TBB Pipeline Compile Errors

[creatiwit]

I am trying to build a TBB pipeline with the new syntax as described in the tutorial, using tbb:filter_t as below

FILE *fd

tbb::filter_t f1( tbb::filter::serial_in_order,

MyInputFunc(fd) );

but it keeps throwing a compile error:

tbb40_20120201oss/include/tbb/pipeline.h:416: error: passing const MyInputFunc as this argument of TextSlice* MyInputFunc::operator()(tbb::interface6::flow_control&) discards qualifiers

It works fine with the inheritance based old filter API.

tbb::filter_t f1( tbb::filter::serial_in_order, MyInputFunc(fd) );

[creatiwit]

Never mind looking at pipeline.h, I realized it requires const functions. Changing the operator() to const, fixed it.

I would recommend updating the tutorial and documentation to please reflect that you expect consts.