bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/compilation/Elaboration.java

   1 package org.simantics.scl.compiler.compilation;
   2
   3 import java.util.ArrayList;
   4 import java.util.Iterator;
   5 import java.util.List;
   6
   7 import org.cojen.classfile.TypeDesc;
   8 import org.simantics.scl.compiler.common.datatypes.Constructor;
   9 import org.simantics.scl.compiler.common.exceptions.InternalCompilerError;
  10 import org.simantics.scl.compiler.common.names.Name;
  11 import org.simantics.scl.compiler.constants.Constant;
  12 import org.simantics.scl.compiler.constants.JavaTypeInstanceConstructor;
  13 import org.simantics.scl.compiler.constants.SCLConstructor;
  14 import org.simantics.scl.compiler.constants.StringConstant;
  15 import org.simantics.scl.compiler.constants.generic.CallJava;
  16 import org.simantics.scl.compiler.constants.generic.ClassRef;
  17 import org.simantics.scl.compiler.constants.generic.ConvertToListFilter;
  18 import org.simantics.scl.compiler.constants.generic.MethodRef;
  19 import org.simantics.scl.compiler.constants.generic.MethodRef.FieldRef;
  20 import org.simantics.scl.compiler.constants.generic.OutputFilter;
  21 import org.simantics.scl.compiler.constants.generic.ParameterStackItem;
  22 import org.simantics.scl.compiler.constants.generic.Pop2OutputFilter;
  23 import org.simantics.scl.compiler.constants.generic.PopOutputFilter;
  24 import org.simantics.scl.compiler.constants.generic.StackItem;
  25 import org.simantics.scl.compiler.constants.generic.ThreadLocalStackItem;
  26 import org.simantics.scl.compiler.constants.singletons.SafeCoerce;
  27 import org.simantics.scl.compiler.elaboration.contexts.TranslationContext;
  28 import org.simantics.scl.compiler.elaboration.contexts.TypeTranslationContext;
  29 import org.simantics.scl.compiler.elaboration.errors.NotPatternException;
  30 import org.simantics.scl.compiler.elaboration.expressions.EApply;
  31 import org.simantics.scl.compiler.elaboration.expressions.EGetConstraint;
  32 import org.simantics.scl.compiler.elaboration.expressions.EIntegerLiteral;
  33 import org.simantics.scl.compiler.elaboration.expressions.EListLiteral;
  34 import org.simantics.scl.compiler.elaboration.expressions.ELiteral;
  35 import org.simantics.scl.compiler.elaboration.expressions.EPreCHRRulesetConstructor;
  36 import org.simantics.scl.compiler.elaboration.expressions.EVar;
  37 import org.simantics.scl.compiler.elaboration.expressions.Expression;
  38 import org.simantics.scl.compiler.elaboration.expressions.Variable;
  39 import org.simantics.scl.compiler.elaboration.expressions.annotations.AnnotationUtils;
  40 import org.simantics.scl.compiler.elaboration.fundeps.Fundep;
  41 import org.simantics.scl.compiler.elaboration.java.JavaMethodDeclaration;
  42 import org.simantics.scl.compiler.elaboration.macros.StandardMacroRule;
  43 import org.simantics.scl.compiler.elaboration.modules.DeprecatedProperty;
  44 import org.simantics.scl.compiler.elaboration.modules.DerivedProperty;
  45 import org.simantics.scl.compiler.elaboration.modules.InlineProperty;
  46 import org.simantics.scl.compiler.elaboration.modules.MethodImplementation;
  47 import org.simantics.scl.compiler.elaboration.modules.PrivateProperty;
  48 import org.simantics.scl.compiler.elaboration.modules.SCLValue;
  49 import org.simantics.scl.compiler.elaboration.modules.TypeAlias;
  50 import org.simantics.scl.compiler.elaboration.modules.TypeClass;
  51 import org.simantics.scl.compiler.elaboration.modules.TypeClassInstance;
  52 import org.simantics.scl.compiler.elaboration.modules.TypeClassMethod;
  53 import org.simantics.scl.compiler.elaboration.modules.TypeDescriptor;
  54 import org.simantics.scl.compiler.elaboration.query.Query;
  55 import org.simantics.scl.compiler.elaboration.query.pre.QPreGuard;
  56 import org.simantics.scl.compiler.elaboration.relations.ConcreteRelation;
  57 import org.simantics.scl.compiler.elaboration.rules.MappingRelation;
  58 import org.simantics.scl.compiler.elaboration.rules.SectionName;
  59 import org.simantics.scl.compiler.elaboration.rules.TransformationRule;
  60 import org.simantics.scl.compiler.environment.AmbiguousNameException;
  61 import org.simantics.scl.compiler.environment.Environment;
  62 import org.simantics.scl.compiler.environment.EnvironmentFactory;
  63 import org.simantics.scl.compiler.environment.Environments;
  64 import org.simantics.scl.compiler.errors.CompilationError;
  65 import org.simantics.scl.compiler.errors.ErrorLog;
  66 import org.simantics.scl.compiler.errors.ErrorSeverity;
  67 import org.simantics.scl.compiler.errors.Locations;
  68 import org.simantics.scl.compiler.internal.codegen.effects.EffectConstructor;
  69 import org.simantics.scl.compiler.internal.codegen.effects.ThreadLocalVariable;
  70 import org.simantics.scl.compiler.internal.codegen.types.JavaReferenceValidator;
  71 import org.simantics.scl.compiler.internal.codegen.types.JavaReferenceValidatorFactory;
  72 import org.simantics.scl.compiler.internal.codegen.types.JavaTypeTranslator;
  73 import org.simantics.scl.compiler.internal.codegen.types.StandardTypeConstructor;
  74 import org.simantics.scl.compiler.internal.codegen.utils.Constants;
  75 import org.simantics.scl.compiler.internal.codegen.utils.JavaNamingPolicy;
  76 import org.simantics.scl.compiler.internal.codegen.utils.MethodBuilderBase;
  77 import org.simantics.scl.compiler.internal.deriving.InstanceDeriver;
  78 import org.simantics.scl.compiler.internal.deriving.InstanceDerivers;
  79 import org.simantics.scl.compiler.internal.elaboration.profiling.BranchPointInjector;
  80 import org.simantics.scl.compiler.internal.elaboration.utils.StronglyConnectedComponents;
  81 import org.simantics.scl.compiler.internal.header.ModuleHeader;
  82 import org.simantics.scl.compiler.internal.parsing.Token;
  83 import org.simantics.scl.compiler.internal.parsing.declarations.ConstructorAst;
  84 import org.simantics.scl.compiler.internal.parsing.declarations.DAnnotationAst;
  85 import org.simantics.scl.compiler.internal.parsing.declarations.DClassAst;
  86 import org.simantics.scl.compiler.internal.parsing.declarations.DDataAst;
  87 import org.simantics.scl.compiler.internal.parsing.declarations.DDerivingInstanceAst;
  88 import org.simantics.scl.compiler.internal.parsing.declarations.DEffectAst;
  89 import org.simantics.scl.compiler.internal.parsing.declarations.DFixityAst;
  90 import org.simantics.scl.compiler.internal.parsing.declarations.DInstanceAst;
  91 import org.simantics.scl.compiler.internal.parsing.declarations.DMappingRelationAst;
  92 import org.simantics.scl.compiler.internal.parsing.declarations.DRelationAst;
  93 import org.simantics.scl.compiler.internal.parsing.declarations.DRuleAst;
  94 import org.simantics.scl.compiler.internal.parsing.declarations.DRulesetAst;
  95 import org.simantics.scl.compiler.internal.parsing.declarations.DTypeAst;
  96 import org.simantics.scl.compiler.internal.parsing.declarations.DValueAst;
  97 import org.simantics.scl.compiler.internal.parsing.declarations.DValueTypeAst;
  98 import org.simantics.scl.compiler.internal.parsing.exceptions.SCLSyntaxErrorException;
  99 import org.simantics.scl.compiler.internal.parsing.parser.SCLTerminals;
 100 import org.simantics.scl.compiler.internal.parsing.translation.ProcessedDClassAst;
 101 import org.simantics.scl.compiler.internal.parsing.translation.ProcessedDInstanceAst;
 102 import org.simantics.scl.compiler.internal.parsing.translation.RelationRepository;
 103 import org.simantics.scl.compiler.internal.parsing.translation.ValueRepository;
 104 import org.simantics.scl.compiler.internal.parsing.types.TypeAst;
 105 import org.simantics.scl.compiler.module.ConcreteModule;
 106 import org.simantics.scl.compiler.module.ImportDeclaration;
 107 import org.simantics.scl.compiler.module.InvalidModulePathException;
 108 import org.simantics.scl.compiler.module.ModuleUtils;
 109 import org.simantics.scl.compiler.module.debug.ModuleDebugInfo;
 110 import org.simantics.scl.compiler.module.repository.ImportFailure;
 111 import org.simantics.scl.compiler.module.repository.ImportFailureException;
 112 import org.simantics.scl.compiler.top.SCLCompilerConfiguration;
 113 import org.simantics.scl.compiler.types.TCon;
 114 import org.simantics.scl.compiler.types.TForAll;
 115 import org.simantics.scl.compiler.types.TFun;
 116 import org.simantics.scl.compiler.types.TPred;
 117 import org.simantics.scl.compiler.types.TVar;
 118 import org.simantics.scl.compiler.types.Type;
 119 import org.simantics.scl.compiler.types.Types;
 120 import org.simantics.scl.compiler.types.kinds.Kind;
 121 import org.simantics.scl.compiler.types.kinds.Kinds;
 122 import org.simantics.scl.compiler.types.util.MultiFunction;
 123 import org.simantics.scl.runtime.profiling.BranchPoint;
 124
 125 import gnu.trove.list.array.TIntArrayList;
 126 import gnu.trove.map.hash.THashMap;
 127 import gnu.trove.map.hash.TObjectIntHashMap;
 128 import gnu.trove.procedure.TObjectObjectProcedure;
 129 import gnu.trove.set.hash.THashSet;
