org.opencypher.v9_0.parser.CommandHelper.scala Maven / Gradle / Ivy

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/*
 * Copyright (c) Neo4j Sweden AB (http://neo4j.com)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.opencypher.v9_0.parser

import org.opencypher.v9_0.ast
import org.parboiled.scala.Parser
import org.parboiled.scala.Rule0
import org.parboiled.scala.Rule1

// Common methods for schema and administration commands
trait CommandHelper extends Parser
                    with Base
                    with Query {
  def IndexKeyword: Rule0 = keyword("INDEXES") | keyword("INDEX")

  def ConstraintKeyword: Rule0 = keyword("CONSTRAINTS") | keyword("CONSTRAINT")

  def ShowCommandClauses: Rule1[Either[(ast.Yield, Option[ast.Return]), ast.Where]] = rule("YIELD, WHERE") {
    (Yield ~~ optional(ReturnWithoutGraph)) ~~> ((y,r) => Left(y,r)) |
      (Where ~~>> (where => _ => Right(where)))
  }
}