object Sequence extends Serializable
Contains an optimized version of Sequence called Sequence.Flat that
combines a tree of Sequence nodes from the left, into a single
tail-recursive function working over a Vector
of their contents.
Intentionally completely type-unsafe internally, using casting all
over the place, because it's near impossible to make the variable-length
heterogenous-typed list type-safe without going crazy. If constructed by
flatten
-ing out a Sequence, the types are checked when the Sequence
was constructed, so it's still safe.
Appears to speed up the scalaparse.PerfTests benchmark by around 2.5x
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case class
Chain
[R, Elem, Repr](p: Parser[R, Elem, Repr], cut: Boolean)(ev: Sequencer[R, R, R]) extends Product with Serializable
The contents of a Sequence node, minus the left subtree.
- case class Flat [R, Elem, Repr](p0: Parser[R, Elem, Repr], ps: ArrayBuffer[Chain[R, Elem, Repr]])(implicit repr: ReprOps[Elem, Repr]) extends Parser[R, Elem, Repr] with Product with Serializable
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def
flatten[R, Elem, Repr](s: Sequence[R, R, R, Elem, Repr])(implicit repr: ReprOps[Elem, Repr]): Flat[R, Elem, Repr]
The types here are all lies.
The types here are all lies. It's ok, just trust the code to do the right thing!
A ~ B ~ C ~ D ((A ~ B) ~ C) ~ D
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