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Diffstat (limited to 'src/concurrent/qtconcurrentmap.cpp')
| -rw-r--r-- | src/concurrent/qtconcurrentmap.cpp | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/src/concurrent/qtconcurrentmap.cpp b/src/concurrent/qtconcurrentmap.cpp index 884bf4b4f9a..1ba5de355b0 100644 --- a/src/concurrent/qtconcurrentmap.cpp +++ b/src/concurrent/qtconcurrentmap.cpp @@ -192,12 +192,19 @@ \section2 Using Function Objects QtConcurrent::map(), QtConcurrent::mapped(), and - QtConcurrent::mappedReduced() accept function objects, which can be used to + QtConcurrent::mappedReduced() accept function objects + for the map 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_qtconcurrentmap.cpp 14 + 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_qtconcurrentmap.cpp 11 + \section2 Wrapping Functions that Take Multiple Arguments If you want to use a map function that takes more than one argument you can |