bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/compilation/Elaboration.java

   1 package org.simantics.scl.compiler.compilation;
   2
   3 import java.util.ArrayList;
   4 import java.util.Iterator;
   5 import java.util.List;
   6
   7 import org.cojen.classfile.TypeDesc;
   8 import org.simantics.scl.compiler.common.datatypes.Constructor;
   9 import org.simantics.scl.compiler.common.exceptions.InternalCompilerError;
  10 import org.simantics.scl.compiler.common.names.Name;
  11 import org.simantics.scl.compiler.constants.Constant;
  12 import org.simantics.scl.compiler.constants.JavaTypeInstanceConstructor;
  13 import org.simantics.scl.compiler.constants.SCLConstructor;
  14 import org.simantics.scl.compiler.constants.StringConstant;
  15 import org.simantics.scl.compiler.constants.generic.CallJava;
  16 import org.simantics.scl.compiler.constants.generic.ClassRef;
  17 import org.simantics.scl.compiler.constants.generic.ConvertToListFilter;
  18 import org.simantics.scl.compiler.constants.generic.MethodRef;
  19 import org.simantics.scl.compiler.constants.generic.MethodRef.FieldRef;
  20 import org.simantics.scl.compiler.constants.generic.OutputFilter;
  21 import org.simantics.scl.compiler.constants.generic.ParameterStackItem;
  22 import org.simantics.scl.compiler.constants.generic.Pop2OutputFilter;
  23 import org.simantics.scl.compiler.constants.generic.PopOutputFilter;
  24 import org.simantics.scl.compiler.constants.generic.StackItem;
  25 import org.simantics.scl.compiler.constants.generic.ThreadLocalStackItem;
  26 import org.simantics.scl.compiler.constants.singletons.SafeCoerce;
  27 import org.simantics.scl.compiler.elaboration.contexts.TranslationContext;
  28 import org.simantics.scl.compiler.elaboration.contexts.TypeTranslationContext;
  29 import org.simantics.scl.compiler.elaboration.errors.NotPatternException;
  30 import org.simantics.scl.compiler.elaboration.expressions.EApply;
  31 import org.simantics.scl.compiler.elaboration.expressions.EGetConstraint;
  32 import org.simantics.scl.compiler.elaboration.expressions.EIntegerLiteral;
  33 import org.simantics.scl.compiler.elaboration.expressions.EListLiteral;
  34 import org.simantics.scl.compiler.elaboration.expressions.ELiteral;
  35 import org.simantics.scl.compiler.elaboration.expressions.EPreCHRRulesetConstructor;
  36 import org.simantics.scl.compiler.elaboration.expressions.EVar;
  37 import org.simantics.scl.compiler.elaboration.expressions.Expression;
  38 import org.simantics.scl.compiler.elaboration.expressions.Variable;
  39 import org.simantics.scl.compiler.elaboration.expressions.annotations.AnnotationUtils;
  40 import org.simantics.scl.compiler.elaboration.fundeps.Fundep;
  41 import org.simantics.scl.compiler.elaboration.java.JavaMethodDeclaration;
  42 import org.simantics.scl.compiler.elaboration.macros.StandardMacroRule;
  43 import org.simantics.scl.compiler.elaboration.modules.DeprecatedProperty;
  44 import org.simantics.scl.compiler.elaboration.modules.DerivedProperty;
  45 import org.simantics.scl.compiler.elaboration.modules.InlineProperty;
  46 import org.simantics.scl.compiler.elaboration.modules.MethodImplementation;
  47 import org.simantics.scl.compiler.elaboration.modules.PrivateProperty;
  48 import org.simantics.scl.compiler.elaboration.modules.SCLValue;
  49 import org.simantics.scl.compiler.elaboration.modules.TypeAlias;
  50 import org.simantics.scl.compiler.elaboration.modules.TypeClass;
  51 import org.simantics.scl.compiler.elaboration.modules.TypeClassInstance;
  52 import org.simantics.scl.compiler.elaboration.modules.TypeClassMethod;
  53 import org.simantics.scl.compiler.elaboration.modules.TypeDescriptor;
  54 import org.simantics.scl.compiler.elaboration.query.Query;
  55 import org.simantics.scl.compiler.elaboration.query.pre.QPreGuard;
  56 import org.simantics.scl.compiler.elaboration.relations.ConcreteRelation;
  57 import org.simantics.scl.compiler.elaboration.rules.MappingRelation;
  58 import org.simantics.scl.compiler.elaboration.rules.SectionName;
  59 import org.simantics.scl.compiler.elaboration.rules.TransformationRule;
  60 import org.simantics.scl.compiler.environment.AmbiguousNameException;
  61 import org.simantics.scl.compiler.environment.Environment;
  62 import org.simantics.scl.compiler.environment.EnvironmentFactory;
  63 import org.simantics.scl.compiler.environment.Environments;
  64 import org.simantics.scl.compiler.errors.CompilationError;
  65 import org.simantics.scl.compiler.errors.ErrorLog;
  66 import org.simantics.scl.compiler.errors.ErrorSeverity;
  67 import org.simantics.scl.compiler.errors.Locations;
  68 import org.simantics.scl.compiler.internal.codegen.effects.EffectConstructor;
  69 import org.simantics.scl.compiler.internal.codegen.effects.ThreadLocalVariable;
  70 import org.simantics.scl.compiler.internal.codegen.types.JavaReferenceValidator;
  71 import org.simantics.scl.compiler.internal.codegen.types.JavaReferenceValidatorFactory;
  72 import org.simantics.scl.compiler.internal.codegen.types.JavaTypeTranslator;
  73 import org.simantics.scl.compiler.internal.codegen.types.StandardTypeConstructor;
  74 import org.simantics.scl.compiler.internal.codegen.utils.Constants;
  75 import org.simantics.scl.compiler.internal.codegen.utils.JavaNamingPolicy;
  76 import org.simantics.scl.compiler.internal.codegen.utils.MethodBuilderBase;
  77 import org.simantics.scl.compiler.internal.deriving.InstanceDeriver;
  78 import org.simantics.scl.compiler.internal.deriving.InstanceDerivers;
  79 import org.simantics.scl.compiler.internal.elaboration.profiling.BranchPointInjector;
  80 import org.simantics.scl.compiler.internal.elaboration.utils.StronglyConnectedComponents;
  81 import org.simantics.scl.compiler.internal.header.ModuleHeader;
  82 import org.simantics.scl.compiler.internal.parsing.Token;
  83 import org.simantics.scl.compiler.internal.parsing.declarations.ConstructorAst;
  84 import org.simantics.scl.compiler.internal.parsing.declarations.DAnnotationAst;
  85 import org.simantics.scl.compiler.internal.parsing.declarations.DClassAst;
  86 import org.simantics.scl.compiler.internal.parsing.declarations.DDataAst;
  87 import org.simantics.scl.compiler.internal.parsing.declarations.DDerivingInstanceAst;
  88 import org.simantics.scl.compiler.internal.parsing.declarations.DEffectAst;
  89 import org.simantics.scl.compiler.internal.parsing.declarations.DFixityAst;
  90 import org.simantics.scl.compiler.internal.parsing.declarations.DInstanceAst;
  91 import org.simantics.scl.compiler.internal.parsing.declarations.DMappingRelationAst;
  92 import org.simantics.scl.compiler.internal.parsing.declarations.DRelationAst;
  93 import org.simantics.scl.compiler.internal.parsing.declarations.DRuleAst;
  94 import org.simantics.scl.compiler.internal.parsing.declarations.DRulesetAst;
  95 import org.simantics.scl.compiler.internal.parsing.declarations.DTypeAst;
  96 import org.simantics.scl.compiler.internal.parsing.declarations.DValueAst;
  97 import org.simantics.scl.compiler.internal.parsing.declarations.DValueTypeAst;
  98 import org.simantics.scl.compiler.internal.parsing.exceptions.SCLSyntaxErrorException;
  99 import org.simantics.scl.compiler.internal.parsing.parser.SCLTerminals;
 100 import org.simantics.scl.compiler.internal.parsing.translation.ProcessedDClassAst;
 101 import org.simantics.scl.compiler.internal.parsing.translation.ProcessedDInstanceAst;
 102 import org.simantics.scl.compiler.internal.parsing.translation.RelationRepository;
 103 import org.simantics.scl.compiler.internal.parsing.translation.ValueRepository;
 104 import org.simantics.scl.compiler.internal.parsing.types.TypeAst;
 105 import org.simantics.scl.compiler.module.ConcreteModule;
 106 import org.simantics.scl.compiler.module.ImportDeclaration;
 107 import org.simantics.scl.compiler.module.InvalidModulePathException;
 108 import org.simantics.scl.compiler.module.ModuleUtils;
 109 import org.simantics.scl.compiler.module.repository.ImportFailure;
 110 import org.simantics.scl.compiler.module.repository.ImportFailureException;
 111 import org.simantics.scl.compiler.types.TCon;
 112 import org.simantics.scl.compiler.types.TForAll;
 113 import org.simantics.scl.compiler.types.TFun;
 114 import org.simantics.scl.compiler.types.TPred;
 115 import org.simantics.scl.compiler.types.TVar;
 116 import org.simantics.scl.compiler.types.Type;
 117 import org.simantics.scl.compiler.types.Types;
 118 import org.simantics.scl.compiler.types.kinds.Kind;
 119 import org.simantics.scl.compiler.types.kinds.Kinds;
 120 import org.simantics.scl.compiler.types.util.MultiFunction;
 121 import org.simantics.scl.runtime.profiling.BranchPoint;
 122
 123 import gnu.trove.list.array.TIntArrayList;
 124 import gnu.trove.map.hash.THashMap;
 125 import gnu.trove.map.hash.TObjectIntHashMap;
 126 import gnu.trove.procedure.TObjectObjectProcedure;
 127 import gnu.trove.set.hash.THashSet;
 128 import gnu.trove.set.hash.TIntHashSet;
 129
