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 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.Case;
   7 import org.simantics.scl.compiler.elaboration.expressions.EVariable;
   8 import org.simantics.scl.compiler.elaboration.expressions.Expression;
   9 import org.simantics.scl.compiler.elaboration.expressions.Variable;
  10 import org.simantics.scl.compiler.errors.Locations;
  11 import org.simantics.scl.compiler.types.TMetaVar;
  12 import org.simantics.scl.compiler.types.Type;
  13 import org.simantics.scl.compiler.types.Types;
  14 import org.simantics.scl.compiler.types.kinds.Kinds;
  15
  16 import gnu.trove.map.hash.TObjectIntHashMap;
  17 import gnu.trove.set.hash.THashSet;
  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 void collectFreeVariables(THashSet<Variable> vars) {
  44         value.collectFreeVariables(vars);
  45         pattern.collectFreeVariables(vars);
  46     }
  47
  48     @Override
  49     public CompiledQualifier compile(SimplificationContext context) {
  50         if(pattern instanceof EVariable)
  51             return new CompiledQualifier(value, pattern);
  52         else {
  53             THashSet<Variable> variables = pattern.getFreeVariables();
  54             Variable[] variableArray = variables.toArray(new Variable[variables.size()]);
  55             Expression[] variableExps = new Expression[variableArray.length];
  56             for(int i=0;i<variableArray.length;++i)
  57                 variableExps[i] = new EVariable(variableArray[i]);
  58             Expression newPattern = context.tuple(variableExps);
  59
  60             EVariable blank = context.blank();
  61             blank.getVariable().setType(pattern.getType());
  62
  63             return new CompiledQualifier(
  64                     context.concatMap(
  65                             context.lambda(
  66                                     new Case(pattern, context.singletonList(newPattern.copy())),
  67                                     new Case(blank, context.emptyList(newPattern.getType()))
  68                                     ),
  69                             value
  70                             ),
  71                     newPattern);
  72         }
  73     }
  74
  75     @Override
  76     public void resolve(TranslationContext context) {
  77         value = value.resolve(context);
  78         pattern = pattern.resolveAsPattern(context);
  79     }
  80
  81     @Override
  82     public void collectEffects(THashSet<Type> effects) {
  83         pattern.collectEffects(effects);
  84         value.collectEffects(effects);
  85     }
  86
  87     @Override
  88     public void setLocationDeep(long loc) {
  89         if(location == Locations.NO_LOCATION) {
  90             location = loc;
  91             pattern.setLocationDeep(loc);
  92             value.setLocationDeep(loc);
  93         }
  94     }
  95
  96     @Override
  97     public void accept(ListQualifierVisitor visitor) {
  98         visitor.visit(this);
  99     }
 100
 101     @Override
 102     public ListQualifier accept(ListQualifierTransformer transformer) {
 103         return transformer.transform(this);
 104     }
 105 }