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sort field accessors, necessary after typers -- apparently...
don't throw TypeError, use issueTypeError
don't run patmat phase when -Xoldpatmat
only virtualize matches when -Xexperimental
recycle cps type of match for re-typechecking:
when one of the internal cps-type-state annotations is present, strip all CPS annotations
a cps-type-state-annotated type makes no sense as an expected type (matchX.tpe is used as pt in translateMatch)
don't synth FunctionN impls during typer, only do this for PartialFunction
updated check now function synth for match is deferred until uncurry
patmat-transform try/catch with match in cps
cleanup in selective anf
remove TODO: can there be cases that are not CaseDefs -- nope
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some tests (unreachability, exhaustivity, @switch annotation checking) are still run under -Xoldpatmat,
but that will change before we go into RC mode (then the test/ partest of this commit will be reverted)
removed irrelevant dependency on patmat
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determine match strategy by typing `__match`
factored out the interface to generate code in this monad, cleaned up codegen a bit
no longer solving a context bound to determine the match strategy and the monad's type constructor
it's too expensive
don't consider implicits looking for __match
implicit search causes HUGE slowdowns -- now the overhead is about 4% compared to just assuming there's no __match in scope
to support virtualization&staging, we use the type of `__match.one` as the prototype for how to wrap "pure" types and types "in the monad"
pure types T are wrapped as P[T], and T goes into the monad as M[T], if one is defined as:
def one[T](x: P[T]): M[T]
for staging, P will typically be the Rep type constructor, and type M[T] = Rep[Option[T]]
furthermore, naive codegen no longer supplies type information -- type inference will have to work it out
optimized codegen still does, of course, and that's enough since we only bootstrap that way
TODO: improve the test (currently the condition is not represented)
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