Broadcasting `$` as a binary operator

[stevengj]

@CameronBieganek

I’m guessing it has to do with a parsing ambiguity related to expression interpolation, or something like that, but I can’t point to exactly what the issue is. Does anyone know why binary $ is excluded from broadcasting?

From parse more dot operators, parse .= with assignment precedence by stevengj · Pull Request #17393 · JuliaLang/julia · GitHub :

The exceptions are operators with very special syntactic meanings, like $ and ||. (Some of these could be allowed, but I wanted to be conservative to start with).

The case of $ was never re-visited, apparently.