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