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.names.Name;
  10 import org.simantics.scl.compiler.constants.JavaTypeInstanceConstructor;
  11 import org.simantics.scl.compiler.constants.SCLConstructor;
  12 import org.simantics.scl.compiler.constants.StringConstant;
  13 import org.simantics.scl.compiler.constants.generic.CallJava;
  14 import org.simantics.scl.compiler.constants.generic.ClassRef;
  15 import org.simantics.scl.compiler.constants.generic.ConvertToListFilter;
  16 import org.simantics.scl.compiler.constants.generic.MethodRef;
  17 import org.simantics.scl.compiler.constants.generic.OutputFilter;
  18 import org.simantics.scl.compiler.constants.generic.ParameterStackItem;
  19 import org.simantics.scl.compiler.constants.generic.PopOutputFilter;
  20 import org.simantics.scl.compiler.constants.generic.StackItem;
  21 import org.simantics.scl.compiler.constants.generic.ThreadLocalStackItem;
  22 import org.simantics.scl.compiler.elaboration.contexts.TranslationContext;
  23 import org.simantics.scl.compiler.elaboration.contexts.TypeTranslationContext;
  24 import org.simantics.scl.compiler.elaboration.errors.NotPatternException;
  25 import org.simantics.scl.compiler.elaboration.expressions.EApply;
  26 import org.simantics.scl.compiler.elaboration.expressions.EGetConstraint;
  27 import org.simantics.scl.compiler.elaboration.expressions.EIntegerLiteral;
  28 import org.simantics.scl.compiler.elaboration.expressions.EListLiteral;
  29 import org.simantics.scl.compiler.elaboration.expressions.ELiteral;
  30 import org.simantics.scl.compiler.elaboration.expressions.EVar;
  31 import org.simantics.scl.compiler.elaboration.expressions.Expression;
  32 import org.simantics.scl.compiler.elaboration.expressions.Variable;
  33 import org.simantics.scl.compiler.elaboration.fundeps.Fundep;
  34 import org.simantics.scl.compiler.elaboration.java.JavaMethodDeclaration;
  35 import org.simantics.scl.compiler.elaboration.macros.StandardMacroRule;
  36 import org.simantics.scl.compiler.elaboration.modules.InlineProperty;
  37 import org.simantics.scl.compiler.elaboration.modules.MethodImplementation;
  38 import org.simantics.scl.compiler.elaboration.modules.PrivateProperty;
  39 import org.simantics.scl.compiler.elaboration.modules.SCLValue;
  40 import org.simantics.scl.compiler.elaboration.modules.TypeAlias;
  41 import org.simantics.scl.compiler.elaboration.modules.TypeClass;
  42 import org.simantics.scl.compiler.elaboration.modules.TypeClassInstance;
  43 import org.simantics.scl.compiler.elaboration.modules.TypeClassMethod;
  44 import org.simantics.scl.compiler.elaboration.query.Query;
  45 import org.simantics.scl.compiler.elaboration.query.pre.QPreGuard;
  46 import org.simantics.scl.compiler.elaboration.relations.ConcreteRelation;
  47 import org.simantics.scl.compiler.elaboration.rules.MappingRelation;
  48 import org.simantics.scl.compiler.elaboration.rules.SectionName;
  49 import org.simantics.scl.compiler.elaboration.rules.TransformationRule;
  50 import org.simantics.scl.compiler.environment.AmbiguousNameException;
  51 import org.simantics.scl.compiler.environment.Environment;
  52 import org.simantics.scl.compiler.environment.EnvironmentFactory;
  53 import org.simantics.scl.compiler.environment.Environments;
  54 import org.simantics.scl.compiler.errors.ErrorLog;
  55 import org.simantics.scl.compiler.errors.Locations;
  56 import org.simantics.scl.compiler.internal.codegen.effects.EffectConstructor;
  57 import org.simantics.scl.compiler.internal.codegen.effects.ThreadLocalVariable;
  58 import org.simantics.scl.compiler.internal.codegen.types.JavaReferenceValidator;
  59 import org.simantics.scl.compiler.internal.codegen.types.JavaTypeTranslator;
  60 import org.simantics.scl.compiler.internal.codegen.types.StandardTypeConstructor;
  61 import org.simantics.scl.compiler.internal.codegen.utils.Constants;
  62 import org.simantics.scl.compiler.internal.codegen.utils.JavaNamingPolicy;
  63 import org.simantics.scl.compiler.internal.codegen.utils.MethodBuilderBase;
  64 import org.simantics.scl.compiler.internal.deriving.InstanceDeriver;
  65 import org.simantics.scl.compiler.internal.deriving.InstanceDerivers;
  66 import org.simantics.scl.compiler.internal.elaboration.profiling.BranchPointInjector;
  67 import org.simantics.scl.compiler.internal.elaboration.utils.StronglyConnectedComponents;
  68 import org.simantics.scl.compiler.internal.parsing.declarations.ConstructorAst;
  69 import org.simantics.scl.compiler.internal.parsing.declarations.DAnnotationAst;
  70 import org.simantics.scl.compiler.internal.parsing.declarations.DClassAst;
  71 import org.simantics.scl.compiler.internal.parsing.declarations.DDataAst;
  72 import org.simantics.scl.compiler.internal.parsing.declarations.DDerivingInstanceAst;
  73 import org.simantics.scl.compiler.internal.parsing.declarations.DEffectAst;
  74 import org.simantics.scl.compiler.internal.parsing.declarations.DFixityAst;
  75 import org.simantics.scl.compiler.internal.parsing.declarations.DInstanceAst;
  76 import org.simantics.scl.compiler.internal.parsing.declarations.DMappingRelationAst;
  77 import org.simantics.scl.compiler.internal.parsing.declarations.DRelationAst;
  78 import org.simantics.scl.compiler.internal.parsing.declarations.DRuleAst;
  79 import org.simantics.scl.compiler.internal.parsing.declarations.DTypeAst;
  80 import org.simantics.scl.compiler.internal.parsing.declarations.DValueAst;
  81 import org.simantics.scl.compiler.internal.parsing.declarations.DValueTypeAst;
  82 import org.simantics.scl.compiler.internal.parsing.exceptions.SCLSyntaxErrorException;
  83 import org.simantics.scl.compiler.internal.parsing.translation.ProcessedDClassAst;
  84 import org.simantics.scl.compiler.internal.parsing.translation.ProcessedDInstanceAst;
  85 import org.simantics.scl.compiler.internal.parsing.translation.RelationRepository;
  86 import org.simantics.scl.compiler.internal.parsing.translation.ValueRepository;
  87 import org.simantics.scl.compiler.internal.parsing.types.TypeAst;
  88 import org.simantics.scl.compiler.module.ConcreteModule;
  89 import org.simantics.scl.compiler.module.ImportDeclaration;
  90 import org.simantics.scl.compiler.module.repository.ImportFailure;
  91 import org.simantics.scl.compiler.module.repository.ImportFailureException;
  92 import org.simantics.scl.compiler.types.TCon;
  93 import org.simantics.scl.compiler.types.TForAll;
  94 import org.simantics.scl.compiler.types.TFun;
  95 import org.simantics.scl.compiler.types.TPred;
  96 import org.simantics.scl.compiler.types.TVar;
  97 import org.simantics.scl.compiler.types.Type;
  98 import org.simantics.scl.compiler.types.Types;
  99 import org.simantics.scl.compiler.types.kinds.Kind;
 100 import org.simantics.scl.compiler.types.kinds.Kinds;
 101 import org.simantics.scl.compiler.types.util.MultiFunction;
 102 import org.simantics.scl.runtime.profiling.BranchPoint;
 103
 104 import gnu.trove.list.array.TIntArrayList;
 105 import gnu.trove.map.hash.THashMap;
 106 import gnu.trove.map.hash.TObjectIntHashMap;
 107 import gnu.trove.procedure.TObjectObjectProcedure;
 108 import gnu.trove.set.hash.THashSet;
 109 import gnu.trove.set.hash.TIntHashSet;
 110
 111 public class Elaboration {
 112     // inputs
 113     ErrorLog errorLog;
 114     String moduleName;
 115     ArrayList<ImportDeclaration> importsAst;
 116     JavaReferenceValidator<Object, Object, Object, Object> javaReferenceValidator;
 117     ValueRepository valueDefinitionsAst;
 118     RelationRepository relationDefinitionsAst;
 119
 120     // creates
 121     ConcreteModule module;
 122     Environment importedEnvironment;
 123     Environment environment;
 124     JavaNamingPolicy namingPolicy;
 125     ArrayList<SupplementedValueType> supplementedTypeAnnotations = new ArrayList<SupplementedValueType>();
 126
 127     JavaTypeTranslator javaTypeTranslator;
