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

This is the documentation for a snapshot of the master branch, built from commit c0bc0d89c9.
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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 usually only called by the code expanded by BOOST_CONTRACT_OLDOF.

See Also:

No Macros

Returns:

Null old value.


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