 130 public class Elaboration {
 131     // inputs
 132     private final CompilationContext compilationContext;
 133     private final ErrorLog errorLog;
 134     private final String moduleName;
 135     private final ModuleHeader moduleHeader;
 136     private final ArrayList<ImportDeclaration> importsAst;
 137     private final JavaReferenceValidatorFactory jrvFactory;
 138     final JavaReferenceValidator<Object, Object, Object, Object> javaReferenceValidator;
 139     private final ValueRepository valueDefinitionsAst;
 140     private final RelationRepository relationDefinitionsAst;
 141
 142     // creates
 143     ConcreteModule module;
 144     Environment importedEnvironment;
 145     ArrayList<SupplementedValueType> supplementedTypeAnnotations = new ArrayList<SupplementedValueType>();
 146
 147     JavaTypeTranslator javaTypeTranslator;
 148     ArrayList<StandardTypeConstructor> dataTypes = new ArrayList<StandardTypeConstructor>();
 149     THashMap<String, ClassRef> classRefs = new THashMap<String, ClassRef>();
 150     THashMap<String, BranchPoint[]> branchPoints;
 151
 152     public Elaboration(CompilationContext compilationContext, CompilationTimer timer, EnvironmentFactory localEnvironmentFactory,
 153             String moduleName, ModuleHeader moduleHeader, ArrayList<ImportDeclaration> importsAst,
 154             JavaReferenceValidatorFactory jrvFactory,
 155             ValueRepository valueDefinitionsAst,
 156             RelationRepository relationDefinitionsAst) {
 157         this.compilationContext = compilationContext;
 158         this.errorLog = compilationContext.errorLog;
 159         this.moduleName = moduleName;
 160         this.moduleHeader = moduleHeader;
 161         if(moduleName != null)
 162             importsAst = processRelativeImports(compilationContext.errorLog, moduleName, importsAst);
 163         this.importsAst = importsAst;
 164         this.jrvFactory = jrvFactory;
 165         this.javaReferenceValidator = moduleHeader == null || moduleHeader.classLoader == null
 166                 ? jrvFactory.getDefaultJavaReferenceValidator()
 167                 : jrvFactory.getJavaReferenceValidator(moduleHeader.classLoader);
 168         if(javaReferenceValidator == null)
 169             errorLog.log(moduleHeader.classLoaderLocation, "Didn't find the specified class loader.");
 170         this.valueDefinitionsAst = valueDefinitionsAst;
 171         this.relationDefinitionsAst = relationDefinitionsAst;
 172
 173         module = new ConcreteModule(moduleName);
 174         compilationContext.module = module;
 175         compilationContext.moduleRepository = localEnvironmentFactory.getModuleRepository();
 176         if(moduleHeader != null) {
 177             if(moduleHeader.defaultLocalName != null)
 178                 module.setDefaultLocalName(moduleHeader.defaultLocalName);
 179             if(moduleHeader.deprecated != null)
 180                 module.setDeprecation(moduleHeader.deprecated);
 181         }
 182         try {
 183             if(timer != null)
 184                 timer.suspendTimer();
 185             importedEnvironment = localEnvironmentFactory.createEnvironment(
 186                     compilationContext,
 187                     importsAst.toArray(new ImportDeclaration[importsAst.size()]));
 188             if(timer != null)
 189                 timer.continueTimer();
 190             compilationContext.environment = new EnvironmentOfModule(importedEnvironment, module);
 191         } catch (ImportFailureException e) {
 192             for(ImportFailure failure : e.failures)
 193                 errorLog.log(new CompilationError(failure.location, failure.toString(), ErrorSeverity.IMPORT_ERROR));
 194             return;
 195         }
 196         for(ImportDeclaration importAst : importsAst)
 197             this.module.addDependency(new ImportDeclaration(
 198                     importAst.moduleName,
 199                     importAst.reexport ? importAst.localName : null,
 200                     false,
 201                     importAst.spec));
 202         localEnvironmentFactory.addBuiltinDependencies(module);
 203         compilationContext.namingPolicy = new JavaNamingPolicy(moduleName);
 204     }
 205
 206     public static ArrayList<ImportDeclaration> processRelativeImports(ErrorLog errorLog, String moduleName, ArrayList<ImportDeclaration> relativeImports) {
 207         ArrayList<ImportDeclaration> absoluteImports = new ArrayList<ImportDeclaration>(relativeImports.size());
 208         for(ImportDeclaration relativeImport : relativeImports) {
 209             if(relativeImport.moduleName.startsWith(".")) {
 210                                 try {
 211                                         String absoluteModuleName = ModuleUtils.resolveAbsolutePath(moduleName, relativeImport.moduleName);
 212                     ImportDeclaration absoluteImport = new ImportDeclaration(
 213                             relativeImport.location,
 214                             absoluteModuleName, relativeImport.localName,
 215                             relativeImport.reexport, relativeImport.spec);
 216                     absoluteImports.add(absoluteImport);
 217                                 } catch (InvalidModulePathException e) {
 218                                     if(errorLog != null)
 219                                         errorLog.log(relativeImport.location, e.getMessage());
 220                                 }
 221             }
 222             else
 223                 absoluteImports.add(relativeImport);
 224         }
 225         return absoluteImports;
 226     }
 227
 228     public void addTypesToEnvironment(
 229             ArrayList<DDataAst> dataTypesAst,
 230             ArrayList<DTypeAst> typeAliasesAst,
 231             ArrayList<DEffectAst> effectsAst,
 232             ArrayList<DRulesetAst> rulesetsAst) {
 233         for(DDataAst dataType : dataTypesAst) {
 234             dataType.parameterKinds = new Kind[dataType.parameters.length];
 235             Kind constructorKind = Kinds.STAR;
 236             for(int i=dataType.parameters.length-1;i>=0;--i) {
 237                 Kind kind = Kinds.metaVar();
 238                 dataType.parameterKinds[i] = kind;
 239                 constructorKind = Kinds.arrow(kind, constructorKind);
 240             }
 241
 242             StandardTypeConstructor typeConstructor = new StandardTypeConstructor(
 243                     Types.con(moduleName, dataType.name), constructorKind);
 244
 245             NameExistenceChecks.checkIfTypeExists(errorLog,
 246                     dataType.location, importedEnvironment, dataType.name);
 247             addTypeDescriptor(dataType.location, dataType.name, typeConstructor);
 248             dataType.typeConstructor = typeConstructor;
 249         }
 250
 251         for(DTypeAst typeAlias : typeAliasesAst) {
 252             TypeAlias alias = new TypeAlias(Types.con(moduleName, typeAlias.name), typeAlias.parameters.length);
 253             NameExistenceChecks.checkIfTypeExists(errorLog,
 254                     typeAlias.location, importedEnvironment, typeAlias.name);
 255             addTypeDescriptor(typeAlias.location, typeAlias.name, alias);
 256         }
 257
 258         for(DEffectAst effect : effectsAst) {
 259             EffectConstructor effectConstructor = new EffectConstructor(Types.con(moduleName, effect.name));
 260             effectConstructor.addThreadLocalVariable(
 261                     new ThreadLocalVariable(
 262                             effect.variableName,
 263                             TypeDesc.forClass(effect.threadLocalType)
 264                             ));
 265             if(module.addEffectConstructor(effect.name, effectConstructor))
 266                 errorLog.log(effect.location, "Effect "+effect.name+" has already been defined in this module.");
 267         }
 268         for(DRulesetAst ruleset : rulesetsAst) {
 269             ruleset.type = Types.con(moduleName, ruleset.name);
 270             ruleset.className = compilationContext.namingPolicy.getDataTypeClassName(ruleset.name);
 271             StandardTypeConstructor typeConstructor = new StandardTypeConstructor(ruleset.type, Kinds.STAR,
 272                     TypeDesc.forClass(ruleset.className), ruleset.documentation == null ? null : ruleset.documentation.documentation);
 273             typeConstructor.external = true;
 274             addTypeDescriptor(ruleset.location, ruleset.name, typeConstructor);
 275         }
 276         javaTypeTranslator = new JavaTypeTranslator(compilationContext.environment);
 277         compilationContext.javaTypeTranslator = javaTypeTranslator;
 278     }
 279
 280     private void addTypeDescriptor(long location, String name, TypeDescriptor typeDescriptor) {
 281         if(module.addTypeDescriptor(name, typeDescriptor))
 282             errorLog.log(location, "Type "+name+" has already been defined in this module.");
