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Diffstat (limited to 'src/concurrent/qtconcurrentfilter.cpp')
| -rw-r--r-- | src/concurrent/qtconcurrentfilter.cpp | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/src/concurrent/qtconcurrentfilter.cpp b/src/concurrent/qtconcurrentfilter.cpp index 3e3ed7cf68..d4e4656127 100644 --- a/src/concurrent/qtconcurrentfilter.cpp +++ b/src/concurrent/qtconcurrentfilter.cpp @@ -142,12 +142,19 @@ \section2 Using Function Objects QtConcurrent::filter(), QtConcurrent::filtered(), and - QtConcurrent::filteredReduced() accept function objects, which can be used to + QtConcurrent::filteredReduced() accept function objects + for the filter function. These function objects can be used to add state to a function call. The result_type typedef must define the result type of the function call operator: \snippet code/src_concurrent_qtconcurrentfilter.cpp 13 + For the reduce function, function objects are not directly + supported. Function objects can, however, be used + when the type of the reduction result is explicitly specified: + + \snippet code/src_concurrent_qtconcurrentfilter.cpp 14 + \section2 Wrapping Functions that Take Multiple Arguments If you want to use a filter function takes more than one argument, you can |