This is C++ · expert, lesson 1: concepts. Read the teaching and the stills before the checks. The quizzes are open book and test the subject — C++ itself — not product rules or layout trivia.
C++ Expert · Lesson 1 · On the house
concepts
Constrain a template (C++20). Lesson 1 is free — on the house.
Lessons · C++ Expert · Lesson 1 of 10 · On the house
concepts
Constrain a template (C++20).
Concepts constrain template parameters with readable requirements.
requires expressions document required operations.
Better errors than raw template soup.
C++20 feature.
concept
template <typename T>
concept Addable = requires(T a, T b) { a + b; };Sit with that still. Trace it top to bottom. Name each piece. The exercise asks you to match its essence.
If something fails when you try it yourself, change one thing. Read the error. Return to the still. I will not rush you.
Quiz
What do concepts constrain?
Quiz
What does requires(T a, T b) { a + b; } mean?
Quiz
Which standard introduced concepts?
Quiz
Based on today's teaching, which claim is right?
Quiz
Based on today's teaching, which claim is right?
Quiz
Based on today's teaching, which claim is right?
Quiz
Based on today's teaching, which claim is right?
Check
Match the still for: concepts.
That is the lesson. When every quiz and exercise on this page is green, mark it passed. Next lesson when you are ready.
Open-book: the answers are on this page. Pass every quiz and check (8) to mark the lesson done. This visit: 0/8.