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Managed C++/CLI

 
Questionplease explain this lines of code Pin
Hiếu Ngô2-Aug-18 18:18
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AnswerRe: please explain this lines of code Pin
Richard MacCutchan2-Aug-18 21:47
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AnswerRe: please explain this lines of code Pin
Jochen Arndt2-Aug-18 22:29
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NewsC++/CLI support comes to ReSharper C++ Pin
John Schroedl23-Jul-18 6:22
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QuestionTo find the angle of turn in a car racing game in C++/SFML Pin
Tarun Jha21-Jul-18 23:39
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AnswerRe: To find the angle of turn in a car racing game in C++/SFML Pin
John Schroedl23-Jul-18 6:41
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Tarun Jha25-Jul-18 7:36
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QuestionSmall RAII-like cleanup class in C++/CLI Pin
John Schroedl15-Jun-18 9:08
professionalJohn Schroedl15-Jun-18 9:08 
In native code, we often use helper classes to save a reference to a member, set its value and reset it in destruction. standard stuff.

Unfortunately, I haven't found a good way in a ref class to do the same and I'm hoping for some tips here.

Since I cannot hold a reference to a member of a managed object as a member of another object, I tried using a tracking reference. Unfortunately, that results in an similar error:

error C3160: 'System::Boolean ^%': a data member of a managed class cannot have this type
note: an interior reference can never be allocated on the gc heap


An example I hope to get working...

ref class Foo { bool m_guard; . . . }

ref class PushBool sealed {
  bool ^% m_tref;
public:
   PushBool(bool ^% b, bool newVal) : m_tref(b), m_oldval(b) { b = newVal; }
   ~PushBool() { m_tref = m_oldval; }
};

usage...

void Foo::work() {
   if (m_guard) return;
   PushBool no_reentry(m_guard, true);
   ...
   // Resets m_flag to original value here.
}


Do any of the C++/CLI devs here have advice on handling this? I can probably concoct a way to make it work but was hoping for a reusable utility class.

John
QuestionInformation Edit Source code for c++ Pin
Member 1165875229-May-18 19:48
memberMember 1165875229-May-18 19:48 
AnswerRe: Information Edit Source code for c++ Pin
Richard MacCutchan29-May-18 21:05
protectorRichard MacCutchan29-May-18 21:05 
AnswerRe: Information Edit Source code for c++ Pin
Jochen Arndt30-May-18 2:55
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QuestionError On a Project I'm Working On. (Sorry If Not descriptive enough, 1st time) Pin
CyberFaggot9-May-18 15:53
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AnswerRe: Error On a Project I'm Working On. (Sorry If Not descriptive enough, 1st time) Pin
Richard MacCutchan11-May-18 21:19
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QuestionPrint causes in afxtls.cpp Pin
Erich Ruth19-Apr-18 5:37
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AnswerRe: Print causes in afxtls.cpp Pin
Richard Andrew x6413-May-18 7:22
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QuestionWhat is the alternative of _kbhit_ in linux ? Pin
Tarun Jha16-Apr-18 4:04
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AnswerRe: What is the alternative of _kbhit_ in linux ? Pin
Maria Okta25-Jul-18 19:23
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QuestionMore Than One Operator "+" Matches These Operands Pin
Paramu197313-Apr-18 5:26
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QuestionRe: More Than One Operator "+" Matches These Operands Pin
Richard MacCutchan13-Apr-18 5:51
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AnswerRe: More Than One Operator "+" Matches These Operands Pin
Paramu197313-Apr-18 6:05
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GeneralRe: More Than One Operator "+" Matches These Operands Pin
Richard MacCutchan13-Apr-18 6:40
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GeneralRe: More Than One Operator "+" Matches These Operands Pin
Paramu197313-Apr-18 14:18
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QuestionHow to access the ref class declared DataTable ? Pin
Paramu197311-Apr-18 21:10
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SuggestionRe: How to access the ref class declared DataTable ? Pin
Richard MacCutchan11-Apr-18 22:53
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