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package dotty.tools.dotc
package core
import annotation.tailrec
import Symbols._
import Contexts._, Names._
object Decorators {
implicit class toTypeNameDecorator(val s: String) extends AnyVal {
def toTypeName(implicit context: Context): TypeName =
context.names.newTypeName(s)
}
implicit class toTermNameDecorator(val s: String) extends AnyVal {
def toTermName(implicit context: Context): TermName =
context.names.newTermName(s)
}
implicit class SymbolIteratorDecorator(val it: Iterator[Symbol]) extends AnyVal {
final def findSymbol(p: Symbol => Boolean): Symbol = {
while (it.hasNext) {
val sym = it.next
if (p(sym)) return sym
}
NoSymbol
}
}
final val MaxRecursions = 1000
implicit class ListDecorator[T](val xs: List[T]) extends AnyVal {
def filterConserve(p: T => Boolean): List[T] = {
def loop(xs: List[T], nrec: Int): List[T] = xs match {
case Nil => xs
case x :: xs1 =>
if (nrec < MaxRecursions) {
val ys1 = loop(xs1, nrec + 1)
if (p(x))
if (ys1 eq xs1) xs else x :: ys1
else
ys1
} else xs filter p
}
loop(xs, 0)
}
}
}
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