C++ constexpr // a tool for optimizing your code

preview_player
Показать описание
We continue our series on C++11 features you might have forgotten or never learned. This time, we learn about the constexpr keyword which can be used to tell the compiler to evaluate certain expressions at COMPILETIME. This will speed up the execution of your program, but at a cost.

// Learn More //
C++ 11 playlist:

Check out my complete C++ videos playlist:

// Consider supporting this channel in multiple ways //
Bitcoin: 177wfkQwzXiC8o2whQMVpSyuWUs95krKYB
Dogecoin: DRK2HDp3ZkkbFpvGZnVgMVosnBhPv8r3uP
  1. Professor Hank Stalica
  2. C Tutorial
  3. Professor Hank Stalica
  4. Learn to Program
  5. cpp
  6. C
Рекомендации по теме
const and constexpr 0:52:13

const and constexpr - Rainer Grimm - Meeting C++ online

CppCon 2017: Ben 1:10:13

CppCon 2017: Ben Deane & Jason Turner “constexpr ALL the Things!”

C++ Weekly - 0:04:18

C++ Weekly - Ep 145 - Semi-Automatic `constexpr` and `noexcept`

Pointers and constexpr 0:10:54

Pointers and constexpr in C++

C++ Weekly Special 0:04:28

C++ Weekly Special Edition - Using C++17's constexpr if

A totally constexpr 0:59:50

A totally constexpr standard library - Paul Keir, Joel Falcou et al - Meeting C++ 2022

C++ Weekly - 0:04:40

C++ Weekly - Ep 458 - array of bool? No! constexpr std::bitset!

Practical constexpr - 1:02:11

Practical constexpr - Jason Turner - Meeting C++ 2017

C++ Weekly - 0:08:36

C++ Weekly - Ep 301 - C++ Homework: `constexpr` All The Things

Lightning Talk: The 0:06:43

Lightning Talk: The UB Detector: constexpr - Andreas Fertig - CppCon 2024

if constexpr C++17 0:05:23

if constexpr C++17

“Constexpr Everything” - 0:59:55

“Constexpr Everything” - The Standard Library, Microkernel, Apps, and Unit Tests - Rian Quinn

C++ Weekly - 0:08:00

C++ Weekly - Ep 314 - Every Possible Way To Force The Compiler To Do Work At Compile-Time in C++

C++ Weekly - 0:06:21

C++ Weekly - Ep 432 - Why constexpr Matters

Don't constexpr All 1:00:47

Don't constexpr All the Things - David Sankel [CppNow 2021]

C Which of 0:00:18

C Which of the following statements is correct about a constexpr

C++ | Tips 0:01:00

C++ | Tips Understanding Constant Types in C++: const, constexpr, constinit #shorts #cpp

CppCon 2015: B. 0:11:41

CppCon 2015: B. Geller & A. Sermersheim 'Compile-Time Counter Using Template & Constexp...

2019 LLVM Developers’ 0:29:01

2019 LLVM Developers’ Meeting: N. Licker “The clang constexpr interpreter”

C++Now 2017: Tony 0:06:45

C++Now 2017: Tony Van Eerd “Bruce Lee”

C++ Tips for 0:00:09

C++ Tips for all

CppCon 2018: Fabian 0:25:23

CppCon 2018: Fabian Renn-Giles “A Semi Compile/Run-time Map with (Nearly) Zero Overhead Lookup”

C++ templates (if 0:19:33

C++ templates (if constexpr, type_traits) and preferring free functions | Modern Cpp Series Ep. 214

CppCon 2015: Peter 1:18:27

CppCon 2015: Peter Sommerlad “Variable Templates and Compile-Time Computation with C++14'

Комментарии
Автор

Good video.
In a past I assumed that good compielrs optimise stuff like that on their own.

peterSobieraj
Автор

I'm using CLion c++17 and 4:26 this compile to me.... No need to use constexpr.... Thanks anyway

josepescina
Автор

hi professor, I took your class last semester and I would like to get a head start into CS201. What videos do you recommend I should watch and in what order? Thank you.

SagaLabsAI
Автор

Hi Professor,
I tried following the code but it got compiled without any issues.
int z = 5 + 2;
int a[z];
it has not raised any error with compile time or runtime. I am not sure how it occurred in your case. are these suppressed in later c++ compiler versions line14, 17, 20.

can you please guide

GSmileK
join shbcf.ru