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.componentaccess.ComponentAccess;
  16 import org.simantics.scl.compiler.constants.componentaccess.FieldComponentAccess;
  17 import org.simantics.scl.compiler.constants.generic.CallJava;
  18 import org.simantics.scl.compiler.constants.generic.ClassRef;
  19 import org.simantics.scl.compiler.constants.generic.ConvertToListFilter;
  20 import org.simantics.scl.compiler.constants.generic.MethodRef;
  21 import org.simantics.scl.compiler.constants.generic.OutputFilter;
  22 import org.simantics.scl.compiler.constants.generic.ParameterStackItem;
  23 import org.simantics.scl.compiler.constants.generic.Pop2OutputFilter;
  24 import org.simantics.scl.compiler.constants.generic.PopOutputFilter;
  25 import org.simantics.scl.compiler.constants.generic.StackItem;
  26 import org.simantics.scl.compiler.constants.generic.ThreadLocalStackItem;
  27 import org.simantics.scl.compiler.constants.singletons.SafeCoerce;
  28 import org.simantics.scl.compiler.elaboration.contexts.TranslationContext;
  29 import org.simantics.scl.compiler.elaboration.contexts.TypeTranslationContext;
  30 import org.simantics.scl.compiler.elaboration.errors.NotPatternException;
  31 import org.simantics.scl.compiler.elaboration.expressions.EApply;
  32 import org.simantics.scl.compiler.elaboration.expressions.EGetConstraint;
  33 import org.simantics.scl.compiler.elaboration.expressions.EIntegerLiteral;
  34 import org.simantics.scl.compiler.elaboration.expressions.EListLiteral;
  35 import org.simantics.scl.compiler.elaboration.expressions.ELiteral;
  36 import org.simantics.scl.compiler.elaboration.expressions.EPreCHRRulesetConstructor;
  37 import org.simantics.scl.compiler.elaboration.expressions.EVar;
  38 import org.simantics.scl.compiler.elaboration.expressions.Expression;
  39 import org.simantics.scl.compiler.elaboration.expressions.Variable;
  40 import org.simantics.scl.compiler.elaboration.expressions.annotations.AnnotationUtils;
  41 import org.simantics.scl.compiler.elaboration.fundeps.Fundep;
  42 import org.simantics.scl.compiler.elaboration.java.JavaMethodDeclaration;
  43 import org.simantics.scl.compiler.elaboration.macros.StandardMacroRule;
  44 import org.simantics.scl.compiler.elaboration.modules.DeprecatedProperty;
  45 import org.simantics.scl.compiler.elaboration.modules.DerivedProperty;
  46 import org.simantics.scl.compiler.elaboration.modules.InlineProperty;
  47 import org.simantics.scl.compiler.elaboration.modules.MethodImplementation;
  48 import org.simantics.scl.compiler.elaboration.modules.PrivateProperty;
  49 import org.simantics.scl.compiler.elaboration.modules.SCLValue;
  50 import org.simantics.scl.compiler.elaboration.modules.TypeAlias;
  51 import org.simantics.scl.compiler.elaboration.modules.TypeClass;
  52 import org.simantics.scl.compiler.elaboration.modules.TypeClassInstance;
  53 import org.simantics.scl.compiler.elaboration.modules.TypeClassMethod;
  54 import org.simantics.scl.compiler.elaboration.modules.TypeDescriptor;
  55 import org.simantics.scl.compiler.elaboration.query.Query;
  56 import org.simantics.scl.compiler.elaboration.query.pre.QPreGuard;
  57 import org.simantics.scl.compiler.elaboration.relations.ConcreteRelation;
  58 import org.simantics.scl.compiler.elaboration.rules.MappingRelation;
  59 import org.simantics.scl.compiler.elaboration.rules.SectionName;
  60 import org.simantics.scl.compiler.elaboration.rules.TransformationRule;
  61 import org.simantics.scl.compiler.environment.AmbiguousNameException;
  62 import org.simantics.scl.compiler.environment.Environment;
  63 import org.simantics.scl.compiler.environment.EnvironmentFactory;
  64 import org.simantics.scl.compiler.environment.Environments;
  65 import org.simantics.scl.compiler.errors.CompilationError;
  66 import org.simantics.scl.compiler.errors.ErrorLog;
  67 import org.simantics.scl.compiler.errors.ErrorSeverity;
  68 import org.simantics.scl.compiler.errors.Locations;
  69 import org.simantics.scl.compiler.internal.codegen.effects.EffectConstructor;
  70 import org.simantics.scl.compiler.internal.codegen.effects.ThreadLocalVariable;
  71 import org.simantics.scl.compiler.internal.codegen.types.JavaReferenceValidator;
  72 import org.simantics.scl.compiler.internal.codegen.types.JavaReferenceValidatorFactory;
  73 import org.simantics.scl.compiler.internal.codegen.types.JavaTypeTranslator;
  74 import org.simantics.scl.compiler.internal.codegen.types.StandardTypeConstructor;
  75 import org.simantics.scl.compiler.internal.codegen.utils.Constants;
  76 import org.simantics.scl.compiler.internal.codegen.utils.JavaNamingPolicy;
  77 import org.simantics.scl.compiler.internal.codegen.utils.MethodBuilderBase;
  78 import org.simantics.scl.compiler.internal.deriving.InstanceDeriver;
  79 import org.simantics.scl.compiler.internal.deriving.InstanceDerivers;
  80 import org.simantics.scl.compiler.internal.elaboration.profiling.BranchPointInjector;
  81 import org.simantics.scl.compiler.internal.elaboration.utils.StronglyConnectedComponents;
  82 import org.simantics.scl.compiler.internal.header.ModuleHeader;
  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.translation.ProcessedDClassAst;
 100 import org.simantics.scl.compiler.internal.parsing.translation.ProcessedDInstanceAst;
 101 import org.simantics.scl.compiler.internal.parsing.translation.RelationRepository;
 102 import org.simantics.scl.compiler.internal.parsing.translation.ValueRepository;
 103 import org.simantics.scl.compiler.internal.parsing.types.TypeAst;
 104 import org.simantics.scl.compiler.module.ConcreteModule;
 105 import org.simantics.scl.compiler.module.ImportDeclaration;
 106 import org.simantics.scl.compiler.module.InvalidModulePathException;
 107 import org.simantics.scl.compiler.module.ModuleUtils;
 108 import org.simantics.scl.compiler.module.debug.ModuleDebugInfo;
 109 import org.simantics.scl.compiler.module.repository.ImportFailure;
 110 import org.simantics.scl.compiler.module.repository.ImportFailureException;
 111 import org.simantics.scl.compiler.types.TCon;
 112 import org.simantics.scl.compiler.types.TForAll;
 113 import org.simantics.scl.compiler.types.TFun;
 114 import org.simantics.scl.compiler.types.TPred;
 115 import org.simantics.scl.compiler.types.TVar;
 116 import org.simantics.scl.compiler.types.Type;
 117 import org.simantics.scl.compiler.types.Types;
 118 import org.simantics.scl.compiler.types.kinds.Kind;
 119 import org.simantics.scl.compiler.types.kinds.Kinds;
 120 import org.simantics.scl.compiler.types.util.MultiFunction;
 121 import org.simantics.scl.runtime.profiling.BranchPoint;
 122
 123 import gnu.trove.list.array.TIntArrayList;
 124 import gnu.trove.map.hash.THashMap;
 125 import gnu.trove.map.hash.TObjectIntHashMap;
 126 import gnu.trove.procedure.TObjectObjectProcedure;
 127 import gnu.trove.set.hash.THashSet;
 128 import gnu.trove.set.hash.TIntHashSet;
 129
 130 public class Elaboration {
 131     // inputs
 132     private final CompilationContext compilationContext;
 133     private final ErrorLog errorLog;
 134     private final String moduleName;
 135     private final ModuleHeader moduleHeader;
 136     private final ArrayList<ImportDeclaration> importsAst;
 137     private final JavaReferenceValidatorFactory jrvFactory;
 138     final JavaReferenceValidator<Object, Object, Object, Object> javaReferenceValidator;
 139     private final ValueRepository valueDefinitionsAst;
 140     private final RelationRepository relationDefinitionsAst;
 141
 142     // creates
 143     ConcreteModule module;
 144     Environment importedEnvironment;
 145     ArrayList<SupplementedValueType> supplementedTypeAnnotations = new ArrayList<SupplementedValueType>();
 146
 147     JavaTypeTranslator javaTypeTranslator;
 148     ArrayList<StandardTypeConstructor> dataTypes = new ArrayList<StandardTypeConstructor>();
 149     THashMap<String, ClassRef> classRefs = new THashMap<String, ClassRef>();
 150     THashMap<String, BranchPoint[]> branchPoints;
 151
 152     THashMap<String, EVar> exportMap = null;
 153
 154     public Elaboration(CompilationContext compilationContext, CompilationTimer timer, EnvironmentFactory localEnvironmentFactory,
 155             String moduleName, ModuleHeader moduleHeader, ArrayList<ImportDeclaration> importsAst,
 156             JavaReferenceValidatorFactory jrvFactory,
 157             ValueRepository valueDefinitionsAst,
 158             RelationRepository relationDefinitionsAst) {
 159         this.compilationContext = compilationContext;
 160         this.errorLog = compilationContext.errorLog;
 161         this.moduleName = moduleName;
 162         this.moduleHeader = moduleHeader;
