C++ exceptions provide a mechanism for reporting errors in a thread-safe manner, without the need to manually unwind the call stack, while also providing support for RAII and complex data types. To better understand this, refer to the following example:
#include <cstring>#include <iostream>void myfunc(int val){ if (val == 42) { throw EINVAL; }}int main(){ try { myfunc(1); std::cout << "success\n"; myfunc(42); std::cout << "success\n"; } catch(int ret) { std::cout << "failure: " << strerror(ret) << '\n'; }}// > g++ -std=c++17 scratchpad.cpp; ./a.out// success// failure: Invalid argument
In the preceding example, our myfunc() function has been greatly simplified compared to its POSIX-style equivalent. ...
