internal override Expression ResolveEntityNames( ParserContext parser) { FunctionDefinition funcDef; // used in multiple places. FieldDefinition fieldDec; this.Root = this.Root.ResolveEntityNames(parser); Expression root = this.Root; string field = this.FieldToken.Value; if (root is NamespaceReference) { // already a fully qualified namespace, therefore imports don't matter. string fullyQualifiedName = ((NamespaceReference)root).Template.Name + "." + field; TopLevelEntity entity = this.Owner.FileScope.FileScopeEntityLookup.DoEntityLookup(fullyQualifiedName, parser.CurrentCodeContainer); if (entity != null) { return(ResolverPipeline.ConvertStaticReferenceToExpression(entity, this.FirstToken, this.Owner)); } NamespaceReferenceTemplate nrt = this.Owner.FileScope.FileScopeEntityLookup.DoNamespaceLookup(fullyQualifiedName, parser.CurrentCodeContainer); if (nrt != null) { return(new NamespaceReference(this.FirstToken, this.Owner, nrt)); } throw new ParserException(this, "Could not find class or function by the name of: '" + fullyQualifiedName + "'"); } if (root is ClassReference) { ClassDefinition cd = ((ClassReference)root).ClassDefinition; funcDef = cd.GetMethod(field, false); if (funcDef != null) { if (!funcDef.Modifiers.HasStatic) { string className = cd.NameToken.Value; string functionName = funcDef.NameToken.Value; throw new ParserException(this.DotToken, "'" + className + "." + functionName + "' is not a static method, but it is being used as though it is static."); } Node.EnsureAccessIsAllowed(this.FieldToken, this.Owner, funcDef); return(new FunctionReference(this.FirstToken, funcDef, this.Owner)); } fieldDec = cd.GetField(field, false); if (fieldDec != null) { if (!fieldDec.Modifiers.HasStatic) { throw new ParserException(this.DotToken, "Cannot make a static reference to a non-static field."); } Node.EnsureAccessIsAllowed(this.FieldToken, this.Owner, fieldDec); return(new FieldReference(this.FirstToken, fieldDec, this.Owner)); } // TODO: typeof(class name) is less error prone with localization conflicts. // However there's a Core.typeOf() method that sort of conflicts. // TODO: if this notation is kept, then this needs to be split into two class keywords // since they do different things. if (field == parser.Keywords.CLASS) { return(new ClassReferenceLiteral(this.FirstToken, cd, this.Owner)); } // TODO: nested classes, enums, constants // TODO: show spelling suggestions. throw new ParserException(this.FieldToken, "No static fields or methods named '" + field + "' on the class " + cd.NameToken.Value + "."); } if (root is BaseKeyword) { ClassDefinition thisClass = null; if (this.Owner != null) { if (this.Owner is FunctionDefinition) { thisClass = this.Owner.Owner as ClassDefinition; } else { thisClass = this.Owner as ClassDefinition; } } if (thisClass == null) { throw new ParserException(root, "'base' keyword can only be used inside classes."); } ClassDefinition cd = thisClass.BaseClass; if (cd == null) { throw new ParserException(root, "'base' keyword can only be used inside classes that extend from another class."); } FunctionDefinition fd = cd.GetMethod(field, true); if (fd == null) { throw new ParserException(this.DotToken, "Cannot find a method by that name in the base class chain."); } if (fd.Modifiers.HasStatic) { throw new ParserException(this.DotToken, "Cannot reference static methods using 'base' keyword."); } Node.EnsureAccessIsAllowed(this.DotToken, this.Owner, fd); return(new BaseMethodReference(this.FirstToken, this.DotToken, this.FieldToken, this.Owner)); } if (root is ThisKeyword) { ClassDefinition cd = null; TopLevelEntity owner = this.TopLevelEntity; if (owner is FunctionDefinition) { FunctionDefinition functionOwner = (FunctionDefinition)owner; if (functionOwner.Modifiers.HasStatic) { throw new ParserException(this.Root, "'this' keyword cannot be used in static methods."); } if (!