 163         if(moduleName != null)
 164             importsAst = processRelativeImports(compilationContext.errorLog, moduleName, importsAst);
 165         this.importsAst = importsAst;
 166         this.jrvFactory = jrvFactory;
 167         this.javaReferenceValidator = moduleHeader == null || moduleHeader.classLoader == null
 168                 ? jrvFactory.getDefaultJavaReferenceValidator()
 169                 : jrvFactory.getJavaReferenceValidator(moduleHeader.classLoader);
 170         if(javaReferenceValidator == null)
 171             errorLog.log(moduleHeader.classLoaderLocation, "Didn't find the specified class loader.");
 172         this.valueDefinitionsAst = valueDefinitionsAst;
 173         this.relationDefinitionsAst = relationDefinitionsAst;
 174
 175         module = new ConcreteModule(moduleName);
 176         compilationContext.module = module;
 177         compilationContext.moduleRepository = localEnvironmentFactory.getModuleRepository();
 178         if(moduleHeader != null) {
 179             if(moduleHeader.defaultLocalName != null)
 180                 module.setDefaultLocalName(moduleHeader.defaultLocalName);
 181             if(moduleHeader.deprecated != null)
 182                 module.setDeprecation(moduleHeader.deprecated);
 183         }
 184         try {
 185             if(timer != null)
 186                 timer.suspendTimer();
 187             importedEnvironment = localEnvironmentFactory.createEnvironment(
 188                     compilationContext,
 189                     importsAst.toArray(new ImportDeclaration[importsAst.size()]));
 190             if(timer != null)
 191                 timer.continueTimer();
 192             compilationContext.environment = new EnvironmentOfModule(importedEnvironment, module);
 193         } catch (ImportFailureException e) {
 194             for(ImportFailure failure : e.failures)
 195                 errorLog.log(new CompilationError(failure.location, failure.toString(),
 196                         failure.reason == ImportFailure.MODULE_DOES_NOT_EXIST_REASON ? ErrorSeverity.ERROR : ErrorSeverity.IMPORT_ERROR));
 197             return;
 198         }
 199         for(ImportDeclaration importAst : importsAst)
 200             this.module.addDependency(new ImportDeclaration(
 201                     importAst.moduleName,
 202                     importAst.reexport ? importAst.localName : null,
 203                     false,
 204                     importAst.spec));
 205         localEnvironmentFactory.addBuiltinDependencies(module);
 206         compilationContext.namingPolicy = new JavaNamingPolicy(moduleName);
 207     }
 208
 209     public static ArrayList<ImportDeclaration> processRelativeImports(ErrorLog errorLog, String moduleName, ArrayList<ImportDeclaration> relativeImports) {
 210         ArrayList<ImportDeclaration> absoluteImports = new ArrayList<ImportDeclaration>(relativeImports.size());
 211         for(ImportDeclaration relativeImport : relativeImports) {
 212             if(relativeImport.moduleName.startsWith(".")) {
 213                                 try {
 214                                         String absoluteModuleName = ModuleUtils.resolveAbsolutePath(moduleName, relativeImport.moduleName);
 215                     ImportDeclaration absoluteImport = new ImportDeclaration(
 216                             relativeImport.location,
 217                             absoluteModuleName, relativeImport.localName,
 218                             relativeImport.reexport, relativeImport.spec);
 219                     absoluteImports.add(absoluteImport);
 220                                 } catch (InvalidModulePathException e) {
 221                                     if(errorLog != null)
 222                                         errorLog.log(relativeImport.location, e.getMessage());
 223                                 }
 224             }
 225             else
 226                 absoluteImports.add(relativeImport);
 227         }
 228         return absoluteImports;
 229     }
 230
 231     public void addTypesToEnvironment(
 232             ArrayList<DDataAst> dataTypesAst,
 233             ArrayList<DTypeAst> typeAliasesAst,
 234             ArrayList<DEffectAst> effectsAst,
 235             ArrayList<DRulesetAst> rulesetsAst) {
 236         for(DDataAst dataType : dataTypesAst) {
 237             dataType.parameterKinds = new Kind[dataType.parameters.length];
 238             Kind constructorKind = Kinds.STAR;
 239             for(int i=dataType.parameters.length-1;i>=0;--i) {
 240                 Kind kind = Kinds.metaVar();
 241                 dataType.parameterKinds[i] = kind;
 242                 constructorKind = Kinds.arrow(kind, constructorKind);
 243             }
 244
 245             StandardTypeConstructor typeConstructor = new StandardTypeConstructor(
 246                     Types.con(moduleName, dataType.name), constructorKind);
 247
 248             NameExistenceChecks.checkIfTypeExists(errorLog,
 249                     dataType.location, importedEnvironment, dataType.name);
 250             addTypeDescriptor(dataType.location, dataType.name, typeConstructor);
 251             dataType.typeConstructor = typeConstructor;
 252         }
 253
 254         for(DTypeAst typeAlias : typeAliasesAst) {
 255             TypeAlias alias = new TypeAlias(Types.con(moduleName, typeAlias.name), typeAlias.parameters.length);
 256             NameExistenceChecks.checkIfTypeExists(errorLog,
 257                     typeAlias.location, importedEnvironment, typeAlias.name);
 258             addTypeDescriptor(typeAlias.location, typeAlias.name, alias);
 259         }
 260
 261         for(DEffectAst effect : effectsAst) {
 262             EffectConstructor effectConstructor = new EffectConstructor(Types.con(moduleName, effect.name));
 263             effectConstructor.addThreadLocalVariable(
 264                     new ThreadLocalVariable(
 265                             effect.variableName,
 266                             TypeDesc.forClass(effect.threadLocalType)
 267                             ));
 268             if(module.addEffectConstructor(effect.name, effectConstructor))
 269                 errorLog.log(effect.location, "Effect "+effect.name+" has already been defined in this module.");
 270         }
 271         for(DRulesetAst ruleset : rulesetsAst) {
 272             ruleset.type = Types.con(moduleName, ruleset.name);
 273             ruleset.className = compilationContext.namingPolicy.getDataTypeClassName(ruleset.name);
 274             StandardTypeConstructor typeConstructor = new StandardTypeConstructor(ruleset.type, Kinds.STAR,
 275                     TypeDesc.forClass(ruleset.className), ruleset.documentation == null ? null : ruleset.documentation.documentation);
 276             typeConstructor.external = true;
 277             addTypeDescriptor(ruleset.location, ruleset.name, typeConstructor);
 278         }
 279         javaTypeTranslator = new JavaTypeTranslator(compilationContext.environment);
 280         compilationContext.javaTypeTranslator = javaTypeTranslator;
 281     }
 282
 283     private void addTypeDescriptor(long location, String name, TypeDescriptor typeDescriptor) {
 284         if(module.addTypeDescriptor(name, typeDescriptor))
 285             errorLog.log(location, "Type "+name+" has already been defined in this module.");
 286     }
 287
 288     private static final int[] EMPTY_INT_ARRAY = new int[0];
 289
 290     public void processTypeAliases(ArrayList<DTypeAst> typeAliasesAst) {
 291         TObjectIntHashMap<String> typeAliasMap = new TObjectIntHashMap<String>();
 292         for(int i=0;i<typeAliasesAst.size();++i)
 293             typeAliasMap.put(typeAliasesAst.get(i).name, i);
 294         TIntHashSet tempIntSet = new TIntHashSet();
 295         ArrayList<DTypeAst> orderedTypeAliases = new ArrayList<DTypeAst>(typeAliasesAst.size());
 296         //for(int i=0;i<typeAliasesAst.size();++i)
 297         //    System.out.println(i + "# " + typeAliasesAst.get(i).name);
 298         new StronglyConnectedComponents(typeAliasesAst.size()) {
 299             @Override
 300             protected int[] findDependencies(int u) {
 301                 typeAliasesAst.get(u).type.collectReferences(typeAliasMap, tempIntSet);
 302                 if(tempIntSet.isEmpty())
 303                     return EMPTY_INT_ARRAY;
 304                 if(tempIntSet.contains(u)) {
 305                     errorLog.log(typeAliasesAst.get(u).location, "Type alias has a self reference.");
 306                     tempIntSet.remove(u);
 307                 }
 308                 int[] result = tempIntSet.toArray();
