operator bool() method from fcf::Exception class

bool operator bool() const

Class: fcf::Exception

Package: fcfBasis

File: bits/PartException/ExceptionDecl.hpp

Implementation file: bits/PartException/Exception.hpp ( link_to_the_implementation_in_the_file )

Available from version: 1.0.1

Checks whether the exception object contains any error information (a non-empty message).

The operator bool method provides a convenient way to check if an fcf::Exception object is "active".

An exception is considered true if a non-empty message name is associated with it.

Result

bool

- Returns true if the exception has a valid, non-empty message; false otherwise.

Example: Checking exception state

Demonstrating how to use the boolean operator to distinguish between empty and populated exception objects.

#define FCF_BASIS_IMPLEMENTATION #include <fcfBasis/basis.hpp> #include <iostream> int main() { // 1. Create an empty exception object fcf::Exception emptyEx; // Check if emptyEx is "true" (it should be false because it has no message) if (!emptyEx) { std::cout << "Exception is empty." << std::endl; } // 2. Create a populated exception object with a message fcf::Exception populatedEx("MY_ERROR", "Something went wrong", __FILE__, __LINE__); // Check if populatedEx is "true" (it should be true because it has a message) if (populatedEx) { std::cout << "Exception is populated: " << populatedEx.what() << std::endl; } return 0; }

Output:

Exception is empty. Exception is populated: Something went wrong Position: /home/user/application/main.cpp:15

The operator bool method effectively allows using exception objects in boolean contexts to quickly verify if they contain error details.