(functionOwner.Owner is ClassDefinition)) { throw new ParserException(this.Root, "'this' keyword cannot be used in a function that isn't in a class."); } cd = (ClassDefinition)owner.Owner; } else if (owner is FieldDefinition) { if (((FieldDefinition)owner).Modifiers.HasStatic) { throw new ParserException(this.Root, "'this' keyword cannot be used in static fields."); } cd = (ClassDefinition)owner.Owner; } else if (owner is ConstructorDefinition) { if (((ConstructorDefinition)owner).Modifiers.HasStatic) { throw new ParserException(this.Root, "'this', keyword cannot be used in static constructors."); } cd = (ClassDefinition)owner.Owner; } else { throw new ParserException(this.Root, "'this' keyword must be used inside a class."); } funcDef = cd.GetMethod(field, true); if (funcDef != null) { if (funcDef.Modifiers.HasStatic) { throw new ParserException(this.DotToken, "This method is static and must be referenced by the class name, not 'this'."); } Node.EnsureAccessIsAllowed(this.DotToken, this.Owner, funcDef); return(new FunctionReference(this.FirstToken, funcDef, this.Owner)); } FieldDefinition fieldDef = cd.GetField(field, true); if (fieldDef != null) { if (fieldDef.Modifiers.HasStatic) { throw new ParserException(this.DotToken, "This field is static and must be referenced by the class name, not 'this'."); } Node.EnsureAccessIsAllowed(this.DotToken, this.Owner, fieldDef); return(new FieldReference(this.FirstToken, fieldDef, this.Owner)); } // TODO: show suggestions in the error message for anything close to what was typed. throw new ParserException(this.FieldToken, "The class '" + cd.NameToken.Value + "' does not have a field named '" + field + "'."); } if (this.Root is EnumReference) { EnumDefinition enumDef = ((EnumReference)this.Root).EnumDefinition; if (field == parser.Keywords.FIELD_ENUM_LENGTH) { return(new IntegerConstant(this.FirstToken, enumDef.Items.Length, this.Owner)); } if (field == parser.Keywords.FIELD_ENUM_MAX) { return(new SpecialEntity.EnumMaxFunction(this.FirstToken, enumDef, this.Owner)); } if (field == parser.Keywords.FIELD_ENUM_VALUES) { return(new SpecialEntity.EnumValuesFunction(this.FirstToken, enumDef, this.Owner)); } return(new EnumFieldReference(this.FirstToken, enumDef, this.FieldToken, this.Owner)); } // This is done here in the resolver instead of the parser because some unallowed // field names (such as .class) are valid. if (field == parser.Keywords.CLASS) { if (this.Root is Variable) { throw new ParserException(this.Root, "'" + ((Variable)this.Root).Name + "' is not a class."); } throw new ParserException(this.DotToken, ".class can only be applied to class names."); } parser.VerifyIdentifier(this.FieldToken); return(this); }
private void EnsureModifiersAndTypeSignatureConsistencyForClassMethods(TypeContext tc) { ClassDefinition classDef = (ClassDefinition)this.Owner; ClassDefinition baseClass = classDef.BaseClass; bool hasBaseClass = baseClass != null; if (hasBaseClass) { FieldDefinition hiddenField = baseClass.GetField(this.NameToken.Value, true); if (hiddenField != null) { throw new ParserException(this, "This function definition hides a field from a parent class."); } } if (!hasBaseClass) { if (this.Modifiers.HasOverride) { throw new ParserException(this, "Cannot mark a method as 'override' if it has no base class."); } } else { FunctionDefinition overriddenFunction = baseClass.GetMethod(this.NameToken.Value, true); if (overriddenFunction != null) { if (!this.Modifiers.HasOverride) { if (this.CompilationScope.IsCrayon) { // TODO: just warn if not present } else { throw new ParserException(this, "This function hides another function from a parent class. If overriding is intentional, use the 'override' keyword."); } } if (overriddenFunction.Modifiers.HasStatic) { throw new ParserException(this, "Cannot override a static method."); } if (overriddenFunction.Modifiers.AccessModifierType != this.Modifiers.AccessModifierType) { throw new ParserException(this, "This method defines a different access modifier than its overridden parent."); } if (overriddenFunction.Modifiers.AccessModifierType == AccessModifierType.PRIVATE) { throw new ParserException(this, "Cannot override a private method."); } if (overriddenFunction.Modifiers.HasInternal && overriddenFunction.CompilationScope != this.CompilationScope) { throw new ParserException(this, "Cannot override this method. It is marked as internal and is located in a different assembly."); } if (overriddenFunction.ResolvedReturnType != this.ResolvedReturnType) { if (overriddenFunction.ResolvedReturnType == tc.ANY && this.ResolvedReturnType == tc.OBJECT) { // This is fine. } else { throw new ParserException(this, "This function returns a different type than its overridden parent."); } } if (overriddenFunction.ArgTypes.Length != this.ArgTypes.Length) { throw new ParserException(this, "This function has a different number of arguments than its overridden parent."); } if (overriddenFunction.MinArgCount != this.MinArgCount) { throw new ParserException(this, "This function has a different number of optional arguments than its overridden parent."); } // TODO: if you are overridding a function between a statically and dynamically typed languagte, // the dynamic language should pick up the types from the statically typed language or the // statically typed language should require "object" types in its signature for the other direction. for (int i = 0; i < this.ArgTypes.Length; ++i) { ResolvedType expected = overriddenFunction.ResolvedArgTypes[i]; ResolvedType actual = this.ResolvedArgTypes[i]; if (actual != expected && !(actual == tc.OBJECT && expected == tc.ANY)) { throw new ParserException(this, "This function has arguments that are different types than its overridden parent."); } } } else { if (this.Modifiers.HasOverride) { throw new ParserException(this, "This function is marked as 'override', but there is no method in a parent class with the same name."); } } } }
internal override Expression ResolveTypes(ParserContext parser, TypeResolver typeResolver) { this.Root.ResolveTypes(parser, typeResolver); string field = this.FieldToken.Value; if (this.Root is EnumReference) { throw new System.NotImplementedException(); } ResolvedType rootType = this.Root.ResolvedType; TypeContext tc = parser.TypeContext; // TODO: all of this needs to be localized. switch (rootType.Category) { case ResolvedTypeCategory.NULL: throw new ParserException(this.DotToken, "Cannot dereference a field from null."); case ResolvedTypeCategory.ANY: // ¯\_(ツ)_/¯ this.ResolvedType = parser.TypeContext.ANY; return(this); case ResolvedTypeCategory.INTEGER: throw new ParserException(this.DotToken, "Integers do not have any fields."); case ResolvedTypeCategory.FLOAT: throw new ParserException(this.DotToken, "Floating point decimals do not have any fields."); case ResolvedTypeCategory.BOOLEAN: throw new ParserException(this.DotToken, "Booleans do not have any fields."); case ResolvedTypeCategory.STRING: switch (field) { case "length": this.ResolvedType = tc.INTEGER; if (this.Root is StringConstant) { return(new IntegerConstant(this.FirstToken, ((StringConstant)this.Root).Value.Length, this.Owner)); } return(this); case "contains": return(BuildPrimitiveMethod(tc.BOOLEAN, tc.STRING)); case "endsWith": return(BuildPrimitiveMethod(tc.BOOLEAN, tc.STRING)); case "indexOf": return(BuildPrimitiveMethod(tc.INTEGER, tc.STRING)); case "lower": return(BuildPrimitiveMethod(tc.STRING)); case "ltrim": return(BuildPrimitiveMethod(tc.STRING)); case "replace": return(BuildPrimitiveMethod(tc.STRING, tc.STRING, tc.STRING)); case "reverse": return(BuildPrimitiveMethod(tc.STRING)); case "rtrim": return(BuildPrimitiveMethod(tc.STRING)); case "split": return(BuildPrimitiveMethod(ResolvedType.ListOrArrayOf(tc.STRING), tc.STRING)); case "startsWith": return(BuildPrimitiveMethod(tc.BOOLEAN, tc.STRING)); case "trim": return(BuildPrimitiveMethod(tc.STRING)); case "upper": return(BuildPrimitiveMethod(tc.STRING)); // common mistakes case "join": throw new