 283     }
 284
 285     private static final int[] EMPTY_INT_ARRAY = new int[0];
 286
 287     public void processTypeAliases(ArrayList<DTypeAst> typeAliasesAst) {
 288         TObjectIntHashMap<String> typeAliasMap = new TObjectIntHashMap<String>();
 289         for(int i=0;i<typeAliasesAst.size();++i)
 290             typeAliasMap.put(typeAliasesAst.get(i).name, i);
 291         TIntHashSet tempIntSet = new TIntHashSet();
 292         ArrayList<DTypeAst> orderedTypeAliases = new ArrayList<DTypeAst>(typeAliasesAst.size());
 293         //for(int i=0;i<typeAliasesAst.size();++i)
 294         //    System.out.println(i + "# " + typeAliasesAst.get(i).name);
 295         new StronglyConnectedComponents(typeAliasesAst.size()) {
 296             @Override
 297             protected int[] findDependencies(int u) {
 298                 typeAliasesAst.get(u).type.collectReferences(typeAliasMap, tempIntSet);
 299                 if(tempIntSet.isEmpty())
 300                     return EMPTY_INT_ARRAY;
 301                 if(tempIntSet.contains(u)) {
 302                     errorLog.log(typeAliasesAst.get(u).location, "Type alias has a self reference.");
 303                     tempIntSet.remove(u);
 304                 }
 305                 int[] result = tempIntSet.toArray();
 306                 tempIntSet.clear();
 307                 //System.out.println(u + " -> " + Arrays.toString(result));
 308                 return result;
 309             }
 310             @Override
 311             protected void reportComponent(int[] component) {
 312                 //System.out.println("component: " + Arrays.toString(component));
 313                 if(component.length > 1) {
 314                     StringBuilder b = new StringBuilder();
 315                     b.append("Recursively defined type alias (");
 316                     long minLocation = typeAliasesAst.get(component[0]).location;
 317                     boolean first = true;
 318                     for(int u : component) {
 319                         DTypeAst typeAlias = typeAliasesAst.get(u);
 320                         if(first)
 321                             first = false;
 322                         else
 323                             b.append(", ");
 324                         b.append(typeAlias.name);
 325                         if(Locations.beginOf(typeAlias.location) < Locations.beginOf(minLocation))
 326                             minLocation = typeAlias.location;
 327                     }
 328                     b.append(").");
 329                     errorLog.log(minLocation, b.toString());
 330                 }
 331                 else
 332                     orderedTypeAliases.add(typeAliasesAst.get(component[0]));
 333             }
 334         }.findComponents();
 335
 336         if(errorLog.hasNoErrors()) {
 337             for(DTypeAst typeAlias : orderedTypeAliases) {
 338                 TypeAlias alias = (TypeAlias)module.getTypeDescriptor(typeAlias.name);
 339                 TypeTranslationContext context = createTypeTranslationContext();
 340                 for(int i=0;i<typeAlias.parameters.length;++i)
 341                     context.pushTypeVar(typeAlias.parameters[i]);
 342                 alias.body = typeAlias.type.toType(context, Kinds.metaVar());
 343                 for(int i=0;i<typeAlias.parameters.length;++i)
 344                     alias.parameters[i] = context.popTypeVar(typeAlias.parameters[i], null);
 345             }
 346         }
 347     }
 348
 349     public void processDataTypes(ArrayList<DDataAst> dataTypesAst) {
 350         ArrayList<Runnable> fieldAccessorGenerators = new ArrayList<Runnable>();
 351         for(DDataAst dataTypeAst : dataTypesAst) {
 352             TypeTranslationContext context = createTypeTranslationContext();
 353             TVar[] typeParameters = new TVar[dataTypeAst.parameters.length];
 354             for(int i=0;i<dataTypeAst.parameters.length;++i)
 355                 typeParameters[i] = context.addTypeVar(dataTypeAst.parameters[i]);
 356             Constructor[] constructors = new Constructor[dataTypeAst.constructors.length];
 357             String className = null;
 358             boolean external = false;
 359             for(DAnnotationAst annotation : dataTypeAst.getAnnotations()) {
 360                 if(annotation.id.text.equals("@JavaType")) {
 361                     if(annotation.parameters.length != 1 ||
 362                             !(annotation.parameters[0] instanceof ELiteral) ||
 363                             !(((ELiteral)annotation.parameters[0]).getValue() instanceof StringConstant))
 364                         errorLog.log(annotation.location, "Invalid parameters. Expected @JavaType \"className\".");
 365                     else {
 366                         className = ((StringConstant)((ELiteral)annotation.parameters[0]).getValue()).getValue().replace('.', '/');
 367                         external = true;
 368                         break;
 369                     }
 370                 }
 371             }
 372
 373             boolean trivialDataType = dataTypeAst.constructors.length == 1 &&
 374                     dataTypeAst.constructors[0].parameters.length == 1;
 375             if(className == null && !trivialDataType)
 376                 className = compilationContext.namingPolicy.getDataTypeClassName(dataTypeAst.name);
 377
 378             StandardTypeConstructor dataType = dataTypeAst.typeConstructor;
 379
 380             dataType.setType(Types.con(moduleName, dataTypeAst.name), typeParameters);
 381             dataType.setConstructors(constructors);
 382             if(!trivialDataType)
 383                 dataType.setTypeDesc(TypeDesc.forClass(className));
 384             if(!external || dataTypeAst.constructors.length > 0) {
 385                 dataType.isOpen = false;
 386             }
 387             dataType.external = external;
 388             dataTypes.add(dataType);
 389             for(int j=0;j<constructors.length;++j) {
 390                 ConstructorAst constructor = dataTypeAst.constructors[j];
 391                 String name = constructor.name.text;
 392                 Type[] parameterTypes = new Type[constructor.parameters.length];
 393                 for(int i=constructor.parameters.length-1;i>=0;--i)
 394                     parameterTypes[i] = context.toType(constructor.parameters[i]);
 395                 String javaName = constructors.length == 1 ? className
 396                         : compilationContext.namingPolicy.getConstructorClassName(name);
 397                 String[] fieldNames = null;
 398                 for(DAnnotationAst annotation : constructor.annotations)
 399                     if(annotation.id.text.equals("@JavaType")) {
 400                         try {
 401                             javaName = ((StringConstant)((ELiteral)annotation.parameters[0])
 402                                     .getValue()).getValue();
 403                         } catch(Exception e) {
 404                             errorLog.log(annotation.parameters[0].location, "Invalid annotation parameter.");
 405                         }
 406                     }
 407                     else if(annotation.id.text.equals("@FieldNames")) {
 408                         try {
 409                             EListLiteral literal = (EListLiteral)annotation.parameters[0];
 410                             fieldNames = new String[literal.getComponents().length];
 411                             for(int i=0;i<fieldNames.length;++i) {
 412                                 Expression component = literal.getComponents()[i];
 413                                 if(component instanceof EVar)
 414                                     fieldNames[i] = ((EVar)component).name;
 415                                 else if(component instanceof ELiteral)
 416                                     fieldNames[i] = ((StringConstant)((ELiteral)component).getValue()).getValue();
 417                             }
 418                         } catch(Exception e) {
 419                             errorLog.log(annotation.parameters[0].location, "Invalid annotation parameter.");
 420                             fieldNames = null;
 421                         }
 422                     }
 423
 424                 constructors[j] = new Constructor(constructor.location, dataType,
 425                         Name.create(moduleName, name),
 426                         parameterTypes, javaName);
 427                 constructors[j].fieldNames = fieldNames;
 428                 constructors[j].recordFieldNames = constructor.fieldNames;
 429             }
 430             if(constructors.length == 1) {
 431                 Constructor constructor = constructors[0];
 432                 if(constructor.recordFieldNames != null) {
 433                     fieldAccessorGenerators.add(new Runnable() {
 434                         @Override
