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