diff options
Diffstat (limited to 'include/gras/block.hpp')
| -rw-r--r-- | include/gras/block.hpp | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/include/gras/block.hpp b/include/gras/block.hpp index bddc0f4..70c570c 100644 --- a/include/gras/block.hpp +++ b/include/gras/block.hpp @@ -163,14 +163,18 @@ struct GRAS_API Block : Element void erase_input_tags(const size_t which_input); /*! - * Overload me to implement tag propagation logic: + * Overload me to implement custom tag propagation logic: * * Propagate tags will be given an iterator for all input tags * whose offset counts is less than the number of items consumed. - * It is the job of the propagate_tags overload to + * It is the job of the propagate_tags overloaded function to * propagate tags to the downstream and interpolate the offset. - * By default, the propagate_tags implementation is a NOP. - * Also, the user may simple propagate tags from within work. + * + * By default, the propagate_tags implementation is to: + * broadcast each consumed input tags to all output ports + * using the local input offset as the local output offset. + * + * Also, the user may simply propagate tags from within work. */ virtual void propagate_tags(const size_t which_input, const TagIter &iter); |