 128     ArrayList<StandardTypeConstructor> dataTypes = new ArrayList<StandardTypeConstructor>();
 129     THashMap<String, ClassRef> classRefs = new THashMap<String, ClassRef>();
 130     THashMap<String, BranchPoint[]> branchPoints;
 131
 132     @SuppressWarnings("unchecked")
 133     public Elaboration(ErrorLog errorLog, CompilationTimer timer, EnvironmentFactory localEnvironmentFactory,
 134             String moduleName, ArrayList<ImportDeclaration> importsAst,
 135             JavaReferenceValidator<?, ?, ?, ?> javaReferenceValidator,
 136             ValueRepository valueDefinitionsAst,
 137             RelationRepository relationDefinitionsAst) {
 138         this.errorLog = errorLog;
 139         this.moduleName = moduleName;
 140         importsAst = processRelativeImports(importsAst);
 141         this.importsAst = importsAst;
 142         this.javaReferenceValidator = (JavaReferenceValidator<Object, Object, Object, Object>)javaReferenceValidator;
 143         this.valueDefinitionsAst = valueDefinitionsAst;
 144         this.relationDefinitionsAst = relationDefinitionsAst;
 145
 146         module = new ConcreteModule(moduleName);
 147         try {
 148             if(timer != null)
 149                 timer.suspendTimer();
 150             importedEnvironment = localEnvironmentFactory.createEnvironment(
 151                     importsAst.toArray(new ImportDeclaration[importsAst.size()]));
 152             if(timer != null)
 153                 timer.continueTimer();
 154             this.environment = new EnvironmentOfModule(importedEnvironment, module);
 155         } catch (ImportFailureException e) {
 156             for(ImportFailure failure : e.failures)
 157                 errorLog.log(failure.location, failure.toString());
 158             return;
 159         }
 160         for(ImportDeclaration importAst : importsAst)
 161             this.module.addDependency(new ImportDeclaration(
 162                     importAst.moduleName,
 163                     importAst.reexport ? importAst.localName : null,
 164                     false,
 165                     importAst.spec));
 166         localEnvironmentFactory.addBuiltinDependencies(module);
 167         namingPolicy = new JavaNamingPolicy(moduleName);
 168     }
 169
 170     private ArrayList<ImportDeclaration> processRelativeImports(ArrayList<ImportDeclaration> relativeImports) {
 171         ArrayList<ImportDeclaration> absoluteImports = new ArrayList<ImportDeclaration>(relativeImports.size());
 172         for(ImportDeclaration relativeImport : relativeImports) {
 173             if(relativeImport.moduleName.startsWith(".")) {
 174                 String absoluteModuleName = convertRelativeModulePath(relativeImport.location, relativeImport.moduleName);
 175                 if(absoluteModuleName != null) {
 176                     ImportDeclaration absoluteImport = new ImportDeclaration(
 177                             absoluteModuleName, relativeImport.localName,
 178                             relativeImport.reexport, relativeImport.spec);
 179                     absoluteImport.location = relativeImport.location;
 180                     absoluteImports.add(absoluteImport);
 181                 }
 182             }
 183             else
 184                 absoluteImports.add(relativeImport);
 185         }
 186         return absoluteImports;
 187     }
 188
 189     private String convertRelativeModulePath(long location, String relativeModuleName) {
 190         String originalRelativeModuleName = relativeModuleName;
 191         int p = moduleName.lastIndexOf('/');
 192         String parentPackage = p < 0 ? "" : moduleName.substring(0, p);
 193         while(relativeModuleName.startsWith(".")) {
 194             if(relativeModuleName.startsWith("./")) {
 195                 relativeModuleName = relativeModuleName.substring(2);
 196             }
 197             else if(relativeModuleName.startsWith("../")) {
 198                 relativeModuleName = relativeModuleName.substring(3);
 199                 if(parentPackage.isEmpty()) {
 200                     errorLog.log(location, "Couldn't resolve the relative module name " + originalRelativeModuleName + " when the current module name is " + moduleName + ".");
 201                     return null;
 202                 }
 203                 p = parentPackage.lastIndexOf('/');
 204                 parentPackage = p < 0 ? "" : parentPackage.substring(0, p);
 205             }
 206             else {
 207                 errorLog.log(location, "Couldn't resolve the relative module name " + originalRelativeModuleName + ". It has an invalid syntax.");
 208                 return null;
 209             }
 210         }
 211         return parentPackage + "/" + relativeModuleName;
 212     }
 213
 214     public void addTypesToEnvironment(
 215             ArrayList<DDataAst> dataTypesAst,
 216             ArrayList<DTypeAst> typeAliasesAst,
 217             ArrayList<DEffectAst> effectsAst) {
 218         for(DDataAst dataType : dataTypesAst) {
 219             dataType.parameterKinds = new Kind[dataType.parameters.length];
 220             Kind constructorKind = Kinds.STAR;
 221             for(int i=dataType.parameters.length-1;i>=0;--i) {
 222                 Kind kind = Kinds.metaVar();
 223                 dataType.parameterKinds[i] = kind;
 224                 constructorKind = Kinds.arrow(kind, constructorKind);
 225             }
 226
 227             StandardTypeConstructor typeConstructor = new StandardTypeConstructor(
 228                     Types.con(moduleName, dataType.name), constructorKind);
 229
 230             NameExistenceChecks.checkIfTypeExists(errorLog,
 231                     dataType.location, importedEnvironment, dataType.name);
 232             if(module.addTypeConstructor(dataType.name, typeConstructor))
 233                 errorLog.log(dataType.location, "Type "+dataType.name+" has already been defined in this module.");
 234             dataType.typeConstructor = typeConstructor;
 235         }
 236
 237         for(DTypeAst typeAlias : typeAliasesAst) {
 238             TypeAlias alias = new TypeAlias(Types.con(moduleName, typeAlias.name), typeAlias.parameters.length);
 239             NameExistenceChecks.checkIfTypeExists(errorLog,
 240                     typeAlias.location, importedEnvironment, typeAlias.name);
 241             if(module.addTypeAlias(typeAlias.name, alias)) {
 242                 errorLog.log(typeAlias.location, "Type alias "+typeAlias.name+" has already been defined in this module.");
 243             }
 244         }
 245
 246         for(DEffectAst effect : effectsAst) {
 247             EffectConstructor effectConstructor = new EffectConstructor(Types.con(moduleName, effect.name));
 248             effectConstructor.addThreadLocalVariable(
 249                     new ThreadLocalVariable(
 250                             effect.variableName,
 251                             TypeDesc.forClass(effect.threadLocalType)
 252                             ));
 253             if(module.addEffectConstructor(effect.name, effectConstructor))
 254                 errorLog.log(effect.location, "Type "+effect.name+" has already been defined in this module.");
 255         }
 256         javaTypeTranslator = new JavaTypeTranslator(environment);
 257     }
 258
 259     private static final int[] EMPTY_INT_ARRAY = new int[0];
 260
 261     public void processTypeAliases(ArrayList<DTypeAst> typeAliasesAst) {
 262         TObjectIntHashMap<String> typeAliasMap = new TObjectIntHashMap<String>();
 263         for(int i=0;i<typeAliasesAst.size();++i)
 264             typeAliasMap.put(typeAliasesAst.get(i).name, i);
 265         TIntHashSet tempIntSet = new TIntHashSet();
 266         ArrayList<DTypeAst> orderedTypeAliases = new ArrayList<DTypeAst>(typeAliasesAst.size());
 267         //for(int i=0;i<typeAliasesAst.size();++i)
