible for individual overloads of the method? Something ...

Heyo, basically I was writing this simple function to ask you how many cars you have, inputing the amount in the array, and assigning the names of the cars to the array aswell. Also made a for loop to ...

I have a project with some interfaces that contains some type alias in it, for example like below: namespace UsingTest { using MyType = System.Collections.Generic.List<int>; public ...

I have a .NET Framework 4.7.2 web application. I am receiving the following yellow screen error from some of my Views and Partial Views but not all of them: Expected a "{" but found a "...

This is just short inquiry if it is at all possible to somehow import base class constructors without all the template bloat. Consider this example where I'm inheriting from a templated std::variant: ...