allow standalone dotted ops, parse .op as (. op)

[simeonschaub]

A second attempt at #34156, should supersede #35706. This implements @JeffBezanson's suggestion in #35706 (comment), that we parse .op as (. op), when it isn't functioning as an operator. We then lower this to Base.BroadcastFunction(op), just as in #35706. Could we run PkgEval on this once tests pass to see whether this qualifies as a minor change?
closes #34156

[JeffBezanson]

It didn't occur to me that with this, :.+ and :(.+) are different. A bit of a gotcha, but I'm not sure if we can do anything about it. Are there any dot operators that require the parentheses to be parsed after :? I think the answer is no, which is good since at least you can always just delete the parens if you need to.

[simeonschaub]

You certainly know this better than me, but I think currently every operator, with or without the dot, should be its own token, so you should never actually need those parentheses. Even then, these could still be constructed by using the Symbol constructor directly.

[simeonschaub]

From my side, if you don't have any further comments, this should now be ready to do a PkgEval run.

[simeonschaub]

The test failures seem unrelated.

[simeonschaub]

Would it be possible to do a PkgEval run now, so this can be discussed in triage tomorrow?

[simeonschaub]

@JeffBezanson Bump. 🙂

[JeffBezanson]

👍 from triage.

[JeffBezanson]

@nanosoldier runtests(ALL, vs = ":master")

[nanosoldier]

Something went wrong when running your job:

NanosoldierError: error when preparing/pushing to report repo: failed process: Process(`git pull -X ours`, ProcessExited(128)) [128]

Unfortunately, the logs could not be uploaded.
cc @maleadt

[maleadt]

PkgEval has migrated systems; let's try this again:

@nanosoldier runtests(ALL, vs = ":master")

[nanosoldier]

Your package evaluation job has completed - possible new issues were detected. A full report can be found here. cc @maleadt

[simeonschaub]

The failures all look unrelated to this PR. 🥳