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