std::underflow_error
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                    |   Defined in header  
<stdexcept>
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|   class underflow_error; 
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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).
Contents | 
[edit] Member functions
|     (constructor)  | 
  constructs the exception object  (public member function)  | 
std::underflow_error::underflow_error
|   explicit underflow_error( const std::string& what_arg ); 
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(1) | |
|   explicit underflow_error( const char* what_arg ); 
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(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
|    [virtual] 
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  destructs the exception object  (virtual public member function of std::exception) 
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|    [virtual] 
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   returns an explanatory string  (virtual public member function of std::exception) 
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