 435                         public void run() {
 436                             Type in = Types.apply(dataType.name, dataType.parameters);
 437                             for(int i=0;i<constructor.recordFieldNames.length;++i) {
 438                                 Type out = constructor.parameterTypes[i];
 439                                 Constant accessor;
 440                                 if(trivialDataType)
 441                                     accessor = new SafeCoerce(dataType.parameters, in, out);
 442                                 else
 443                                     accessor = new CallJava(dataType.parameters, Types.NO_EFFECTS, out,
 444                                             new Type[] {in}, new StackItem[] {new ParameterStackItem(0, in)},
 445                                             new FieldRef(constructor.javaName, constructor.fieldNames != null ? constructor.fieldNames[i] : "c" + i,
 446                                                     javaTypeTranslator.toTypeDesc(out)),
 447                                             null);
 448                                 module.addFieldAccessor(constructor.recordFieldNames[i], accessor);
 449                             }
 450                         }
 451                     });
 452                 }
 453             }
 454         }
 455
 456         for(Runnable fieldAccessorGenerator : fieldAccessorGenerators)
 457             fieldAccessorGenerator.run();
 458     }
 459
 460     public void processTypeClasses(ArrayList<ProcessedDClassAst> typeClassesAst) {
 461         for(ProcessedDClassAst pClassAst : typeClassesAst) {
 462             DClassAst classAst = pClassAst.orig;
 463
 464             if(module.getTypeClass(classAst.name) != null) {
 465                 errorLog.log(classAst.location, "Class "+classAst.name+" has already been defined in this module.");
 466                 continue;
 467             }
 468
 469             TypeTranslationContext context = createTypeTranslationContext();
 470
 471             TPred[] classContext = new TPred[classAst.context.length];
 472             for(int i=0;i<classContext.length;++i)
 473                 classContext[i] = context.toTFuncApply(classAst.context[i]);
 474
 475             TVar[] parameters = new TVar[classAst.parameters.length];
 476
 477             if(classAst.name.equals("Functor") || classAst.name.equals("Monad")) {
 478                 // FIXME hack
 479                 parameters[0] = context.resolveTypeVariable(pClassAst.orig.location, classAst.parameters[0], Kinds.STAR_TO_STAR);
 480             }
 481             else {
 482                 for(int i=0;i<parameters.length;++i)
 483                     parameters[i] = context.resolveTypeVariable(pClassAst.orig.location, classAst.parameters[i], Kinds.metaVar());
 484             }
 485
 486             TCon con = Types.con(moduleName, classAst.name);
 487             TypeClass typeClass = new TypeClass(classAst.location,
 488                     classContext,
 489                     con,
 490                     compilationContext.namingPolicy.getTypeClassInterfaceName(con),
 491                     parameters,
 492                     Fundep.mapFundeps(classAst.parameters, classAst.fundeps));
 493
 494             THashMap<String, TypeClassMethod> methods = typeClass.methods;
 495             for(DValueTypeAst methodDecl : pClassAst.typeDeclarations) {
 496                 try {
 497                     Type type;
 498                     try {
 499                         type = context.toType(methodDecl.type);
 500                     } catch(SCLSyntaxErrorException e) {
 501                         errorLog.log(e.location, e.getMessage());
 502                         continue;
 503                     }
 504                     for(EVar name : methodDecl.names) {
 505                         typeClass.methodNames.add(name.name);
 506                         methods.put(name.name,
 507                                 new TypeClassMethod(typeClass, name.name,
 508                                         compilationContext.namingPolicy.getMethodName(name.name),
 509                                         type, Types.getArity(type),
 510                                         name.location)
 511                                 );
 512                     }
 513                 } catch(RuntimeException e) {
 514                     errorLog.setExceptionPosition(methodDecl.location);
 515                     throw e;
 516                 }
 517             }
 518
 519             for(String methodName : pClassAst.defaultImplementations.getValueNames()) {
 520                 String fullName = "_" + classAst.name + "_default_" + methodName;
 521                 ArrayList<DValueAst> defs = pClassAst.defaultImplementations.getDefinition(methodName);
 522
 523                 TypeClassMethod method = typeClass.methods.get(methodName);
 524                 if(method == null) {
 525                     errorLog.log(defs.get(0).location, "Method " + methodName + " is not defined in this class.");
 526                     continue;
 527                 }
 528                 method.setDefaultImplementation(Name.create(moduleName, fullName));
 529
 530                 valueDefinitionsAst.addDefinitions(fullName, defs);
 531                 supplementedTypeAnnotations.add(new SupplementedValueType(defs.get(0).location, fullName, method.getType()));
 532                 valueDefinitionsAst.setDerived(fullName);
 533             }
 534
 535             module.addTypeClass(classAst.name, typeClass);
 536         }
 537     }
 538
 539     private TypeTranslationContext createTypeTranslationContext() {
 540         return new TypeTranslationContext(compilationContext);
 541     }
 542
 543     public void processDerivingInstances(ArrayList<DDerivingInstanceAst> derivingInstancesAst,
 544             ArrayList<ProcessedDInstanceAst> instancesAst) {
 545         for(DDerivingInstanceAst derivingInstance : derivingInstancesAst) {
 546             String name = derivingInstance.name.name;
 547             TCon con;
 548             try {
 549                 con = Environments.getTypeClassName(compilationContext.environment, name);
 550             } catch (AmbiguousNameException e) {
 551                 errorLog.log(derivingInstance.name.location, e.getMessage());
 552                 continue;
 553             }
 554             if(con == null) {
 555                 errorLog.log(derivingInstance.name.location, "Couldn't resolve class " + name + ".");
 556                 continue;
 557             }
 558             InstanceDeriver deriver = InstanceDerivers.get(con);
 559             if(deriver == null)
 560                 errorLog.log(derivingInstance.location, "Doesn't know how to derive " + name + ".");
 561             else
 562                 deriver.derive(errorLog, compilationContext.environment, instancesAst, derivingInstance);
 563         }
 564     }
 565
 566     public void processInstances(ArrayList<ProcessedDInstanceAst> instancesAst) {
 567         THashSet<TPred> instanceClashCheckSet = new THashSet<TPred>();
 568         for(ProcessedDInstanceAst pInstanceAst : instancesAst) {
 569             DInstanceAst instanceAst = pInstanceAst.orig;
 570             try {
 571                 TypeTranslationContext context = createTypeTranslationContext();
 572
 573                 String name = instanceAst.name.name;
 574                 TCon typeClassCon;
 575                 try {
 576                     typeClassCon = Environments.getTypeClassName(compilationContext.environment, name);
 577                 } catch (AmbiguousNameException e) {
 578                     errorLog.log(instanceAst.name.location, e.getMessage());
 579                     continue;
 580                 }
 581                 if(typeClassCon == null) {
 582                     errorLog.log(instanceAst.name.location, "Couldn't resolve class " + name + ".");
 583                     continue;
 584                 }
 585                 TypeClass typeClass = compilationContext.environment.getTypeClass(typeClassCon);
 586                 pInstanceAst.typeClass = typeClass;
 587
 588                 if(instanceAst.types.length != typeClass.parameters.length) {
 589                     errorLog.log(instanceAst.location, "Wrong number of parameters to type class " + typeClassCon.name + ".");
 590                     continue;
 591                 }
 592                 Type[] parameters = new Type[instanceAst.types.length];
 593                 for(int i=0;i<parameters.length;++i)
 594                     parameters[i] = context.toType(instanceAst.types[i], typeClass.parameters[i].getKind() /* FIXME */);
 595                 TPred instance = Types.pred(typeClassCon, parameters);
 596
 597                 if(!instanceClashCheckSet.add(instance)) {
 598                     errorLog.log(instanceAst.location, "Duplicate definition of the instance " + instance + ".");
