1. The Art of Macro Programming in the Linux Kernel The Linux kernel is a prime example of macro programming, demonstrating how to achieve elegant and efficient code using macros. 1.1 Type-Safe <span>min</span> / <span>max</span> Macros The standard <span>MIN/MAX</span> macros have side effects and type issues: // Dangerous traditional macros #define MIN(a, b) ((a) < … Read more
Introduction In the world of GPU programming, we often face difficult trade-offs between performance and code quality. Traditional GPU programming adopts the SIMT (Single Instruction Multiple Threads) model, which means that if threads execute different instruction branches, performance loss occurs. To pursue extreme performance, we often have to sacrifice type safety and maintainability of the … Read more
Recently, I stumbled upon the use of std::print in C++ code, which intrigued me. I wondered how C++ had adopted the printf mechanism from C, especially since there is cout. After looking at a few examples, I realized the brilliance of this new method, which provides a more concise and convenient formatting output than cout … Read more
Basic Concepts C++ provides various integer types, with the main difference being the size of memory (width) used, allowing for different ranges of integer values. The C++ standard specifies the minimum width of these types, but the actual implementation may vary depending on the compiler and platform. Type Specifications Type Minimum Width Typical Width Minimum … Read more
New Features of cout In C++, cout is a powerful output tool that can intelligently handle different types of data and automatically perform appropriate conversions. This intelligent behavior stems from C++’s object-oriented features and operator overloading. Basic Usage of cout Printing Strings #include <iostream> using namespace std; int main() { cout << "Hello, World!"; // … Read more
Let’s talk about the jsoncons C++ library, a treasure trove for developers, and write an easy-to-understand article with code examples. A New Choice for JSON Processing: Making JSON Operations in C++ as Easy as Breathing with jsoncons In modern C++ development, JSON (JavaScript Object Notation) is ubiquitous. Whether for configuration files, network API communication, or … Read more
In C++, <span>nullptr</span> is a keyword introduced in C++11 to represent a null pointer, which is a type-safe and semantically clear null pointer constant specifically used to replace the traditional <span>NULL</span> macro or the integer <span>0</span> to indicate that a pointer does not point to any object. 🎯 1. What is <span>nullptr</span>? ✅ Definition: <span>nullptr</span> … Read more
Introduction to C++ Functors A functor is a special type of object that can be called like a regular function. However, it is more than just a function; it is an instance of a class or struct that implements function call behavior by overloading the operator(). We are all familiar with regular functions, such as … Read more
When writing C++, do you often find yourself struggling with whether to use <span>=</span> or <span>()</span> to initialize variables? Sometimes you write it as <span>int a = 10;</span> Other times you write it as <span>std::string s("hi");</span> Can class member variables only be initialized through constructors? 🤯 To address the above issues, C++11 introduced a powerful … Read more
(Search Attributes: C++ Variadic Templates Tutorial, Template Metaprogramming in Practice, Application of Fold Expressions) Three Stages of Technical Evolution 1. C-style Approach: Flexible but Risky #include <cstdarg> double cstyle_sum(int count, …) { va_list args; va_start(args, count); // Manual maintenance of parameter count double total = 0; for(int i=0; i<count; i++) { double num = va_arg(args, … Read more