scala.meta.internal.parsers.NestedContext.scala Maven / Gradle / Ivy

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Scalameta APIs for parsing and their baseline implementation

There is a newer version: 4.12.2

package scala.meta.internal.parsers

/** Utility for tracking a context, like whether we are inside a pattern or a quote. */
private[parsers] trait NestedContext {
  private var nested = 0
  def within[T](body: => T): T = {
    nested += 1
    try {
      body
    } finally {
      nested -= 1
    }
  }
  def isInside() = nested > 0
}

private[parsers] object QuotedSpliceContext extends NestedContext

private[parsers] object QuotedPatternContext extends NestedContext

private[parsers] object ReturnTypeContext extends NestedContext