Complete Modern C++ - Exception Handling - Part VI - (noexcept Keyword in C++11)

The video tutorial explains the noexcept specifier in C++, which is used to inform the compiler that a function does not throw exceptions, allowing for optimized code generation. It discusses when to use noexcept, emphasizing that it should only be applied to functions that are guaranteed not to throw exceptions. The tutorial provides examples, explains the noexcept operator, and offers guidelines for using noexcept in functions, move operations, and destructors. It highlights the importance of marking move constructors and destructors with noexcept to improve performance when using standard containers.

What is the primary purpose of the noexcept specifier in C++?

• To make functions run faster

• To allow functions to throw exceptions

• To optimize code by informing the compiler that a function does not throw exceptions

• To prevent functions from being called

What happens if a function marked with noexcept true throws an exception?

• The program immediately terminates

• The program continues running

• The exception is ignored

• The exception is caught automatically

How can you specify that a function may throw exceptions using noexcept?

• By using noexcept with a true parameter

• By using noexcept with no parameters

• By using noexcept with a false parameter

• By not using noexcept at all

What does the noexcept operator return?

• The name of the function

• The return value of a function

• The exception thrown by a function

• A boolean indicating if a function is noexcept true or false

Why should move constructors be marked with noexcept true?

• To allow them to throw exceptions

• To prevent exceptions from being thrown

• To ensure they are used by standard containers for performance optimization

• To make them run faster

What is the default exception specification for destructors in C++11?

• Depends on the compiler

• No specification

• noexcept false

• noexcept true

When should a function be marked as exception neutral?

• When it always throws exceptions

• When it may or may not throw exceptions

• When it is guaranteed not to throw exceptions

• When it is a destructor