 309                 tempIntSet.clear();
 310                 //System.out.println(u + " -> " + Arrays.toString(result));
 311                 return result;
 312             }
 313             @Override
 314             protected void reportComponent(int[] component) {
 315                 //System.out.println("component: " + Arrays.toString(component));
 316                 if(component.length > 1) {
 317                     StringBuilder b = new StringBuilder();
 318                     b.append("Recursively defined type alias (");
 319                     long minLocation = typeAliasesAst.get(component[0]).location;
 320                     boolean first = true;
 321                     for(int u : component) {
 322                         DTypeAst typeAlias = typeAliasesAst.get(u);
 323                         if(first)
 324                             first = false;
 325                         else
 326                             b.append(", ");
 327                         b.append(typeAlias.name);
 328                         if(Locations.beginOf(typeAlias.location) < Locations.beginOf(minLocation))
 329                             minLocation = typeAlias.location;
 330                     }
 331                     b.append(").");
 332                     errorLog.log(minLocation, b.toString());
 333                 }
 334                 else
 335                     orderedTypeAliases.add(typeAliasesAst.get(component[0]));
 336             }
 337         }.findComponents();
 338
 339         if(errorLog.hasNoErrors()) {
 340             for(DTypeAst typeAlias : orderedTypeAliases) {
 341                 TypeAlias alias = (TypeAlias)module.getTypeDescriptor(typeAlias.name);
 342                 TypeTranslationContext context = createTypeTranslationContext();
 343                 for(int i=0;i<typeAlias.parameters.length;++i)
 344                     context.pushTypeVar(typeAlias.parameters[i]);
 345                 alias.body = typeAlias.type.toType(context, Kinds.metaVar());
 346                 for(int i=0;i<typeAlias.parameters.length;++i)
 347                     alias.parameters[i] = context.popTypeVar(typeAlias.parameters[i], null);
 348             }
 349         }
 350     }
 351
 352     public void processDataTypes(ArrayList<DDataAst> dataTypesAst) {
 353         ArrayList<Runnable> fieldAccessorGenerators = new ArrayList<Runnable>();
 354         for(DDataAst dataTypeAst : dataTypesAst) {
 355             TypeTranslationContext context = createTypeTranslationContext();
 356             TVar[] typeParameters = new TVar[dataTypeAst.parameters.length];
 357             for(int i=0;i<dataTypeAst.parameters.length;++i)
 358                 typeParameters[i] = context.addTypeVar(dataTypeAst.parameters[i]);
 359             Constructor[] constructors = new Constructor[dataTypeAst.constructors.length];
 360             String className = null;
 361             boolean external = false;
 362             for(DAnnotationAst annotation : dataTypeAst.getAnnotations()) {
 363                 if(annotation.id.text.equals("@JavaType")) {
 364                     if(annotation.parameters.length != 1 ||
 365                             !(annotation.parameters[0] instanceof ELiteral) ||
 366                             !(((ELiteral)annotation.parameters[0]).getValue() instanceof StringConstant))
 367                         errorLog.log(annotation.location, "Invalid parameters. Expected @JavaType \"className\".");
 368                     else {
 369                         className = ((StringConstant)((ELiteral)annotation.parameters[0]).getValue()).getValue().replace('.', '/');
 370                         external = true;
 371                         break;
 372                     }
 373                 }
 374             }
 375
 376             boolean trivialDataType = dataTypeAst.constructors.length == 1 &&
 377                     dataTypeAst.constructors[0].parameters.length == 1;
 378             if(className == null && !trivialDataType)
 379                 className = compilationContext.namingPolicy.getDataTypeClassName(dataTypeAst.name);
 380
 381             StandardTypeConstructor dataType = dataTypeAst.typeConstructor;
 382
 383             dataType.setType(Types.con(moduleName, dataTypeAst.name), typeParameters);
 384             dataType.setConstructors(constructors);
 385             if(!trivialDataType)
 386                 dataType.setTypeDesc(TypeDesc.forClass(className));
 387             if(!external || dataTypeAst.constructors.length > 0) {
 388                 dataType.isOpen = false;
 389             }
 390             dataType.external = external;
 391             dataTypes.add(dataType);
 392             for(int j=0;j<constructors.length;++j) {
 393                 ConstructorAst constructor = dataTypeAst.constructors[j];
 394                 String name = constructor.name.text;
 395                 Type[] parameterTypes = new Type[constructor.parameters.length];
 396                 for(int i=constructor.parameters.length-1;i>=0;--i)
 397                     parameterTypes[i] = context.toType(constructor.parameters[i]);
 398                 String javaName = constructors.length == 1 ? className
 399                         : compilationContext.namingPolicy.getConstructorClassName(name);
 400                 ComponentAccess[] componentAccesses = null;
 401                 for(DAnnotationAst annotation : constructor.annotations)
 402                     if(annotation.id.text.equals("@JavaType")) {
 403                         try {
 404                             javaName = ((StringConstant)((ELiteral)annotation.parameters[0])
 405                                     .getValue()).getValue();
 406                         } catch(Exception e) {
 407                             errorLog.log(annotation.parameters[0].location, "Invalid annotation parameter.");
 408                         }
 409                     }
 410                     else if(annotation.id.text.equals("@FieldNames")) {
 411                         try {
 412                             EListLiteral literal = (EListLiteral)annotation.parameters[0];
 413                             componentAccesses = new ComponentAccess[literal.getComponents().length];
 414                             for(int i=0;i<componentAccesses.length;++i) {
 415                                 Expression component = literal.getComponents()[i];
 416                                 if(component instanceof EVar)
 417                                     componentAccesses[i] = new FieldComponentAccess(((EVar)component).name);
 418                                 else if(component instanceof ELiteral)
 419                                     componentAccesses[i] = new FieldComponentAccess(((StringConstant)((ELiteral)component).getValue()).getValue());
 420                             }
 421                         } catch(Exception e) {
 422                             errorLog.log(annotation.parameters[0].location, "Invalid annotation parameter.");
 423                             componentAccesses = null;
 424                         }
 425                     }
 426
 427                 constructors[j] = new Constructor(constructor.location, dataType,
 428                         Name.create(moduleName, name),
 429                         parameterTypes, javaName);
 430                 constructors[j].componentAccesses = componentAccesses;
 431                 constructors[j].recordFieldNames = constructor.fieldNames;
 432             }
 433             if(constructors.length == 1) {
 434                 Constructor constructor = constructors[0];
 435                 if(constructor.recordFieldNames != null) {
 436                     fieldAccessorGenerators.add(new Runnable() {
 437                         @Override
 438                         public void run() {
 439                             Type in = Types.apply(dataType.name, dataType.parameters);
 440
 441                             ComponentAccess[] componentAccesses = constructor.componentAccesses != null
 442                                         ? constructor.componentAccesses
 443                                     : SCLConstructor.DEFAULT_FIELD_NAMES[constructor.recordFieldNames.length];
 444                             for(int i=0;i<constructor.recordFieldNames.length;++i) {
 445                                 Type out = constructor.parameterTypes[i];
 446                                 Constant accessor;
 447                                 if(trivialDataType)
 448                                     accessor = new SafeCoerce(dataType.parameters, in, out);
 449                                 else
