rtti

Based on one answer to an earlier post , I'm investigating the possibility of the following design TChildClass = class(TObject) private FField1: string; FField2: string; end; TMyClass = class(TObject) private FField1: TChildClass; FField2: TObjectList<TChildClass>; end; Now, in the real world, TMyClass will have 10 different lists like this, so I would like to be able to address these lists using RTTI. However, I'm not interested in the other fields of this class, so I need to check if a certain field is some sort of TObjectList. This is what I've got so far: procedure InitializeClass(RContext

I have a object with some TObjectList<>-fields that I try to encode as JSON with help form SuperObject . TLogs = TObjectList<TLog>; TMyObject = class(TObject) private FLogs: TLogs; end; Deep inside SuperObjects code, there is a ToClass procedure, iterating the fields and add them to the json result. In this loop, there is a check on the TRttiFields FieldType. If it's nil, it skips the object. for f in Context.GetType(Value.AsObject.ClassType).GetFields do if f.FieldType <> nil then begin v := f.GetValue(value.AsObject); result.AsObject[GetFieldName(f)] := ToJson(v, index); end My generic list

how to extract RTTI info about methods in Delphi records? is it possible by using new Rtti unit? There is no RTTI for methods on records, sorry. 来源： https://stackoverflow.com/questions/2489230/delphi-rtti-info-about-methods-in-records

Using Delphi 2010 and RTTI, I know how to get the class type of an object and how to get/set the value and type of an object's properties, but how do you determine which class in the inheritance chain a property came from? I want to use the properties of a base class differently than the main class. Consider this code: TClassBase = class(TObject) published property A: Integer; end; TClassDescendant = class(TClassBase) published property B: Integer; end; procedure CheckProperties(Obj: TObject); var ctx: TRttiContext; objType: TRttiType; Prop: TRttiProperty; begin ctx := TRttiContext.Create;

Does the extended RTTI in Delphi 2010 offer a way to list defined Class and Record Helpers at run time? As far as I know Delphi does not show a hint or warning when more than one class helper is defined for a class, class helper detection might be a helpful routine in 'quality assurance'. p.s. of course I know I should never ever use third party components or libraries without source code, which would make it easy to grep class helpers. Since class helpers only apply to a class based on what helper is "closest" in scope, a class simply cannot know that a helper exists. For example, you can

I'm building a shared library with f-no-rtti . Internally, this library throws std:invalid_argument and catches std::exception , but the catch clause is never entered. The following code reproduces the problem (g++ 4.2, Mac OS X 10.6): // library.cpp: exports f(), compiled with -fno-rtti #include <stdexcept> #include <iostream> extern "C" { void f() { try { throw std::invalid_argument("std::exception handler"); } catch( std::exception& e) { std::cout << e.what() << "\n"; } catch(...) { std::cout << "... handler\n"; } } } // main.cpp: the main executable, dynamically loads the library #include

Consider the following code: #include <iostream> #include <typeinfo> #include <type_traits> using namespace std; struct A { int data; }; struct B1 : A {}; struct B2 : virtual A {}; struct Base1 : virtual A {}; struct Base2 : virtual A {}; struct Derived : Base1, Base2 {}; int main() { cout << sizeof(B1) << endl; cout << sizeof(B2) << endl; cout << sizeof(Derived) << endl; cout << std::is_polymorphic<B1>::value << endl; cout << std::is_polymorphic<B2>::value << endl; cout << std::is_polymorphic<Derived>::value << endl; return 0; } On my system it prints 4 8 12 0 0 0 Which means that none of