length-error-class.md

description	title	ms.date	f1_keywords	helpviewer_keywords	ms.assetid
Learn more about: length_error Class	length_error Class	09/09/2021	stdexcept/std::length_error	length_error class	d53c46c5-4626-400d-bd76-bf3e1e0f64ae

length_error Class

The class serves as the base class for all exceptions thrown to report an attempt to generate an object too long to be specified.

Syntax

class length_error : public logic_error {
public:
    explicit length_error(const string& message);

    explicit length_error(const char *message);

};

Remarks

The value returned by what() is a copy of message.data(). For more information, see what and data.

Example

// length_error.cpp
// compile with: /EHsc
#include <cstddef>
#include <exception>
#include <iostream>
#include <typeinfo>
#include <vector>
using namespace std;

int main()
{
   try
   {
      vector<int> v(100 + static_cast<size_t>(-1) / sizeof(int));
   }
   catch (const exception& e)
   {
      cerr << "Caught: " << e.what() << endl;
      cerr << "Type: " << typeid(e).name() << endl;
   }
}
/* Output:
Caught: vector too long
Type: class std::length_error
*/

Requirements

Header: <stdexcept>

Namespace: std

See also

logic_error Class
Thread Safety in the C++ Standard Library