Reason for not supporting float/double etc in attributes?

[wonbinkanglg]

So, I wanted to declare some custom attributes for containing scaling value, in double/float.
I noticed flatc will give error claiming unsupported type. Also noted on doc, only string and int types are supported.
Any idea why?

I am considering adding double support by parsing string containing real numbers with decimal point as double, eg) "0.001". Seeing how this is rather simple matter, was wondering if there was a strict reason to forbid floats for attributes.