Category: Values

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09/22/2024

In A Time Of Great Danger

I was going to talk about mortals, and how they have this mechanism in them that, they might try to annoy someone without that someone entangling themselves first, in other words they’ll pick at someone of complete innocence, BUT! there are more pressing things to speak of than something like that, but I will say that these facilities that they...

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Catch std::bad_expected_access
02/23/2025 by Graznarak
std::bad_expected_access is a template class that is thrown. I have code that only cares that any instantiation of it is thrown, not which instantiation. Is there a way to catch (or some other mechanism) all instantiations of a template that are thrown?
Segmentation Fault When Calling Class Member
02/23/2025 by PaperBee
I am receiving a segmentation fault when calling the solve() method from the class mySolver, but I only receive this error when it is called from another class for which it is a member. I believe that solve() has been implemented correctly as I have called it before (not stored […]
Using OpenGL to render a texture in a custom QQuickItem, the texture appears incomplete in the QML window
02/23/2025 by shanw
I want the picture to be fully displayed in the window. I render my own image by inheriting QQuickItem and using OPenGL. As in the QT case https://doc.qt.io/qt-6.5/qtquick-scenegraph-openglunderqml-example.html. I suspect this may have something to do with the vertex coordinates, which cause the texture to be obscured by other elements […]
Perspective Projection Not Working Properly OpenGL C++
02/23/2025 by arudhraChandrasekaran
I am trying to render a 3D cude on the window and observe the perspective projection. In the vertex shader when I dont multiply the projection matrix, the cube gets rendered (but you cant observe the perspective projection). When I multiply the perspective projection matrix the cube seems to be […]
Trouble with understanding std::views::filter -> Lazy Evaluation
02/22/2025 by rmoss3475
auto ResultView { std::views::iota(1,30) | std::views::take(20) | std::views::filter([](int x){ return x%2!=0; }) }; std::cout
How can I reload configure of fluent-bit program with C API in runtime?
02/22/2025 by Hosetsu
My problem is that I do not know how to properly change the fluent-bit configuration in my c++ application during program execution. I use two plugins: tail and lib. There is a need to change the readable files for the tail plugin at any time. The configuration yaml file looks […]
Why is this C++ code much slower than Rust?
02/22/2025 by RainingChain
I created two identical programs (one in Rust and one in C++). They are single threaded, and there are no heap allocations. The rust version (cargo run --release) runs in 12 sec. The C++ version (compiled with MSVC /O2 Release or gcc) runs in 17 sec. Profile guided optimization didn't […]
Is using ODBC {CALL} to a SQL Server stored-procedure safe from SQL injection?
02/22/2025 by xwellg
I am responsible for securing an old Windows C++ project. It uses the MFC ODBC CDatabase class to interface with SQL-Server. All DB query and insert operations are done using parameterized stored-procedures, so it seems like good practice. But almost all the DB C++ code prepares statements in this form: […]
How to call a function from hpp and cpp files in main.cpp? [closed]
02/22/2025 by Hawkeye
I'm a newbie in C++. I'm trying to write a function with string arguments in another .cpp file, and then call this function in main.cpp via an .hpp file. If I run with int, it works, but with string it does not, and I get a lot of errors. If […]
when the C++ compiler shall check for template correctness?
02/22/2025 by Adhémar Patamob
The following template code is buggy as std::array has no operator() : template void k(T x) { std::array a { x, x, x }; std::cout

Category: Values

In A Time Of Great Danger

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