< 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 length_error;

Defines a type of object to be thrown as exception. It reports errors that result from attempts to exceed implementation defined length limits for some object.

This exception is thrown by member functions of std::basic_string and std::vector::reserve

cpp/error/exceptioncpp/error/logic errorstd-length error-inheritance.svg

Inheritance diagram

Member functions

constructs the exception object
(public member function)


explicit length_error( const std::string& what_arg );
explicit length_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().

Because copying std::length_error 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)

See also

changes the number of characters stored
(public member function of std::basic_string<CharT,Traits,Allocator>)