BIND 10 #2320: Allocation engine v4: Address assignment

[BIND 10 Development]

#2320: Allocation engine v4: Address assignment
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            Reporter:  tomek         |                        Owner:
                Type:  task          |  stephen
            Priority:  medium        |                       Status:
           Component:  dhcp4         |  reviewing
            Keywords:                |                    Milestone:
           Sensitive:  0             |  Sprint-DHCP-20130122
         Sub-Project:  DHCP          |                   Resolution:
Estimated Difficulty:  0             |                 CVSS Scoring:
         Total Hours:  0             |              Defect Severity:  N/A
                                     |  Feature Depending on Ticket:
                                     |          Add Hours to Ticket:  0
                                     |                    Internal?:  0
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Changes (by tomek):

 * owner:  tomek => stephen


Comment:

 This trick with default parameters in derived classes won't work. See
 attached subnet.cc. Try to guess what will the code print out before you
 run it. I was quite surprised.

 The explanation is that the default parameter is something that is used
 during compilation. Type of used default value depends on the type of
 pointer used, not the type of object pointed to (that can be only resolved
 at runtime). So here you have an example of a base pointer to an object of
 derived class with a default value from base class calling method from a
 derived class.

 Let's keep the code as it is now.

 Ok, the ticket is back with you.

-- 
Ticket URL: <http://bind10.isc.org/ticket/2320#comment:9>
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