< cpp‎ | error
Error handling
Exception handling
Exception handling failures
(until C++17)
(until C++17)
(C++11)(until C++17)
(until C++17)
Exception categories
Error codes
Error codes
system_error facility
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

constructs the exception object
(public member function)


explicit invalid_argument( const std::string& what_arg );
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 std::invalid_argument 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.


what_arg - explanatory string


May throw std::bad_alloc

Inherited from std::exception

Member functions

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


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.