JavaClassExpressions.mc4

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

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

import de.monticore.expressions.*;
import de.monticore.statements.*;
import de.monticore.types.*;

/**
 * This grammar defines Java specific class expressions like super,
 * this, etc.
 *
 * This grammar should only be included, when a mapping to Java is
 * intended and the full power of Java should be available in the
 * modelling language.
 *
 * There are also other kinds of expressions defined in the
 * grammars mentioned below. These expression definitions can safely be
 * composed if desired.
 *
 * The grammar has several extension points for types to be filled when used.
 *
 * This grammar is part of a hierarchy of expressions, which can be found
 * under
 *   https://github.com/MontiCore/monticore/blob/dev/monticore-grammar/
 *                 src/main/grammars/de/monticore/expressions/Expressions.md
 *
*/

component grammar JavaClassExpressions
          extends CommonExpressions,
          MCVarDeclarationStatements,
          MCFullGenericTypes,
          UglyExpressions {

  /*=================================================================*/

  PrimaryThisExpression implements Expression <320> =
    "this";

  ThisExpression implements Expression <280> =
    Expression "." "this";

  SuperExpression implements Expression <270> =
    Expression "." "super" SuperSuffix;

  GenericInvocationExpression implements Expression <260> =
    Expression "." PrimaryGenericInvocationExpression;

  PrimarySuperExpression implements Expression <330> =
    "super";

  /*=================================================================*/

  // access of class object uses a type
  ClassExpression implements Expression <360> =
    MCReturnType "." "class";

  // generic invocation may specify type arguments
  PrimaryGenericInvocationExpression implements Expression <370> =
    "<"(MCTypeArgument||",")+">" GenericInvocationSuffix;

  GenericInvocationSuffix
    =   ["super"] SuperSuffix
    |   ["this"] Arguments
    |   Name Arguments
    ;

  SuperSuffix
    =   Arguments
    |   "." ("<"(MCTypeArgument||",")+">")? Name Arguments?
    ;

  /*=================================================================*/

  // instance of needs a type or pattern as argument
  InstanceofPatternExpression implements Expression <140> =
    Expression "instanceof" Pattern;

  interface Pattern;

  TypePattern implements Pattern = LocalVariableDeclaration;

}