auto, range-for, move semantics, constexpr, structured bindings, std::optional, std::variant, modules, coroutines and the spaceship operator.
40 cards · basic cards · AI-written, checked twice. Edit anything.
- What does auto do in C++11?
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Deduces the type of a variable from its initializer- Can you use auto with function return types in C++14?
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Yes, a function can return auto and the return type is deduced from return statements- What is the type of x in: auto x = 5;
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int- What happens if auto is used for a variable with no initializer?
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Compile error; auto requires an initializer to deduce the type- What C++ version introduced range-based for loops?
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C++11- What is the syntax for a range-based for loop?
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for (type element : container) { ... }- What does a range-based for loop require from a container?
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begin() and end() member functions, or external begin/end functions in the same namespace- What is an rvalue reference in C++11?
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A reference to a temporary object, declared with &&- What is the difference between copy and move semantics?
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Copy creates a new independent copy; move transfers ownership of resources to avoid duplication- What keyword forces move semantics when passing an lvalue?
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std::move- What is a move constructor?
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A constructor that takes an rvalue reference and transfers resources from the temporary- Can you call a move constructor with an lvalue?
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Only if you explicitly use std::move to cast it to an rvalue reference- What does constexpr mean in C++?
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The expression or function can be evaluated at compile time to produce a constant- Can a constexpr function also run at runtime?
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Yes, if the inputs are not compile-time constants, the compiler generates runtime code- What is consteval (C++20)?
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A function that must always be evaluated at compile time, never at runtime
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