gerrit.simantics Code Review - simantics/platform.git/blob

   1 package org.simantics.scl.compiler.elaboration.expressions;
   2
   3 import java.util.ArrayList;
   4 import java.util.Collections;
   5 import java.util.Comparator;
   6
   7 import org.simantics.scl.compiler.elaboration.contexts.TranslationContext;
   8 import org.simantics.scl.compiler.elaboration.contexts.TypingContext;
   9 import org.simantics.scl.compiler.elaboration.query.Query;
  10 import org.simantics.scl.compiler.elaboration.rules.TransformationRule;
  11 import org.simantics.scl.compiler.errors.Locations;
  12 import org.simantics.scl.compiler.internal.elaboration.transformations.TransformationBuilder;
  13 import org.simantics.scl.compiler.top.SCLCompilerConfiguration;
  14 import org.simantics.scl.compiler.types.Type;
  15 import org.simantics.scl.compiler.types.Types;
  16 import org.simantics.scl.compiler.types.exceptions.MatchException;
  17
  18 import gnu.trove.map.hash.TObjectIntHashMap;
  19 import gnu.trove.set.hash.THashSet;
  20 import gnu.trove.set.hash.TIntHashSet;
  21
  22 public class ETransformation extends SimplifiableExpression {
  23     public static final Object TRANSFORMATION_RULES_TYPECHECKED = new Object();
  24
  25     public final String name;
  26     public Query seed;
  27
  28     public ETransformation(String name, Query seed) {
  29         this.name = name;
  30         this.seed = seed;
  31     }
  32
  33     @Override
  34     public void collectVars(TObjectIntHashMap<Variable> allVars,
  35             TIntHashSet vars) {
  36         seed.collectVars(allVars, vars);
  37     }
  38
  39     @Override
  40     protected void updateType() throws MatchException {
  41         setType(Types.UNIT);
  42     }
  43
  44     @Override
  45     public void collectFreeVariables(THashSet<Variable> vars) {
  46         seed.collectFreeVariables(vars);
  47     }
  48
  49     @Override
  50     public Expression inferType(TypingContext context) {
  51         context.declareEffect(location, Types.PROC);
  52         seed.checkType(context);
  53         return compile(context);
  54     }
  55
  56     private Expression compile(TypingContext context) {
  57         ArrayList<TransformationRule> rules = new ArrayList<TransformationRule>();
  58         context.getEnvironment().collectRules(rules);
  59         Collections.sort(rules, new Comparator<TransformationRule>() {
  60             @Override
  61             public int compare(TransformationRule o1, TransformationRule o2) {
  62                 return Integer.compare(Locations.beginOf(o1.location), Locations.beginOf(o2.location));
  63             }
  64         });
  65
  66         // Translation
  67         TransformationBuilder tb = new TransformationBuilder(context.getErrorLog(), context);
  68         tb.handleSeed(seed);
  69         for(TransformationRule rule : rules)
  70             if(!rule.isAbstract)
  71                 tb.handleRule(rule);
  72         Expression expression = tb.compileRules();
  73
  74         if(SCLCompilerConfiguration.SHOW_COMPILED_RULES)
  75             System.out.println(expression);
  76         return expression;
  77     }
  78
  79     @Override
  80     public Expression resolve(TranslationContext context) {
  81         seed = seed.resolve(context);
  82         return this;
  83     }
  84
  85     @Override
  86     public void setLocationDeep(long loc) {
  87         if(location == Locations.NO_LOCATION) {
  88             location = loc;
  89             seed.setLocationDeep(loc);
  90         }
  91     }
  92
  93     @Override
  94     public void collectEffects(THashSet<Type> effects) {
  95         effects.add(Types.PROC);
  96         //seed.collectEffects(Query.RW, effects); // FIXME
  97     }
  98
  99     @Override
 100     public void accept(ExpressionVisitor visitor) {
 101         visitor.visit(this);
 102     }
 103
 104     @Override
 105     public Expression accept(ExpressionTransformer transformer) {
 106         return transformer.transform(this);
 107     }
 108
 109 }