 130 import gnu.trove.set.hash.TIntHashSet;
 131
 132 public class Elaboration {
 133     // inputs
 134     private final CompilationContext compilationContext;
 135     private final ErrorLog errorLog;
 136     private final String moduleName;
 137     private final ModuleHeader moduleHeader;
 138     private final ArrayList<ImportDeclaration> importsAst;
 139     private final JavaReferenceValidatorFactory jrvFactory;
 140     final JavaReferenceValidator<Object, Object, Object, Object> javaReferenceValidator;
 141     private final ValueRepository valueDefinitionsAst;
 142     private final RelationRepository relationDefinitionsAst;
 143
 144     // creates
 145     ConcreteModule module;
 146     Environment importedEnvironment;
 147     ArrayList<SupplementedValueType> supplementedTypeAnnotations = new ArrayList<SupplementedValueType>();
 148
 149     JavaTypeTranslator javaTypeTranslator;
 150     ArrayList<StandardTypeConstructor> dataTypes = new ArrayList<StandardTypeConstructor>();
 151     THashMap<String, ClassRef> classRefs = new THashMap<String, ClassRef>();
 152     THashMap<String, BranchPoint[]> branchPoints;
 153
 154     THashMap<String, EVar> exportMap = null;
 155
 156     public Elaboration(CompilationContext compilationContext, CompilationTimer timer, EnvironmentFactory localEnvironmentFactory,
 157             String moduleName, ModuleHeader moduleHeader, ArrayList<ImportDeclaration> importsAst,
 158             JavaReferenceValidatorFactory jrvFactory,
 159             ValueRepository valueDefinitionsAst,
 160             RelationRepository relationDefinitionsAst) {
 161         this.compilationContext = compilationContext;
 162         this.errorLog = compilationContext.errorLog;
 163         this.moduleName = moduleName;
 164         this.moduleHeader = moduleHeader;
 165         if(moduleName != null)
 166             importsAst = processRelativeImports(compilationContext.errorLog, moduleName, importsAst);
 167         this.importsAst = importsAst;
 168         this.jrvFactory = jrvFactory;
 169         this.javaReferenceValidator = moduleHeader == null || moduleHeader.classLoader == null
 170                 ? jrvFactory.getDefaultJavaReferenceValidator()
 171                 : jrvFactory.getJavaReferenceValidator(moduleHeader.classLoader);
 172         if(javaReferenceValidator == null)
 173             errorLog.log(moduleHeader.classLoaderLocation, "Didn't find the specified class loader.");
 174         this.valueDefinitionsAst = valueDefinitionsAst;
 175         this.relationDefinitionsAst = relationDefinitionsAst;
 176
 177         module = new ConcreteModule(moduleName);
 178         compilationContext.module = module;
 179         compilationContext.moduleRepository = localEnvironmentFactory.getModuleRepository();
 180         if(moduleHeader != null) {
 181             if(moduleHeader.defaultLocalName != null)
 182                 module.setDefaultLocalName(moduleHeader.defaultLocalName);
 183             if(moduleHeader.deprecated != null)
 184                 module.setDeprecation(moduleHeader.deprecated);
 185         }
 186         try {
 187             if(timer != null)
 188                 timer.suspendTimer();
 189             importedEnvironment = localEnvironmentFactory.createEnvironment(
 190                     compilationContext,
 191                     importsAst.toArray(new ImportDeclaration[importsAst.size()]));
 192             if(timer != null)
 193                 timer.continueTimer();
 194             compilationContext.environment = new EnvironmentOfModule(importedEnvironment, module);
 195         } catch (ImportFailureException e) {
 196             for(ImportFailure failure : e.failures)
 197                 errorLog.log(new CompilationError(failure.location, failure.toString(), ErrorSeverity.IMPORT_ERROR));
 198             return;
 199         }
 200         for(ImportDeclaration importAst : importsAst)
 201             this.module.addDependency(new ImportDeclaration(
 202                     importAst.moduleName,
 203                     importAst.reexport ? importAst.localName : null,
 204                     false,
 205                     importAst.spec));
 206         localEnvironmentFactory.addBuiltinDependencies(module);
 207         compilationContext.namingPolicy = new JavaNamingPolicy(moduleName);
 208     }
 209
 210     public static ArrayList<ImportDeclaration> processRelativeImports(ErrorLog errorLog, String moduleName, ArrayList<ImportDeclaration> relativeImports) {
 211         ArrayList<ImportDeclaration> absoluteImports = new ArrayList<ImportDeclaration>(relativeImports.size());
 212         for(ImportDeclaration relativeImport : relativeImports) {
 213             if(relativeImport.moduleName.startsWith(".")) {
 214                                 try {
 215                                         String absoluteModuleName = ModuleUtils.resolveAbsolutePath(moduleName, relativeImport.moduleName);
 216                     ImportDeclaration absoluteImport = new ImportDeclaration(
 217                             relativeImport.location,
 218                             absoluteModuleName, relativeImport.localName,
 219                             relativeImport.reexport, relativeImport.spec);
 220                     absoluteImports.add(absoluteImport);
 221                                 } catch (InvalidModulePathException e) {
 222                                     if(errorLog != null)
 223                                         errorLog.log(relativeImport.location, e.getMessage());
 224                                 }
 225             }
 226             else
 227                 absoluteImports.add(relativeImport);
 228         }
 229         return absoluteImports;
 230     }
 231
 232     public void addTypesToEnvironment(
 233             ArrayList<DDataAst> dataTypesAst,
 234             ArrayList<DTypeAst> typeAliasesAst,
 235             ArrayList<DEffectAst> effectsAst,
 236             ArrayList<DRulesetAst> rulesetsAst) {
 237         for(DDataAst dataType : dataTypesAst) {
 238             dataType.parameterKinds = new Kind[dataType.parameters.length];
 239             Kind constructorKind = Kinds.STAR;
 240             for(int i=dataType.parameters.length-1;i>=0;--i) {
 241                 Kind kind = Kinds.metaVar();
 242                 dataType.parameterKinds[i] = kind;
 243                 constructorKind = Kinds.arrow(kind, constructorKind);
 244             }
 245
 246             StandardTypeConstructor typeConstructor = new StandardTypeConstructor(
 247                     Types.con(moduleName, dataType.name), constructorKind);
 248
 249             NameExistenceChecks.checkIfTypeExists(errorLog,
 250                     dataType.location, importedEnvironment, dataType.name);
 251             addTypeDescriptor(dataType.location, dataType.name, typeConstructor);
 252             dataType.typeConstructor = typeConstructor;
 253         }
 254
 255         for(DTypeAst typeAlias : typeAliasesAst) {
 256             TypeAlias alias = new TypeAlias(Types.con(moduleName, typeAlias.name), typeAlias.parameters.length);
 257             NameExistenceChecks.checkIfTypeExists(errorLog,
 258                     typeAlias.location, importedEnvironment, typeAlias.name);
 259             addTypeDescriptor(typeAlias.location, typeAlias.name, alias);
 260         }
 261
 262         for(DEffectAst effect : effectsAst) {
 263             EffectConstructor effectConstructor = new EffectConstructor(Types.con(moduleName, effect.name));
 264             effectConstructor.addThreadLocalVariable(
 265                     new ThreadLocalVariable(
 266                             effect.variableName,
 267                             TypeDesc.forClass(effect.threadLocalType)
 268                             ));
 269             if(module.addEffectConstructor(effect.name, effectConstructor))
 270                 errorLog.log(effect.location, "Effect "+effect.name+" has already been defined in this module.");
 271         }
 272         for(DRulesetAst ruleset : rulesetsAst) {
 273             ruleset.type = Types.con(moduleName, ruleset.name);
 274             ruleset.className = compilationContext.namingPolicy.getDataTypeClassName(ruleset.name);
 275             StandardTypeConstructor typeConstructor = new StandardTypeConstructor(ruleset.type, Kinds.STAR,
 276                     TypeDesc.forClass(ruleset.className), ruleset.documentation == null ? null : ruleset.documentation.documentation);
 277             typeConstructor.external = true;
 278             addTypeDescriptor(ruleset.location, ruleset.name, typeConstructor);
 279         }
 280         javaTypeTranslator = new JavaTypeTranslator(compilationContext.environment);
 281         compilationContext.javaTypeTranslator = javaTypeTranslator;
 282     }
 283
 284     private void addTypeDescriptor(long location, String name, TypeDescriptor typeDescriptor) {
 285         if(module.addTypeDescriptor(name, typeDescriptor))
