bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/expressions/list/ListGuard.java

   1 package org.simantics.scl.compiler.elaboration.expressions.list;
   2
   3 import org.simantics.scl.compiler.elaboration.contexts.SimplificationContext;
   4 import org.simantics.scl.compiler.elaboration.contexts.TranslationContext;
   5 import org.simantics.scl.compiler.elaboration.contexts.TypingContext;
   6 import org.simantics.scl.compiler.elaboration.expressions.Expression;
   7 import org.simantics.scl.compiler.elaboration.expressions.Variable;
   8 import org.simantics.scl.compiler.errors.Locations;
   9 import org.simantics.scl.compiler.types.Type;
  10 import org.simantics.scl.compiler.types.Types;
  11
  12 import gnu.trove.map.hash.TObjectIntHashMap;
  13 import gnu.trove.set.hash.THashSet;
  14 import gnu.trove.set.hash.TIntHashSet;
  15
  16 public class ListGuard extends ListQualifier {
  17     public Expression condition;
  18
  19     public ListGuard(Expression condition) {
  20         this.condition = condition;
  21     }
  22
  23     @Override
  24     public void checkType(TypingContext context) {
  25         condition.checkType(context, Types.BOOLEAN);
  26     }
  27
  28     @Override
  29     public void collectVars(TObjectIntHashMap<Variable> allVars,
  30             TIntHashSet vars) {
  31         condition.collectVars(allVars, vars);
  32     }
  33
  34     @Override
  35     public void collectFreeVariables(THashSet<Variable> vars) {
  36         condition.collectFreeVariables(vars);
  37     }
  38
  39     @Override
  40     public CompiledQualifier compile(SimplificationContext context) {
  41         return new CompiledQualifier(
  42                 context.guardList(condition.copy()),
  43                 context.tuple());
  44     }
  45
  46     @Override
  47     public void resolve(TranslationContext context) {
  48         condition = condition.resolve(context);
  49     }
  50
  51     @Override
  52     public void collectEffects(THashSet<Type> effects) {
  53         condition.collectEffects(effects);
  54     }
  55
  56     @Override
  57     public void setLocationDeep(long loc) {
  58         if(location == Locations.NO_LOCATION) {
  59             location = loc;
  60             condition.setLocationDeep(loc);
  61         }
  62     }
  63
  64     @Override
  65     public void accept(ListQualifierVisitor visitor) {
  66         visitor.visit(this);
  67     }
  68
  69     @Override
  70     public ListQualifier accept(ListQualifierTransformer transformer) {
  71         return transformer.transform(this);
  72     }
  73 }