package dotty.tools.dotc package core import annotation.tailrec import Symbols._ import Contexts._, Names._ object Decorators { implicit class StringDecorator(val s: String) extends AnyVal with PreName { def toTypeName: TypeName = typeName(s) def toTermName: TermName = termName(s) def toEncodedTypeName = encodedTypeName(s) def toEncodedTermName = encodedTermName(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) } } }