bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/expressions/block/GuardStatement.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.EBind;
   7 import org.simantics.scl.compiler.elaboration.expressions.ESimpleLet;
   8 import org.simantics.scl.compiler.elaboration.expressions.EVariable;
   9 import org.simantics.scl.compiler.elaboration.expressions.Expression;
  10 import org.simantics.scl.compiler.elaboration.expressions.Variable;
  11 import org.simantics.scl.compiler.errors.Locations;
  12
  13 public class GuardStatement extends Statement {
  14     public Expression value;
  15
  16     public GuardStatement(Expression value) {
  17         this.value = value;
  18     }
  19
  20     @Override
  21     public Expression toExpression(EnvironmentalContext context, BlockType blockType, Expression in) {
  22         if(blockType != BlockType.Normal) {
  23             Variable var = new Variable("_");
  24             return new EBind(location, blockType, new EVariable(location, var), value, in);
  25         }
  26         else
  27             return new ESimpleLet(location, null, value, in);
  28     }
  29
  30     @Override
  31     public void setLocationDeep(long loc) {
  32         if(location == Locations.NO_LOCATION) {
  33             location = loc;
  34             value.setLocationDeep(loc);
  35         }
  36     }
  37
  38     @Override
  39     public void resolvePattern(TranslationContext context) {
  40     }
  41
  42     @Override
  43     public boolean mayBeRecursive() {
  44         return false;
  45     }
  46
  47     @Override
  48     public Statement replace(ReplaceContext context) {
  49         return new GuardStatement(value.replace(context));
  50     }
  51
  52     @Override
  53     public void accept(StatementVisitor visitor) {
  54         visitor.visit(this);
  55     }
  56
  57     @Override
  58     public StatementGroup getStatementGroup() {
  59         return null;
  60     }
  61 }