Boost C++ Libraries

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Function null_old

boost::contract::null_old — Return a null old value.

Synopsis

// In header: <boost/contract/old.hpp>


old_value null_old();

Description

The related old value pointer will also be null. This function is often only used by the code expanded by BOOST_CONTRACT_OLDOF.

See Also:

No Macros

Returns:

Null old value.


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