 599                     continue;
 600                 }
 601
 602                 TPred[] instanceContext = new TPred[instanceAst.context.length];
 603                 for(int i=0;i<instanceContext.length;++i)
 604                     instanceContext[i] = context.toTFuncApply(instanceAst.context[i]);
 605
 606                 String javaName = compilationContext.namingPolicy.getInstanceClassName(instance);
 607                 String instancePrefix = instance.toName() + "$";
 608
 609                 ValueRepository valueDefs = pInstanceAst.valueDefs;
 610
 611                 THashMap<String, MethodImplementation> methodImplementations =
 612                         new THashMap<String, MethodImplementation>();
 613                 for(String valueName : valueDefs.getValueNames()) {
 614                     String fullName = instancePrefix + valueName;
 615                     long loc = valueDefs.getDefinition(valueName).get(0).location;
 616                     valueDefinitionsAst.addFrom(valueDefs, valueName, fullName);
 617                     valueDefinitionsAst.setDerived(fullName);
 618                     /*valueDefinitionsAst.addAnnotation(fullName, new DAnnotationAst(new EVar("@private"),
 619                             Collections.<Expression>emptyList()));*/
 620                     TypeClassMethod method = typeClass.methods.get(valueName);
 621                     if(method == null) {
 622                         errorLog.log(loc, "Method " + valueName + " is not defined in the type class " + typeClass.name.name + ".");
 623                         continue;
 624                     }
 625                     Type type = method.getBaseType().replace(typeClass.parameters, parameters);
 626                     for(int i=instanceContext.length-1;i>=0;--i)
 627                         type = Types.constrained(instanceContext[i], type);
 628                     //System.out.println(valueName + " :: " + type);
 629                     supplementedTypeAnnotations.add(
 630                             new SupplementedValueType(loc, fullName, type));
 631                     methodImplementations.put(valueName,
 632                             new MethodImplementation(Name.create(moduleName, fullName), false));
 633                 }
 634
 635                 // Are all necessary methods defined
 636                 for(String methodName : typeClass.methods.keySet())
 637                     if(!methodImplementations.containsKey(methodName)) {
 638                         Name defaultImplementation = typeClass.methods.get(methodName).getDefaultImplementation();
 639                         if(defaultImplementation == null)
 640                             errorLog.log(instanceAst.location, "Method " + methodName + " is not defined.");
 641                         else
 642                             methodImplementations.put(methodName,
 643                                     new MethodImplementation(defaultImplementation, true));
 644                     }
 645
 646                 JavaTypeInstanceConstructor generator = new JavaTypeInstanceConstructor(javaName, instance, instanceContext);
 647                 if(instanceContext.length == 0)
 648                     generator.setHasStaticInstance(true);
 649
 650                 TypeClassInstance typeClassInstance =
 651                         new TypeClassInstance(instanceAst.location, typeClass, generator,
 652                                 generator.getTypeParameters(),
 653                                 instanceContext, instance, methodImplementations,
 654                                 javaName);
 655
 656                 generator.setInstance(typeClassInstance);
 657
 658                 module.addTypeClassInstance(typeClassCon, typeClassInstance);
 659             } catch(RuntimeException e) {
 660                 errorLog.setExceptionPosition(instanceAst.location);
 661                 throw e;
 662             }
 663         }
 664
 665         // Generate superclass functions
 666         for(ArrayList<TypeClassInstance> instanceArray : module.getTypeInstances().values())
 667             for(TypeClassInstance instance : instanceArray) {
 668                 try {
 669                     TypeClass typeClass = instance.typeClass;
 670                     int superCount = typeClass.context.length;
 671
 672                     instance.superExpressions = new SCLValue[superCount];
 673                     for(int i=0;i<superCount;++i) {
 674                         TPred type = (TPred)typeClass.context[i]
 675                                 .replace(typeClass.parameters, instance.instance.parameters);
 676                         SCLValue value = new SCLValue(Name.create(moduleName,
 677                                 instance.javaName.substring(instance.javaName.indexOf('$')+1) + "_super" + i));
 678                         //value.addProperty(PrivateProperty.INSTANCE);
 679                         module.addValue(value);
 680                         Expression expression = new EGetConstraint(instance.location, type);
 681                         value.setExpression(expression);
 682                         value.setType(Types.forAll(instance.generatorParameters, Types.constrained(instance.context, type)));
 683                         value.getProperties().add(new InlineProperty(instance.context.length, 0xffffffff));
 684                         //TypeUnparsingContext tuc = new TypeUnparsingContext();
 685                         // TODO error handling
 686                         instance.superExpressions[i] = value;
 687                     }
 688                 } catch(RuntimeException e) {
 689                     errorLog.setExceptionPosition(instance.getLocation());
 690                     throw e;
 691                 }
 692             }
 693     }
 694
 695     public void processJavaMethods(ArrayList<JavaMethodDeclaration> javaMethodDeclarations) {
 696         for(JavaMethodDeclaration javaMethod : javaMethodDeclarations) {
 697             String name = javaMethod.methodName.name;
 698             String javaName = name;
 699             ArrayList<DAnnotationAst> annotations =
 700                     valueDefinitionsAst.getAnnotations(name);
 701             boolean isPrivate = false;
 702             if(annotations != null) {
 703                 for(DAnnotationAst annotation : annotations)
 704                     if(annotation.id.text.equals("@JavaName")) {
 705                         String temp = AnnotationUtils.processStringAnnotation(errorLog, annotation);
 706                         if(temp != null)
 707                             javaName = temp;
 708                     }
 709                     else if(annotation.id.text.equals("@private")) {
 710                         AnnotationUtils.processTagAnnotation(errorLog, annotation);
 711                         isPrivate = true;
 712                     }
 713             }
 714
 715             Type type = createTypeTranslationContext().toType(javaMethod.type);
 716
 717             CallJava callJava = resolveMethod(
 718                     javaMethod.location,
 719                     javaMethod.className,
 720                     javaName,
 721                     type);
 722             if(callJava != null) {
 723                 NameExistenceChecks.checkIfValueExists(errorLog, javaMethod.location,
 724                         importedEnvironment, module, name);
 725                 SCLValue value = module.addValue(name, callJava);
 726                 value.definitionLocation = javaMethod.methodName.location;
 727                 if(isPrivate)
 728                     value.addProperty(PrivateProperty.INSTANCE);
 729             }
 730         }
 731     }
 732
 733     public void processRulesets(ArrayList<DRulesetAst> rulesetsAst) {
 734         for(DRulesetAst ruleset : rulesetsAst) {
 735             String constructorName = "create" + ruleset.name;
 736             supplementedTypeAnnotations.add(new SupplementedValueType(ruleset.location, constructorName, Types.functionE(Types.PUNIT, Types.PROC, ruleset.type)));
 737             try {
 738                 valueDefinitionsAst.add(new DValueAst(new EVar(constructorName), new EPreCHRRulesetConstructor(ruleset)));
 739             } catch (NotPatternException e) {
 740                 throw new InternalCompilerError(ruleset.location, e);
 741             }
 742         }
 743     }
 744
 745     /**
 746      * Convert a java class method into a {@link CallJava} instance.
 747      * Compilation errors are logged for failures in finding the named class or in accessing the method.
 748      * The return value for errors is {@code null}.
 749      *
 750      * @param loc  SCL source location
 751      * @param className  Name of the class
 752      * @param methodName  Name of the method
 753      * @param type  The expected SCL type of the method
 754      * @return  A new JavaCall instance, or null if the given method can not be instantiated.
