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

   1 package org.simantics.scl.compiler.elaboration.expressions.list;
   2
   3 import java.util.Set;
   4
   5 import org.simantics.scl.compiler.elaboration.contexts.SimplificationContext;
   6 import org.simantics.scl.compiler.elaboration.contexts.TranslationContext;
   7 import org.simantics.scl.compiler.elaboration.contexts.TypingContext;
   8 import org.simantics.scl.compiler.elaboration.expressions.Case;
   9 import org.simantics.scl.compiler.elaboration.expressions.EVariable;
  10 import org.simantics.scl.compiler.elaboration.expressions.Expression;
  11 import org.simantics.scl.compiler.elaboration.expressions.Variable;
  12 import org.simantics.scl.compiler.errors.Locations;
  13 import org.simantics.scl.compiler.types.TMetaVar;
  14 import org.simantics.scl.compiler.types.Types;
  15 import org.simantics.scl.compiler.types.kinds.Kinds;
  16
  17 import gnu.trove.map.hash.TObjectIntHashMap;
  18 import gnu.trove.set.hash.TIntHashSet;
  19
  20 public class ListGenerator extends ListQualifier {
  21     public Expression pattern;
  22     public Expression value;
  23
  24     public ListGenerator(Expression pattern, Expression value) {
  25         this.pattern = pattern;
  26         this.value = value;
  27     }
  28
  29     @Override
  30     public void checkType(TypingContext context) {
  31         TMetaVar componentType = Types.metaVar(Kinds.STAR);
  32         value.checkType(context, Types.apply(Types.LIST, componentType));
  33         pattern.checkTypeAsPattern(context, componentType);
  34     }
  35
  36     @Override
  37     public void collectVars(TObjectIntHashMap<Variable> allVars,
  38             TIntHashSet vars) {
  39         value.collectVars(allVars, vars);
  40     }
  41
  42     @Override
  43     public CompiledQualifier compile(SimplificationContext context) {
  44         if(pattern instanceof EVariable)
  45             return new CompiledQualifier(value, pattern);
  46         else {
  47             Set<Variable> variables = pattern.getFreeVariables();
  48             Variable[] variableArray = variables.toArray(new Variable[variables.size()]);
  49             Expression[] variableExps = new Expression[variableArray.length];
  50             for(int i=0;i<variableArray.length;++i)
  51                 variableExps[i] = new EVariable(variableArray[i]);
  52             Expression newPattern = context.tuple(variableExps);
  53
  54             EVariable blank = context.blank();
  55             blank.getVariable().setType(pattern.getType());
  56
  57             return new CompiledQualifier(
  58                     context.concatMap(
  59                             context.lambda(
  60                                     new Case(pattern, context.singletonList(newPattern.copy())),
  61                                     new Case(blank, context.emptyList(newPattern.getType()))
  62                                     ),
  63                             value
  64                             ),
  65                     newPattern);
  66         }
  67     }
  68
  69     @Override
  70     public void resolve(TranslationContext context) {
  71         value = value.resolve(context);
  72         pattern = pattern.resolveAsPattern(context);
  73     }
  74
  75     @Override
  76     public void setLocationDeep(long loc) {
  77         if(location == Locations.NO_LOCATION) {
  78             location = loc;
  79             pattern.setLocationDeep(loc);
  80             value.setLocationDeep(loc);
  81         }
  82     }
  83
  84     @Override
  85     public void accept(ListQualifierVisitor visitor) {
  86         visitor.visit(this);
  87     }
  88
  89     @Override
  90     public ListQualifier accept(ListQualifierTransformer transformer) {
  91         return transformer.transform(this);
  92     }
  93 }