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Function copy_old

boost::contract::copy_old — Query if old values need to be copied (for virtual public functions and public function overrides).


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

bool copy_old(virtual_ * v);


For example, this function always returns false when both postconditions and exception guarantees are not being checked (see BOOST_CONTRACT_NO_OLDS). In addition, this function returns false when overridden functions are being called subsequent times by this library to support subcontracting. This function is usually only called by the code expanded by BOOST_CONTRACT_OLDOF.

See Also:

No Macros



The trailing parameter of type boost::contract::virtual_* and default value 0 from the enclosing virtual or overriding public function declaring the contract.


True if old values need to be copied, false otherwise.