 286             errorLog.log(location, "Type "+name+" has already been defined in this module.");
 287     }
 288
 289     private static final int[] EMPTY_INT_ARRAY = new int[0];
 290
 291     public void processTypeAliases(ArrayList<DTypeAst> typeAliasesAst) {
 292         TObjectIntHashMap<String> typeAliasMap = new TObjectIntHashMap<String>();
 293         for(int i=0;i<typeAliasesAst.size();++i)
 294             typeAliasMap.put(typeAliasesAst.get(i).name, i);
 295         TIntHashSet tempIntSet = new TIntHashSet();
 296         ArrayList<DTypeAst> orderedTypeAliases = new ArrayList<DTypeAst>(typeAliasesAst.size());
 297         //for(int i=0;i<typeAliasesAst.size();++i)
 298         //    System.out.println(i + "# " + typeAliasesAst.get(i).name);
 299         new StronglyConnectedComponents(typeAliasesAst.size()) {
 300             @Override
 301             protected int[] findDependencies(int u) {
 302                 typeAliasesAst.get(u).type.collectReferences(typeAliasMap, tempIntSet);
 303                 if(tempIntSet.isEmpty())
 304                     return EMPTY_INT_ARRAY;
 305                 if(tempIntSet.contains(u)) {
 306                     errorLog.log(typeAliasesAst.get(u).location, "Type alias has a self reference.");
 307                     tempIntSet.remove(u);
 308                 }
 309                 int[] result = tempIntSet.toArray();
 310                 tempIntSet.clear();
 311                 //System.out.println(u + " -> " + Arrays.toString(result));
 312                 return result;
 313             }
 314             @Override
 315             protected void reportComponent(int[] component) {
 316                 //System.out.println("component: " + Arrays.toString(component));
 317                 if(component.length > 1) {
 318                     StringBuilder b = new StringBuilder();
 319                     b.append("Recursively defined type alias (");
 320                     long minLocation = typeAliasesAst.get(component[0]).location;
 321                     boolean first = true;
 322                     for(int u : component) {
 323                         DTypeAst typeAlias = typeAliasesAst.get(u);
 324                         if(first)
 325                             first = false;
 326                         else
 327                             b.append(", ");
 328                         b.append(typeAlias.name);
 329                         if(Locations.beginOf(typeAlias.location) < Locations.beginOf(minLocation))
 330                             minLocation = typeAlias.location;
 331                     }
 332                     b.append(").");
 333                     errorLog.log(minLocation, b.toString());
 334                 }
 335                 else
 336                     orderedTypeAliases.add(typeAliasesAst.get(component[0]));
 337             }
 338         }.findComponents();
 339
 340         if(errorLog.hasNoErrors()) {
 341             for(DTypeAst typeAlias : orderedTypeAliases) {
 342                 TypeAlias alias = (TypeAlias)module.getTypeDescriptor(typeAlias.name);
 343                 TypeTranslationContext context = createTypeTranslationContext();
 344                 for(int i=0;i<typeAlias.parameters.length;++i)
 345                     context.pushTypeVar(typeAlias.parameters[i]);
 346                 alias.body = typeAlias.type.toType(context, Kinds.metaVar());
 347                 for(int i=0;i<typeAlias.parameters.length;++i)
 348                     alias.parameters[i] = context.popTypeVar(typeAlias.parameters[i], null);
 349             }
 350         }
 351     }
 352
 353     public void processDataTypes(ArrayList<DDataAst> dataTypesAst) {
 354         ArrayList<Runnable> fieldAccessorGenerators = new ArrayList<Runnable>();
 355         for(DDataAst dataTypeAst : dataTypesAst) {
 356             TypeTranslationContext context = createTypeTranslationContext();
 357             TVar[] typeParameters = new TVar[dataTypeAst.parameters.length];
 358             for(int i=0;i<dataTypeAst.parameters.length;++i)
 359                 typeParameters[i] = context.addTypeVar(dataTypeAst.parameters[i]);
 360             Constructor[] constructors = new Constructor[dataTypeAst.constructors.length];
 361             String className = null;
 362             boolean external = false;
 363             for(DAnnotationAst annotation : dataTypeAst.getAnnotations()) {
 364                 if(annotation.id.text.equals("@JavaType")) {
 365                     if(annotation.parameters.length != 1 ||
 366                             !(annotation.parameters[0] instanceof ELiteral) ||
 367                             !(((ELiteral)annotation.parameters[0]).getValue() instanceof StringConstant))
 368                         errorLog.log(annotation.location, "Invalid parameters. Expected @JavaType \"className\".");
 369                     else {
 370                         className = ((StringConstant)((ELiteral)annotation.parameters[0]).getValue()).getValue().replace('.', '/');
 371                         external = true;
 372                         break;
 373                     }
 374                 }
 375             }
 376
 377             boolean trivialDataType = dataTypeAst.constructors.length == 1 &&
 378                     dataTypeAst.constructors[0].parameters.length == 1;
 379             if(className == null && !trivialDataType)
 380                 className = compilationContext.namingPolicy.getDataTypeClassName(dataTypeAst.name);
 381
 382             StandardTypeConstructor dataType = dataTypeAst.typeConstructor;
 383
 384             dataType.setType(Types.con(moduleName, dataTypeAst.name), typeParameters);
 385             dataType.setConstructors(constructors);
 386             if(!trivialDataType)
 387                 dataType.setTypeDesc(TypeDesc.forClass(className));
 388             if(!external || dataTypeAst.constructors.length > 0) {
 389                 dataType.isOpen = false;
 390             }
 391             dataType.external = external;
 392             dataTypes.add(dataType);
 393             for(int j=0;j<constructors.length;++j) {
 394                 ConstructorAst constructor = dataTypeAst.constructors[j];
 395                 String name = constructor.name.text;
 396                 Type[] parameterTypes = new Type[constructor.parameters.length];
 397                 for(int i=constructor.parameters.length-1;i>=0;--i)
 398                     parameterTypes[i] = context.toType(constructor.parameters[i]);
 399                 String javaName = constructors.length == 1 ? className
 400                         : compilationContext.namingPolicy.getConstructorClassName(name);
 401                 String[] fieldNames = null;
 402                 for(DAnnotationAst annotation : constructor.annotations)
 403                     if(annotation.id.text.equals("@JavaType")) {
 404                         try {
 405                             javaName = ((StringConstant)((ELiteral)annotation.parameters[0])
 406                                     .getValue()).getValue();
 407                         } catch(Exception e) {
 408                             errorLog.log(annotation.parameters[0].location, "Invalid annotation parameter.");
 409                         }
 410                     }
 411                     else if(annotation.id.text.equals("@FieldNames")) {
 412                         try {
 413                             EListLiteral literal = (EListLiteral)annotation.parameters[0];
 414                             fieldNames = new String[literal.getComponents().length];
 415                             for(int i=0;i<fieldNames.length;++i) {
 416                                 Expression component = literal.getComponents()[i];
 417                                 if(component instanceof EVar)
 418                                     fieldNames[i] = ((EVar)component).name;
 419                                 else if(component instanceof ELiteral)
 420                                     fieldNames[i] = ((StringConstant)((ELiteral)component).getValue()).getValue();
 421                             }
 422                         } catch(Exception e) {
 423                             errorLog.log(annotation.parameters[0].location, "Invalid annotation parameter.");
 424                             fieldNames = null;
 425                         }
 426                     }
 427
 428                 constructors[j] = new Constructor(constructor.location, dataType,
 429                         Name.create(moduleName, name),
 430                         parameterTypes, javaName);
 431                 constructors[j].fieldNames = fieldNames;
 432                 constructors[j].recordFieldNames = constructor.fieldNames;
 433             }
 434             if(constructors.length == 1) {
 435                 Constructor constructor = constructors[0];
 436                 if(constructor.recordFieldNames != null) {
 437                     fieldAccessorGenerators.add(new Runnable() {
 438                         @Override
