[Pitch] Expanding #if to declaration modifiers as well as attributes

[Douglas_Gregor]

@harlanhaskins

Do y'all think this is something that would be desirable? Or are there Reasons™ why I should abandon pursuing this?

Heh, I proposed this in the original pitch, and was convinced that modifiers weren't necessary or couldn't work. I recommend scanning that thread to see if any real problems came up.

Doug