 268         //    System.out.println(i + "# " + typeAliasesAst.get(i).name);
 269         new StronglyConnectedComponents(typeAliasesAst.size()) {
 270             @Override
 271             protected int[] findDependencies(int u) {
 272                 typeAliasesAst.get(u).type.collectReferences(typeAliasMap, tempIntSet);
 273                 if(tempIntSet.isEmpty())
 274                     return EMPTY_INT_ARRAY;
 275                 if(tempIntSet.contains(u)) {
 276                     errorLog.log(typeAliasesAst.get(u).location, "Type alias has a self reference.");
 277                     tempIntSet.remove(u);
 278                 }
 279                 int[] result = tempIntSet.toArray();
 280                 tempIntSet.clear();
 281                 //System.out.println(u + " -> " + Arrays.toString(result));
 282                 return result;
 283             }
 284             @Override
 285             protected void reportComponent(int[] component) {
 286                 //System.out.println("component: " + Arrays.toString(component));
 287                 if(component.length > 1) {
 288                     StringBuilder b = new StringBuilder();
 289                     b.append("Recursively defined type alias (");
 290                     long minLocation = typeAliasesAst.get(component[0]).location;
 291                     boolean first = true;
 292                     for(int u : component) {
 293                         DTypeAst typeAlias = typeAliasesAst.get(u);
 294                         if(first)
 295                             first = false;
 296                         else
 297                             b.append(", ");
 298                         b.append(typeAlias.name);
 299                         if(Locations.beginOf(typeAlias.location) < Locations.beginOf(minLocation))
 300                             minLocation = typeAlias.location;
 301                     }
 302                     b.append(").");
 303                     errorLog.log(minLocation, b.toString());
 304                 }
 305                 else
 306                     orderedTypeAliases.add(typeAliasesAst.get(component[0]));
 307             }
 308         }.findComponents();
 309
 310         if(errorLog.isEmpty()) {
 311             for(DTypeAst typeAlias : orderedTypeAliases) {
 312                 TypeAlias alias = module.getTypeAlias(typeAlias.name);
 313                 TypeTranslationContext context = createTypeTranslationContext();
 314                 for(int i=0;i<typeAlias.parameters.length;++i)
 315                     context.pushTypeVar(typeAlias.parameters[i]);
 316                 alias.body = typeAlias.type.toType(context, Kinds.metaVar());
 317                 for(int i=0;i<typeAlias.parameters.length;++i)
 318                     alias.parameters[i] = context.popTypeVar(typeAlias.parameters[i], null);
 319             }
 320         }
 321     }
 322
 323     public void processDataTypes(ArrayList<DDataAst> dataTypesAst) {
 324         for(DDataAst dataTypeAst : dataTypesAst) {
 325             TypeTranslationContext context = createTypeTranslationContext();
 326             TVar[] typeParameters = new TVar[dataTypeAst.parameters.length];
 327             for(int i=0;i<dataTypeAst.parameters.length;++i)
 328                 typeParameters[i] = context.addTypeVar(dataTypeAst.parameters[i]);
 329             Constructor[] constructors = new Constructor[dataTypeAst.constructors.length];
 330             String className = null;
 331             boolean external = false;
 332             for(DAnnotationAst annotation : dataTypeAst.getAnnotations()) {
 333                 if(annotation.id.text.equals("@JavaType")) {
 334                     if(annotation.parameters.length != 1 ||
 335                             !(annotation.parameters[0] instanceof ELiteral) ||
 336                             !(((ELiteral)annotation.parameters[0]).getValue() instanceof StringConstant))
 337                         errorLog.log(annotation.location, "Invalid parameters. Expected @JavaType \"className\".");
 338                     else {
 339                         className = ((StringConstant)((ELiteral)annotation.parameters[0]).getValue()).getValue().replace('.', '/');
 340                         external = true;
 341                         break;
 342                     }
 343                 }
 344             }
 345
 346             boolean trivialDataType = dataTypeAst.constructors.length == 1 &&
 347                     dataTypeAst.constructors[0].parameters.length == 1;
 348             if(className == null && !trivialDataType)
 349                 className = namingPolicy.getDataTypeClassName(dataTypeAst.name);
 350
 351             StandardTypeConstructor dataType = dataTypeAst.typeConstructor;
 352
 353             dataType.setType(Types.con(moduleName, dataTypeAst.name), typeParameters);
 354             dataType.setConstructors(constructors);
 355             if(!trivialDataType)
 356                 dataType.setTypeDesc(TypeDesc.forClass(className));
 357             if(!external || dataTypeAst.constructors.length > 0) {
 358                 dataType.isOpen = false;
 359             }
 360             dataType.external = external;
 361             dataTypes.add(dataType);
 362             for(int j=0;j<constructors.length;++j) {
 363                 ConstructorAst constructor = dataTypeAst.constructors[j];
 364                 String name = constructor.name;
 365                 Type[] parameterTypes = new Type[constructor.parameters.length];
 366                 for(int i=constructor.parameters.length-1;i>=0;--i)
 367                     parameterTypes[i] = context.toType(constructor.parameters[i]);
 368                 String javaName = constructors.length == 1 ? className
 369                         : namingPolicy.getConstructorClassName(name);
 370                 String[] fieldNames = null;
 371                 for(DAnnotationAst annotation : constructor.annotations)
 372                     if(annotation.id.text.equals("@JavaType")) {
 373                         try {
 374                             javaName = ((StringConstant)((ELiteral)annotation.parameters[0])
 375                                     .getValue()).getValue();
 376                         } catch(Exception e) {
 377                             errorLog.log(annotation.parameters[0].location, "Invalid annotation parameter.");
 378                         }
 379                     }
 380                     else if(annotation.id.text.equals("@FieldNames")) {
 381                         try {
 382                             EListLiteral literal = (EListLiteral)annotation.parameters[0];
 383                             fieldNames = new String[literal.getComponents().length];
 384                             for(int i=0;i<fieldNames.length;++i) {
 385                                 Expression component = literal.getComponents()[i];
 386                                 if(component instanceof EVar)
 387                                     fieldNames[i] = ((EVar)component).name;
 388                                 else if(component instanceof ELiteral)
 389                                     fieldNames[i] = ((StringConstant)((ELiteral)component).getValue()).getValue();
 390                             }
 391                         } catch(Exception e) {
 392                             errorLog.log(annotation.parameters[0].location, "Invalid annotation parameter.");
 393                             fieldNames = null;
 394                         }
 395                     }
 396
 397                 constructors[j] = new Constructor(constructor.location, dataType,
 398                         Name.create(moduleName, name),
 399                         parameterTypes, javaName);
 400                 constructors[j].fieldNames = fieldNames;
 401                 constructors[j].recordFieldNames = constructor.fieldNames;
