std::terminate and the noexcept specifier

Handling exceptions in noexcept functions

How can I handle exceptions within a noexcept function without terminating the program?

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If a noexcept function needs to handle exceptions internally without propagating them to the caller, you can use a try-catch block within the function:

#include <iostream>
#include <stdexcept>

void doSomething() noexcept {
  try {
    // Code that may throw an exception
    throw std::runtime_error(
      "Something went wrong");
  } catch (const std::exception& e) {
    // Handle the exception internally
    std::cerr << "Caught exception: " << e.what()
              << '\n';
    
    // Perform necessary cleanup or error handling
  }
}

int main() {
  doSomething();
  std::cout << "Program continues without "
    "termination";
}
Caught exception: Something went wrong
Program continues without termination

By catching and handling the exception within the noexcept function, you prevent it from propagating to the caller and causing the program to terminate. However, it's important to ensure that the exception is properly handled and the function can still meet its postconditions and invariants.

This Question is from the Lesson:

std::terminate and the noexcept specifier

This lesson explores the std::terminate function and noexcept specifier, with particular focus on their interactions with move semantics.

Answers to questions are automatically generated and may not have been reviewed.

This Question is from the Lesson:

std::terminate and the noexcept specifier

This lesson explores the std::terminate function and noexcept specifier, with particular focus on their interactions with move semantics.

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