Can someone please explain constexpr

Can someone explain to me what `constexpr` does and why it is used?

C++11 has introduced the keyword constexpr , which when used with a function, ensures that the function is treated as a compile-time constant ...

constexpr (C++) - Microsoft Learn

The primary difference between const and constexpr variables is that the initialization of a const variable can be deferred until run time. A ...

Understanding constexpr Specifier in C++ - GeeksforGeeks

constexpr specifies that the value of an object or a function can be evaluated at compile-time and the expression can be used in other constant ...

What's the difference between constexpr and const? - Stack Overflow

When can I / should I use both, const and constexpr together? A. In ... On the other hand constexpr always define compile time constants that can ...

Can someone help explain C++'s `constexpr`? - Quora

If a variable is declared [code ]constexpr[/code], it means that the programmer agrees to accept certain restrictions to ensure that the ...

constexpr specifier (since C++11) - cppreference.com - C++ Reference

The constexpr specifier declares that it is possible to evaluate the value of the function or variable at compile time. Such variables and ...

5.9 — Constexpr and consteval functions - Learn C++

The constexpr keyword is used to signal to the compiler and other developers that a function can be used in a constant expression. Here's the ...

How does the constexpr function work in C++? - Quora

Short version: constexpr tells the compiler that the item it qualifies should be evaluated at compile time and the result treated as a compile- ...

What is the difference between constexpr and creating a variable?

Can someone clarify what the difference is between a constexpr (e.g. constexpr int WORD_LENGTH = 5) versus just creating a variable (e.g int WORD_LENGTH ...

The constexpr specifier (C++11) - IBM

A constexpr specifier used in an object declaration declares the object as const. Such an object must be of a literal type and initialized.

C++ From Scratch: Constexpr - YouTube

C++ Weekly - Ep 312 - Stop Using `constexpr` (And Use This Instead!) ... Should I pass by const reference or by value? The Cherno•109K views.

Understanding the Power of 'constexpr' in C++ | by Elysium Celeste

It allows you to define and use constants, expressions, and functions that the compiler can compute at compile time rather than at runtime.

5.6 — Constexpr variables - Learn C++

Fortunately, we can enlist the compiler's help to ensure we get a compile-time constant variable where we desire one. To do so, we use the ...

C++ constexpr makes compile-time programming a breeze

... constexpr conditions, variables and calsses are explained ... However, a constexpr function can be called at both compile-time and runtime:.

Introduction to constexpr | Modern Cpp Series Ep. 86 - YouTube

/ @mikeshah ▻Lesson Description: In this lesson I will show you how to use constexpr to 'suggest' expressions that could be evaluated at ...

Using constexpr to Improve Security, Performance and ... - SmartBear

By enforcing compile-time evaluation of its expression, constexpr lets you define true constant expressions that are crucial for time-critical ...

const vs constexpr vs consteval vs constinit in C++20 - C++ Stories

Since C++11, we have a new keyword - constexpr - which pushed further the control over variables and functions that can be used in constant ...

C++ Weekly - Ep 315 - constexpr vs static constexpr - YouTube

C++ Weekly - Ep 312 - Stop Using `constexpr` (And Use This Instead!) ... Should I pass by const reference or by value? The Cherno•108K views.

should i use static constexpr instead #d - C++ Forum - CPlusPlus

They express, describe, and narrow down; help compiler to point out unintended. 1 2 3, struct Sample { int example() ...

F() and constexpr value vs #define -- how to inline the value

The constexpr is a variable, in that case what the compiler sees is the variable name. Lose the # in the macro if you want to see the value ...