 402             }
 403         }
 404     }
 405
 406     public void processTypeClasses(ArrayList<ProcessedDClassAst> typeClassesAst) {
 407         for(ProcessedDClassAst pClassAst : typeClassesAst) {
 408             DClassAst classAst = pClassAst.orig;
 409
 410             if(module.getTypeClass(classAst.name) != null) {
 411                 errorLog.log(classAst.location, "Class "+classAst.name+" has already been defined in this module.");
 412                 continue;
 413             }
 414
 415             TypeTranslationContext context = createTypeTranslationContext();
 416
 417             TPred[] classContext = new TPred[classAst.context.length];
 418             for(int i=0;i<classContext.length;++i)
 419                 classContext[i] = context.toTFuncApply(classAst.context[i]);
 420
 421             TVar[] parameters = new TVar[classAst.parameters.length];
 422
 423             if(classAst.name.equals("Functor") || classAst.name.equals("Monad")) {
 424                 // FIXME hack
 425                 parameters[0] = context.resolveTypeVariable(pClassAst.orig.location, classAst.parameters[0], Kinds.STAR_TO_STAR);
 426             }
 427             else {
 428                 for(int i=0;i<parameters.length;++i)
 429                     parameters[i] = context.resolveTypeVariable(pClassAst.orig.location, classAst.parameters[i], Kinds.metaVar());
 430             }
 431
 432             TCon con = Types.con(moduleName, classAst.name);
 433             TypeClass typeClass = new TypeClass(classAst.location,
 434                     classContext,
 435                     con,
 436                     namingPolicy.getTypeClassInterfaceName(con),
 437                     parameters,
 438                     Fundep.mapFundeps(classAst.parameters, classAst.fundeps));
 439
 440             THashMap<String, TypeClassMethod> methods = typeClass.methods;
 441             for(DValueTypeAst methodDecl : pClassAst.typeDeclarations) {
 442                 try {
 443                     Type type;
 444                     try {
 445                         type = context.toType(methodDecl.type);
 446                     } catch(SCLSyntaxErrorException e) {
 447                         errorLog.log(e.location, e.getMessage());
 448                         continue;
 449                     }
 450                     for(EVar name : methodDecl.names) {
 451                         typeClass.methodNames.add(name.name);
 452                         methods.put(name.name,
 453                                 new TypeClassMethod(typeClass, name.name,
 454                                         namingPolicy.getMethodName(name.name),
 455                                         type, Types.getArity(type),
 456                                         name.location)
 457                                 );
 458                     }
 459                 } catch(RuntimeException e) {
 460                     errorLog.setExceptionPosition(methodDecl.location);
 461                     throw e;
 462                 }
 463             }
 464
 465             for(String methodName : pClassAst.defaultImplementations.getValueNames()) {
 466                 String fullName = "_" + classAst.name + "_default_" + methodName;
 467                 ArrayList<DValueAst> defs = pClassAst.defaultImplementations.getDefinition(methodName);
 468
 469                 TypeClassMethod method = typeClass.methods.get(methodName);
 470                 if(method == null) {
 471                     errorLog.log(defs.get(0).location, "Method " + methodName + " is not defined in this class.");
 472                     continue;
 473                 }
 474                 method.setDefaultImplementation(Name.create(moduleName, fullName));
 475
 476                 valueDefinitionsAst.addDefinitions(fullName, defs);
 477                 /*valueDefinitionsAst.addAnnotation(fullName, new DAnnotationAst(new EVar("@private"),
 478                         Collections.<Expression>emptyList()));*/
 479                 supplementedTypeAnnotations.add(new SupplementedValueType(defs.get(0).location, fullName, method.getType()));
 480             }
 481
 482             module.addTypeClass(classAst.name, typeClass);
 483         }
 484     }
 485
 486     private TypeTranslationContext createTypeTranslationContext() {
 487         return new TypeTranslationContext(errorLog, environment);
 488     }
 489
 490     public void processDerivingInstances(ArrayList<DDerivingInstanceAst> derivingInstancesAst,
 491             ArrayList<ProcessedDInstanceAst> instancesAst) {
 492         for(DDerivingInstanceAst derivingInstance : derivingInstancesAst) {
 493             String name = derivingInstance.name.name;
 494             TCon con;
 495             try {
 496                 con = Environments.getTypeClassName(environment, name);
 497             } catch (AmbiguousNameException e) {
 498                 errorLog.log(derivingInstance.name.location, e.getMessage());
 499                 continue;
 500             }
 501             if(con == null) {
 502                 errorLog.log(derivingInstance.name.location, "Couldn't resolve class " + name + ".");
 503                 continue;
 504             }
 505             InstanceDeriver deriver = InstanceDerivers.get(con);
 506             if(deriver == null)
 507                 errorLog.log(derivingInstance.location, "Doesn't know how to derive " + name + ".");
 508             else
 509                 deriver.derive(errorLog, environment, instancesAst, derivingInstance);
 510         }
 511     }
 512
 513     public void processInstances(ArrayList<ProcessedDInstanceAst> instancesAst) {
 514         THashSet<TPred> instanceClashCheckSet = new THashSet<TPred>();
 515         for(ProcessedDInstanceAst pInstanceAst : instancesAst) {
 516             DInstanceAst instanceAst = pInstanceAst.orig;
 517             try {
 518                 TypeTranslationContext context = createTypeTranslationContext();
 519
 520                 String name = instanceAst.name.name;
 521                 TCon typeClassCon;
 522                 try {
 523                     typeClassCon = Environments.getTypeClassName(environment, name);
 524                 } catch (AmbiguousNameException e) {
 525                     errorLog.log(instanceAst.name.location, e.getMessage());
 526                     continue;
 527                 }
 528                 if(typeClassCon == null) {
 529                     errorLog.log(instanceAst.name.location, "Couldn't resolve class " + name + ".");
 530                     continue;
 531                 }
 532                 TypeClass typeClass = environment.getTypeClass(typeClassCon);
 533                 pInstanceAst.typeClass = typeClass;
 534
 535                 if(instanceAst.types.length != typeClass.parameters.length) {
 536                     errorLog.log(instanceAst.location, "Wrong number of parameters to type class " + typeClassCon.name + ".");
 537                     continue;
 538                 }
 539                 Type[] parameters = new Type[instanceAst.types.length];
 540                 for(int i=0;i<parameters.length;++i)
 541                     parameters[i] = context.toType(instanceAst.types[i], typeClass.parameters[i].getKind() /* FIXME */);
 542                 TPred instance = Types.pred(typeClassCon, parameters);
 543
 544                 if(!instanceClashCheckSet.add(instance)) {
 545                     errorLog.log(instanceAst.location, "Duplicate definition of the instance " + instance + ".");
 546                     continue;
 547                 }
 548
 549                 TPred[] instanceContext = new TPred[instanceAst.context.length];
 550                 for(int i=0;i<instanceContext.length;++i)
 551                     instanceContext[i] = context.toTFuncApply(instanceAst.context[i]);
 552