 439                         public void run() {
 440                             Type in = Types.apply(dataType.name, dataType.parameters);
 441                             for(int i=0;i<constructor.recordFieldNames.length;++i) {
 442                                 Type out = constructor.parameterTypes[i];
 443                                 Constant accessor;
 444                                 if(trivialDataType)
 445                                     accessor = new SafeCoerce(dataType.parameters, in, out);
 446                                 else
 447                                     accessor = new CallJava(dataType.parameters, Types.NO_EFFECTS, out,
 448                                             new Type[] {in}, new StackItem[] {new ParameterStackItem(0, in)},
 449                                             new FieldRef(constructor.javaName, constructor.fieldNames != null ? constructor.fieldNames[i] : "c" + i,
 450                                                     javaTypeTranslator.toTypeDesc(out)),
 451                                             null);
 452                                 module.addFieldAccessor(constructor.recordFieldNames[i], accessor);
 453                             }
 454                         }
 455                     });
 456                 }
 457             }
 458         }
 459
 460         for(Runnable fieldAccessorGenerator : fieldAccessorGenerators)
 461             fieldAccessorGenerator.run();
 462     }
 463
 464     public void processTypeClasses(ArrayList<ProcessedDClassAst> typeClassesAst) {
 465         for(ProcessedDClassAst pClassAst : typeClassesAst) {
 466             DClassAst classAst = pClassAst.orig;
 467
 468             if(module.getTypeClass(classAst.name) != null) {
 469                 errorLog.log(classAst.location, "Class "+classAst.name+" has already been defined in this module.");
 470                 continue;
 471             }
 472
 473             TypeTranslationContext context = createTypeTranslationContext();
 474
 475             TPred[] classContext = new TPred[classAst.context.length];
 476             for(int i=0;i<classContext.length;++i)
 477                 classContext[i] = context.toTFuncApply(classAst.context[i]);
 478
 479             TVar[] parameters = new TVar[classAst.parameters.length];
 480
 481             if(classAst.name.equals("Functor") || classAst.name.equals("Monad")) {
 482                 // FIXME hack
 483                 parameters[0] = context.resolveTypeVariable(pClassAst.orig.location, classAst.parameters[0], Kinds.STAR_TO_STAR);
 484             }
 485             else {
 486                 for(int i=0;i<parameters.length;++i)
 487                     parameters[i] = context.resolveTypeVariable(pClassAst.orig.location, classAst.parameters[i], Kinds.metaVar());
 488             }
 489
 490             TCon con = Types.con(moduleName, classAst.name);
 491             TypeClass typeClass = new TypeClass(classAst.location,
 492                     classContext,
 493                     con,
 494                     compilationContext.namingPolicy.getTypeClassInterfaceName(con),
 495                     parameters,
 496                     Fundep.mapFundeps(classAst.parameters, classAst.fundeps));
 497
 498             THashMap<String, TypeClassMethod> methods = typeClass.methods;
 499             for(DValueTypeAst methodDecl : pClassAst.typeDeclarations) {
 500                 try {
 501                     Type type;
 502                     try {
 503                         type = context.toType(methodDecl.type);
 504                     } catch(SCLSyntaxErrorException e) {
 505                         errorLog.log(e.location, e.getMessage());
 506                         continue;
 507                     }
 508                     for(EVar name : methodDecl.names) {
 509                         typeClass.methodNames.add(name.name);
 510                         methods.put(name.name,
 511                                 new TypeClassMethod(typeClass, name.name,
 512                                         compilationContext.namingPolicy.getMethodName(name.name),
 513                                         type, Types.getArity(type),
 514                                         name.location)
 515                                 );
 516                     }
 517                 } catch(RuntimeException e) {
 518                     errorLog.setExceptionPosition(methodDecl.location);
 519                     throw e;
 520                 }
 521             }
 522
 523             for(String methodName : pClassAst.defaultImplementations.getValueNames()) {
 524                 String fullName = "_" + classAst.name + "_default_" + methodName;
 525                 ArrayList<DValueAst> defs = pClassAst.defaultImplementations.getDefinition(methodName);
 526
 527                 TypeClassMethod method = typeClass.methods.get(methodName);
 528                 if(method == null) {
 529                     errorLog.log(defs.get(0).location, "Method " + methodName + " is not defined in this class.");
 530                     continue;
 531                 }
 532                 method.setDefaultImplementation(Name.create(moduleName, fullName));
 533
 534                 valueDefinitionsAst.addDefinitions(fullName, defs);
 535                 supplementedTypeAnnotations.add(new SupplementedValueType(defs.get(0).location, fullName, method.getType()));
 536                 valueDefinitionsAst.setDerived(fullName);
 537             }
 538
 539             module.addTypeClass(classAst.name, typeClass);
 540         }
 541     }
 542
 543     private TypeTranslationContext createTypeTranslationContext() {
 544         return new TypeTranslationContext(compilationContext);
 545     }
 546
 547     public void processDerivingInstances(ArrayList<DDerivingInstanceAst> derivingInstancesAst,
 548             ArrayList<ProcessedDInstanceAst> instancesAst) {
 549         for(DDerivingInstanceAst derivingInstance : derivingInstancesAst) {
 550             String name = derivingInstance.name.name;
 551             TCon con;
 552             try {
 553                 con = Environments.getTypeClassName(compilationContext.environment, name);
 554             } catch (AmbiguousNameException e) {
 555                 errorLog.log(derivingInstance.name.location, e.getMessage());
 556                 continue;
 557             }
 558             if(con == null) {
 559                 errorLog.log(derivingInstance.name.location, "Couldn't resolve class " + name + ".");
 560                 continue;
 561             }
 562             InstanceDeriver deriver = InstanceDerivers.get(con);
 563             if(deriver == null)
 564                 errorLog.log(derivingInstance.location, "Doesn't know how to derive " + name + ".");
 565             else
 566                 deriver.derive(errorLog, compilationContext.environment, instancesAst, derivingInstance);
 567         }
 568     }
 569
 570     public void processInstances(ArrayList<ProcessedDInstanceAst> instancesAst) {
 571         THashSet<TPred> instanceClashCheckSet = new THashSet<TPred>();
 572         for(ProcessedDInstanceAst pInstanceAst : instancesAst) {
 573             DInstanceAst instanceAst = pInstanceAst.orig;
 574             try {
 575                 TypeTranslationContext context = createTypeTranslationContext();
 576
 577                 String name = instanceAst.name.name;
 578                 TCon typeClassCon;
 579                 try {
 580                     typeClassCon = Environments.getTypeClassName(compilationContext.environment, name);
 581                 } catch (AmbiguousNameException e) {
 582                     errorLog.log(instanceAst.name.location, e.getMessage());
 583                     continue;
 584                 }
 585                 if(typeClassCon == null) {
 586                     errorLog.log(instanceAst.name.location, "Couldn't resolve class " + name + ".");
 587                     continue;
 588                 }
 589                 TypeClass typeClass = compilationContext.environment.getTypeClass(typeClassCon);
 590                 pInstanceAst.typeClass = typeClass;
 591
 592                 if(instanceAst.types.length != typeClass.parameters.length) {
 593                     errorLog.log(instanceAst.location, "Wrong number of parameters to type class " + typeClassCon.name + ".");
 594                     continue;
 595                 }
 596                 Type[] parameters = new Type[instanceAst.types.length];
 597                 for(int i=0;i<parameters.length;++i)
 598                     parameters[i] = context.toType(instanceAst.types[i], typeClass.parameters[i].getKind() /* FIXME */);
 599                 TPred instance = Types.pred(typeClassCon, parameters);
 600
 601                 if(!instanceClashCheckSet.add(instance)) {
 602                     errorLog.log(instanceAst.location, "Duplicate definition of the instance " + instance + ".");
 603                     continue;
 604                 }
