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How to explicitly instantiate a template function efficiently?
03/25/2025 by user30060245
I have a template function: template void my_func(...) I need to instantiate it for many combinations of IndexType/DataType/EntityType. Is there an efficient way to do this? Currently I am instantiating the function for every combination of IndexType/DataType/EntityType explicitly and it takes a long list of instantiations.
Parameter Mismatch Between CryptoContext and Public Key When Using Separate Serialization
03/25/2025 by Ankush_anonymous
[languages & Tech Stack: C++, Python, OpenFHE] I'm encountering an issue when trying to use separate functions (or executables) for key generation and vote encryption. In my workflow, I generate the CryptoContext and key pair (public and secret keys) in one process and serialize them to separate files. Later, in […]
no known conversion, lambda function [duplicate]
03/25/2025 by AccidentalFourierTransform
c++ with the standard vector library. I want F to be a vector of functions. The following works just fine: vector F; F.push_back([] (vector x) -> double {return x.at(0);}); F.push_back([] (vector x) -> double {return x.at(1);}); F.push_back([] (vector x) -> double {return x.at(2);}); /* etc */ but if I try […]
How to memset if trivial type?
03/25/2025 by Michael
The compiler complained about memset "clearing an object of non-trivial type", so I enclosed the call to memset like this: if ( is_trivial< T >::value ) { memset( ... ); } else { for ( ... ) { ... } } Unfortunately, the compiler keeps issuing the class-memaccess warning about […]
Updating QFileSystemModel when inserting a flash card
03/25/2025 by Joe J
I am using QFileSystemModel together with QTreeView. I want QTreeView to update its state and show the flash card in the tree when I insert a flash drive into the computer. This only works if you specify model->setRootPath(QDir::rootPath()) where QDir::rootPath() is C:\. If, for example, you use an empty string […]
C++ x86-64 :Atomic vs mutex under hood. How do they work
03/25/2025 by getsoubl
I am wondering how atomic works under hood in comparison with mutexes When use atomic ,and there no split lock the bus is not locked. Is this right? What happen with mutex? For atomic operation each core has its own cache where atomic variable is stored.What happens when a variable […]
How to deploy MSVC applications that use boost stacktrace
03/25/2025 by T. Cash
I'm writing a c++ application using cmake / conan / boost on MSVC I have successfully built an application that print stacktraces using: auto frames = boost::stacktrace::stacktrace().as_vector(); Output: Stack Trace: [HC_API][THREAD: 12320] [2025-03-25 11:33:47.427] [Stack Trace] [error] Function: boost::stacktrace::basic_stacktrace::init, Address: 0x7ff8e9586674, File: stacktrace.hpp, Line: 110 [HC_API][THREAD: 12320] [2025-03-25 11:33:47.429] [Stack […]
Can assign a raw pointer to a `shared_ptr` in a test project only [closed]
03/25/2025 by Pietro
I have a raw pointer pointing to a memory address. I want to assign this address to a std::shared_ptr. I did a test project which does it successfully. However, in my main project I cannot replicate the same. This is my test project: #include #include struct A { int a […]
gstreamer audio channel mapping
03/25/2025 by Frank
I want to implement pipelines of type A which are my multi-channel audio sources and a pipeline B which is my multi-channel audio sink (wasapi or asio). Pipeline B shall act as sink for multiple pipelines since there shall be only a single wasapisink in my application. In the future […]
How to use the template array type of a template class in a template function?
03/25/2025 by Spencer Smith
I'm trying to use the array type that I declared within a class that specifies the size. In practice, the class will have several declarations based off the array size, and is only there to help logically group everything together. It could be a namespace if we were allowed to […]

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