Hi! I am just trying to use libsigc++, and I need the feature that each pre-operation callback (slot) can cancel my operation by returning false.
After looking at http://libsigc.sourceforge.net/libsigc2/docs/manual/html/ch04s03.html I implemented a mashaller, only to get an error about result_type. Now I already wondered about some design issues (OutType instead of result_type, "marshaller" instead of "accumulator" etc.), which I then realized were fixed, as can be seen in the reference documentation (which I had to look at, since signal<void, my_arg_t, marshaller> was also an obsolete, non-working syntax): http://libsigc.sourceforge.net/libsigc2/docs/reference/html/classsigc_1_1signal_1_1accumulated.html Indeed, that page even contains an "interruptable_accumulator" which is exactly what I need. However, there is another (small) glitch: The for loop tries to increment n_ (C&P error from above). Hopefully someone finds the time to update the docs, apart from that libsigc++ seems to be quite neat (and the tutorial-style-docs are very helpful nevertheless!). Now I hope the runtime (per-call) performance is not too far behind my old, ugly, virtual-method-hook-class-in-std::vector solution... Ciao, / / /--/ / / ANS _______________________________________________ libsigc-list mailing list libsigc-list@gnome.org http://mail.gnome.org/mailman/listinfo/libsigc-list