 553                 String javaName = namingPolicy.getInstanceClassName(instance);
 554                 String instancePrefix = instance.toName() + "$";
 555
 556                 ValueRepository valueDefs = pInstanceAst.valueDefs;
 557
 558                 THashMap<String, MethodImplementation> methodImplementations =
 559                         new THashMap<String, MethodImplementation>();
 560                 for(String valueName : valueDefs.getValueNames()) {
 561                     String fullName = instancePrefix + valueName;
 562                     long loc = valueDefs.getDefinition(valueName).get(0).location;
 563                     valueDefinitionsAst.addFrom(valueDefs, valueName, fullName);
 564                     /*valueDefinitionsAst.addAnnotation(fullName, new DAnnotationAst(new EVar("@private"),
 565                             Collections.<Expression>emptyList()));*/
 566                     TypeClassMethod method = typeClass.methods.get(valueName);
 567                     if(method == null) {
 568                         errorLog.log(loc, "Method " + valueName + " is not defined in the type class " + typeClass.name.name + ".");
 569                         continue;
 570                     }
 571                     Type type = method.getBaseType().replace(typeClass.parameters, parameters);
 572                     for(int i=instanceContext.length-1;i>=0;--i)
 573                         type = Types.constrained(instanceContext[i], type);
 574                     //System.out.println(valueName + " :: " + type);
 575                     supplementedTypeAnnotations.add(
 576                             new SupplementedValueType(loc, fullName, type));
 577                     methodImplementations.put(valueName,
 578                             new MethodImplementation(Name.create(moduleName, fullName), false));
 579                 }
 580
 581                 // Are all necessary methods defined
 582                 for(String methodName : typeClass.methods.keySet())
 583                     if(!methodImplementations.containsKey(methodName)) {
 584                         Name defaultImplementation = typeClass.methods.get(methodName).getDefaultImplementation();
 585                         if(defaultImplementation == null)
 586                             errorLog.log(instanceAst.location, "Method " + methodName + " is not defined.");
 587                         else
 588                             methodImplementations.put(methodName,
 589                                     new MethodImplementation(defaultImplementation, true));
 590                     }
 591
 592                 JavaTypeInstanceConstructor generator = new JavaTypeInstanceConstructor(javaName, instance, instanceContext);
 593                 if(instanceContext.length == 0)
 594                     generator.setHasStaticInstance(true);
 595
 596                 TypeClassInstance typeClassInstance =
 597                         new TypeClassInstance(instanceAst.location, typeClass, generator,
 598                                 generator.getTypeParameters(),
 599                                 instanceContext, instance, methodImplementations,
 600                                 javaName);
 601
 602                 generator.setInstance(typeClassInstance);
 603
 604                 module.addTypeClassInstance(typeClassCon, typeClassInstance);
 605             } catch(RuntimeException e) {
 606                 errorLog.setExceptionPosition(instanceAst.location);
 607                 throw e;
 608             }
 609         }
 610
 611         // Generate superclass functions
 612         for(ArrayList<TypeClassInstance> instanceArray : module.getTypeInstances().values())
 613             for(TypeClassInstance instance : instanceArray) {
 614                 try {
 615                     TypeClass typeClass = instance.typeClass;
 616                     int superCount = typeClass.context.length;
 617
 618                     instance.superExpressions = new SCLValue[superCount];
 619                     for(int i=0;i<superCount;++i) {
 620                         TPred type = (TPred)typeClass.context[i]
 621                                 .replace(typeClass.parameters, instance.instance.parameters);
 622                         SCLValue value = new SCLValue(Name.create(moduleName,
 623                                 instance.javaName.substring(instance.javaName.indexOf('$')+1) + "_super" + i));
 624                         //value.addProperty(PrivateProperty.INSTANCE);
 625                         module.addValue(value);
 626                         Expression expression = new EGetConstraint(instance.location, type);
 627                         value.setExpression(expression);
 628                         value.setType(Types.forAll(instance.generatorParameters, Types.constrained(instance.context, type)));
 629                         //TypeUnparsingContext tuc = new TypeUnparsingContext();
 630                         // TODO error handling
 631                         instance.superExpressions[i] = value;
 632                     }
 633                 } catch(RuntimeException e) {
 634                     errorLog.setExceptionPosition(instance.getLocation());
 635                     throw e;
 636                 }
 637             }
 638     }
 639
 640     public void processJavaMethods(ArrayList<JavaMethodDeclaration> javaMethodDeclarations) {
 641         for(JavaMethodDeclaration javaMethod : javaMethodDeclarations) {
 642             String name = javaMethod.methodName.name;
 643             String javaName = name;
 644             ArrayList<DAnnotationAst> annotations =
 645                     valueDefinitionsAst.getAnnotations(name);
 646             boolean isPrivate = false;
 647             if(annotations != null) {
 648                 for(DAnnotationAst annotation : annotations)
 649                     if(annotation.id.text.equals("@JavaName")) {
 650                         Expression p0 = annotation.parameters[0];
 651                         if(p0 instanceof EVar)
 652                             javaName = ((EVar)p0).name;
 653                         else if(p0 instanceof ELiteral) {
 654                             ELiteral lit = (ELiteral)p0;
 655                             javaName = ((StringConstant)lit.getValue()).getValue();
 656                         }
 657                     }
 658                     else if(annotation.id.text.equals("@private")) {
 659                         isPrivate = true;
 660                     }
 661             }
 662
 663             Type type = createTypeTranslationContext().toType(javaMethod.type);
 664
 665             CallJava callJava = resolveMethod(
 666                     javaMethod.location,
 667                     javaMethod.className,
 668                     javaName,
 669                     type);
 670             if(callJava != null) {
 671                 NameExistenceChecks.checkIfValueExists(errorLog, javaMethod.location,
 672                         importedEnvironment, name);
 673                 SCLValue value = module.addValue(name, callJava);
 674                 value.definitionLocation = javaMethod.methodName.location;
 675                 if(isPrivate)
 676                     value.addProperty(PrivateProperty.INSTANCE);
 677             }
 678         }
 679     }
 680
 681     /**
 682      * Convert a java class method into a {@link CallJava} instance.
 683      * Compilation errors are logged for failures in finding the named class or in accessing the method.
 684      * The return value for errors is {@code null}.
 685      *
 686      * @param loc  SCL source location
 687      * @param className  Name of the class
 688      * @param methodName  Name of the method
 689      * @param type  The expected SCL type of the method
 690      * @return  A new JavaCall instance, or null if the given method can not be instantiated.
