AMDG
What does that mean?
To answer your question : you can use shared_ptr, but the recommended way is to use non_const_context.
And in addition, non_const_context is a slightly higher level of abstraction.
Yes :)
The disadvantage I see is that copying such a manipulator may cause surprises and using shared_ptr directly makes it more obvious that copying doesn't quite have normal semantics.
http://torjo.com/log2/doc/html/namespaceboost_1_1logging_1_1manipulator.html...
Depends on what you want - the library is very flexible when it comes to filters. The simplest level holders looks like this:
// the higher the level, the more critical the message struct level_filter { level_filter(int default_level = 0) : m_level(default_level) {} bool is_enabled(int level) const { return level >= m_level; } void set_enabled(int level) { m_level = level; } private: int m_level; };
So the minimum needed to interoperate with LOG_IF_LEVEL is bool is_enabled(int level)?
Yes.
They don't work like that. A formatter gets a string as argument to its operator(), and it manipulates that string. So each manipulator works isolated from the other formatters.
In place manipulation. Doh. (Sounds like I've been doing too much functional programming recently)
:) Best, John -- http://John.Torjo.com -- C++ expert http://blog.torjo.com ... call me only if you want things done right