 450                                     accessor = new CallJava(dataType.parameters, Types.NO_EFFECTS, out,
 451                                             new Type[] {in}, new StackItem[] {new ParameterStackItem(0, in)},
 452                                             componentAccesses[i].toMethodRef(constructor.javaName, javaTypeTranslator.toTypeDesc(out)),
 453                                             null);
 454                                 module.addFieldAccessor(constructor.recordFieldNames[i], accessor);
 455                             }
 456                         }
 457                     });
 458                 }
 459             }
 460         }
 461
 462         for(Runnable fieldAccessorGenerator : fieldAccessorGenerators)
 463             fieldAccessorGenerator.run();
 464     }
 465
 466     public void processTypeClasses(ArrayList<ProcessedDClassAst> typeClassesAst) {
 467         for(ProcessedDClassAst pClassAst : typeClassesAst) {
 468             DClassAst classAst = pClassAst.orig;
 469
 470             if(module.getTypeClass(classAst.name) != null) {
 471                 errorLog.log(classAst.location, "Class "+classAst.name+" has already been defined in this module.");
 472                 continue;
 473             }
 474
 475             TypeTranslationContext context = createTypeTranslationContext();
 476
 477             TPred[] classContext = new TPred[classAst.context.length];
 478             for(int i=0;i<classContext.length;++i)
 479                 classContext[i] = context.toTFuncApply(classAst.context[i]);
 480
 481             TVar[] parameters = new TVar[classAst.parameters.length];
 482
 483             if(classAst.name.equals("Functor") || classAst.name.equals("Monad")) {
 484                 // FIXME hack
 485                 parameters[0] = context.resolveTypeVariable(pClassAst.orig.location, classAst.parameters[0], Kinds.STAR_TO_STAR);
 486             }
 487             else {
 488                 for(int i=0;i<parameters.length;++i)
 489                     parameters[i] = context.resolveTypeVariable(pClassAst.orig.location, classAst.parameters[i], Kinds.metaVar());
 490             }
 491
 492             TCon con = Types.con(moduleName, classAst.name);
 493             TypeClass typeClass = new TypeClass(classAst.location,
 494                     classContext,
 495                     con,
 496                     compilationContext.namingPolicy.getTypeClassInterfaceName(con),
 497                     parameters,
 498                     Fundep.mapFundeps(classAst.parameters, classAst.fundeps));
 499
 500             THashMap<String, TypeClassMethod> methods = typeClass.methods;
 501             for(DValueTypeAst methodDecl : pClassAst.typeDeclarations) {
 502                 try {
 503                     Type type;
 504                     try {
 505                         type = context.toType(methodDecl.type);
 506                     } catch(SCLSyntaxErrorException e) {
 507                         errorLog.log(e.location, e.getMessage());
 508                         continue;
 509                     }
 510                     for(EVar name : methodDecl.names) {
 511                         typeClass.methodNames.add(name.name);
 512                         methods.put(name.name,
 513                                 new TypeClassMethod(typeClass, name.name,
 514                                         compilationContext.namingPolicy.getMethodName(name.name),
 515                                         type, Types.getArity(type),
 516                                         name.location)
 517                                 );
 518                     }
 519                 } catch(RuntimeException e) {
 520                     errorLog.setExceptionPosition(methodDecl.location);
 521                     throw e;
 522                 }
 523             }
 524
 525             for(String methodName : pClassAst.defaultImplementations.getValueNames()) {
 526                 String fullName = "_" + classAst.name + "_default_" + methodName;
 527                 ArrayList<DValueAst> defs = pClassAst.defaultImplementations.getDefinition(methodName);
 528
 529                 TypeClassMethod method = typeClass.methods.get(methodName);
 530                 if(method == null) {
 531                     errorLog.log(defs.get(0).location, "Method " + methodName + " is not defined in this class.");
 532                     continue;
 533                 }
 534                 method.setDefaultImplementation(Name.create(moduleName, fullName));
 535
 536                 valueDefinitionsAst.addDefinitions(fullName, defs);
 537                 supplementedTypeAnnotations.add(new SupplementedValueType(defs.get(0).location, fullName, method.getType()));
 538                 valueDefinitionsAst.setDerived(fullName);
 539             }
 540
 541             module.addTypeClass(classAst.name, typeClass);
 542         }
 543     }
 544
 545     private TypeTranslationContext createTypeTranslationContext() {
 546         return new TypeTranslationContext(compilationContext);
 547     }
 548
 549     public void processDerivingInstances(ArrayList<DDerivingInstanceAst> derivingInstancesAst,
 550             ArrayList<ProcessedDInstanceAst> instancesAst) {
 551         for(DDerivingInstanceAst derivingInstance : derivingInstancesAst) {
 552             String name = derivingInstance.name.name;
 553             TCon con;
 554             try {
 555                 con = Environments.getTypeClassName(compilationContext.environment, name);
 556             } catch (AmbiguousNameException e) {
 557                 errorLog.log(derivingInstance.name.location, e.getMessage());
 558                 continue;
 559             }
 560             if(con == null) {
 561                 errorLog.log(derivingInstance.name.location, "Couldn't resolve class " + name + ".");
 562                 continue;
 563             }
 564             InstanceDeriver deriver = InstanceDerivers.get(con);
 565             if(deriver == null)
 566                 errorLog.log(derivingInstance.location, "Doesn't know how to derive " + name + ".");
 567             else
 568                 deriver.derive(errorLog, compilationContext.environment, instancesAst, derivingInstance);
 569         }
 570     }
 571
 572     public void processInstances(ArrayList<ProcessedDInstanceAst> instancesAst) {
 573         THashSet<TPred> instanceClashCheckSet = new THashSet<TPred>();
 574         for(ProcessedDInstanceAst pInstanceAst : instancesAst) {
 575             DInstanceAst instanceAst = pInstanceAst.orig;
 576             try {
 577                 TypeTranslationContext context = createTypeTranslationContext();
 578
 579                 String name = instanceAst.name.name;
 580                 TCon typeClassCon;
 581                 try {
 582                     typeClassCon = Environments.getTypeClassName(compilationContext.environment, name);
 583                 } catch (AmbiguousNameException e) {
 584                     errorLog.log(instanceAst.name.location, e.getMessage());
 585                     continue;
 586                 }
 587                 if(typeClassCon == null) {
 588                     errorLog.log(instanceAst.name.location, "Couldn't resolve class " + name + ".");
 589                     continue;
 590                 }
 591                 TypeClass typeClass = compilationContext.environment.getTypeClass(typeClassCon);
 592                 pInstanceAst.typeClass = typeClass;
 593
 594                 if(instanceAst.types.length != typeClass.parameters.length) {
 595                     errorLog.log(instanceAst.location, "Wrong number of parameters to type class " + typeClassCon.name + ".");
 596                     continue;
 597                 }
 598                 Type[] parameters = new Type[instanceAst.types.length];
 599                 for(int i=0;i<parameters.length;++i)
 600                     parameters[i] = context.toType(instanceAst.types[i], typeClass.parameters[i].getKind() /* FIXME */);
 601                 TPred instance = Types.pred(typeClassCon, parameters);
 602
 603                 if(!instanceClashCheckSet.add(instance)) {
 604                     errorLog.log(instanceAst.location, "Duplicate definition of the instance " + instance + ".");
 605                     continue;
 606                 }
 607
 608                 TPred[] instanceContext = new TPred[instanceAst.context.length];
 609                 for(int i=0;i<instanceContext.length;++i)
 610                     instanceContext[i] = context.toTFuncApply(instanceAst.context[i]);
 611
 612                 String javaName = compilationContext.namingPolicy.getInstanceClassName(instance);