 691      */
 692     private CallJava resolveMethod(long loc,
 693             String className, String methodName, Type type) {
 694         // Resolve class
 695         ClassRef classRef = classRefs.get(className);
 696         if(classRef == null) {
 697             if(classRefs.containsKey(className))
 698                 return null;
 699             classRef = javaReferenceValidator.getClassRef(className);
 700             classRefs.put(className, classRef);
 701             if(classRef == null) {
 702                 errorLog.log(loc, "Didn't find class " + className + ".");
 703                 return null;
 704             }
 705             if(!javaReferenceValidator.isPublic(classRef.getClass())) {
 706                 errorLog.log(loc, "Class " + className + " is not public.");
 707                 return null;
 708             }
 709
 710         }
 711
 712         // Resolve method
 713         List<MethodRef> methodRefs = classRef.getMethodRefs(methodName);
 714         if(methodRefs.isEmpty()) {
 715             errorLog.log(loc, "Didn't find any public method or field with name '" + methodName + "' from class " + className + ".");
 716             return null;
 717         }
 718
 719         ArrayList<CallJava> candidates = new ArrayList<CallJava>(2);
 720         for(MethodRef methodRef : methodRefs) {
 721             CallJava candidate = matchType(methodRef, type);
 722             if(candidate != null)
 723                 candidates.add(candidate);
 724         }
 725
 726         if(candidates.isEmpty()) {
 727             StringBuilder b = new StringBuilder();
 728             b.append("Didn't find any public method or field matching the type " + type + ". The following methods and fields were tried:");
 729             for(MethodRef methodRef : methodRefs) {
 730                 b.append("\n    ");
 731                 b.append(methodRef);
 732             }
 733             b.append("\nbut expected something like:");
 734             {
 735                 MultiFunction mFun = Types.matchFunction(type);
 736                 b.append("\n    public static ");
 737                 b.append(javaTypeTranslator.toTypeDesc(mFun.returnType).getFullName()).append(' ').append(methodName).append('(');
 738                 boolean first = true;
 739                 for(Type parameter : mFun.parameterTypes) {
 740                     if(first)
 741                         first = false;
 742                     else
 743                         b.append(", ");
 744                     b.append(javaTypeTranslator.toTypeDesc(parameter).getFullName());
 745                 }
 746                 b.append(')');
 747             }
 748             errorLog.log(loc, b.toString());
 749             return null;
 750         }
 751         else if(candidates.size() == 1)
 752             return candidates.get(0);
 753         else {
 754             // Try to find the best match
 755             ArrayList<CallJava> bestCandidates = new ArrayList<CallJava>(candidates.size());
 756             loop: for(CallJava candidate : candidates) {
 757                 Iterator<CallJava> it = bestCandidates.iterator();
 758                 while(it.hasNext()) {
 759                     CallJava b = it.next();
 760                     switch(candidate.compareTo(javaReferenceValidator, b)) {
 761                     case CallJava.LESS:
 762                     case CallJava.EQUAL:
 763                         continue loop;
 764                     case CallJava.GREATER:
 765                         it.remove();
 766                         break;
 767                     case CallJava.INCOMPARABLE:
 768                         break;
 769                     }
 770                 }
 771                 bestCandidates.add(candidate);
 772             }
 773
 774             if(bestCandidates.size() == 1) {
 775                 // System.out.println("Choose: " + bestCandidates.get(0).getMethodRef());
 776                 return bestCandidates.get(0);
 777             }
 778             else {
 779                 StringBuilder b = new StringBuilder();
 780                 b.append("Found more than one incomparable public methods the type " + type + ":");
 781                 for(CallJava callJava : bestCandidates) {
 782                     b.append("\n    ");
 783                     b.append(callJava.getMethodRef());
 784                 }
 785                 errorLog.log(loc, b.toString());
 786                 return null;
 787             }
 788         }
 789     }
 790
 791     private CallJava matchType(MethodRef methodRef, Type type) {
 792         //System.out.println("-----------------------------------------------------");
 793         //System.out.println("method: " + methodRef);
 794         //System.out.println("type: " + type);
 795
 796         type = Types.canonical(type);
 797         while(type instanceof TForAll)
 798             type = Types.canonical(((TForAll)type).type);
 799
 800         TypeDesc[] expectedParameterTypes = methodRef.getParameterTypes();
 801
 802         ArrayList<Type> parameterTypes = new ArrayList<Type>();
 803         Type effect = Types.NO_EFFECTS;
 804         Type returnType = type;
 805
 806         StackItem[] stackItems = new StackItem[expectedParameterTypes.length];
 807         TIntArrayList unresolvedItems = new TIntArrayList();
 808
 809         loop:
 810         for(int i=0;i<expectedParameterTypes.length;++i) {
 811             Type parameterType;
 812             TypeDesc providedParameterType;
 813             do {
 814                 if(effect != Types.NO_EFFECTS || !(returnType instanceof TFun)) {
 815                     while(i < expectedParameterTypes.length)
 816                         unresolvedItems.add(i++);
 817                     break loop;
 818                 }
 819                 TFun fun = (TFun)returnType;
 820                 parameterType = Types.canonical(fun.domain);
 821                 parameterTypes.add(parameterType);
 822                 effect = Types.canonical(fun.effect);
 823                 returnType = Types.canonical(fun.range);
 824                 providedParameterType = javaTypeTranslator.toTypeDesc(parameterType);
 825             } while(providedParameterType.equals(TypeDesc.VOID));
 826
 827             while(true) {
 828                 TypeDesc expectedParameterType = expectedParameterTypes[i];
 829                 if(javaReferenceValidator.isAssignableFrom(expectedParameterType,
 830                         providedParameterType)) {
 831                     stackItems[i] = new ParameterStackItem(
 832                             parameterTypes.size()-1,
 833                             parameterType);
 834                     break;
 835                 }
 836                 else
 837                     unresolvedItems.add(i++);
 838                 if(i == expectedParameterTypes.length) {
 839                     parameterTypes.remove(parameterTypes.size()-1);
 840                     returnType = Types.functionE(parameterType, effect, returnType);
 841                     break;
 842                 }
 843             }
 844         }
 845         //System.out.println("returnType: " + returnType);
 846         if(!unresolvedItems.isEmpty()) {
 847             ArrayList<TCon> concreteEffects = new ArrayList<TCon>();
 848             effect.collectConcreteEffects(concreteEffects);
 849
 850             for(TCon eff : concreteEffects) {
 851                 EffectConstructor effC = environment.getEffectConstructor(eff);
 852                 for(ThreadLocalVariable var : effC.getThreadLocalVariables()) {
 853                     for(int i=0;i<unresolvedItems.size();++i) {
 854                         int id = unresolvedItems.get(i);
 855                         if(!expectedParameterTypes[id].equals(TypeDesc.OBJECT) &&
 856                                 javaReferenceValidator.isAssignableFrom(expectedParameterTypes[id], var.type)) {
 857                             stackItems[id] = new ThreadLocalStackItem(var.variableName, var.type);
 858                             unresolvedItems.removeAt(i);
 859                             --i;
 860                         }
 861                     }
 862                 }
 863             }
 864
 865             if(!unresolvedItems.isEmpty())
 866                 return null;
 867             /*System.out.print("Unresolved: ");
 868             boolean first = true;
 869             for(int i=0;i<unresolvedItems.size();++i) {
 870                 if(first)
 871                     first = false;
 872                 else
 873                     System.out.print(", ");
 874                 System.out.print(expectedParameterTypes[unresolvedItems.get(i)]);
 875             }
 876             System.out.println();*/
 877         }
 878         OutputFilter filter = null;
 879         {
 880             TypeDesc providedReturnType = methodRef.getReturnType();
 881             if(!providedReturnType.equals(Constants.FUNCTION)) {
 882                 while(returnType instanceof TFun && effect == Types.NO_EFFECTS) {
 883                     TFun fun = (TFun)returnType;
 884                     Type parameterType = Types.canonical(fun.domain);
 885                     if(!javaTypeTranslator.toTypeDesc(parameterType).equals(TypeDesc.VOID))
