std::bad_alloc - cppreference.com
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      std::bad_alloc

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      std::bad_alloc
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      bad_alloc::bad_alloc
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      <tbody> </tbody>
      Definido no cabeçalho <new>
      class bad_alloc;

      std::bad_alloc is the type of the object thrown as exceptions by the

      funções de alocação
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      to report failure to allocate storage.

      cpp/error/exception

      Inheritance diagram

      Funções de membro

      		 constructs the bad_alloc object
      (função pública membro)
      		replaces a bad_alloc object
      (função pública membro)
      Retorna a string explicativo
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      (of std::exception função pública virtual membro) [edit]
      [virtual]
      retorna uma cadeia explicativa
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      (of std::exception função pública virtual membro) [edit]

      Exemplo

      #include <iostream>
#include <new>

int main()
{
    try {
        while (true) {
            new int[100000000ul];
        }
    } catch (const std::bad_alloc& e) {
        std::cout << "Allocation failed: " << e.what() << '\n';
    }
}

      Saída: 

      Allocation failed: std::bad_alloc

      Veja também