 613                 String instancePrefix = instance.toName() + "$";
 614
 615                 ValueRepository valueDefs = pInstanceAst.valueDefs;
 616
 617                 THashMap<String, MethodImplementation> methodImplementations =
 618                         new THashMap<String, MethodImplementation>();
 619                 for(String valueName : valueDefs.getValueNames()) {
 620                     String fullName = instancePrefix + valueName;
 621                     long loc = valueDefs.getDefinition(valueName).get(0).location;
 622                     valueDefinitionsAst.addFrom(valueDefs, valueName, fullName);
 623                     valueDefinitionsAst.setDerived(fullName);
 624                     /*valueDefinitionsAst.addAnnotation(fullName, new DAnnotationAst(new EVar("@private"),
 625                             Collections.<Expression>emptyList()));*/
 626                     TypeClassMethod method = typeClass.methods.get(valueName);
 627                     if(method == null) {
 628                         errorLog.log(loc, "Method " + valueName + " is not defined in the type class " + typeClass.name.name + ".");
 629                         continue;
 630                     }
 631                     Type type = method.getBaseType().replace(typeClass.parameters, parameters);
 632                     for(int i=instanceContext.length-1;i>=0;--i)
 633                         type = Types.constrained(instanceContext[i], type);
 634                     //System.out.println(valueName + " :: " + type);
 635                     supplementedTypeAnnotations.add(
 636                             new SupplementedValueType(loc, fullName, type));
 637                     methodImplementations.put(valueName,
 638                             new MethodImplementation(Name.create(moduleName, fullName), false));
 639                 }
 640
 641                 // Are all necessary methods defined
 642                 for(String methodName : typeClass.methods.keySet())
 643                     if(!methodImplementations.containsKey(methodName)) {
 644                         Name defaultImplementation = typeClass.methods.get(methodName).getDefaultImplementation();
 645                         if(defaultImplementation == null)
 646                             errorLog.log(instanceAst.location, "Method " + methodName + " is not defined.");
 647                         else
 648                             methodImplementations.put(methodName,
 649                                     new MethodImplementation(defaultImplementation, true));
 650                     }
 651
 652                 JavaTypeInstanceConstructor generator = new JavaTypeInstanceConstructor(javaName, instance, instanceContext);
 653                 if(instanceContext.length == 0)
 654                     generator.setHasStaticInstance(true);
 655
 656                 TypeClassInstance typeClassInstance =
 657                         new TypeClassInstance(instanceAst.location, typeClass, generator,
 658                                 generator.getTypeParameters(),
 659                                 instanceContext, instance, methodImplementations,
 660                                 javaName);
 661
 662                 generator.setInstance(typeClassInstance);
 663
 664                 module.addTypeClassInstance(typeClassCon, typeClassInstance);
 665             } catch(RuntimeException e) {
 666                 errorLog.setExceptionPosition(instanceAst.location);
 667                 throw e;
 668             }
 669         }
 670
 671         // Generate superclass functions
 672         for(ArrayList<TypeClassInstance> instanceArray : module.getTypeInstances().values())
 673             for(TypeClassInstance instance : instanceArray) {
 674                 try {
 675                     TypeClass typeClass = instance.typeClass;
 676                     int superCount = typeClass.context.length;
 677
 678                     instance.superExpressions = new SCLValue[superCount];
 679                     for(int i=0;i<superCount;++i) {
 680                         TPred type = (TPred)typeClass.context[i]
 681                                 .replace(typeClass.parameters, instance.instance.parameters);
 682                         SCLValue value = new SCLValue(Name.create(moduleName,
 683                                 instance.javaName.substring(instance.javaName.indexOf('$')+1) + "_super" + i));
 684                         //value.addProperty(PrivateProperty.INSTANCE);
 685                         module.addValue(value);
 686                         Expression expression = new EGetConstraint(instance.location, type);
 687                         value.setExpression(expression);
 688                         value.setType(Types.forAll(instance.generatorParameters, Types.constrained(instance.context, type)));
 689                         value.getProperties().add(new InlineProperty(instance.context.length, 0xffffffff));
 690                         //TypeUnparsingContext tuc = new TypeUnparsingContext();
 691                         // TODO error handling
 692                         instance.superExpressions[i] = value;
 693                     }
 694                 } catch(RuntimeException e) {
 695                     errorLog.setExceptionPosition(instance.getLocation());
 696                     throw e;
 697                 }
 698             }
 699     }
 700
 701     public void processJavaMethods(ArrayList<JavaMethodDeclaration> javaMethodDeclarations) {
 702         for(JavaMethodDeclaration javaMethod : javaMethodDeclarations) {
 703             String name = javaMethod.methodName.name;
 704             String javaName = name;
 705             ArrayList<DAnnotationAst> annotations =
 706                     valueDefinitionsAst.getAnnotations(name);
 707             boolean isPrivate = false;
 708             if(annotations != null) {
 709                 for(DAnnotationAst annotation : annotations)
 710                     if(annotation.id.text.equals("@JavaName")) {
 711                         String temp = AnnotationUtils.processStringAnnotation(errorLog, annotation);
 712                         if(temp != null)
 713                             javaName = temp;
 714                     }
 715                     else if(annotation.id.text.equals("@private")) {
 716                         AnnotationUtils.processTagAnnotation(errorLog, annotation);
 717                         isPrivate = true;
 718                     }
 719             }
 720             if(exportMap != null)
 721                 isPrivate = exportMap.remove(name) == null;
 722
 723             Type type = createTypeTranslationContext().toType(javaMethod.type);
 724
 725             CallJava callJava = resolveMethod(
 726                     javaMethod.location,
 727                     javaMethod.className,
 728                     javaName,
 729                     type);
 730             if(callJava != null) {
 731                 NameExistenceChecks.checkIfValueExists(errorLog, javaMethod.location,
 732                         importedEnvironment, module, name);
 733                 SCLValue value = module.addValue(name, callJava);
 734                 value.definitionLocation = javaMethod.methodName.location;
 735                 if(isPrivate)
 736                     value.addProperty(PrivateProperty.INSTANCE);
 737             }
 738         }
 739     }
 740
 741     public void processRulesets(ArrayList<DRulesetAst> rulesetsAst) {
 742         for(DRulesetAst ruleset : rulesetsAst) {
 743             String constructorName = "create" + ruleset.name;
 744             supplementedTypeAnnotations.add(new SupplementedValueType(ruleset.location, constructorName, Types.functionE(Types.PUNIT, Types.PROC, ruleset.type)));
 745             try {
 746                 valueDefinitionsAst.add(new DValueAst(new EVar(constructorName), new EPreCHRRulesetConstructor(ruleset)));
 747             } catch (NotPatternException e) {
 748                 throw new InternalCompilerError(ruleset.location, e);
 749             }
 750         }
 751     }
 752
 753     /**
 754      * Convert a java class method into a {@link CallJava} instance.
 755      * Compilation errors are logged for failures in finding the named class or in accessing the method.
 756      * The return value for errors is {@code null}.
 757      *
 758      * @param loc  SCL source location
 759      * @param className  Name of the class
 760      * @param methodName  Name of the method
 761      * @param type  The expected SCL type of the method
 762      * @return  A new JavaCall instance, or null if the given method can not be instantiated.
