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F.53: Minor fix.

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psliwa 2016-02-04 11:05:16 +01:00
parent 4fc0beafc3
commit fdd91e959a
1 changed files with 9 additions and 7 deletions
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CppCoreGuidelines.md
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@ -3152,18 +3152,20 @@ Pointers and references to locals shouldn't outlive their scope. Lambdas that ca
##### Example, bad
{
int local_variable = 42;
background_thread.queue_work([&]{ process(local_variable); }); // Want a reference to local_variable.
// Note, that after program exists this scope, local_variable does no longer exist,
int local = 42;
thread_pool.queue_work([&]{ process(local); }); // Want a reference to local.
// Note, that after program exists this scope,
// local does no longer exist,
// therefore process() call will have undefined behavior!
}
##### Example, good
{
int local_variable = 42;
background_thread.queue_work([=]{ process(local_variable); }); // Want a copy of local_variable.
// Since a copy of local_variable is made, it will be available at all times for the call.
int local = 42;
thread_pool.queue_work([=]{ process(local); }); // Want a copy of local.
// Since a copy of local is made, it will be
// available at all times for the call.
}
##### Enforcement