 605
 606                 TPred[] instanceContext = new TPred[instanceAst.context.length];
 607                 for(int i=0;i<instanceContext.length;++i)
 608                     instanceContext[i] = context.toTFuncApply(instanceAst.context[i]);
 609
 610                 String javaName = compilationContext.namingPolicy.getInstanceClassName(instance);
 611                 String instancePrefix = instance.toName() + "$";
 612
 613                 ValueRepository valueDefs = pInstanceAst.valueDefs;
 614
 615                 THashMap<String, MethodImplementation> methodImplementations =
 616                         new THashMap<String, MethodImplementation>();
 617                 for(String valueName : valueDefs.getValueNames()) {
 618                     String fullName = instancePrefix + valueName;
 619                     long loc = valueDefs.getDefinition(valueName).get(0).location;
 620                     valueDefinitionsAst.addFrom(valueDefs, valueName, fullName);
 621                     valueDefinitionsAst.setDerived(fullName);
 622                     /*valueDefinitionsAst.addAnnotation(fullName, new DAnnotationAst(new EVar("@private"),
 623                             Collections.<Expression>emptyList()));*/
 624                     TypeClassMethod method = typeClass.methods.get(valueName);
 625                     if(method == null) {
 626                         errorLog.log(loc, "Method " + valueName + " is not defined in the type class " + typeClass.name.name + ".");
 627                         continue;
 628                     }
 629                     Type type = method.getBaseType().replace(typeClass.parameters, parameters);
 630                     for(int i=instanceContext.length-1;i>=0;--i)
 631                         type = Types.constrained(instanceContext[i], type);
 632                     //System.out.println(valueName + " :: " + type);
 633                     supplementedTypeAnnotations.add(
 634                             new SupplementedValueType(loc, fullName, type));
 635                     methodImplementations.put(valueName,
 636                             new MethodImplementation(Name.create(moduleName, fullName), false));
 637                 }
 638
 639                 // Are all necessary methods defined
 640                 for(String methodName : typeClass.methods.keySet())
 641                     if(!methodImplementations.containsKey(methodName)) {
 642                         Name defaultImplementation = typeClass.methods.get(methodName).getDefaultImplementation();
 643                         if(defaultImplementation == null)
 644                             errorLog.log(instanceAst.location, "Method " + methodName + " is not defined.");
 645                         else
 646                             methodImplementations.put(methodName,
 647                                     new MethodImplementation(defaultImplementation, true));
 648                     }
 649
 650                 JavaTypeInstanceConstructor generator = new JavaTypeInstanceConstructor(javaName, instance, instanceContext);
 651                 if(instanceContext.length == 0)
 652                     generator.setHasStaticInstance(true);
 653
 654                 TypeClassInstance typeClassInstance =
 655                         new TypeClassInstance(instanceAst.location, typeClass, generator,
 656                                 generator.getTypeParameters(),
 657                                 instanceContext, instance, methodImplementations,
 658                                 javaName);
 659
 660                 generator.setInstance(typeClassInstance);
 661
 662                 module.addTypeClassInstance(typeClassCon, typeClassInstance);
 663             } catch(RuntimeException e) {
 664                 errorLog.setExceptionPosition(instanceAst.location);
 665                 throw e;
 666             }
 667         }
 668
 669         // Generate superclass functions
 670         for(ArrayList<TypeClassInstance> instanceArray : module.getTypeInstances().values())
 671             for(TypeClassInstance instance : instanceArray) {
 672                 try {
 673                     TypeClass typeClass = instance.typeClass;
 674                     int superCount = typeClass.context.length;
 675
 676                     instance.superExpressions = new SCLValue[superCount];
 677                     for(int i=0;i<superCount;++i) {
 678                         TPred type = (TPred)typeClass.context[i]
 679                                 .replace(typeClass.parameters, instance.instance.parameters);
 680                         SCLValue value = new SCLValue(Name.create(moduleName,
 681                                 instance.javaName.substring(instance.javaName.indexOf('$')+1) + "_super" + i));
 682                         //value.addProperty(PrivateProperty.INSTANCE);
 683                         module.addValue(value);
 684                         Expression expression = new EGetConstraint(instance.location, type);
 685                         value.setExpression(expression);
 686                         value.setType(Types.forAll(instance.generatorParameters, Types.constrained(instance.context, type)));
 687                         value.getProperties().add(new InlineProperty(instance.context.length, 0xffffffff));
 688                         //TypeUnparsingContext tuc = new TypeUnparsingContext();
 689                         // TODO error handling
 690                         instance.superExpressions[i] = value;
 691                     }
 692                 } catch(RuntimeException e) {
 693                     errorLog.setExceptionPosition(instance.getLocation());
 694                     throw e;
 695                 }
 696             }
 697     }
 698
 699     public void processJavaMethods(ArrayList<JavaMethodDeclaration> javaMethodDeclarations) {
 700         for(JavaMethodDeclaration javaMethod : javaMethodDeclarations) {
 701             String name = javaMethod.methodName.name;
 702             String javaName = name;
 703             ArrayList<DAnnotationAst> annotations =
 704                     valueDefinitionsAst.getAnnotations(name);
 705             boolean isPrivate = false;
 706             if(annotations != null) {
 707                 for(DAnnotationAst annotation : annotations)
 708                     if(annotation.id.text.equals("@JavaName")) {
 709                         String temp = AnnotationUtils.processStringAnnotation(errorLog, annotation);
 710                         if(temp != null)
 711                             javaName = temp;
 712                     }
 713                     else if(annotation.id.text.equals("@private")) {
 714                         AnnotationUtils.processTagAnnotation(errorLog, annotation);
 715                         isPrivate = true;
 716                     }
 717             }
 718             if(exportMap != null)
 719                 isPrivate = exportMap.remove(name) == null;
 720
 721             Type type = createTypeTranslationContext().toType(javaMethod.type);
 722
 723             CallJava callJava = resolveMethod(
 724                     javaMethod.location,
 725                     javaMethod.className,
 726                     javaName,
 727                     type);
 728             if(callJava != null) {
 729                 NameExistenceChecks.checkIfValueExists(errorLog, javaMethod.location,
 730                         importedEnvironment, module, name);
 731                 SCLValue value = module.addValue(name, callJava);
 732                 value.definitionLocation = javaMethod.methodName.location;
 733                 if(isPrivate)
 734                     value.addProperty(PrivateProperty.INSTANCE);
 735             }
 736         }
 737     }
 738
 739     public void processRulesets(ArrayList<DRulesetAst> rulesetsAst) {
 740         for(DRulesetAst ruleset : rulesetsAst) {
 741             String constructorName = "create" + ruleset.name;
 742             supplementedTypeAnnotations.add(new SupplementedValueType(ruleset.location, constructorName, Types.functionE(Types.PUNIT, Types.PROC, ruleset.type)));
 743             try {
 744                 valueDefinitionsAst.add(new DValueAst(new EVar(constructorName), new EPreCHRRulesetConstructor(ruleset)));
 745             } catch (NotPatternException e) {
 746                 throw new InternalCompilerError(ruleset.location, e);
 747             }
 748         }
 749     }
 750
 751     /**
 752      * Convert a java class method into a {@link CallJava} instance.
 753      * Compilation errors are logged for failures in finding the named class or in accessing the method.
 754      * The return value for errors is {@code null}.
 755      *
 756      * @param loc  SCL source location
 757      * @param className  Name of the class
 758      * @param methodName  Name of the method
 759      * @param type  The expected SCL type of the method
 760      * @return  A new JavaCall instance, or null if the given method can not be instantiated.