 763      */
 764     private CallJava resolveMethod(long loc,
 765             String className, String methodName, Type type) {
 766         // Resolve class
 767         ClassRef classRef = classRefs.get(className);
 768         if(classRef == null) {
 769             if(classRefs.containsKey(className))
 770                 return null;
 771             classRef = javaReferenceValidator.getClassRef(className);
 772             classRefs.put(className, classRef);
 773             if(classRef == null) {
 774                 errorLog.log(loc, "Didn't find class " + className + ".");
 775                 return null;
 776             }
 777             if(!javaReferenceValidator.isPublic(classRef.getClass())) {
 778                 errorLog.log(loc, "Class " + className + " is not public.");
 779                 return null;
 780             }
 781
 782         }
 783
 784         // Resolve method
 785         List<MethodRef> methodRefs = classRef.getMethodRefs(methodName);
 786         if(methodRefs.isEmpty()) {
 787             errorLog.log(loc, "Didn't find any public method or field with name '" + methodName + "' from class " + className + ".");
 788             return null;
 789         }
 790
 791         ArrayList<CallJava> candidates = new ArrayList<CallJava>(2);
 792         for(MethodRef methodRef : methodRefs) {
 793             CallJava candidate = matchType(methodRef, type);
 794             if(candidate != null)
 795                 candidates.add(candidate);
 796         }
 797
 798         if(candidates.isEmpty()) {
 799             StringBuilder b = new StringBuilder();
 800             b.append("Didn't find any public method or field matching the type " + type + ". The following methods and fields were tried:");
 801             for(MethodRef methodRef : methodRefs) {
 802                 b.append("\n    ");
 803                 b.append(methodRef);
 804             }
 805             b.append("\nbut expected something like:");
 806             {
 807                 MultiFunction mFun = Types.matchFunction(type);
 808                 b.append("\n    public static ");
 809                 b.append(javaTypeTranslator.toTypeDesc(mFun.returnType).getFullName()).append(' ').append(methodName).append('(');
 810                 boolean first = true;
 811                 for(Type parameter : mFun.parameterTypes) {
 812                     if(first)
 813                         first = false;
 814                     else
 815                         b.append(", ");
 816                     b.append(javaTypeTranslator.toTypeDesc(parameter).getFullName());
 817                 }
 818                 b.append(')');
 819             }
 820             errorLog.log(loc, b.toString());
 821             return null;
 822         }
 823         else if(candidates.size() == 1)
 824             return candidates.get(0);
 825         else {
 826             // Try to find the best match
 827             ArrayList<CallJava> bestCandidates = new ArrayList<CallJava>(candidates.size());
 828             loop: for(CallJava candidate : candidates) {
 829                 Iterator<CallJava> it = bestCandidates.iterator();
 830                 while(it.hasNext()) {
 831                     CallJava b = it.next();
 832                     switch(candidate.compareTo(javaReferenceValidator, b)) {
 833                     case CallJava.LESS:
 834                     case CallJava.EQUAL:
 835                         continue loop;
 836                     case CallJava.GREATER:
 837                         it.remove();
 838                         break;
 839                     case CallJava.INCOMPARABLE:
 840                         break;
 841                     }
 842                 }
 843                 bestCandidates.add(candidate);
 844             }
 845
 846             if(bestCandidates.size() == 1) {
 847                 // System.out.println("Choose: " + bestCandidates.get(0).getMethodRef());
 848                 return bestCandidates.get(0);
 849             }
 850             else {
 851                 StringBuilder b = new StringBuilder();
 852                 b.append("Found more than one incomparable public methods the type " + type + ":");
 853                 for(CallJava callJava : bestCandidates) {
 854                     b.append("\n    ");
 855                     b.append(callJava.getMethodRef());
 856                 }
 857                 errorLog.log(loc, b.toString());
 858                 return null;
 859             }
 860         }
 861     }
 862
 863     private CallJava matchType(MethodRef methodRef, Type type) {
 864         //System.out.println("-----------------------------------------------------");
 865         //System.out.println("method: " + methodRef);
 866         //System.out.println("type: " + type);
 867
 868         type = Types.canonical(type);
 869         while(type instanceof TForAll)
 870             type = Types.canonical(((TForAll)type).type);
 871
 872         TypeDesc[] expectedParameterTypes = methodRef.getParameterTypes();
 873
 874         ArrayList<Type> parameterTypes = new ArrayList<Type>();
 875         Type effect = Types.NO_EFFECTS;
 876         Type returnType = type;
 877
 878         StackItem[] stackItems = new StackItem[expectedParameterTypes.length];
 879         TIntArrayList unresolvedItems = new TIntArrayList();
 880
 881         loop:
 882         for(int i=0;i<expectedParameterTypes.length;++i) {
 883             Type parameterType;
 884             TypeDesc providedParameterType;
 885             do {
 886                 if(effect != Types.NO_EFFECTS || !(returnType instanceof TFun)) {
 887                     while(i < expectedParameterTypes.length)
 888                         unresolvedItems.add(i++);
 889                     break loop;
 890                 }
 891                 TFun fun = (TFun)returnType;
 892                 parameterType = Types.canonical(fun.domain);
 893                 parameterTypes.add(parameterType);
 894                 effect = Types.canonical(fun.effect);
 895                 returnType = Types.canonical(fun.range);
 896                 providedParameterType = javaTypeTranslator.toTypeDesc(parameterType);
 897             } while(providedParameterType.equals(TypeDesc.VOID));
 898
 899             while(true) {
 900                 TypeDesc expectedParameterType = expectedParameterTypes[i];
 901                 if(javaReferenceValidator.isAssignableFrom(expectedParameterType,
 902                         providedParameterType)) {
 903                     stackItems[i] = new ParameterStackItem(
 904                             parameterTypes.size()-1,
 905                             parameterType);
 906                     break;
 907                 }
 908                 else
 909                     unresolvedItems.add(i++);
 910                 if(i == expectedParameterTypes.length) {
 911                     parameterTypes.remove(parameterTypes.size()-1);
 912                     returnType = Types.functionE(parameterType, effect, returnType);
 913                     break;
 914                 }
 915             }
 916         }
 917         //System.out.println("returnType: " + returnType);
 918         if(!unresolvedItems.isEmpty()) {
 919             ArrayList<TCon> concreteEffects = new ArrayList<TCon>();
 920             effect.collectConcreteEffects(concreteEffects);
 921
 922             for(TCon eff : concreteEffects) {
 923                 EffectConstructor effC = compilationContext.environment.getEffectConstructor(eff);
 924                 for(ThreadLocalVariable var : effC.getThreadLocalVariables()) {
 925                     for(int i=0;i<unresolvedItems.size();++i) {
 926                         int id = unresolvedItems.get(i);
 927                         if(!expectedParameterTypes[id].equals(TypeDesc.OBJECT) &&
 928                                 javaReferenceValidator.isAssignableFrom(expectedParameterTypes[id], var.type)) {
 929                             stackItems[id] = new ThreadLocalStackItem(var.variableName, var.type);
 930                             unresolvedItems.removeAt(i);
 931                             --i;
 932                         }
 933                     }
 934                 }
 935             }
 936
 937             if(!unresolvedItems.isEmpty())
 938                 return null;
 939             /*System.out.print("Unresolved: ");
 940             boolean first = true;
 941             for(int i=0;i<unresolvedItems.size();++i) {
 942                 if(first)
 943                     first = false;
 944                 else
 945                     System.out.print(", ");
 946                 System.out.print(expectedParameterTypes[unresolvedItems.get(i)]);
 947             }
 948             System.out.println();*/
 949         }
 950         OutputFilter filter = null;
 951         {
 952             TypeDesc providedReturnType = methodRef.getReturnType();
 953             if(!providedReturnType.equals(Constants.FUNCTION)) {
 954                 while(returnType instanceof TFun && effect == Types.NO_EFFECTS) {
 955                     TFun fun = (TFun)returnType;
 956                     Type parameterType = Types.canonical(fun.domain);
 957                     if(!javaTypeTranslator.toTypeDesc(parameterType).equals(TypeDesc.VOID))
 958                         return null;
 959                     parameterTypes.add(parameterType);
 960                     effect = Types.canonical(fun.effect);
 961                     returnType = Types.canonical(fun.range);
 962                 }
 963             }
 964             TypeDesc expectedReturnType =
 965                     javaTypeTranslator.toTypeDesc(returnType);
 966             if(!javaReferenceValidator.isAssignableFrom(expectedReturnType,
 967                     providedReturnType)) {
 968                 if(expectedReturnType.equals(TypeDesc.VOID)) {
 969                     if(providedReturnType.equals(TypeDesc.DOUBLE) || providedReturnType.equals(TypeDesc.LONG))
 970                         filter = Pop2OutputFilter.INSTANCE;
 971                     else
 972                         filter = PopOutputFilter.INSTANCE;
 973                 }
 974                 else if(expectedReturnType.equals(Constants.LIST)
 975                         && providedReturnType.equals(Constants.COLLECTION))
 976                     filter = ConvertToListFilter.INSTANCE;
 977                 else
 978                     return null;
 979             }
