Re: [Boost-users] [ICL] Can't use an enum as map value

2014-03-19 13:11 GMT+01:00 Oodini :

Hello,

I declared an interval_map :

interval_map myMap;

Later, I do :

SomeEnumType enumValue = SOME_ENUM_VALUE; myMap.add(std::make_pair(disxrete_interval(10,17), SOME_ENUM_VALUE);

But that doesn't compile.

It seems that ICL wants the += operator must eb defined for value type (why ???).

What can I do ?

Hi, If I remember correctly, you need to supply a combiner. The default combiner uses +=. A combiner produces a new value for overlapping intervals. Consider (pseudocode): myMap.add( [10,17), SOME_ENUM_VALUE ); myMap.add( [16,18), OTHER_ENUM_VALUE ); The combiner decides, what should be the value in [16,17). In this case, tries to += the OTHER_ENUM_VALUE to the existing SOME_ENUM_VALUE. HTH, Kris