operator bool() method from fcf::Error class

bool operator bool() const

File: bits/PartException/ErrorDecl.hpp ( link_to_the_declaration_in_the_file )

Implementation file: bits/PartException/Error.ipp ( link_to_the_implementation_in_the_file )

Available from version: 1.0.1

Checks if the error object currently contains an error state.

The operator bool method allows you to check whether an fcf::Error object is in an error state (active) or represents a successful operation (clean).

It evaluates to true if the error member is non-zero, indicating that an error has been recorded. If the error member is null, it returns false, signifying a clean state.

Result

bool

- Returns true if an error is present, false otherwise.

Example: Checking error state

Demonstrating how to use the operator bool in conditional statements to react to errors.

#define FCF_BASIS_IMPLEMENTATION #include <fcfBasis/basis.hpp> #include <iostream> int main() { // 1. Create a clean error object fcf::Error err; // The error object is initially clean (operator bool returns false) if (!err) { std::cout << "Initial state: Error is clean." << std::endl; } // 2. Trigger an error state fcf::Exception ex; err = fcf::Error(&ex); err.raise<fcf::LogicException>(__FILE__, __LINE__, "Something went wrong"); // 3. Check the error state using operator bool if (err) { std::cout << "Error state detected: " << err.error << std::endl; } else { std::cout << "Error state: OK." << std::endl; } // 4. Clear the error and check again err.clear(); if (!err) { std::cout << "State after clear(): Error is clean again." << std::endl; } return 0; }

Output:

Initial state: Error is clean. Error state detected: FCF_LOGIC State after clear(): Error is clean again.

The operator bool is a convenient way to perform error checking in a single line, similar to how built-in pointers or boolean flags are used in C++.