 980         }
 981
 982         CallJava result = new CallJava(
 983                 Types.freeVarsArray(type),
 984                 effect,
 985                 returnType,
 986                 parameterTypes.toArray(new Type[parameterTypes.size()]),
 987                 stackItems,
 988                 methodRef,
 989                 filter);
 990         //System.out.println(result.getType());
 991         return result;
 992     }
 993
 994     public void processMappingRelations(ArrayList<DMappingRelationAst> mappingRelationsAst) {
 995         for(DMappingRelationAst mappingRelation : mappingRelationsAst) {
 996             TypeAst[] parameterTypesAst = mappingRelation.parameterTypes;
 997             Type[] parameterTypes = new Type[parameterTypesAst.length];
 998             TypeTranslationContext typeTranslationContext = createTypeTranslationContext();
 999             for(int i=0;i<parameterTypes.length;++i)
1000                 parameterTypes[i] = parameterTypesAst[i].toType(typeTranslationContext, Kinds.STAR);
1001             MappingRelation mRel =
1002                     new MappingRelation(Name.create(moduleName, mappingRelation.name), parameterTypes);
1003             mRel.location = mappingRelation.location;
1004             if(module.addMappingRelation(mRel))
1005                 errorLog.log(mappingRelation.location, "Mapping relation " + mappingRelation.name +
1006                         " has already been defined.");
1007         }
1008     }
1009
1010     THashMap<String, DRuleAst> ruleAstMap = new THashMap<String, DRuleAst>();
1011
1012     public void processRules(ArrayList<DRuleAst> rulesAst) {
1013         // Find implied mapping relations
1014         for(DRuleAst ruleA : rulesAst) {
1015             ArrayList<Query> whereSection = ruleA.getSections().get("where");
1016             if(whereSection != null)
1017                 for(Query query : whereSection) {
1018                     if(!(query instanceof QPreGuard))
1019                         continue;
1020                     QPreGuard guard = (QPreGuard)query;
1021                     if(!(guard.guard instanceof EApply))
1022                         continue;
1023                     EApply apply = (EApply)guard.guard;
1024                     if(!(apply.getFunction() instanceof EVar))
1025                         continue;
1026
1027                     String name = ((EVar)apply.getFunction()).name;
1028                     if(module.getMappingRelation(name) != null)
1029                         continue;
1030
1031                     int arity = apply.getParameters().length;
1032                     Type[] parameterTypes = new Type[arity];
1033                     for(int i=0;i<arity;++i)
1034                         parameterTypes[i] = Types.metaVar(Kinds.STAR);
1035                     MappingRelation mRel =
1036                             new MappingRelation(Name.create(moduleName, name), parameterTypes);
1037                     mRel.location = query.location;
1038                     module.addMappingRelation(mRel);
1039                 }
1040             if(ruleAstMap.put(ruleA.name, ruleA) != null)
1041                 errorLog.log(ruleA.location, "Rule " + ruleA.name +
1042                         " has already been defined.");
1043         }
1044
1045         //
1046         for(String ruleName : ruleAstMap.keySet())
1047             processRule(ruleName);
1048     }
1049
1050     private TransformationRule processRule(String ruleName) {
1051         TransformationRule rule = module.getRule(ruleName);
1052         if(rule != null)
1053             return rule;
1054
1055         DRuleAst ruleAst = ruleAstMap.get(ruleName);
1056         if(ruleAst.alreadyProcessing) {
1057             errorLog.log(ruleAst.location, "Cyclic chain of rule extensions.");
1058             return null;
1059         }
1060
1061         TransformationRule[] extendsRules;
1062         int length = ruleAst.extendsNames.length;
1063         if(length == 0)
1064             extendsRules = TransformationRule.EMPTY_ARRAY;
1065         else {
1066             extendsRules = new TransformationRule[length];
1067             for(int i=0;i<length;++i) {
1068                 try {
1069                     String extendsName = ruleAst.extendsNames[i];
1070                     TransformationRule extendsRule;
1071                     if(ruleAstMap.containsKey(extendsName))
1072                         extendsRule = processRule(extendsName);
1073                     else {
1074                         extendsRule = Environments.getRule(compilationContext.environment, extendsName);
1075                         if(extendsRule == null)
1076                             errorLog.log(ruleAst.location,
1077                                     "Couldn't resolve rule name " + extendsName + ".");
1078                     }
1079                     extendsRules[i] = extendsRule;
1080                 } catch(AmbiguousNameException e) {
1081                     errorLog.log(ruleAst.location, e.getMessage());
1082                 }
1083             }
1084         }
1085
1086         final THashMap<SectionName, Query[]> sections = new THashMap<SectionName, Query[]>();
1087
1088         final TranslationContext context = createTranslationContext(ruleName);
1089         if(length > 0) {
1090             THashMap<String, Variable> variables = context.getVariables();
1091             for(TransformationRule extendsRule : extendsRules) {
1092                 if(extendsRule == null)
1093                     continue;
1094                 for(Variable var : extendsRule.variables)
1095                     if(variables.put(var.getName(), var) != null) {
1096                         errorLog.log(ruleAst.location,
1097                                 "Variable " + var.getName() + " is defined in more than one base rule, which is not currently allowed.");
1098                     }
1099             }
1100         }
1101         context.pushExistentialFrame();
1102         ruleAst.getSections().forEachEntry(new TObjectObjectProcedure<String, ArrayList<Query>>() {
1103             @Override
1104             public boolean execute(String sectionNameString, ArrayList<Query> queries) {
1105                 Query[] resolvedQueries = new Query[queries.size()];
1106                 for(int i=0;i<resolvedQueries.length;++i)
1107                     resolvedQueries[i] = queries.get(i).resolve(context);
1108
1109                 SectionName sectionName = SectionName.getSectionName(sectionNameString);
1110                 if(sectionName == null)
1111                     context.getErrorLog().log(queries.get(0).location,
1112                             "Invalid section name " + sectionNameString + ".");
1113                 else
1114                     sections.put(sectionName, resolvedQueries);
1115                 return true;
1116             }
1117         });
1118
1119         Variable[] variables = context.getVariables().values().toArray(new Variable[context.getVariables().size()]);
1120
1121         rule = new TransformationRule(ruleAst.isAbstract,
1122                 Name.create(moduleName, ruleAst.name),
1123                 extendsRules,
1124                 sections, variables);
1125         rule.location = ruleAst.location;
1126         module.addRule(rule);
1127         return rule;
1128     }
1129
1130     public void addDataTypesToEnvironment() {
1131         for(StandardTypeConstructor dataType : dataTypes) {
1132             int constructorTag = 0;
1133             for(Constructor constructor : dataType.constructors) {
1134                 SCLValue value = new SCLValue(constructor.name);
1135                 value.parameterNames = constructor.recordFieldNames;
1136                 value.definitionLocation = constructor.loc;
1137                 SCLConstructor sclConstructor =
1138                         new SCLConstructor(
1139                                 constructor.name.name,
1140                                 constructor.javaName,
1141                                 constructor.getTypeVariables(),
1142                                 constructorTag++,
1143                                 constructor.getReturnType(),
1144                                 constructor.componentAccesses == null
1145                                         ? SCLConstructor.DEFAULT_FIELD_NAMES[constructor.getParameterTypes().length]
1146                                         : constructor.componentAccesses,
1147                                 constructor.getParameterTypes());
1148                 if(dataType.constructors.length == 1 && (
1149                         dataType.getTypeDesc() == null ||
1150                         (dataType.constructors[0].javaName != null &&
1151                         dataType.constructors[0].javaName.equals(MethodBuilderBase.getClassName(dataType.getTypeDesc())))))
1152                     sclConstructor.setOnlyConstructor(true);
1153                 value.setValue(sclConstructor);
1154                 value.setType(constructor.getType());
1155
1156                 NameExistenceChecks.checkIfValueExists(errorLog, constructor.loc,
1157                         importedEnvironment, module, constructor.name.name);
1158                 if(module.addValue(value)) {
1159                     errorLog.log(constructor.loc,
1160                             "Value " + constructor.name.name + " is already defined.");
1161                 }
1162             }
1163         }
1164     }
1165
1166     public void addTypeClassesToEnvironment() {
1167         for(TypeClass typeClass : module.getTypeClasses()) {
1168             for(TypeClassMethod method : typeClass.methods.values()) {
1169                 SCLValue value = method.createValue();
1170                 value.definitionLocation = method.location;
1171                 NameExistenceChecks.checkIfValueExists(errorLog, Locations.NO_LOCATION,
1172                         importedEnvironment, module, value.getName().name);
1173
1174                 if(module.addValue(value)) {
1175                     String name = method.getName();
1176                     long location = Locations.NO_LOCATION;
1177                     ArrayList<DValueAst> definitions = valueDefinitionsAst.getDefinition(name);
1178                     if(definitions != null && !definitions.isEmpty())
1179                         location = definitions.get(0).location;
1180                     errorLog.log(location, "Value " + name + " is already defined.");
1181                 }
1182             }
