In this post, we will see how to resolve C++ and pybind11: type_caster support for std::span? Question: I wish to pass a Python numpy array to this C++ function: Is it possible to write a custom type caster for pybind11 ...

In this post, we will see how to resolve QT 5 drawing translate(), rotate(), font fill issues Question: I’m writing my first QT5 app… this uses a third party map library (QGeoView). I need to draw an object (something like ...

In this post, we will see how to resolve “undeclared identifier” with MSVC++ 17.34 (VS 22) within decltype-based SFINAE expression Question: We are trying to update a C++17 project from VS 19 to VS 22, and all of a sudden, ...

In this post, we will see how to resolve Getting Segmentation violation signal error on copying vector elements? Question: I have the following code for doing a http post request. I am getting the response in const std::vector<json> value …The ...

In this post, we will see how to resolve QToolButton does not switch QTextCharFormat::setFontStrikeOut() for future written text while having no text selected Question: I have a text editor program, and I wanted to provide a check-able QToolButton to switch ...

In this post, we will see how to resolve How to check a valid boost asio CompletionToken? Question: I’m writing Boost.Asio style async function that takes CompletionToken argument. The argument can be function, function object, lambda expression, future, awaitable, etc. ...

In this post, we will see how to resolve Why type deduction fails for a class member? Question: Let’s assume that we have this small code: This code easily compiles with [T=int] for Test class. Now if I write a ...

In this post, we will see how to resolve How to correctly pass a function with parameters to another function? Question: I have the following code to demonstrate a function been called inside another function. The below code works correctly: ...

In this post, we will see how to resolve C++ 17 copy elision of heap allocated objects? Question: I’m using C++ 17 and I have a rather large (two dimensional) array of numbers I’m trying to initialize at the namespace ...

In this post, we will see how to resolve Is there any way to create a lookup table at compile time or in preprocessor for a factory creational pattern in c++? Question: I have developed code for image processing that ...