libboost-signals-dev - 1.67.0.1 main

This package forms part of the Boost C++ Libraries collection.
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Signals represent callbacks with multiple targets, and are also
called publishers or events in similar systems. Signals are connected
to some set of slots, which are callback receivers (also called event
targets or subscribers), which are called when the signal is
"emitted."
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This package is a dependency package, which depends on Debian's default
Boost version (currently 1.67).