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authorBoris Kolpackov <boris@codesynthesis.com>2011-08-04 13:29:43 +0200
committerBoris Kolpackov <boris@codesynthesis.com>2011-08-04 13:29:43 +0200
commit18ef14486e46064f4317ab407c5fe0afa3209d4b (patch)
treef70e9fb4a7d492197dca3f1fcbf05ffdf308af1a /common/callback
parent84b6d8488a2415c1c6c91b2234993497ab8f792b (diff)
Add support for value wrappers
Wrapper is a class that wraps another type. Examples of wrappers are various smart pointers, holders, etc. A wrapper can be transparent or it can handle the NULL semantics. The new odb::nullable class template is a NULL wrapper that helps to add the NULL semantics to a value type. New test: common/wrapper.
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