Questions tagged [c++20]
Code that is written to the 2020 version of the C++ standard. Use in conjunction with the 'c++' tag.
349 questions
9votes
2answers
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Simple LRU cache implementations in C++20
LRU cache is a classical design pattern frequently questioned in programming technical interviews. It is best illustrated with pictures. Here are two examples. The following are two alternative ...
- 190
10votes
3answers
2kviews
C++ std::optional implementation for tech interview
I'm preparing for entry-level C++ developer interview and decided to implement some of std:: members. Here's my implementation of std::optional. I would be grateful ...
- 101
9votes
4answers
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C++20 Singly Linked List with Iterator
Below is the code I wrote to implement a singly linked list. To keep things simple, I omitted things like copy constructor. Aside from general feedback, here are some specifics I would like addressed: ...
- 193
10votes
4answers
1kviews
Linear version of std::bit_ceil that computes the smallest power of 2 that is no smaller than the input integer
I am not looking for feedback on the algorithm itself, but rather on the implementation; things like modern C++20 writing, style, proper ways to test and handle the validity of input (should I be ...
- 193
4votes
2answers
389views
Arena/Region Allocator in C++ (rev 2)
2nd revision of original post: Arena/Region Allocator in C++ Context, changes Trying to get a better grasp on low-level memory management, I implemented an arena allocator in C++. It's a rough ...
- 379
5votes
1answer
73views
Implementation of semantically safe interface for `std::future::then`
Disclaimer: I am not a fan of the then concept, specifically as a mutating non-static member function. As of now, it has only been introduced as part of the ...
9votes
1answer
371views
SIMD Softmax implementation
I am learning SIMD and looking for feedback. This is column-wise Softmax for matrices stored in row-major format. Note that matrices come from outside so padding or dimensions being power of 2 can't ...
- 193
7votes
1answer
774views
C++20 Robust File Interface
I'm working on a homebrew game engine in C++20. I needed a robust, minimal-overhead, and easy way to load files into memory. I ended up with this: a simple, easy file loader. It doesn't have many ...
15votes
2answers
521views
Custom implementation of `std::unique_ptr<T>`
I skimmed through the documentation on cppreference.com and put down the basic functionalities expected out of a unique_ptr<T> implementation. I coded up a ...
- 549
4votes
2answers
424views
Get histogram of bytes in any set of files in C++20
Intro This post is the continuation of Get histogram of bytes in any set of files in C++14 - take II. This time, I have incorporated almost all suggestions in the answers. Code My newest trial looks ...
- 30.2k
4votes
3answers
371views
PIMPL based logging interface to print multiple parameters at once
I have implemented my own logger based pimpl idiom. As a third party lib, I used spd log. My focus is to provide an interface to the end user who wants to print multiple parameters at once. I also ...
- 171
2votes
1answer
105views
Framework for object creation and method invocation using strings (for use with scripting)
My team is working on replacing our in-house scripting solution which will allow users to control the software and access data using their own external scripts. The plan is to use a class hierarchy ...
- 93
4votes
2answers
459views
Second Try at C++ 20 Generic Dictionary for enums and Strings
This is a follow up question to Abstract Generic Dictionary. Some of the code reviewed in this question was also reviewed in C++20 Performance Test Code Generator. The new template class attempts to ...
- 25.7k
3votes
1answer
71views
Simple Web Server
Getting close to the library I want. Here is me using the library I have been posting in chunks to build a functional Web Server. Any suggestions on code or interface changes. I want the code to look ...
- 97.2k
5votes
1answer
288views
Converting a char string to wchar_t string based on a given toWideStr() starting point
I'm working on a legacy code base and I came across a method in which I wanted to remove the chance of swallowing an exception. In the following I want to walk you through the refacoring process, ...
- 1,465