1183         }
1184     }
1185
1186     public void preprocessValueDefinitions(ArrayList<DValueTypeAst> typeAnnotationsAst) {
1187         for(String name : valueDefinitionsAst.getValueNames()) {
1188             SCLValue value = new SCLValue(Name.create(moduleName, name));
1189
1190             long location = valueDefinitionsAst.getLocation(name);
1191             NameExistenceChecks.checkIfValueExists(errorLog, location,
1192                     importedEnvironment, module, value.getName().name);
1193             value.definitionLocation = location;
1194             if(module.addValue(value))
1195                 errorLog.log(location, "Value " + name + " is already defined.");
1196             if(valueDefinitionsAst.isDerived(name))
1197                 value.addProperty(DerivedProperty.INSTANCE);
1198         }
1199         for(DValueTypeAst valueTypeAst : typeAnnotationsAst)
1200             for(EVar name : valueTypeAst.names) {
1201                 SCLValue value = module.getValue(name.name);
1202                 if(value == null) {
1203                     errorLog.log(valueTypeAst.location, name.name + " is not defined.");
1204                     value = new SCLValue(Name.create(moduleName, name.name));
1205                     module.addValue(value);
1206                 }
1207                 value.definitionLocation = name.location;
1208             }
1209         for(String name : relationDefinitionsAst.getRelationNames()) {
1210             ConcreteRelation relation = new ConcreteRelation(name);
1211             module.addRelation(name, relation);
1212         }
1213     }
1214
1215     public void addValueDefinitionsToEnvironment(ArrayList<DValueTypeAst> typeAnnotationsAst) {
1216         THashMap<String, DValueTypeAst> typeMap = new THashMap<String, DValueTypeAst>();
1217         for(DValueTypeAst valueTypeAst : typeAnnotationsAst)
1218             for(EVar name : valueTypeAst.names) {
1219                 if(typeMap.containsKey(name.name))
1220                     errorLog.log(valueTypeAst.location, "Type of "+name.name+" has already been declared in this module.");
1221                 else
1222                     typeMap.put(name.name, valueTypeAst);
1223             }
1224
1225         for(String name : valueDefinitionsAst.getValueNames()) {
1226             ArrayList<DValueAst> defs = valueDefinitionsAst.getDefinition(name);
1227             if(defs.size() != 1 || !(defs.get(0).value instanceof EPreCHRRulesetConstructor))
1228                 continue;
1229             try {
1230                 SCLValue value = module.getValue(name);
1231                 TranslationContext context = createTranslationContext(name);
1232                 Expression expression = context.translateCases2(defs);
1233                 value.setExpression(expression);
1234
1235                 if(exportMap != null && exportMap.remove(name) == null)
1236                     value.addProperty(PrivateProperty.INSTANCE);
1237             } catch(RuntimeException e) {
1238                 errorLog.setExceptionPosition(defs.get(0).location);
1239                 throw e;
1240             }
1241         }
1242         for(String name : valueDefinitionsAst.getValueNames()) {
1243             ArrayList<DValueAst> defs = valueDefinitionsAst.getDefinition(name);
1244             if(defs.size() == 1 && defs.get(0).value instanceof EPreCHRRulesetConstructor)
1245                 continue;
1246             try {
1247                 SCLValue value = module.getValue(name);
1248                 TranslationContext context = createTranslationContext(name);
1249                 Expression expression = context.translateCases2(defs);
1250                 value.setExpression(expression);
1251
1252                 DValueTypeAst valueTypeAst = typeMap.remove(name);
1253                 if(valueTypeAst != null)
1254                     value.setType(Types.closure(context.toType(valueTypeAst.type)));
1255
1256                 ArrayList<DAnnotationAst> annotations = valueDefinitionsAst.getAnnotations(name);
1257                 if(annotations != null)
1258                     for(DAnnotationAst annotation : annotations) {
1259                         handleAnnotation(value, defs, annotation);
1260                     }
1261                 if(exportMap != null && exportMap.remove(name) == null)
1262                     value.addProperty(PrivateProperty.INSTANCE);
1263             } catch(RuntimeException e) {
1264                 errorLog.setExceptionPosition(defs.get(0).location);
1265                 throw e;
1266             }
1267         }
1268         for(String name : relationDefinitionsAst.getRelationNames()) {
1269             ArrayList<DRelationAst> definitions = relationDefinitionsAst.getDefinition(name);
1270             if(definitions.size() > 1) {
1271                 errorLog.log(definitions.get(1).location,
1272                         "Does not yet support definition of relations by more than one rule.");
1273                 continue;
1274             }
1275
1276             DRelationAst definition = definitions.get(0);
1277             ConcreteRelation relation = (ConcreteRelation)module.getRelation(name);
1278             relation.location = definition.location;
1279             TranslationContext context = createTranslationContext(name);
1280             definition.translateTo(context, relation);
1281         }
1282     }
1283
1284     private TranslationContext createTranslationContext(String definitionName) {
1285         return new TranslationContext(compilationContext, null, definitionName);
1286     }
1287
1288     private void handleAnnotation(SCLValue value, ArrayList<DValueAst> defs, DAnnotationAst annotation) {
1289         if(annotation.id.text.equals("@macro")) {
1290             value.setMacroRule(new StandardMacroRule());
1291         }
1292         else if(annotation.id.text.equals("@inline")) {
1293             try {
1294                 int arity = defs.get(0).lhs.getFunctionDefinitionPatternArity();
1295                 int phaseMask = 0xffffffff;
1296                 if(annotation.parameters.length > 0) {
1297                     phaseMask = Integer.parseInt(((EIntegerLiteral)annotation.parameters[0]).getValue());
1298                 }
1299                 value.addProperty(new InlineProperty(arity, phaseMask));
1300             } catch(NotPatternException e) {
1301                 errorLog.log(annotation.location, "Inline annotation is invalid: this is not a function.");
1302             }
1303         }
1304         else if(annotation.id.text.equals("@private")) {
1305             if(moduleHeader != null && moduleHeader.export != null)
1306                 errorLog.log(annotation.location, "Annotation @private is not used when module header contains export property.");
1307             value.addProperty(PrivateProperty.INSTANCE);
1308         }
1309         else if(annotation.id.text.equals("@deprecated")) {
1310             String description = "";
1311             if(annotation.parameters.length > 0) {
1312                 if(annotation.parameters.length > 1)
1313                     errorLog.log(annotation.location, "Invalid number of parameters, expected one string.");
1314                 else {
1315                     String temp = AnnotationUtils.extractString(annotation.parameters[0]);
1316                     if(temp == null)
1317                         errorLog.log(annotation.location, "Invalid parameter, expected one string.");
1318                     else
1319                         description = temp;
1320                 }
1321             }
1322             value.addProperty(new DeprecatedProperty(description));
1323         }
1324         else
1325             errorLog.log(annotation.location, "Unknown annotation.");
1326     }
1327
1328     public void addSupplementedTypeAnnotationsToEnvironment() {
1329         for(SupplementedValueType valueType : supplementedTypeAnnotations) {
1330             Type type = Types.closure(valueType.type);
1331             String name = valueType.name;
1332             SCLValue value = module.getValue(name);
1333             if(value == null)
1334                 errorLog.log(valueType.position,
1335                         name + " is not defined.");
1336             else if(value.getType()==null)
1337                 value.setType(type);
1338             else
1339                 errorLog.log(valueType.position,
1340                         "Type of "+name+" has already been declared in this module.");
1341         }
1342     }
1343
1344     public void addFixityToEnvironment(ArrayList<DFixityAst> fixityAst) {
1345         for(DFixityAst fixity : fixityAst) {
1346             for(EVar symbol : fixity.symbols) {
1347                 String name = symbol.name;
1348                 SCLValue value = module.getValue(name);
1349                 if(value == null)
1350                     errorLog.log(symbol.location,
1351                             name + " is not defined.");
1352                 else
1353                     value.setPrecedence(fixity.precedence);
1354             }
1355         }
1356     }
1357
1358     public void addCoverageBranchPoints() {
1359         branchPoints = new THashMap<String, BranchPoint[]>();
1360         BranchPointInjector injector = new BranchPointInjector();
1361         for(String valueName : valueDefinitionsAst.getValueNames()) {
1362             for(DValueAst valueAst : valueDefinitionsAst.getDefinition(valueName))
1363                 valueAst.value = injector.injectBranchPoint(valueAst.value);
1364             branchPoints.put(valueName, injector.getAndClearBranchPoints());
1365         }
1366     }
1367
1368     public void collectDebugInfo() {
1369         module.moduleDebugInfo = compilationContext.moduleDebugInfo = new ModuleDebugInfo();
1370     }
1371
1372     public void prepareExports() {
1373         if(moduleHeader != null && moduleHeader.export != null) {
1374             exportMap = new THashMap<String, EVar>();
1375             for(EVar export : moduleHeader.export)
1376                 if(exportMap.put(export.name, export) != null)
1377                     errorLog.log(export.location, "The symbol " + export.name + " is exported multiple times.");
1378         }
1379     }
1380
1381     public void checkExports() {
1382         if(exportMap != null)
1383             for(EVar export : exportMap.values())
1384                     errorLog.log(export.location, "The symbol " + export.name + " is not defined in the module.");
1385     }
1386 }