 761      */
 762     private CallJava resolveMethod(long loc,
 763             String className, String methodName, Type type) {
 764         // Resolve class
 765         ClassRef classRef = classRefs.get(className);
 766         if(classRef == null) {
 767             if(classRefs.containsKey(className))
 768                 return null;
 769             classRef = javaReferenceValidator.getClassRef(className);
 770             classRefs.put(className, classRef);
 771             if(classRef == null) {
 772                 errorLog.log(loc, "Didn't find class " + className + ".");
 773                 return null;
 774             }
 775             if(!javaReferenceValidator.isPublic(classRef.getClass())) {
 776                 errorLog.log(loc, "Class " + className + " is not public.");
 777                 return null;
 778             }
 779
 780         }
 781
 782         // Resolve method
 783         List<MethodRef> methodRefs = classRef.getMethodRefs(methodName);
 784         if(methodRefs.isEmpty()) {
 785             errorLog.log(loc, "Didn't find any public method or field with name '" + methodName + "' from class " + className + ".");
 786             return null;
 787         }
 788
 789         ArrayList<CallJava> candidates = new ArrayList<CallJava>(2);
 790         for(MethodRef methodRef : methodRefs) {
 791             CallJava candidate = matchType(methodRef, type);
 792             if(candidate != null)
 793                 candidates.add(candidate);
 794         }
 795
 796         if(candidates.isEmpty()) {
 797             StringBuilder b = new StringBuilder();
 798             b.append("Didn't find any public method or field matching the type " + type + ". The following methods and fields were tried:");
 799             for(MethodRef methodRef : methodRefs) {
 800                 b.append("\n    ");
 801                 b.append(methodRef);
 802             }
 803             b.append("\nbut expected something like:");
 804             {
 805                 MultiFunction mFun = Types.matchFunction(type);
 806                 b.append("\n    public static ");
 807                 b.append(javaTypeTranslator.toTypeDesc(mFun.returnType).getFullName()).append(' ').append(methodName).append('(');
 808                 boolean first = true;
 809                 for(Type parameter : mFun.parameterTypes) {
 810                     if(first)
 811                         first = false;
 812                     else
 813                         b.append(", ");
 814                     b.append(javaTypeTranslator.toTypeDesc(parameter).getFullName());
 815                 }
 816                 b.append(')');
 817             }
 818             errorLog.log(loc, b.toString());
 819             return null;
 820         }
 821         else if(candidates.size() == 1)
 822             return candidates.get(0);
 823         else {
 824             // Try to find the best match
 825             ArrayList<CallJava> bestCandidates = new ArrayList<CallJava>(candidates.size());
 826             loop: for(CallJava candidate : candidates) {
 827                 Iterator<CallJava> it = bestCandidates.iterator();
 828                 while(it.hasNext()) {
 829                     CallJava b = it.next();
 830                     switch(candidate.compareTo(javaReferenceValidator, b)) {
 831                     case CallJava.LESS:
 832                     case CallJava.EQUAL:
 833                         continue loop;
 834                     case CallJava.GREATER:
 835                         it.remove();
 836                         break;
 837                     case CallJava.INCOMPARABLE:
 838                         break;
 839                     }
 840                 }
 841                 bestCandidates.add(candidate);
 842             }
 843
 844             if(bestCandidates.size() == 1) {
 845                 // System.out.println("Choose: " + bestCandidates.get(0).getMethodRef());
 846                 return bestCandidates.get(0);
 847             }
 848             else {
 849                 StringBuilder b = new StringBuilder();
 850                 b.append("Found more than one incomparable public methods the type " + type + ":");
 851                 for(CallJava callJava : bestCandidates) {
 852                     b.append("\n    ");
 853                     b.append(callJava.getMethodRef());
 854                 }
 855                 errorLog.log(loc, b.toString());
 856                 return null;
 857             }
 858         }
 859     }
 860
 861     private CallJava matchType(MethodRef methodRef, Type type) {
 862         //System.out.println("-----------------------------------------------------");
 863         //System.out.println("method: " + methodRef);
 864         //System.out.println("type: " + type);
 865
 866         type = Types.canonical(type);
 867         while(type instanceof TForAll)
 868             type = Types.canonical(((TForAll)type).type);
 869
 870         TypeDesc[] expectedParameterTypes = methodRef.getParameterTypes();
 871
 872         ArrayList<Type> parameterTypes = new ArrayList<Type>();
 873         Type effect = Types.NO_EFFECTS;
 874         Type returnType = type;
 875
 876         StackItem[] stackItems = new StackItem[expectedParameterTypes.length];
 877         TIntArrayList unresolvedItems = new TIntArrayList();
 878
 879         loop:
 880         for(int i=0;i<expectedParameterTypes.length;++i) {
 881             Type parameterType;
 882             TypeDesc providedParameterType;
 883             do {
 884                 if(effect != Types.NO_EFFECTS || !(returnType instanceof TFun)) {
 885                     while(i < expectedParameterTypes.length)
 886                         unresolvedItems.add(i++);
 887                     break loop;
 888                 }
 889                 TFun fun = (TFun)returnType;
 890                 parameterType = Types.canonical(fun.domain);
 891                 parameterTypes.add(parameterType);
 892                 effect = Types.canonical(fun.effect);
 893                 returnType = Types.canonical(fun.range);
 894                 providedParameterType = javaTypeTranslator.toTypeDesc(parameterType);
 895             } while(providedParameterType.equals(TypeDesc.VOID));
 896
 897             while(true) {
 898                 TypeDesc expectedParameterType = expectedParameterTypes[i];
 899                 if(javaReferenceValidator.isAssignableFrom(expectedParameterType,
 900                         providedParameterType)) {
 901                     stackItems[i] = new ParameterStackItem(
 902                             parameterTypes.size()-1,
 903                             parameterType);
 904                     break;
 905                 }
 906                 else
 907                     unresolvedItems.add(i++);
 908                 if(i == expectedParameterTypes.length) {
 909                     parameterTypes.remove(parameterTypes.size()-1);
 910                     returnType = Types.functionE(parameterType, effect, returnType);
 911                     break;
 912                 }
 913             }
 914         }
 915         //System.out.println("returnType: " + returnType);
 916         if(!unresolvedItems.isEmpty()) {
 917             ArrayList<TCon> concreteEffects = new ArrayList<TCon>();
 918             effect.collectConcreteEffects(concreteEffects);
 919
 920             for(TCon eff : concreteEffects) {
 921                 EffectConstructor effC = compilationContext.environment.getEffectConstructor(eff);
 922                 for(ThreadLocalVariable var : effC.getThreadLocalVariables()) {
 923                     for(int i=0;i<unresolvedItems.size();++i) {
 924                         int id = unresolvedItems.get(i);
 925                         if(!expectedParameterTypes[id].equals(TypeDesc.OBJECT) &&
 926                                 javaReferenceValidator.isAssignableFrom(expectedParameterTypes[id], var.type)) {
 927                             stackItems[id] = new ThreadLocalStackItem(var.variableName, var.type);
 928                             unresolvedItems.removeAt(i);
 929                             --i;
 930                         }
 931                     }
 932                 }
 933             }
 934
 935             if(!unresolvedItems.isEmpty())
 936                 return null;
 937             /*System.out.print("Unresolved: ");
 938             boolean first = true;
 939             for(int i=0;i<unresolvedItems.size();++i) {
 940                 if(first)
 941                     first = false;
 942                 else
 943                     System.out.print(", ");
 944                 System.out.print(expectedParameterTypes[unresolvedItems.get(i)]);
 945             }
 946             System.out.println();*/
 947         }
 948         OutputFilter filter = null;
 949         {
 950             TypeDesc providedReturnType = methodRef.getReturnType();
 951             if(!providedReturnType.equals(Constants.FUNCTION)) {
 952                 while(returnType instanceof TFun && effect == Types.NO_EFFECTS) {
 953                     TFun fun = (TFun)returnType;
 954                     Type parameterType = Types.canonical(fun.domain);
 955                     if(!javaTypeTranslator.toTypeDesc(parameterType).equals(TypeDesc.VOID))
 956                         return null;
 957                     parameterTypes.add(parameterType);
 958                     effect = Types.canonical(fun.effect);
 959                     returnType = Types.canonical(fun.range);
 960                 }
 961             }
 962             TypeDesc expectedReturnType =
 963                     javaTypeTranslator.toTypeDesc(returnType);
 964             if(!javaReferenceValidator.isAssignableFrom(expectedReturnType,
 965                     providedReturnType)) {
 966                 if(expectedReturnType.equals(TypeDesc.VOID)) {
 967                     if(providedReturnType.equals(TypeDesc.DOUBLE) || providedReturnType.equals(TypeDesc.LONG))
 968                         filter = Pop2OutputFilter.INSTANCE;
 969                     else
 970                         filter = PopOutputFilter.INSTANCE;
 971                 }
 972                 else if(expectedReturnType.equals(Constants.LIST)
 973                         && providedReturnType.equals(Constants.COLLECTION))
 974                     filter = ConvertToListFilter.INSTANCE;
 975                 else
 976                     return null;
 977             }