 755      */
 756     private CallJava resolveMethod(long loc,
 757             String className, String methodName, Type type) {
 758         // Resolve class
 759         ClassRef classRef = classRefs.get(className);
 760         if(classRef == null) {
 761             if(classRefs.containsKey(className))
 762                 return null;
 763             classRef = javaReferenceValidator.getClassRef(className);
 764             classRefs.put(className, classRef);
 765             if(classRef == null) {
 766                 errorLog.log(loc, "Didn't find class " + className + ".");
 767                 return null;
 768             }
 769             if(!javaReferenceValidator.isPublic(classRef.getClass())) {
 770                 errorLog.log(loc, "Class " + className + " is not public.");
 771                 return null;
 772             }
 773
 774         }
 775
 776         // Resolve method
 777         List<MethodRef> methodRefs = classRef.getMethodRefs(methodName);
 778         if(methodRefs.isEmpty()) {
 779             errorLog.log(loc, "Didn't find any public method or field with name '" + methodName + "' from class " + className + ".");
 780             return null;
 781         }
 782
 783         ArrayList<CallJava> candidates = new ArrayList<CallJava>(2);
 784         for(MethodRef methodRef : methodRefs) {
 785             CallJava candidate = matchType(methodRef, type);
 786             if(candidate != null)
 787                 candidates.add(candidate);
 788         }
 789
 790         if(candidates.isEmpty()) {
 791             StringBuilder b = new StringBuilder();
 792             b.append("Didn't find any public method or field matching the type " + type + ". The following methods and fields were tried:");
 793             for(MethodRef methodRef : methodRefs) {
 794                 b.append("\n    ");
 795                 b.append(methodRef);
 796             }
 797             b.append("\nbut expected something like:");
 798             {
 799                 MultiFunction mFun = Types.matchFunction(type);
 800                 b.append("\n    public static ");
 801                 b.append(javaTypeTranslator.toTypeDesc(mFun.returnType).getFullName()).append(' ').append(methodName).append('(');
 802                 boolean first = true;
 803                 for(Type parameter : mFun.parameterTypes) {
 804                     if(first)
 805                         first = false;
 806                     else
 807                         b.append(", ");
 808                     b.append(javaTypeTranslator.toTypeDesc(parameter).getFullName());
 809                 }
 810                 b.append(')');
 811             }
 812             errorLog.log(loc, b.toString());
 813             return null;
 814         }
 815         else if(candidates.size() == 1)
 816             return candidates.get(0);
 817         else {
 818             // Try to find the best match
 819             ArrayList<CallJava> bestCandidates = new ArrayList<CallJava>(candidates.size());
 820             loop: for(CallJava candidate : candidates) {
 821                 Iterator<CallJava> it = bestCandidates.iterator();
 822                 while(it.hasNext()) {
 823                     CallJava b = it.next();
 824                     switch(candidate.compareTo(javaReferenceValidator, b)) {
 825                     case CallJava.LESS:
 826                     case CallJava.EQUAL:
 827                         continue loop;
 828                     case CallJava.GREATER:
 829                         it.remove();
 830                         break;
 831                     case CallJava.INCOMPARABLE:
 832                         break;
 833                     }
 834                 }
 835                 bestCandidates.add(candidate);
 836             }
 837
 838             if(bestCandidates.size() == 1) {
 839                 // System.out.println("Choose: " + bestCandidates.get(0).getMethodRef());
 840                 return bestCandidates.get(0);
 841             }
 842             else {
 843                 StringBuilder b = new StringBuilder();
 844                 b.append("Found more than one incomparable public methods the type " + type + ":");
 845                 for(CallJava callJava : bestCandidates) {
 846                     b.append("\n    ");
 847                     b.append(callJava.getMethodRef());
 848                 }
 849                 errorLog.log(loc, b.toString());
 850                 return null;
 851             }
 852         }
 853     }
 854
 855     private CallJava matchType(MethodRef methodRef, Type type) {
 856         //System.out.println("-----------------------------------------------------");
 857         //System.out.println("method: " + methodRef);
 858         //System.out.println("type: " + type);
 859
 860         type = Types.canonical(type);
 861         while(type instanceof TForAll)
 862             type = Types.canonical(((TForAll)type).type);
 863
 864         TypeDesc[] expectedParameterTypes = methodRef.getParameterTypes();
 865
 866         ArrayList<Type> parameterTypes = new ArrayList<Type>();
 867         Type effect = Types.NO_EFFECTS;
 868         Type returnType = type;
 869
 870         StackItem[] stackItems = new StackItem[expectedParameterTypes.length];
 871         TIntArrayList unresolvedItems = new TIntArrayList();
 872
 873         loop:
 874         for(int i=0;i<expectedParameterTypes.length;++i) {
 875             Type parameterType;
 876             TypeDesc providedParameterType;
 877             do {
 878                 if(effect != Types.NO_EFFECTS || !(returnType instanceof TFun)) {
 879                     while(i < expectedParameterTypes.length)
 880                         unresolvedItems.add(i++);
 881                     break loop;
 882                 }
 883                 TFun fun = (TFun)returnType;
 884                 parameterType = Types.canonical(fun.domain);
 885                 parameterTypes.add(parameterType);
 886                 effect = Types.canonical(fun.effect);
 887                 returnType = Types.canonical(fun.range);
 888                 providedParameterType = javaTypeTranslator.toTypeDesc(parameterType);
 889             } while(providedParameterType.equals(TypeDesc.VOID));
 890
 891             while(true) {
 892                 TypeDesc expectedParameterType = expectedParameterTypes[i];
 893                 if(javaReferenceValidator.isAssignableFrom(expectedParameterType,
 894                         providedParameterType)) {
 895                     stackItems[i] = new ParameterStackItem(
 896                             parameterTypes.size()-1,
 897                             parameterType);
 898                     break;
 899                 }
 900                 else
 901                     unresolvedItems.add(i++);
 902                 if(i == expectedParameterTypes.length) {
 903                     parameterTypes.remove(parameterTypes.size()-1);
 904                     returnType = Types.functionE(parameterType, effect, returnType);
 905                     break;
 906                 }
 907             }
 908         }
 909         //System.out.println("returnType: " + returnType);
 910         if(!unresolvedItems.isEmpty()) {
 911             ArrayList<TCon> concreteEffects = new ArrayList<TCon>();
 912             effect.collectConcreteEffects(concreteEffects);
 913
 914             for(TCon eff : concreteEffects) {
 915                 EffectConstructor effC = compilationContext.environment.getEffectConstructor(eff);
 916                 for(ThreadLocalVariable var : effC.getThreadLocalVariables()) {
 917                     for(int i=0;i<unresolvedItems.size();++i) {
 918                         int id = unresolvedItems.get(i);
 919                         if(!expectedParameterTypes[id].equals(TypeDesc.OBJECT) &&
 920                                 javaReferenceValidator.isAssignableFrom(expectedParameterTypes[id], var.type)) {
 921                             stackItems[id] = new ThreadLocalStackItem(var.variableName, var.type);
 922                             unresolvedItems.removeAt(i);
 923                             --i;
 924                         }
 925                     }
 926                 }
 927             }
 928
 929             if(!unresolvedItems.isEmpty())
 930                 return null;
 931             /*System.out.print("Unresolved: ");
 932             boolean first = true;
 933             for(int i=0;i<unresolvedItems.size();++i) {
 934                 if(first)
 935                     first = false;
 936                 else
 937                     System.out.print(", ");
 938                 System.out.print(expectedParameterTypes[unresolvedItems.get(i)]);
 939             }
 940             System.out.println();*/
 941         }
 942         OutputFilter filter = null;
 943         {
 944             TypeDesc providedReturnType = methodRef.getReturnType();
 945             if(!providedReturnType.equals(Constants.FUNCTION)) {
 946                 while(returnType instanceof TFun && effect == Types.NO_EFFECTS) {
 947                     TFun fun = (TFun)returnType;
 948                     Type parameterType = Types.canonical(fun.domain);
 949                     if(!javaTypeTranslator.toTypeDesc(parameterType).equals(TypeDesc.VOID))
 950                         return null;
 951                     parameterTypes.add(parameterType);
 952                     effect = Types.canonical(fun.effect);
 953                     returnType = Types.canonical(fun.range);
 954                 }
 955             }
 956             TypeDesc expectedReturnType =
 957                     javaTypeTranslator.toTypeDesc(returnType);
 958             if(!javaReferenceValidator.isAssignableFrom(expectedReturnType,
 959                     providedReturnType)) {
 960                 if(expectedReturnType.equals(TypeDesc.VOID)) {
 961                     if(providedReturnType.equals(TypeDesc.DOUBLE) || providedReturnType.equals(TypeDesc.LONG))
 962                         filter = Pop2OutputFilter.INSTANCE;
 963                     else
 964                         filter = PopOutputFilter.INSTANCE;
 965                 }
 966                 else if(expectedReturnType.equals(Constants.LIST)
 967                         && providedReturnType.equals(Constants.COLLECTION))
 968                     filter = ConvertToListFilter.INSTANCE;
