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