 978         }
 979
 980         CallJava result = new CallJava(
 981                 Types.freeVarsArray(type),
 982                 effect,
 983                 returnType,
 984                 parameterTypes.toArray(new Type[parameterTypes.size()]),
 985                 stackItems,
 986                 methodRef,
 987                 filter);
 988         //System.out.println(result.getType());
 989         return result;
 990     }
 991
 992     public void processMappingRelations(ArrayList<DMappingRelationAst> mappingRelationsAst) {
 993         for(DMappingRelationAst mappingRelation : mappingRelationsAst) {
 994             TypeAst[] parameterTypesAst = mappingRelation.parameterTypes;
 995             Type[] parameterTypes = new Type[parameterTypesAst.length];
 996             TypeTranslationContext typeTranslationContext = createTypeTranslationContext();
 997             for(int i=0;i<parameterTypes.length;++i)
 998                 parameterTypes[i] = parameterTypesAst[i].toType(typeTranslationContext, Kinds.STAR);
 999             MappingRelation mRel =
1000                     new MappingRelation(Name.create(moduleName, mappingRelation.name), parameterTypes);
1001             mRel.location = mappingRelation.location;
1002             if(module.addMappingRelation(mRel))
1003                 errorLog.log(mappingRelation.location, "Mapping relation " + mappingRelation.name +
1004                         " has already been defined.");
1005         }
1006     }
1007
1008     THashMap<String, DRuleAst> ruleAstMap = new THashMap<String, DRuleAst>();
1009
1010     public void processRules(ArrayList<DRuleAst> rulesAst) {
1011         // Find implied mapping relations
1012         for(DRuleAst ruleA : rulesAst) {
1013             ArrayList<Query> whereSection = ruleA.getSections().get("where");
1014             if(whereSection != null)
1015                 for(Query query : whereSection) {
1016                     if(!(query instanceof QPreGuard))
1017                         continue;
1018                     QPreGuard guard = (QPreGuard)query;
1019                     if(!(guard.guard instanceof EApply))
1020                         continue;
1021                     EApply apply = (EApply)guard.guard;
1022                     if(!(apply.getFunction() instanceof EVar))
1023                         continue;
1024
1025                     String name = ((EVar)apply.getFunction()).name;
1026                     if(module.getMappingRelation(name) != null)
1027                         continue;
1028
1029                     int arity = apply.getParameters().length;
1030                     Type[] parameterTypes = new Type[arity];
1031                     for(int i=0;i<arity;++i)
1032                         parameterTypes[i] = Types.metaVar(Kinds.STAR);
1033                     MappingRelation mRel =
1034                             new MappingRelation(Name.create(moduleName, name), parameterTypes);
1035                     mRel.location = query.location;
1036                     module.addMappingRelation(mRel);
1037                 }
1038             if(ruleAstMap.put(ruleA.name, ruleA) != null)
1039                 errorLog.log(ruleA.location, "Rule " + ruleA.name +
1040                         " has already been defined.");
1041         }
1042
1043         //
1044         for(String ruleName : ruleAstMap.keySet())
1045             processRule(ruleName);
1046     }
1047
1048     private TransformationRule processRule(String ruleName) {
1049         TransformationRule rule = module.getRule(ruleName);
1050         if(rule != null)
1051             return rule;
1052
1053         DRuleAst ruleAst = ruleAstMap.get(ruleName);
1054         if(ruleAst.alreadyProcessing) {
1055             errorLog.log(ruleAst.location, "Cyclic chain of rule extensions.");
1056             return null;
1057         }
1058
1059         TransformationRule[] extendsRules;
1060         int length = ruleAst.extendsNames.length;
1061         if(length == 0)
1062             extendsRules = TransformationRule.EMPTY_ARRAY;
1063         else {
1064             extendsRules = new TransformationRule[length];
1065             for(int i=0;i<length;++i) {
1066                 try {
1067                     String extendsName = ruleAst.extendsNames[i];
1068                     TransformationRule extendsRule;
1069                     if(ruleAstMap.containsKey(extendsName))
1070                         extendsRule = processRule(extendsName);
1071                     else {
1072                         extendsRule = Environments.getRule(compilationContext.environment, extendsName);
1073                         if(extendsRule == null)
1074                             errorLog.log(ruleAst.location,
1075                                     "Couldn't resolve rule name " + extendsName + ".");
1076                     }
1077                     extendsRules[i] = extendsRule;
1078                 } catch(AmbiguousNameException e) {
1079                     errorLog.log(ruleAst.location, e.getMessage());
1080                 }
1081             }
1082         }
1083
1084         final THashMap<SectionName, Query[]> sections = new THashMap<SectionName, Query[]>();
1085
1086         final TranslationContext context = createTranslationContext(ruleName);
1087         if(length > 0) {
1088             THashMap<String, Variable> variables = context.getVariables();
1089             for(TransformationRule extendsRule : extendsRules) {
1090                 if(extendsRule == null)
1091                     continue;
1092                 for(Variable var : extendsRule.variables)
1093                     if(variables.put(var.getName(), var) != null) {
1094                         errorLog.log(ruleAst.location,
1095                                 "Variable " + var.getName() + " is defined in more than one base rule, which is not currently allowed.");
1096                     }
1097             }
1098         }
1099         context.pushExistentialFrame();
1100         ruleAst.getSections().forEachEntry(new TObjectObjectProcedure<String, ArrayList<Query>>() {
1101             @Override
1102             public boolean execute(String sectionNameString, ArrayList<Query> queries) {
1103                 Query[] resolvedQueries = new Query[queries.size()];
1104                 for(int i=0;i<resolvedQueries.length;++i)
1105                     resolvedQueries[i] = queries.get(i).resolve(context);
1106
1107                 SectionName sectionName = SectionName.getSectionName(sectionNameString);
1108                 if(sectionName == null)
1109                     context.getErrorLog().log(queries.get(0).location,
1110                             "Invalid section name " + sectionNameString + ".");
1111                 else
1112                     sections.put(sectionName, resolvedQueries);
1113                 return true;
1114             }
1115         });
1116
1117         Variable[] variables = context.getVariables().values().toArray(new Variable[context.getVariables().size()]);
1118
1119         rule = new TransformationRule(ruleAst.isAbstract,
1120                 Name.create(moduleName, ruleAst.name),
1121                 extendsRules,
1122                 sections, variables);
1123         rule.location = ruleAst.location;
1124         module.addRule(rule);
1125         return rule;
1126     }
1127
1128     public void addDataTypesToEnvironment() {
1129         for(StandardTypeConstructor dataType : dataTypes) {
1130             int constructorTag = 0;
1131             for(Constructor constructor : dataType.constructors) {
1132                 SCLValue value = new SCLValue(constructor.name);
1133                 value.definitionLocation = constructor.loc;
1134                 SCLConstructor sclConstructor =
1135                         new SCLConstructor(
1136                                 constructor.name.name,
1137                                 constructor.javaName,
1138                                 constructor.getTypeVariables(),
1139                                 constructorTag++,
1140                                 constructor.getReturnType(),
1141                                 constructor.fieldNames == null
1142                                         ? SCLConstructor.DEFAULT_FIELD_NAMES[constructor.getParameterTypes().length]
1143                                         : constructor.fieldNames,
1144                                 constructor.recordFieldNames,
1145                                 constructor.getParameterTypes());
1146                 if(dataType.constructors.length == 1 && (
1147                         dataType.getTypeDesc() == null ||
1148                         (dataType.constructors[0].javaName != null &&
1149                         dataType.constructors[0].javaName.equals(MethodBuilderBase.getClassName(dataType.getTypeDesc())))))
1150                     sclConstructor.setOnlyConstructor(true);
1151                 value.setValue(sclConstructor);
1152                 value.setType(constructor.getType());
1153
1154                 NameExistenceChecks.checkIfValueExists(errorLog, constructor.loc,
1155                         importedEnvironment, module, constructor.name.name);
1156                 if(module.addValue(value)) {
1157                     errorLog.log(constructor.loc,
1158                             "Value " + constructor.name.name + " is already defined.");
1159                 }
1160             }
1161         }
1162     }
1163
1164     public void addTypeClassesToEnvironment() {
1165         for(TypeClass typeClass : module.getTypeClasses()) {
1166             for(TypeClassMethod method : typeClass.methods.values()) {
1167                 SCLValue value = method.createValue();
1168                 value.definitionLocation = method.location;
1169                 NameExistenceChecks.checkIfValueExists(errorLog, Locations.NO_LOCATION,
1170                         importedEnvironment, module, value.getName().name);
1171
1172                 if(module.addValue(value)) {
1173                     String name = method.getName();
1174                     long location = Locations.NO_LOCATION;
1175                     ArrayList<DValueAst> definitions = valueDefinitionsAst.getDefinition(name);
1176                     if(definitions != null && !definitions.isEmpty())
1177                         location = definitions.get(0).location;
1178                     errorLog.log(location, "Value " + name + " is already defined.");
1179                 }
1180             }