ParserException(this.DotToken, "Strings do not have a .join(list) method. Did you mean to do list.join(string)?"); case "size": throw new ParserException(this.DotToken, "Strings do not have a .size() method. Did you mean to use .length?"); default: throw new ParserException(this.DotToken, "Strings do not have that method."); } case ResolvedTypeCategory.LIST: ResolvedType itemType = rootType.ListItemType; switch (field) { case "length": this.ResolvedType = tc.INTEGER; return(this); case "filter": case "map": if (this.CompilationScope.IsStaticallyTyped) { // TODO: for Acrylic, this needs to have a way to indicate that resolution should be attempted // again once the function return type is known. throw new System.NotImplementedException(); } this.ResolvedType = tc.ANY; return(this); case "add": return(BuildPrimitiveMethod(tc.VOID, itemType)); case "choice": return(BuildPrimitiveMethod(tc.VOID)); case "clear": return(BuildPrimitiveMethod(tc.VOID)); case "clone": return(BuildPrimitiveMethod(rootType)); case "concat": return(BuildPrimitiveMethod(rootType, rootType)); case "contains": return(BuildPrimitiveMethod(tc.BOOLEAN, itemType)); case "insert": return(BuildPrimitiveMethod(tc.VOID, tc.INTEGER, itemType)); case "join": return(BuildPrimitiveMethodWithOptionalArgs(tc.STRING, 1, tc.STRING)); case "pop": return(BuildPrimitiveMethod(itemType)); case "remove": return(BuildPrimitiveMethod(tc.VOID, tc.INTEGER)); case "reverse": return(BuildPrimitiveMethod(tc.VOID)); case "shuffle": return(BuildPrimitiveMethod(tc.VOID)); case "sort": return(BuildPrimitiveMethod(tc.VOID)); // common mistakes case "count": case "size": throw new ParserException(this.DotToken, "Lists do not have a ." + this.FieldToken.Value + "() method. Did you mean to use .length?"); default: throw new ParserException(this.DotToken, "Lists do not have that method."); } case ResolvedTypeCategory.DICTIONARY: ResolvedType keyType = rootType.DictionaryKeyType; ResolvedType valueType = rootType.DictionaryValueType; switch (field) { case "length": this.ResolvedType = tc.INTEGER; return(this); case "clear": return(BuildPrimitiveMethod(tc.VOID)); case "clone": return(BuildPrimitiveMethod(rootType)); case "contains": return(BuildPrimitiveMethod(tc.BOOLEAN, keyType)); case "get": return(BuildPrimitiveMethodWithOptionalArgs(valueType, 1, keyType, valueType)); case "keys": return(BuildPrimitiveMethod(ResolvedType.ListOrArrayOf(keyType))); case "merge": return(BuildPrimitiveMethod(tc.VOID, rootType)); case "remove": return(BuildPrimitiveMethod(tc.VOID, keyType)); case "values": return(BuildPrimitiveMethod(ResolvedType.ListOrArrayOf(valueType))); default: throw new ParserException(this.DotToken, "Dictionaries do not have that field."); } case ResolvedTypeCategory.CLASS_DEFINITION: throw new ParserException(this.DotToken, "Class definitions do not have that field."); case ResolvedTypeCategory.FUNCTION_POINTER: switch (field) { case "invoke": return(BuildPrimitiveMethod(tc.ANY, ResolvedType.ListOrArrayOf(tc.ANY))); default: throw new ParserException(this.DotToken, "Fucntions do not have that field."); } case ResolvedTypeCategory.INSTANCE: FieldDefinition fieldDef = rootType.ClassTypeOrReference.GetField(field, true); if (fieldDef != null) { if (!Node.IsAccessAllowed(this, fieldDef)) { ClassDefinition cd = fieldDef.ClassOwner; throw new ParserException(FieldToken, "The field '" + cd.NameToken.Value + "." + this.FieldToken.Value + "' is not accessible from here due to its access scope."); } this.ResolvedType = fieldDef.ResolvedFieldType; return(this); } FunctionDefinition funcDef = rootType.ClassTypeOrReference.GetMethod(field, true); if (funcDef != null) { this.ResolvedType = ResolvedType.GetFunctionType(funcDef); return(this); } throw new ParserException(this.DotToken, "The class '" + rootType.ClassTypeOrReference.NameToken.Value + "' does not have a field called '" + field + "'."); default: throw new ParserException(this.DotToken, "This field does not exist."); } }