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From: Olaf Krzikalla (krzikalla_at_[hidden])
Date: 2008-05-30 10:09:09
Hi,
is it possible to check a function bound to boost::function, if a
particular argument is actually needed?
Example:
---- struct bar {}; typedef boost::function<void(int, bar&)> tSlot; void foo(tSlot& s); void barNeeded(int, bar&); void barNeeded(int); void callfoo() { foo(boost::bind(&barNeeded, _1, _2)); foo(boost::bind(&barNotNeeded, _1)); } void foo(tSlot& s) { bar b; expensive_calculation(b); s(1, b); } ---- How can I prevent expensive_calculation if the function barNotNeeded was bound to tSlot? Best regards Olaf Krzikalla
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