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

   1 package org.simantics.scl.compiler.elaboration.expressions.list;\r
   2 \r
   3 import gnu.trove.map.hash.TObjectIntHashMap;\r
   4 import gnu.trove.set.hash.THashSet;\r
   5 import gnu.trove.set.hash.TIntHashSet;\r
   6 \r
   7 import org.simantics.scl.compiler.elaboration.contexts.SimplificationContext;\r
   8 import org.simantics.scl.compiler.elaboration.contexts.TranslationContext;\r
   9 import org.simantics.scl.compiler.elaboration.contexts.TypingContext;\r
  10 import org.simantics.scl.compiler.elaboration.expressions.Case;\r
  11 import org.simantics.scl.compiler.elaboration.expressions.EVariable;\r
  12 import org.simantics.scl.compiler.elaboration.expressions.Expression;\r
  13 import org.simantics.scl.compiler.elaboration.expressions.Variable;\r
  14 import org.simantics.scl.compiler.elaboration.expressions.VariableProcedure;\r
  15 import org.simantics.scl.compiler.errors.Locations;\r
  16 import org.simantics.scl.compiler.internal.elaboration.utils.ExpressionDecorator;\r
  17 import org.simantics.scl.compiler.types.TMetaVar;\r
  18 import org.simantics.scl.compiler.types.Type;\r
  19 import org.simantics.scl.compiler.types.Types;\r
  20 import org.simantics.scl.compiler.types.kinds.Kinds;\r
  21 \r
  22 public class ListGenerator extends ListQualifier {\r
  23     public Expression pattern;\r
  24     public Expression value;\r
  25     \r
  26     public ListGenerator(Expression pattern, Expression value) {\r
  27         this.pattern = pattern;\r
  28         this.value = value;\r
  29     }\r
  30     \r
  31     @Override\r
  32     public void checkType(TypingContext context) {\r
  33         TMetaVar componentType = Types.metaVar(Kinds.STAR);\r
  34         value.checkType(context, Types.apply(Types.LIST, componentType));\r
  35         pattern.checkTypeAsPattern(context, componentType);\r
  36     }\r
  37 \r
  38     @Override\r
  39     public void collectRefs(TObjectIntHashMap<Object> allRefs,\r
  40             TIntHashSet refs) {\r
  41         value.collectRefs(allRefs, refs);\r
  42     }\r
  43 \r
  44     @Override\r
  45     public void collectVars(TObjectIntHashMap<Variable> allVars,\r
  46             TIntHashSet vars) {\r
  47         value.collectVars(allVars, vars);\r
  48     }\r
  49 \r
  50     @Override\r
  51     public void collectFreeVariables(THashSet<Variable> vars) {\r
  52         value.collectFreeVariables(vars);\r
  53         pattern.collectFreeVariables(vars);\r
  54     }\r
  55 \r
  56     @Override\r
  57     public CompiledQualifier compile(SimplificationContext context) {\r
  58         if(pattern instanceof EVariable)\r
  59             return new CompiledQualifier(value, pattern);\r
  60         else {\r
  61             THashSet<Variable> variables = pattern.getFreeVariables();\r
  62             Variable[] variableArray = variables.toArray(new Variable[variables.size()]);\r
  63             Expression[] variableExps = new Expression[variableArray.length];\r
  64             for(int i=0;i<variableArray.length;++i)\r
  65                 variableExps[i] = new EVariable(variableArray[i]);\r
  66             Expression newPattern = context.tuple(variableExps);\r
  67             \r
  68             EVariable blank = context.blank();\r
  69             blank.getVariable().setType(pattern.getType());\r
  70             \r
  71             return new CompiledQualifier(\r
  72                     context.concatMap(\r
  73                             context.lambda(\r
  74                                     new Case(pattern, context.singletonList(newPattern.copy())),\r
  75                                     new Case(blank, context.emptyList(newPattern.getType()))\r
  76                                     ), \r
  77                             value\r
  78                             ), \r
  79                     newPattern);\r
  80         }\r
  81     }\r
  82 \r
  83     @Override\r
  84     public void resolve(TranslationContext context) {\r
  85         value = value.resolve(context);\r
  86         pattern = pattern.resolveAsPattern(context);\r
  87     }\r
  88     \r
  89     @Override\r
  90     public void decorate(ExpressionDecorator decorator) {\r
  91         value = value.decorate(decorator);\r
  92         pattern = pattern.decorate(decorator);\r
  93     }\r
  94     \r
  95     @Override\r
  96     public void collectEffects(THashSet<Type> effects) {\r
  97         pattern.collectEffects(effects);\r
  98         value.collectEffects(effects);\r
  99     }\r
 100     \r
 101     @Override\r
 102     public void setLocationDeep(long loc) {\r
 103         if(location == Locations.NO_LOCATION) {\r
 104             location = loc;\r
 105             pattern.setLocationDeep(loc);\r
 106             value.setLocationDeep(loc);\r
 107         }\r
 108     }\r
 109     \r
 110     @Override\r
 111     public void accept(ListQualifierVisitor visitor) {\r
 112         visitor.visit(this);\r
 113     }\r
 114     \r
 115     @Override\r
 116     public void forVariables(VariableProcedure procedure) {\r
 117         value.forVariables(procedure);\r
 118     }\r
 119     \r
 120     @Override\r
 121     public ListQualifier accept(ListQualifierTransformer transformer) {\r
 122         return transformer.transform(this);\r
 123     }\r
 124 }\r