can_union

Determines if value1 and value2 can be non-trivially unioned.

Any two values can be trivially unioned by adding both of them to a GstValueList. However, certain types have the possibility to be unioned in a simpler way. For example, an integer range and an integer can be unioned if the integer is a subset of the integer range. If there is the possibility that two values can be unioned, this function returns true.

Parameters:

value1	a value to union
value2	another value to union

Returns:

true if there is a function allowing the two values to be unioned.