| Defined in header <stdexcept> | ||
|---|---|---|
class underflow_error; |
Defines a type of object to be thrown as exception. It may be used to report arithmetic underflow errors (that is, situations where the result of a computation is a subnormal floating-point value).
The standard library components do not throw this exception (mathematical functions report underflow errors as specified in math_errhandling). Third-party libraries, however, use this. For example, boost.math throws std::underflow_error if boost::math::policies::throw_on_error is enabled (the default setting).
Inheritance diagram.
Member functions
| (constructor) | constructs the exception object (public member function) |
std::underflow_error::underflow_error
explicit underflow_error( const std::string& what_arg ); | (1) | |
explicit underflow_error( const char* what_arg ); | (2) | (since C++11) |
Constructs the exception object with what_arg as explanatory string that can be accessed through what().
Parameters
| what_arg | - | explanatory string |
Exceptions
(none).
Inherited from std::exception
Member functions
| (destructor)
[virtual] | destructs the exception object (virtual public member function of std::exception) |
| [virtual] | returns an explanatory string (virtual public member function of std::exception) |
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