bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/expressions/block/RuleStatement.java

   1 package org.simantics.scl.compiler.elaboration.expressions.block;
   2
   3 import org.simantics.scl.compiler.elaboration.contexts.EnvironmentalContext;
   4 import org.simantics.scl.compiler.elaboration.contexts.ReplaceContext;
   5 import org.simantics.scl.compiler.elaboration.contexts.TranslationContext;
   6 import org.simantics.scl.compiler.elaboration.expressions.Expression;
   7 import org.simantics.scl.compiler.elaboration.query.Query;
   8 import org.simantics.scl.compiler.errors.Locations;
   9
  10 public class RuleStatement extends Statement {
  11
  12     public Expression head;
  13     public Query body;
  14
  15     public RuleStatement(Expression head, Query body) {
  16         this.head = head;
  17         this.body = body;
  18     }
  19
  20     @Override
  21     public Expression toExpression(EnvironmentalContext context, boolean monadic,
  22             Expression in) {
  23         throw new UnsupportedOperationException();
  24     }
  25
  26     @Override
  27     public void setLocationDeep(long loc) {
  28         if(location == Locations.NO_LOCATION) {
  29             location = loc;
  30             head.setLocationDeep(loc);
  31             body.setLocationDeep(loc);
  32         }
  33     }
  34
  35     @Override
  36     public void resolvePattern(TranslationContext context) {
  37         head = head.resolveAsPattern(context);
  38     }
  39
  40     @Override
  41     public boolean mayBeRecursive() {
  42         return true;
  43     }
  44
  45     @Override
  46     public Statement replace(ReplaceContext context) {
  47         return new RuleStatement(head.replaceInPattern(context), body.replace(context));
  48     }
  49
  50     @Override
  51     public void accept(StatementVisitor visitor) {
  52         visitor.visit(this);
  53     }
  54
  55     @Override
  56     public StatementGroup getStatementGroup() {
  57         return StatementGroup.Rule;
  58     }
  59 }