Handling exceptions in noexcept
functions
How can I handle exceptions within a noexcept
function without terminating the program?
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.
Using 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.