c++ - Is it possible to add some condition to `boost::signal` -

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is possible add condition boost::signal. may boolean function , when emit signal should check if function returns true emit.

i don't want check condition during emitting because emitted many places. don't want check condition in slot because should not know condition.

if need emit signal many places way, add method it:

void emitsignal() {    if( /* condition */ ) {        _signal();    } }

then call emitsignal() instead of emitting signal directly.


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