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package dotty.tools.dotc
package core
import Decorators._
import Periods._
import Names._
import Phases._
import Types._
import SubTypers._
object Contexts {
val NoContext: Context = null
abstract class Context extends Periods {
val underlying: Context
val root: RootContext
val period: Period
def constraints: Constraints
def subTyper: SubTyper
def names: NameTable
def phase: Phase = ???
def stableInterval: Interval = ???
def erasedTypes: Boolean = ???
}
abstract class SubContext(val underlying: Context) extends Context {
val root: RootContext = underlying.root
val period: Period = underlying.period
val constraints = underlying.constraints
def names: NameTable = root.names
lazy val subTyper =
if (constraints eq underlying.constraints) underlying.subTyper
else new SubTyper(this)
}
class RootContext extends Context
with Symbols
with Denotations
with DenotationTransformers
with Types {
val underlying: Context = throw new UnsupportedOperationException("RootContext.underlying")
def subTyper: SubTyper = ???
val root: RootContext = this
val period = periodOf(NoRunId, NoPhaseId)
val names: NameTable = new NameTable
val variance = 1
var lastPhaseId: Int = NoPhaseId
lazy val definitions = new Definitions()(this)
val constraints: Constraints = Map()
}
private final val initialUniquesCapacity = 4096
}
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