1181         }
1182     }
1183
1184     public void preprocessValueDefinitions(ArrayList<DValueTypeAst> typeAnnotationsAst) {
1185         for(String name : valueDefinitionsAst.getValueNames()) {
1186             SCLValue value = new SCLValue(Name.create(moduleName, name));
1187
1188             long location = valueDefinitionsAst.getLocation(name);
1189             NameExistenceChecks.checkIfValueExists(errorLog, location,
1190                     importedEnvironment, module, value.getName().name);
1191             value.definitionLocation = location;
1192             if(module.addValue(value))
1193                 errorLog.log(location, "Value " + name + " is already defined.");
1194             if(valueDefinitionsAst.isDerived(name))
1195                 value.addProperty(DerivedProperty.INSTANCE);
1196         }
1197         for(DValueTypeAst valueTypeAst : typeAnnotationsAst)
1198             for(EVar name : valueTypeAst.names) {
1199                 SCLValue value = module.getValue(name.name);
1200                 if(value == null) {
1201                     errorLog.log(valueTypeAst.location, name.name + " is not defined.");
1202                     value = new SCLValue(Name.create(moduleName, name.name));
1203                     module.addValue(value);
1204                 }
1205                 value.definitionLocation = name.location;
1206             }
1207         for(String name : relationDefinitionsAst.getRelationNames()) {
1208             ConcreteRelation relation = new ConcreteRelation(name);
1209             module.addRelation(name, relation);
1210         }
1211     }
1212
1213     public void addValueDefinitionsToEnvironment(ArrayList<DValueTypeAst> typeAnnotationsAst) {
1214         THashMap<String, DValueTypeAst> typeMap = new THashMap<String, DValueTypeAst>();
1215         for(DValueTypeAst valueTypeAst : typeAnnotationsAst)
1216             for(EVar name : valueTypeAst.names) {
1217                 if(typeMap.containsKey(name.name))
1218                     errorLog.log(valueTypeAst.location, "Type of "+name.name+" has already been declared in this module.");
1219                 else
1220                     typeMap.put(name.name, valueTypeAst);
1221             }
1222
1223         for(String name : valueDefinitionsAst.getValueNames()) {
1224             ArrayList<DValueAst> defs = valueDefinitionsAst.getDefinition(name);
1225             if(defs.size() != 1 || !(defs.get(0).value instanceof EPreCHRRulesetConstructor))
1226                 continue;
1227             try {
1228                 SCLValue value = module.getValue(name);
1229                 TranslationContext context = createTranslationContext(name);
1230                 Expression expression = context.translateCases2(defs);
1231                 value.setExpression(expression);
1232
1233                 if(exportMap != null && exportMap.remove(name) == null)
1234                     value.addProperty(PrivateProperty.INSTANCE);
1235             } catch(RuntimeException e) {
1236                 errorLog.setExceptionPosition(defs.get(0).location);
1237                 throw e;
1238             }
1239         }
1240         for(String name : valueDefinitionsAst.getValueNames()) {
1241             ArrayList<DValueAst> defs = valueDefinitionsAst.getDefinition(name);
1242             if(defs.size() == 1 && defs.get(0).value instanceof EPreCHRRulesetConstructor)
1243                 continue;
1244             try {
1245                 SCLValue value = module.getValue(name);
1246                 TranslationContext context = createTranslationContext(name);
1247                 Expression expression = context.translateCases2(defs);
1248                 value.setExpression(expression);
1249
1250                 DValueTypeAst valueTypeAst = typeMap.remove(name);
1251                 if(valueTypeAst != null)
1252                     value.setType(Types.closure(context.toType(valueTypeAst.type)));
1253
1254                 ArrayList<DAnnotationAst> annotations = valueDefinitionsAst.getAnnotations(name);
1255                 if(annotations != null)
1256                     for(DAnnotationAst annotation : annotations) {
1257                         handleAnnotation(value, defs, annotation);
1258                     }
1259                 if(exportMap != null && exportMap.remove(name) == null)
1260                     value.addProperty(PrivateProperty.INSTANCE);
1261             } catch(RuntimeException e) {
1262                 errorLog.setExceptionPosition(defs.get(0).location);
1263                 throw e;
1264             }
1265         }
1266         for(String name : relationDefinitionsAst.getRelationNames()) {
1267             ArrayList<DRelationAst> definitions = relationDefinitionsAst.getDefinition(name);
1268             if(definitions.size() > 1) {
1269                 errorLog.log(definitions.get(1).location,
1270                         "Does not yet support definition of relations by more than one rule.");
1271                 continue;
1272             }
1273
1274             DRelationAst definition = definitions.get(0);
1275             ConcreteRelation relation = (ConcreteRelation)module.getRelation(name);
1276             relation.location = definition.location;
1277             TranslationContext context = createTranslationContext(name);
1278             definition.translateTo(context, relation);
1279         }
1280     }
1281
1282     private TranslationContext createTranslationContext(String definitionName) {
1283         return new TranslationContext(compilationContext, null, definitionName);
1284     }
1285
1286     private void handleAnnotation(SCLValue value, ArrayList<DValueAst> defs, DAnnotationAst annotation) {
1287         if(annotation.id.text.equals("@macro")) {
1288             value.setMacroRule(new StandardMacroRule());
1289         }
1290         else if(annotation.id.text.equals("@inline")) {
1291             try {
1292                 int arity = defs.get(0).lhs.getFunctionDefinitionPatternArity();
1293                 int phaseMask = 0xffffffff;
1294                 if(annotation.parameters.length > 0) {
1295                     phaseMask = Integer.parseInt(((EIntegerLiteral)annotation.parameters[0]).getValue());
1296                 }
1297                 value.addProperty(new InlineProperty(arity, phaseMask));
1298             } catch(NotPatternException e) {
1299                 errorLog.log(annotation.location, "Inline annotation is invalid: this is not a function.");
1300             }
1301         }
1302         else if(annotation.id.text.equals("@private")) {
1303             if(moduleHeader != null && moduleHeader.export != null)
1304                 errorLog.log(annotation.location, "Annotation @private is not used when module header contains export property.");
1305             value.addProperty(PrivateProperty.INSTANCE);
1306         }
1307         else if(annotation.id.text.equals("@deprecated")) {
1308             String description = "";
1309             if(annotation.parameters.length > 0) {
1310                 if(annotation.parameters.length > 1)
1311                     errorLog.log(annotation.location, "Invalid number of parameters, expected one string.");
1312                 else {
1313                     String temp = AnnotationUtils.extractString(annotation.parameters[0]);
1314                     if(temp == null)
1315                         errorLog.log(annotation.location, "Invalid parameter, expected one string.");
1316                     else
1317                         description = temp;
1318                 }
1319             }
1320             value.addProperty(new DeprecatedProperty(description));
1321         }
1322         else
1323             errorLog.log(annotation.location, "Unknown annotation.");
1324     }
1325
1326     public void addSupplementedTypeAnnotationsToEnvironment() {
1327         for(SupplementedValueType valueType : supplementedTypeAnnotations) {
1328             Type type = Types.closure(valueType.type);
1329             String name = valueType.name;
1330             SCLValue value = module.getValue(name);
1331             if(value == null)
1332                 errorLog.log(valueType.position,
1333                         name + " is not defined.");
1334             else if(value.getType()==null)
1335                 value.setType(type);
1336             else
1337                 errorLog.log(valueType.position,
1338                         "Type of "+name+" has already been declared in this module.");
1339         }
1340     }
1341
1342     public void addFixityToEnvironment(ArrayList<DFixityAst> fixityAst) {
1343         for(DFixityAst fixity : fixityAst) {
1344             for(EVar symbol : fixity.symbols) {
1345                 String name = symbol.name;
1346                 SCLValue value = module.getValue(name);
1347                 if(value == null)
1348                     errorLog.log(symbol.location,
1349                             name + " is not defined.");
1350                 else
1351                     value.setPrecedence(fixity.precedence);
1352             }
1353         }
1354     }
1355
1356     public void addCoverageBranchPoints() {
1357         branchPoints = new THashMap<String, BranchPoint[]>();
1358         BranchPointInjector injector = new BranchPointInjector();
1359         for(String valueName : valueDefinitionsAst.getValueNames()) {
1360             for(DValueAst valueAst : valueDefinitionsAst.getDefinition(valueName))
1361                 valueAst.value = injector.injectBranchPoint(valueAst.value);
1362             branchPoints.put(valueName, injector.getAndClearBranchPoints());
1363         }
1364     }
1365
1366     public void collectDebugInfo() {
1367         module.moduleDebugInfo = compilationContext.moduleDebugInfo = new ModuleDebugInfo();
1368     }
1369
1370     public void prepareExports() {
1371         if(moduleHeader != null && moduleHeader.export != null) {
1372             exportMap = new THashMap<String, EVar>();
1373             for(EVar export : moduleHeader.export)
1374                 if(exportMap.put(export.name, export) != null)
1375                     errorLog.log(export.location, "The symbol " + export.name + " is exported multiple times.");
1376         }
1377     }
1378
1379     public void checkExports() {
1380         if(exportMap != null)
1381             for(EVar export : exportMap.values())
1382                     errorLog.log(export.location, "The symbol " + export.name + " is not defined in the module.");
1383     }
1384 }