stdrangeerror

The term "std::range_error" refers to an exception class in the C++ Standard Library, defined in the <stdexcept> header. It is derived from the std::logic_error class, which in turn is derived from the std::exception class. The std::range_error exception is typically thrown to indicate that a function argument is outside the valid range of values allowed by the function.

The primary use of std::range_error is in functions that require arguments to fall within a specific range. For example, the std::bitset class uses std::range_error to signal that a requested bit position is out of the valid range for the bitset. Similarly, the std::valarray class may throw std::range_error if an index is out of bounds.

When std::range_error is thrown, it carries a descriptive error message that can be accessed using the what() member function, inherited from std::exception. This message provides information about the nature of the error, such as the invalid argument value and the valid range.

Handling std::range_error involves catching the exception in a try-catch block and taking appropriate action based on the context of the application. This may include logging the error, displaying a user-friendly message, or taking corrective measures to ensure the program can continue to operate safely.

In summary, std::range_error is a specific exception class in C++ used to signal that a function argument is outside the valid range of values. It is part of the standard exception hierarchy and provides a mechanism for reporting and handling range-related errors in a structured manner.