bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/expressions/list/ListAssignment.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.Type;\r
  18 \r
  19 public class ListAssignment extends ListQualifier {\r
  20     public Expression pattern;\r
  21     public Expression value;\r
  22     \r
  23     public ListAssignment(Expression pattern, Expression value) {\r
  24         this.pattern = pattern;\r
  25         this.value = value;\r
  26     }\r
  27     \r
  28     @Override\r
  29     public void checkType(TypingContext context) {\r
  30         value = value.inferType(context);\r
  31         pattern.checkTypeAsPattern(context, value.getType());\r
  32     }\r
  33 \r
  34     @Override\r
  35     public void collectRefs(TObjectIntHashMap<Object> allRefs,\r
  36             TIntHashSet refs) {\r
  37         value.collectRefs(allRefs, refs);\r
  38     }\r
  39 \r
  40     @Override\r
  41     public void collectVars(TObjectIntHashMap<Variable> allVars,\r
  42             TIntHashSet vars) {\r
  43         value.collectVars(allVars, vars);\r
  44     }\r
  45 \r
  46     @Override\r
  47     public void collectFreeVariables(THashSet<Variable> vars) {\r
  48         value.collectFreeVariables(vars);\r
  49         pattern.collectFreeVariables(vars);\r
  50     }\r
  51 \r
  52     @Override\r
  53     public CompiledQualifier compile(SimplificationContext context) {\r
  54         if(pattern instanceof EVariable)\r
  55             return new CompiledQualifier(context.singletonList(value), pattern);\r
  56         else {\r
  57             THashSet<Variable> variables = pattern.getFreeVariables();\r
  58             Variable[] variableArray = variables.toArray(new Variable[variables.size()]);\r
  59             Expression[] variableExps = new Expression[variableArray.length];\r
  60             for(int i=0;i<variableArray.length;++i)\r
  61                 variableExps[i] = new EVariable(variableArray[i]);\r
  62             Expression newPattern = context.tuple(variableExps);\r
  63             \r
  64             EVariable blank = context.blank();\r
  65             blank.getVariable().setType(pattern.getType());\r
  66             \r
  67             return new CompiledQualifier(\r
  68                 context.match(value, \r
  69                         new Case(pattern, context.singletonList(newPattern.copy())),\r
  70                         new Case(blank, context.emptyList(newPattern.getType()))\r
  71                         ),\r
  72                         newPattern\r
  73                     );\r
  74         }\r
  75     }\r
  76 \r
  77     @Override\r
  78     public void resolve(TranslationContext context) {\r
  79         value = value.resolve(context);\r
  80         pattern = pattern.resolveAsPattern(context);\r
  81     }\r
  82 \r
  83     @Override\r
  84     public void decorate(ExpressionDecorator decorator) {\r
  85         value = value.decorate(decorator);\r
  86         pattern = pattern.decorate(decorator);\r
  87     }\r
  88 \r
  89     @Override\r
  90     public void collectEffects(THashSet<Type> effects) {\r
  91         pattern.collectEffects(effects);\r
  92         value.collectEffects(effects);\r
  93     }\r
  94     \r
  95     @Override\r
  96     public void setLocationDeep(long loc) {\r
  97         if(location == Locations.NO_LOCATION) {\r
  98             location = loc;\r
  99             pattern.setLocationDeep(loc);\r
 100             value.setLocationDeep(loc);\r
 101         }\r
 102     }\r
 103 \r
 104     @Override\r
 105     public void accept(ListQualifierVisitor visitor) {\r
 106         visitor.visit(this);\r
 107     }\r
 108 \r
 109     @Override\r
 110     public void forVariables(VariableProcedure procedure) {\r
 111         value.forVariables(procedure);\r
 112     }\r
 113 \r
 114     @Override\r
 115     public ListQualifier accept(ListQualifierTransformer transformer) {\r
 116         return transformer.transform(this);\r
 117     }\r
 118 }\r