Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

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Class specify_except

boost::contract::specify_except — Allow to specify exception guarantees.

Synopsis

// In header: <boost/contract/core/specify.hpp>


class specify_except {
public:
  // construct/copy/destruct
  ~specify_except();

  // public member functions
  template<typename F> specify_nothing except(F const &);
};

Description

Allow to specify the functor this library will call to check exception guarantees. This object is internally constructed by the library when users specify contracts calling boost::contract::function and similar functions (that is why this class does not have a public constructor).

See Also:

Exception Guarantees

specify_except public construct/copy/destruct

  1. ~specify_except();
    Destruct this object.

    Throws: This is declared noexcept(false) since C++11 to allow users to program failure handlers that throw exceptions on contract assertion failures (not the default, see Throw on Failure).

specify_except public member functions

  1. template<typename F> specify_nothing except(F const & f);
    Allow to specify exception guarantees.

    Parameters:

    f

    Nullary functor called by this library to check exception guarantees f(). Assertions within this functor are usually programmed using BOOST_CONTRACT_ASSERT, but any exception thrown by a call to this functor indicates a contract assertion failure (and will result in this library calling boost::contract::except_failure). This functor should capture variables by (constant) references (to access the values they will have at function exit).

    Returns:

    After exception guarantees have been specified, the object returned by this function does not allow to specify any additional contract.


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