std::invalid_argument

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std::invalid_argument
Defined in header <stdexcept>
class invalid_argument;

Defines a type of object to be thrown as exception. It reports errors that arise because an argument value has not been accepted.

This exception is thrown by std::bitset::bitset, and the std::stoi and std::stof families of functions.

cpp/error/exceptioncpp/error/logic errorstd-invalid argument-inheritance.svg

Inheritance diagram

Member functions

(constructor)
constructs the exception object
(public member function)

std::invalid_argument::invalid_argument

explicit invalid_argument( const std::string& what_arg );
(1)
explicit invalid_argument( const char* what_arg );
(2) (since C++11)

Constructs the exception object with what_arg as explanatory string that can be accessed through what().

Because copying a standard library class derived from std::exception is not permitted to throw exceptions, this message is typically stored internally as a separately-allocated reference-counted string. This is also why there is no constructor taking std::string&&: it would have to copy the content anyway.

Parameters

what_arg - explanatory string

Exceptions

May throw std::bad_alloc

Inherited from std::exception

Member functions

[virtual]
destroys the exception object
(virtual public member function of std::exception)
[virtual]
returns an explanatory string
(virtual public member function of std::exception)

Notes

The purpose of this exception type is similar to the error condition std::errc::invalid_argument (thrown in std::system_error from member functions of std::thread) and the related errno constant EINVAL.