Symbol for wave's data in assignment statements

It would be great if there was a symbol that stood in for the data of the wave on the receiving end of an assignment statement. For example, imagine that the data in a wave was to be exponentiated:

aWave = 2^aWave

The proposed symbol would make this command equivalent to the one above:

aWave = 2^d             //i.e., d returns the value of the wave being assigned at the index being evaluated

"d" seems appropriate, since the usage is reminiscent of SetScale's "d" for the "data full scale"