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Numerics library

B.16 Numerics library

The Arm implementation of the C++ standard library class std::random_device is different from the open-source libc++ implementation.

The Arm® C++ standard library implementation has the following features:

  • For the constructor std::random_device, implementation limitations prevent generating nondeterministic random numbers. The implementation uses a pseudo-random number engine.
  • The default constructor of std::random_device uses the token "pseudorandom".
  • The only valid value of the parameter token of the std::random_device constructor explicit random_device(const string& token) is "pseudorandom".
  • If there is a failure, the type of exceptions that std::random_device constructors throw is std::system_error.
  • The member function result_type operator()() of std::random_device never fails.
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