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• ldbc-query-builder_native0.4_3
• 0.3.0-beta8
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• Extract.scala

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ldbc.query.builder.interpreter.Extract.scala Maven / Gradle / Ivy

/**
 * Copyright (c) 2023-2024 by Takahiko Tominaga
 * This software is licensed under the MIT License (MIT).
 * For more information see LICENSE or https://opensource.org/licenses/MIT
 */

package ldbc.query.builder.interpreter

/** A type function to pull a type parameter it has from a type with one type parameter. */
type Extract[T] = T match
  case Option[t] => Extract[t]
  case Array[t]  => Extract[t]
  case List[t]   => Extract[t]
  case Seq[t]    => Extract[t]
  case Set[t]    => Extract[t]
  case _         => T

/** A type function that derives its type from the type parameters that Option has. */
type ExtractOption[T] = T match
  case Option[t] => Extract[t]
  case _         => T