I'm reviewing a sample program code and found this
line:
auto prerequisite
=
task([](){});
What
is the meaning of those combined parentheses
([](){})
I'm a cpp
programmer but do not know advance cpp (c11+) which this Microsoft example is written
at. Googling didn't help, and I don't know the name of those
operators.
[](){}
is a href="https://en.cppreference.com/w/cpp/language/lambda" rel="noreferrer">lambda
expression that creates a function object that has non-zero size and does
nothing.
This is probably to avoid checking
whether prerequisite
is valid/exists - it is always valid, but
may do nothing.
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