 969                 else
 970                     return null;
 971             }
 972         }
 973
 974         CallJava result = new CallJava(
 975                 Types.freeVarsArray(type),
 976                 effect,
 977                 returnType,
 978                 parameterTypes.toArray(new Type[parameterTypes.size()]),
 979                 stackItems,
 980                 methodRef,
 981                 filter);
 982         //System.out.println(result.getType());
 983         return result;
 984     }
 985
 986     public void processMappingRelations(ArrayList<DMappingRelationAst> mappingRelationsAst) {
 987         for(DMappingRelationAst mappingRelation : mappingRelationsAst) {
 988             TypeAst[] parameterTypesAst = mappingRelation.parameterTypes;
 989             Type[] parameterTypes = new Type[parameterTypesAst.length];
 990             TypeTranslationContext typeTranslationContext = createTypeTranslationContext();
 991             for(int i=0;i<parameterTypes.length;++i)
 992                 parameterTypes[i] = parameterTypesAst[i].toType(typeTranslationContext, Kinds.STAR);
 993             MappingRelation mRel =
 994                     new MappingRelation(Name.create(moduleName, mappingRelation.name), parameterTypes);
 995             mRel.location = mappingRelation.location;
 996             if(module.addMappingRelation(mRel))
 997                 errorLog.log(mappingRelation.location, "Mapping relation " + mappingRelation.name +
 998                         " has already been defined.");
 999         }
1000     }
1001
1002     THashMap<String, DRuleAst> ruleAstMap = new THashMap<String, DRuleAst>();
1003
1004     public void processRules(ArrayList<DRuleAst> rulesAst) {
1005         // Find implied mapping relations
1006         for(DRuleAst ruleA : rulesAst) {
1007             ArrayList<Query> whereSection = ruleA.getSections().get("where");
1008             if(whereSection != null)
1009                 for(Query query : whereSection) {
1010                     if(!(query instanceof QPreGuard))
1011                         continue;
1012                     QPreGuard guard = (QPreGuard)query;
1013                     if(!(guard.guard instanceof EApply))
1014                         continue;
1015                     EApply apply = (EApply)guard.guard;
1016                     if(!(apply.getFunction() instanceof EVar))
1017                         continue;
1018
1019                     String name = ((EVar)apply.getFunction()).name;
1020                     if(module.getMappingRelation(name) != null)
1021                         continue;
1022
1023                     int arity = apply.getParameters().length;
1024                     Type[] parameterTypes = new Type[arity];
1025                     for(int i=0;i<arity;++i)
1026                         parameterTypes[i] = Types.metaVar(Kinds.STAR);
1027                     MappingRelation mRel =
1028                             new MappingRelation(Name.create(moduleName, name), parameterTypes);
1029                     mRel.location = query.location;
1030                     module.addMappingRelation(mRel);
1031                 }
1032             if(ruleAstMap.put(ruleA.name, ruleA) != null)
1033                 errorLog.log(ruleA.location, "Rule " + ruleA.name +
1034                         " has already been defined.");
1035         }
1036
1037         //
1038         for(String ruleName : ruleAstMap.keySet())
1039             processRule(ruleName);
1040     }
1041
1042     private TransformationRule processRule(String ruleName) {
1043         TransformationRule rule = module.getRule(ruleName);
1044         if(rule != null)
1045             return rule;
1046
1047         DRuleAst ruleAst = ruleAstMap.get(ruleName);
1048         if(ruleAst.alreadyProcessing) {
1049             errorLog.log(ruleAst.location, "Cyclic chain of rule extensions.");
1050             return null;
1051         }
1052
1053         TransformationRule[] extendsRules;
1054         int length = ruleAst.extendsNames.length;
1055         if(length == 0)
1056             extendsRules = TransformationRule.EMPTY_ARRAY;
1057         else {
1058             extendsRules = new TransformationRule[length];
1059             for(int i=0;i<length;++i) {
1060                 try {
1061                     String extendsName = ruleAst.extendsNames[i];
1062                     TransformationRule extendsRule;
1063                     if(ruleAstMap.containsKey(extendsName))
1064                         extendsRule = processRule(extendsName);
1065                     else {
1066                         extendsRule = Environments.getRule(compilationContext.environment, extendsName);
1067                         if(extendsRule == null)
1068                             errorLog.log(ruleAst.location,
1069                                     "Couldn't resolve rule name " + extendsName + ".");
1070                     }
1071                     extendsRules[i] = extendsRule;
1072                 } catch(AmbiguousNameException e) {
1073                     errorLog.log(ruleAst.location, e.getMessage());
1074                 }
1075             }
1076         }
1077
1078         final THashMap<SectionName, Query[]> sections = new THashMap<SectionName, Query[]>();
1079
1080         final TranslationContext context = createTranslationContext();
1081         if(length > 0) {
1082             THashMap<String, Variable> variables = context.getVariables();
1083             for(TransformationRule extendsRule : extendsRules) {
1084                 if(extendsRule == null)
1085                     continue;
1086                 for(Variable var : extendsRule.variables)
1087                     if(variables.put(var.getName(), var) != null) {
1088                         errorLog.log(ruleAst.location,
1089                                 "Variable " + var.getName() + " is defined in more than one base rule, which is not currently allowed.");
1090                     }
1091             }
1092         }
1093         context.pushExistentialFrame();
1094         ruleAst.getSections().forEachEntry(new TObjectObjectProcedure<String, ArrayList<Query>>() {
1095             @Override
1096             public boolean execute(String sectionNameString, ArrayList<Query> queries) {
1097                 Query[] resolvedQueries = new Query[queries.size()];
1098                 for(int i=0;i<resolvedQueries.length;++i)
1099                     resolvedQueries[i] = queries.get(i).resolve(context);
1100
1101                 SectionName sectionName = SectionName.getSectionName(sectionNameString);
1102                 if(sectionName == null)
1103                     context.getErrorLog().log(queries.get(0).location,
1104                             "Invalid section name " + sectionNameString + ".");
1105                 else
1106                     sections.put(sectionName, resolvedQueries);
1107                 return true;
1108             }
1109         });
1110
1111         Variable[] variables = context.getVariables().values().toArray(new Variable[context.getVariables().size()]);
1112
1113         rule = new TransformationRule(ruleAst.isAbstract,
1114                 Name.create(moduleName, ruleAst.name),
1115                 extendsRules,
1116                 sections, variables);
1117         rule.location = ruleAst.location;
1118         module.addRule(rule);
1119         return rule;
1120     }
1121
1122     public void addDataTypesToEnvironment() {
1123         for(StandardTypeConstructor dataType : dataTypes) {
1124             int constructorTag = 0;
1125             for(Constructor constructor : dataType.constructors) {
1126                 SCLValue value = new SCLValue(constructor.name);
1127                 value.definitionLocation = constructor.loc;
1128                 SCLConstructor sclConstructor =
1129                         new SCLConstructor(
1130                                 constructor.name.name,
1131                                 constructor.javaName,
1132                                 constructor.getTypeVariables(),
1133                                 constructorTag++,
1134                                 constructor.getReturnType(),
1135                                 constructor.fieldNames == null
1136                                         ? SCLConstructor.DEFAULT_FIELD_NAMES[constructor.getParameterTypes().length]
1137                                         : constructor.fieldNames,
1138                                 constructor.recordFieldNames,
1139                                 constructor.getParameterTypes());
1140                 if(dataType.constructors.length == 1 && (
1141                         dataType.getTypeDesc() == null ||
1142                         (dataType.constructors[0].javaName != null &&
1143                         dataType.constructors[0].javaName.equals(MethodBuilderBase.getClassName(dataType.getTypeDesc())))))
1144                     sclConstructor.setOnlyConstructor(true);
1145                 value.setValue(sclConstructor);
1146                 value.setType(constructor.getType());
1147
1148                 NameExistenceChecks.checkIfValueExists(errorLog, constructor.loc,
1149                         importedEnvironment, module, constructor.name.name);
1150                 if(module.addValue(value)) {
1151                     errorLog.log(constructor.loc,
1152                             "Value " + constructor.name.name + " is already defined.");
1153                 }
1154             }
1155         }
1156     }
1157
1158     public void addTypeClassesToEnvironment() {
1159         for(TypeClass typeClass : module.getTypeClasses()) {
1160             for(TypeClassMethod method : typeClass.methods.values()) {
1161                 SCLValue value = method.createValue();
1162                 value.definitionLocation = method.location;
1163                 NameExistenceChecks.checkIfValueExists(errorLog, Locations.NO_LOCATION,
1164                         importedEnvironment, module, value.getName().name);
1165
1166                 if(module.addValue(value)) {
1167                     String name = method.getName();
1168                     long location = Locations.NO_LOCATION;
1169                     ArrayList<DValueAst> definitions = valueDefinitionsAst.getDefinition(name);
1170                     if(definitions != null && !definitions.isEmpty())
1171                         location = definitions.get(0).location;