 886                         return null;
 887                     parameterTypes.add(parameterType);
 888                     effect = Types.canonical(fun.effect);
 889                     returnType = Types.canonical(fun.range);
 890                 }
 891             }
 892             TypeDesc expectedReturnType =
 893                     javaTypeTranslator.toTypeDesc(returnType);
 894             if(!javaReferenceValidator.isAssignableFrom(expectedReturnType,
 895                     providedReturnType)) {
 896                 if(expectedReturnType.equals(TypeDesc.VOID))
 897                     filter = PopOutputFilter.INSTANCE;
 898                 else if(expectedReturnType.equals(Constants.LIST)
 899                         && providedReturnType.equals(Constants.COLLECTION))
 900                     filter = ConvertToListFilter.INSTANCE;
 901                 else
 902                     return null;
 903             }
 904         }
 905
 906         CallJava result = new CallJava(
 907                 Types.freeVarsArray(type),
 908                 effect,
 909                 returnType,
 910                 parameterTypes.toArray(new Type[parameterTypes.size()]),
 911                 stackItems,
 912                 methodRef,
 913                 filter);
 914         //System.out.println(result.getType());
 915         return result;
 916     }
 917
 918     public void processMappingRelations(ArrayList<DMappingRelationAst> mappingRelationsAst) {
 919         for(DMappingRelationAst mappingRelation : mappingRelationsAst) {
 920             TypeAst[] parameterTypesAst = mappingRelation.parameterTypes;
 921             Type[] parameterTypes = new Type[parameterTypesAst.length];
 922             TypeTranslationContext typeTranslationContext = createTypeTranslationContext();
 923             for(int i=0;i<parameterTypes.length;++i)
 924                 parameterTypes[i] = parameterTypesAst[i].toType(typeTranslationContext, Kinds.STAR);
 925             MappingRelation mRel =
 926                     new MappingRelation(Name.create(moduleName, mappingRelation.name), parameterTypes);
 927             mRel.location = mappingRelation.location;
 928             if(module.addMappingRelation(mRel))
 929                 errorLog.log(mappingRelation.location, "Mapping relation " + mappingRelation.name +
 930                         " has already been defined.");
 931         }
 932     }
 933
 934     THashMap<String, DRuleAst> ruleAstMap = new THashMap<String, DRuleAst>();
 935
 936     public void processRules(ArrayList<DRuleAst> rulesAst) {
 937         // Find implied mapping relations
 938         for(DRuleAst ruleA : rulesAst) {
 939             ArrayList<Query> whereSection = ruleA.getSections().get("where");
 940             if(whereSection != null)
 941                 for(Query query : whereSection) {
 942                     if(!(query instanceof QPreGuard))
 943                         continue;
 944                     QPreGuard guard = (QPreGuard)query;
 945                     if(!(guard.guard instanceof EApply))
 946                         continue;
 947                     EApply apply = (EApply)guard.guard;
 948                     if(!(apply.getFunction() instanceof EVar))
 949                         continue;
 950
 951                     String name = ((EVar)apply.getFunction()).name;
 952                     if(module.getMappingRelation(name) != null)
 953                         continue;
 954
 955                     int arity = apply.getParameters().length;
 956                     Type[] parameterTypes = new Type[arity];
 957                     for(int i=0;i<arity;++i)
 958                         parameterTypes[i] = Types.metaVar(Kinds.STAR);
 959                     MappingRelation mRel =
 960                             new MappingRelation(Name.create(moduleName, name), parameterTypes);
 961                     mRel.location = query.location;
 962                     module.addMappingRelation(mRel);
 963                 }
 964             if(ruleAstMap.put(ruleA.name, ruleA) != null)
 965                 errorLog.log(ruleA.location, "Rule " + ruleA.name +
 966                         " has already been defined.");
 967         }
 968
 969         //
 970         for(String ruleName : ruleAstMap.keySet())
 971             processRule(ruleName);
 972     }
 973
 974     private TransformationRule processRule(String ruleName) {
 975         TransformationRule rule = module.getRule(ruleName);
 976         if(rule != null)
 977             return rule;
 978
 979         DRuleAst ruleAst = ruleAstMap.get(ruleName);
 980         if(ruleAst.alreadyProcessing) {
 981             errorLog.log(ruleAst.location, "Cyclic chain of rule extensions.");
 982             return null;
 983         }
 984
 985         TransformationRule[] extendsRules;
 986         int length = ruleAst.extendsNames.length;
 987         if(length == 0)
 988             extendsRules = TransformationRule.EMPTY_ARRAY;
 989         else {
 990             extendsRules = new TransformationRule[length];
 991             for(int i=0;i<length;++i) {
 992                 try {
 993                     String extendsName = ruleAst.extendsNames[i];
 994                     TransformationRule extendsRule;
 995                     if(ruleAstMap.containsKey(extendsName))
 996                         extendsRule = processRule(extendsName);
 997                     else {
 998                         extendsRule = Environments.getRule(environment, extendsName);
 999                         if(extendsRule == null)
1000                             errorLog.log(ruleAst.location,
1001                                     "Couldn't resolve rule name " + extendsName + ".");
1002                     }
1003                     extendsRules[i] = extendsRule;
1004                 } catch(AmbiguousNameException e) {
1005                     errorLog.log(ruleAst.location, e.getMessage());
1006                 }
1007             }
1008         }
1009
1010         final THashMap<SectionName, Query[]> sections = new THashMap<SectionName, Query[]>();
1011
1012         final TranslationContext context = createTranslationContext();
1013         if(length > 0) {
1014             THashMap<String, Variable> variables = context.getVariables();
1015             for(TransformationRule extendsRule : extendsRules) {
1016                 if(extendsRule == null)
1017                     continue;
1018                 for(Variable var : extendsRule.variables)
1019                     if(variables.put(var.getName(), var) != null) {
1020                         errorLog.log(ruleAst.location,
1021                                 "Variable " + var.getName() + " is defined in more than one base rule, which is not currently allowed.");
1022                     }
1023             }
1024         }
1025         context.pushExistentialFrame();
1026         ruleAst.getSections().forEachEntry(new TObjectObjectProcedure<String, ArrayList<Query>>() {
1027             @Override
1028             public boolean execute(String sectionNameString, ArrayList<Query> queries) {
1029                 Query[] resolvedQueries = new Query[queries.size()];
1030                 for(int i=0;i<resolvedQueries.length;++i)
1031                     resolvedQueries[i] = queries.get(i).resolve(context);
1032
1033                 SectionName sectionName = SectionName.getSectionName(sectionNameString);
1034                 if(sectionName == null)
1035                     context.getErrorLog().log(queries.get(0).location,
1036                             "Invalid section name " + sectionNameString + ".");
1037                 else
1038                     sections.put(sectionName, resolvedQueries);
1039                 return true;
1040             }
1041         });
1042
1043         Variable[] variables = context.getVariables().values().toArray(new Variable[context.getVariables().size()]);
1044
1045         rule = new TransformationRule(ruleAst.isAbstract,
1046                 Name.create(moduleName, ruleAst.name),
1047                 extendsRules,
1048                 sections, variables);
1049         rule.location = ruleAst.location;
1050         module.addRule(rule);
1051         return rule;
1052     }
1053
1054     public void addDataTypesToEnvironment() {
1055         for(StandardTypeConstructor dataType : dataTypes) {
1056             int constructorTag = 0;
1057             for(Constructor constructor : dataType.constructors) {
1058                 SCLValue value = new SCLValue(constructor.name);
1059                 SCLConstructor sclConstructor =
1060                         new SCLConstructor(
1061                                 constructor.name.name,
1062                                 constructor.javaName,
1063                                 constructor.getTypeVariables(),
1064                                 constructorTag++,
1065                                 constructor.getReturnType(),
1066                                 constructor.fieldNames == null
1067                                         ? SCLConstructor.DEFAULT_FIELD_NAMES[constructor.getParameterTypes().length]
1068                                         : constructor.fieldNames,
1069                                 constructor.recordFieldNames,
