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One last flurry with the broom before I leave you slobs to code
in your own filth. Eliminated all the trailing whitespace I
could manage, with special prejudice reserved for the test cases
which depended on the preservation of trailing whitespace.
Was reminded I cannot figure out how to eliminate the trailing
space on the "scala> " prompt in repl transcripts. At least
reduced the number of such empty prompts by trimming transcript
code on the way in.
Routed ConsoleReporter's "printMessage" through a trailing
whitespace stripping method which might help futureproof
against the future of whitespace diseases. Deleted the up-to-40
lines of trailing whitespace found in various library files.
It seems like only yesterday we performed whitespace surgery
on the whole repo. Clearly it doesn't stick very well. I suggest
it would work better to enforce a few requirements on the way in.
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catch handlers are now also translated by the virtualizing pattern matcher
emit type-based switches when possible, fallback to catch-all with full pattern match
(the logic used to emit constant-based switches was generalized to type-based switches,
abstracting out how to refer to the scrutinee and the shape of a default/catch-all case)
this was the last missing piece of essential functionality
now the virtualizing pattern matcher and the old one are mutually exclusive:
-Yvirtpatmat disables the old matcher logic completely
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Added a bunch of tests that cover changes related
to switches that were applied to Yvirtpatmat
implementation.
Note: I didn't add those tests progressively because
my changes fix trees after typer phase but do not
affect resulting bytecode. How come? It's because
-Yvirtpatmat will emit pattern for switches and then
the old pattern matcher implementation would transform
them in the old fashion in explicitouter. We cannot
disable the old pattern matcher in explicitouter yet
because it doesn't handle patterns used for catching
exceptions.
Thus, consider this as a sign of the fact that Yvirtpatmat
is still work in progress.
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