More user-friendly pretty printing of types #2835
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Otherwise we would print Foo[([+scala$Option$$A] => Option[+A])^] which is ugly and not even coherent
Currently, this flag only hides the "^" we display on inferred types, but in the future we can hide more stuff that shouldn't be seen by the user in error messages and in the IDE.
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Trying to print the type of `List(1,2)` in the repl launched with `-Yplain-printer` previously resulted in an infinite recursion (stopped by PlainPrinter#controlled) because `refinementChain(tp)` will return a list of only one argument for a RefinedType which is also an AppliedType.
odersky
approved these changes
Jul 6, 2017
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