Is there any intentional reason why if_keyword_loc is not named keyword_loc as in unless_node?

[r7kamura]

I think the unless keyword is the opposite of the if keyword in Ruby syntax¹.

On the other hand, there is a slight difference in the naming of the two in prism's AST. While if_node has the field if_keyword_loc, the unlless_node has keyword_loc instead of unless_keyword_loc.

If the property names were identical, I could successfully treat them as opposite pairs in my application using prism, but I had to write a conditional branch because of this difference.

Is there an intentional reason for this difference?

Footnotes

1. Although strictly speaking, there is a difference in whether or not eislf can be used. ↩