ODAttribute.mc4

/* (c) https://github.com/MontiCore/monticore */
package de.monticore;

/* This is a MontiCore stable grammar.
 * Adaptations -- if any -- are conservative. */

/**
   ODAttribute is part of the OD grammars
   describing UML object diagrams (in the UML/P variant).

   ODAttribute defines additional forms of attributes, 
   including lists and maps.   
*/

component grammar ODAttribute extends de.monticore.ODBasis {

  /*========================================================================*/
  /*============================ Attribute =================================*/
  /*========================================================================*/

  /** ASTODList represents a List of ODValues.
      (Whether the order is relevant is not decided here.
      Therefore, it is also possible to store sets this way.)
    @attribute oDValue List of ODValue
  */
  ODList implements ODValue =
    "[" (ODValue || ",")* "]";

  /** ASTODMap represents a Map of values
    @attribute oDMapElement List of ODMapElements
  */
  ODMap implements ODValue =
    "[" (ODMapElement || ",")* "]";

  /** ASTODMapElement represents a Map element of ODMap.
      It can be either a concrete ODObject or a concrete ODValue.
    @attribute key Key element of the key value pair
    @attribute val Value element of the key value pair
  */
  ODMapElement =
    key:ODValue "->" val:ODValue;

}