1070                                 constructor.getParameterTypes());
1071                 if(dataType.constructors.length == 1 && (
1072                         dataType.getTypeDesc() == null ||
1073                         dataType.constructors[0].javaName.equals(MethodBuilderBase.getClassName(dataType.getTypeDesc()))))
1074                     sclConstructor.setOnlyConstructor(true);
1075                 value.setValue(sclConstructor);
1076                 value.setType(constructor.getType());
1077
1078                 NameExistenceChecks.checkIfValueExists(errorLog, constructor.loc,
1079                         importedEnvironment, constructor.name.name);
1080                 if(module.addValue(value)) {
1081                     errorLog.log(constructor.loc,
1082                             "Value " + constructor.name.name + " is already defined.");
1083                 }
1084             }
1085         }
1086     }
1087
1088     public void addTypeClassesToEnvironment() {
1089         for(TypeClass typeClass : module.getTypeClasses()) {
1090             for(TypeClassMethod method : typeClass.methods.values()) {
1091                 SCLValue value = method.createValue();
1092                 value.definitionLocation = method.location;
1093                 NameExistenceChecks.checkIfValueExists(errorLog, Locations.NO_LOCATION,
1094                         importedEnvironment, value.getName().name);
1095
1096                 if(module.addValue(value)) {
1097                     String name = method.getName();
1098                     long location = Locations.NO_LOCATION;
1099                     ArrayList<DValueAst> definitions = valueDefinitionsAst.getDefinition(name);
1100                     if(definitions != null && !definitions.isEmpty())
1101                         location = definitions.get(0).location;
1102                     errorLog.log(location, "Value " + name + " is already defined.");
1103                 }
1104             }
1105         }
1106     }
1107
1108     public void preprocessValueDefinitions(ArrayList<DValueTypeAst> typeAnnotationsAst) {
1109         for(String name : valueDefinitionsAst.getValueNames()) {
1110             SCLValue value = new SCLValue(Name.create(moduleName, name));
1111
1112             long location = valueDefinitionsAst.getLocation(name);
1113             NameExistenceChecks.checkIfValueExists(errorLog, location,
1114                     importedEnvironment, value.getName().name);
1115             value.definitionLocation = location;
1116             if(module.addValue(value))
1117                 errorLog.log(location, "Value " + name + " is already defined.");
1118         }
1119         for(DValueTypeAst valueTypeAst : typeAnnotationsAst)
1120             for(EVar name : valueTypeAst.names) {
1121                 SCLValue value = module.getValue(name.name);
1122                 if(value == null) {
1123                     errorLog.log(valueTypeAst.location, name.name + " is not defined.");
1124                     value = new SCLValue(Name.create(moduleName, name.name));
1125                     module.addValue(value);
1126                 }
1127                 value.definitionLocation = name.location;
1128             }
1129         for(String name : relationDefinitionsAst.getRelationNames()) {
1130             ConcreteRelation relation = new ConcreteRelation(name);
1131             module.addRelation(name, relation);
1132         }
1133     }
1134
1135     public void addValueDefinitionsToEnvironment(ArrayList<DValueTypeAst> typeAnnotationsAst) {
1136         THashMap<String, DValueTypeAst> typeMap = new THashMap<String, DValueTypeAst>();
1137         for(DValueTypeAst valueTypeAst : typeAnnotationsAst)
1138             for(EVar name : valueTypeAst.names) {
1139                 if(typeMap.containsKey(name.name))
1140                     errorLog.log(valueTypeAst.location, "Type of "+name.name+" has already been declared in this module.");
1141                 else
1142                     typeMap.put(name.name, valueTypeAst);
1143             }
1144
1145         for(String name : valueDefinitionsAst.getValueNames()) {
1146             ArrayList<DValueAst> defs = valueDefinitionsAst.getDefinition(name);
1147             try {
1148                 SCLValue value = module.getValue(name);
1149                 TranslationContext context = createTranslationContext();
1150                 Expression expression = context.translateCases2(defs);
1151                 value.setExpression(expression);
1152
1153                 DValueTypeAst valueTypeAst = typeMap.remove(name);
1154                 if(valueTypeAst != null)
1155                     value.setType(Types.closure(context.toType(valueTypeAst.type)));
1156
1157                 ArrayList<DAnnotationAst> annotations = valueDefinitionsAst.getAnnotations(name);
1158                 if(annotations != null)
1159                     for(DAnnotationAst annotation : annotations) {
1160                         handleAnnotation(value, defs, annotation);
1161                     }
1162             } catch(RuntimeException e) {
1163                 errorLog.setExceptionPosition(defs.get(0).location);
1164                 throw e;
1165             }
1166         }
1167         for(String name : relationDefinitionsAst.getRelationNames()) {
1168             ArrayList<DRelationAst> definitions = relationDefinitionsAst.getDefinition(name);
1169             if(definitions.size() > 1) {
1170                 errorLog.log(definitions.get(1).location,
1171                         "Does not yet support definition of relations by more than one rule.");
1172                 continue;
1173             }
1174
1175             DRelationAst definition = definitions.get(0);
1176             ConcreteRelation relation = (ConcreteRelation)module.getRelation(name);
1177             relation.location = definition.location;
1178             TranslationContext context = createTranslationContext();
1179             definition.translateTo(context, relation);
1180         }
1181     }
1182
1183     private TranslationContext createTranslationContext() {
1184         return new TranslationContext(errorLog, environment, null);
1185     }
1186
1187     private void handleAnnotation(SCLValue value, ArrayList<DValueAst> defs, DAnnotationAst annotation) {
1188         if(annotation.id.text.equals("@macro")) {
1189             value.setMacroRule(new StandardMacroRule());
1190         }
1191         else if(annotation.id.text.equals("@inline")) {
1192             try {
1193                 int arity = defs.get(0).lhs.getFunctionDefinitionArity();
1194                 int phaseMask = 0xffffffff;
1195                 if(annotation.parameters.length > 0) {
1196                     phaseMask = Integer.parseInt(((EIntegerLiteral)annotation.parameters[0]).getValue());
1197                 }
1198                 value.addProperty(new InlineProperty(arity, phaseMask));
1199             } catch(NotPatternException e) {
1200                 errorLog.log(annotation.location, "Inline annotation is invalid: this is not a function.");
1201             }
1202         }
1203         else if(annotation.id.text.equals("@private")) {
1204             value.addProperty(PrivateProperty.INSTANCE);
1205         }
1206         else if(annotation.id.text.equals("@deprecated")) {
1207             // TODO
1208         }
1209         else
1210             errorLog.log(annotation.location, "Unknown annotation.");
1211     }
1212
1213     public void addSupplementedTypeAnnotationsToEnvironment() {
1214         for(SupplementedValueType valueType : supplementedTypeAnnotations) {
1215             Type type = Types.closure(valueType.type);
1216             String name = valueType.name;
1217             SCLValue value = module.getValue(name);
1218             if(value == null)
1219                 errorLog.log(valueType.position,
1220                         name + " is not defined.");
1221             else if(value.getType()==null)
1222                 value.setType(type);
1223             else
1224                 errorLog.log(valueType.position,
1225                         "Type of "+name+" has already been declared in this module.");
1226         }
1227     }
1228
1229     public void addFixityToEnvironment(ArrayList<DFixityAst> fixityAst) {
1230         for(DFixityAst fixity : fixityAst) {
1231             for(EVar symbol : fixity.symbols) {
1232                 String name = symbol.name;
1233                 SCLValue value = module.getValue(name);
1234                 if(value == null)
1235                     errorLog.log(symbol.location,
1236                             name + " is not defined.");
1237                 else
1238                     value.setPrecedence(fixity.precedence);
1239             }
1240         }
1241     }
1242
1243     public void addCoverageBranchPoints() {
1244         branchPoints = new THashMap<String, BranchPoint[]>();
1245         BranchPointInjector injector = new BranchPointInjector();
1246         for(String valueName : valueDefinitionsAst.getValueNames()) {
1247             for(DValueAst valueAst : valueDefinitionsAst.getDefinition(valueName))
1248                 valueAst.value = injector.injectBranchPoint(valueAst.value);
1249             branchPoints.put(valueName, injector.getAndClearBranchPoints());
1250         }
1251     }
1252 }