railt/graphql

/**
 * --------------------------------------------------------------------------
 *  GraphQL Enum Values
 * --------------------------------------------------------------------------
 *
 * Enum values are represented as unquoted names (ex. MOBILE_WEB). It is
 * recommended that Enum values be “all caps”. Enum values are only used
 * in contexts where the precise enumeration type is known. Therefore it’s
 * not necessary to supply an enumeration type name in the literal.
 *
 * @see https://facebook.github.io/graphql/June2018/#EnumValue
 */

ConstLiteral -> {
    return new Expr\Literal\ConstLiteralNode($children[0]);
}
  : Identifier()
  ;