Fix missing asAlias

Author: wu-hui

google-cloud-firestore/src/main/java/com/google/cloud/firestore/pipeline/Expressions.kt

@@ -49,6 +49,8 @@ internal fun exprToValue(expr: Expr): Value {
 
 interface Projectable
 
+internal class ExprWithAlias internal constructor(val alias: String, val expr: Expr) : Projectable
+
 interface Expr {
  // Infix functions returning Function subclasses
  infix fun equal(other: Expr) = Equal(this, other)
@@ -143,6 +145,10 @@ interface Expr {
  fun descending(): Ordering {
  return Ordering(this, Direction.DESCENDING)
  }
+
+ fun asAlias(alias: String): Projectable {
+ return ExprWithAlias(alias, this)
+ }
 }
 
 // Convenient class for internal usage

google-cloud-firestore/src/main/java/com/google/cloud/firestore/pipeline/Stages.kt

@@ -104,10 +104,15 @@ internal constructor(
  }
  }
 
- class FindNearestOptions(val limit: Long, val output: Field? = null) {
+ class FindNearestOptions internal constructor(
+ val limit: Long,
+ val distanceMeasure: DistanceMeasure,
+ val output: Field? = null
+ ) {
  companion object {
  @JvmStatic
- fun newInstance(limit: Long, output: Field? = null) = FindNearestOptions(limit, output)
+ fun newInstance(limit: Long, distanceMeasure: DistanceMeasure, output: Field? = null) =
+ FindNearestOptions(limit, distanceMeasure, output)
  }
  }
 }