1172                     errorLog.log(location, "Value " + name + " is already defined.");
1173                 }
1174             }
1175         }
1176     }
1177
1178     public void preprocessValueDefinitions(ArrayList<DValueTypeAst> typeAnnotationsAst) {
1179         for(String name : valueDefinitionsAst.getValueNames()) {
1180             SCLValue value = new SCLValue(Name.create(moduleName, name));
1181
1182             long location = valueDefinitionsAst.getLocation(name);
1183             NameExistenceChecks.checkIfValueExists(errorLog, location,
1184                     importedEnvironment, module, value.getName().name);
1185             value.definitionLocation = location;
1186             if(module.addValue(value))
1187                 errorLog.log(location, "Value " + name + " is already defined.");
1188             if(valueDefinitionsAst.isDerived(name))
1189                 value.addProperty(DerivedProperty.INSTANCE);
1190         }
1191         for(DValueTypeAst valueTypeAst : typeAnnotationsAst)
1192             for(EVar name : valueTypeAst.names) {
1193                 SCLValue value = module.getValue(name.name);
1194                 if(value == null) {
1195                     errorLog.log(valueTypeAst.location, name.name + " is not defined.");
1196                     value = new SCLValue(Name.create(moduleName, name.name));
1197                     module.addValue(value);
1198                 }
1199                 value.definitionLocation = name.location;
1200             }
1201         for(String name : relationDefinitionsAst.getRelationNames()) {
1202             ConcreteRelation relation = new ConcreteRelation(name);
1203             module.addRelation(name, relation);
1204         }
1205     }
1206
1207     public void addValueDefinitionsToEnvironment(ArrayList<DValueTypeAst> typeAnnotationsAst) {
1208         THashMap<String, DValueTypeAst> typeMap = new THashMap<String, DValueTypeAst>();
1209         for(DValueTypeAst valueTypeAst : typeAnnotationsAst)
1210             for(EVar name : valueTypeAst.names) {
1211                 if(typeMap.containsKey(name.name))
1212                     errorLog.log(valueTypeAst.location, "Type of "+name.name+" has already been declared in this module.");
1213                 else
1214                     typeMap.put(name.name, valueTypeAst);
1215             }
1216
1217         THashMap<String, EVar> exportMap = null;
1218         if(moduleHeader != null && moduleHeader.export != null) {
1219             exportMap = new THashMap<String, EVar>();
1220             for(EVar export : moduleHeader.export)
1221                 if(exportMap.put(export.name, export) != null)
1222                     errorLog.log(export.location, "The symbol " + export.name + " is exported multiple times.");
1223         }
1224
1225         for(String name : valueDefinitionsAst.getValueNames()) {
1226             ArrayList<DValueAst> defs = valueDefinitionsAst.getDefinition(name);
1227             if(defs.size() != 1 || !(defs.get(0).value instanceof EPreCHRRulesetConstructor))
1228                 continue;
1229             try {
1230                 SCLValue value = module.getValue(name);
1231                 TranslationContext context = createTranslationContext();
1232                 Expression expression = context.translateCases2(defs);
1233                 value.setExpression(expression);
1234
1235                 if(exportMap != null && exportMap.remove(name) == null)
1236                     value.addProperty(PrivateProperty.INSTANCE);
1237             } catch(RuntimeException e) {
1238                 errorLog.setExceptionPosition(defs.get(0).location);
1239                 throw e;
1240             }
1241         }
1242         for(String name : valueDefinitionsAst.getValueNames()) {
1243             ArrayList<DValueAst> defs = valueDefinitionsAst.getDefinition(name);
1244             if(defs.size() == 1 && defs.get(0).value instanceof EPreCHRRulesetConstructor)
1245                 continue;
1246             try {
1247                 SCLValue value = module.getValue(name);
1248                 TranslationContext context = createTranslationContext();
1249                 Expression expression = context.translateCases2(defs);
1250                 value.setExpression(expression);
1251
1252                 DValueTypeAst valueTypeAst = typeMap.remove(name);
1253                 if(valueTypeAst != null)
1254                     value.setType(Types.closure(context.toType(valueTypeAst.type)));
1255
1256                 ArrayList<DAnnotationAst> annotations = valueDefinitionsAst.getAnnotations(name);
1257                 if(annotations != null)
1258                     for(DAnnotationAst annotation : annotations) {
1259                         handleAnnotation(value, defs, annotation);
1260                     }
1261                 if(exportMap != null && exportMap.remove(name) == null)
1262                     value.addProperty(PrivateProperty.INSTANCE);
1263             } catch(RuntimeException e) {
1264                 errorLog.setExceptionPosition(defs.get(0).location);
1265                 throw e;
1266             }
1267         }
1268         if(exportMap != null)
1269             for(EVar export : exportMap.values())
1270                 errorLog.log(export.location, "The symbol " + export.name + " is not defined in the module.");
1271         for(String name : relationDefinitionsAst.getRelationNames()) {
1272             ArrayList<DRelationAst> definitions = relationDefinitionsAst.getDefinition(name);
1273             if(definitions.size() > 1) {
1274                 errorLog.log(definitions.get(1).location,
1275                         "Does not yet support definition of relations by more than one rule.");
1276                 continue;
1277             }
1278
1279             DRelationAst definition = definitions.get(0);
1280             ConcreteRelation relation = (ConcreteRelation)module.getRelation(name);
1281             relation.location = definition.location;
1282             TranslationContext context = createTranslationContext();
1283             definition.translateTo(context, relation);
1284         }
1285     }
1286
1287     private TranslationContext createTranslationContext() {
1288         return new TranslationContext(compilationContext, null);
1289     }
1290
1291     private void handleAnnotation(SCLValue value, ArrayList<DValueAst> defs, DAnnotationAst annotation) {
1292         if(annotation.id.text.equals("@macro")) {
1293             value.setMacroRule(new StandardMacroRule());
1294         }
1295         else if(annotation.id.text.equals("@inline")) {
1296             try {
1297                 int arity = defs.get(0).lhs.getFunctionDefinitionPatternArity();
1298                 int phaseMask = 0xffffffff;
1299                 if(annotation.parameters.length > 0) {
1300                     phaseMask = Integer.parseInt(((EIntegerLiteral)annotation.parameters[0]).getValue());
1301                 }
1302                 value.addProperty(new InlineProperty(arity, phaseMask));
1303             } catch(NotPatternException e) {
1304                 errorLog.log(annotation.location, "Inline annotation is invalid: this is not a function.");
1305             }
1306         }
1307         else if(annotation.id.text.equals("@private")) {
1308             if(moduleHeader != null && moduleHeader.export != null)
1309                 errorLog.log(annotation.location, "Annotation @private is not used when module header contains export property.");
1310             value.addProperty(PrivateProperty.INSTANCE);
1311         }
1312         else if(annotation.id.text.equals("@deprecated")) {
1313             String description = "";
1314             if(annotation.parameters.length > 0) {
1315                 if(annotation.parameters.length > 1)
1316                     errorLog.log(annotation.location, "Invalid number of parameters, expected one string.");
1317                 else {
1318                     String temp = AnnotationUtils.extractString(annotation.parameters[0]);
1319                     if(temp == null)
1320                         errorLog.log(annotation.location, "Invalid parameter, expected one string.");
1321                     else
1322                         description = temp;
1323                 }
1324             }
1325             value.addProperty(new DeprecatedProperty(description));
1326         }
1327         else
1328             errorLog.log(annotation.location, "Unknown annotation.");
1329     }
1330
1331     public void addSupplementedTypeAnnotationsToEnvironment() {
1332         for(SupplementedValueType valueType : supplementedTypeAnnotations) {
1333             Type type = Types.closure(valueType.type);
1334             String name = valueType.name;
1335             SCLValue value = module.getValue(name);
1336             if(value == null)
1337                 errorLog.log(valueType.position,
1338                         name + " is not defined.");
1339             else if(value.getType()==null)
1340                 value.setType(type);
1341             else
1342                 errorLog.log(valueType.position,
1343                         "Type of "+name+" has already been declared in this module.");
1344         }
1345     }
1346
1347     public void addFixityToEnvironment(ArrayList<DFixityAst> fixityAst) {
1348         for(DFixityAst fixity : fixityAst) {
1349             for(EVar symbol : fixity.symbols) {
1350                 String name = symbol.name;
1351                 SCLValue value = module.getValue(name);
1352                 if(value == null)
1353                     errorLog.log(symbol.location,
1354                             name + " is not defined.");
1355                 else
1356                     value.setPrecedence(fixity.precedence);
1357             }
1358         }
1359     }
1360
1361     public void addCoverageBranchPoints() {
1362         branchPoints = new THashMap<String, BranchPoint[]>();
1363         BranchPointInjector injector = new BranchPointInjector();
1364         for(String valueName : valueDefinitionsAst.getValueNames()) {
1365             for(DValueAst valueAst : valueDefinitionsAst.getDefinition(valueName))
1366                 valueAst.value = injector.injectBranchPoint(valueAst.value);
1367             branchPoints.put(valueName, injector.getAndClearBranchPoints());
1368         }
1369     }
1370 }