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Yesterday, 03:11 PM

gulshannegi started a thread C++ IDE Query in Visual C++ Programming

Hello Everyone, nowadays I am learning Cpp. and I am confused between C++ ideas like Code Blocks, Dev C++, Visual Studio Code.I Have Searched this...

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0 replies | 45 view(s)
Yesterday, 08:31 AM

John E started a thread Viewing breakpoints when NOT in Debug mode in Visual C++ Programming

Bback in the good old days of VC8, if I was editing a project (i.e. not in compile mode or debug mode etc) the bottom bit of my edit window used to...

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0 replies | 62 view(s)
Yesterday, 08:10 AM

2kaud replied to a thread std::vector::reserve() in C++ (Non Visual C++ Issues)

John, please don't ask different questions in the same post. It's better to start a new post for each new question.

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3 replies | 74 view(s)
Yesterday, 07:52 AM

John E replied to a thread std::vector::reserve() in C++ (Non Visual C++ Issues)

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3 replies | 74 view(s)
Yesterday, 07:29 AM

2kaud replied to a thread std::vector::reserve() in C++ (Non Visual C++ Issues)

The assert is correct even if reserve is used. All reserve() does is to allocate memory (which MSVC does). It doesn't add any elements. If you just...

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3 replies | 74 view(s)
Yesterday, 04:34 AM

John E started a thread std::vector::reserve() in C++ (Non Visual C++ Issues)

This actual object type is more complicated but I still see the problem, even with a simple int -so here goes:- std::vector<int> vect; int...

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3 replies | 74 view(s)
Yesterday, 04:15 AM

2kaud replied to a thread Template class inside a vector in C++ (Non Visual C++ Issues)

NO. Don't do it. Don't use a std::string (or any non POD type) in a union. If you want these three types, use a std::variant with C++17. I know...

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19 replies | 267 view(s)
March 1st, 2021, 08:15 PM

Arjay replied to a thread Template class inside a vector in C++ (Non Visual C++ Issues)

If you haven't used an Object Relational Mapper (ORM) before you may want to check it out. I see a few available for c++. If they are anything like...

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19 replies | 267 view(s)
March 1st, 2021, 02:58 PM

wolle replied to a thread Template class inside a vector in C++ (Non Visual C++ Issues)

You can create a union of these 3 types using std::variant. If you declare a variable of that union type, you can check which of the types is stored...

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19 replies | 267 view(s)
March 1st, 2021, 02:53 PM

OneEyeMan replied to a thread Template class inside a vector in C++ (Non Visual C++ Issues)

Thx.

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19 replies | 267 view(s)
March 1st, 2021, 02:38 PM

VictorN replied to a thread Template class inside a vector in C++ (Non Visual C++ Issues)

OK I'll delete your new thread.

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19 replies | 267 view(s)
March 1st, 2021, 02:34 PM

OneEyeMan replied to a thread Template class inside a vector in C++ (Non Visual C++ Issues)

Sorry, I just reposted it in the other forum. Please either delete the new posting or put this back and close it. Thank you and sorry for the...

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19 replies | 267 view(s)
March 1st, 2021, 02:32 PM

VictorN replied to a thread Template class inside a vector in C++ (Non Visual C++ Issues)

Visual C++ Programming forum]

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19 replies | 267 view(s)
March 1st, 2021, 02:30 PM

VictorN replied to a thread Template class inside a vector in C++ (Non Visual C++ Issues)

Please, don't do it! I'll just move this thread...

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19 replies | 267 view(s)
March 1st, 2021, 02:26 PM

OneEyeMan replied to a thread Template class inside a vector in C++ (Non Visual C++ Issues)

Hi, Yes, that is what I will do. I will create a posting in the other forum. Thank you.

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19 replies | 267 view(s)
March 1st, 2021, 02:21 PM

VictorN replied to a thread Template class inside a vector in C++ (Non Visual C++ Issues)

Then sorry! :sick: However, in such a case you should have posted this question in some other C/C++ forum, NOT in the Visual C++ one!

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19 replies | 267 view(s)
March 1st, 2021, 02:14 PM

OneEyeMan replied to a thread Template class inside a vector in C++ (Non Visual C++ Issues)

Hi, Never try to write something too fast and expect a good answer. And never write it when you are about to fall asleep. ;-) I want a...

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19 replies | 267 view(s)
March 1st, 2021, 02:06 PM

VictorN replied to a thread Template class inside a vector in C++ (Non Visual C++ Issues)

Since you get your data from a database then it is a good reason (as 2kaud already pointed out) to use the VARIANT (or the classes that encapsulate...

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19 replies | 267 view(s)
March 1st, 2021, 01:31 PM

OneEyeMan replied to a thread Template class inside a vector in C++ (Non Visual C++ Issues)

Hi Yes, everything is just a set of characters. I think that is what I will do. Except that if the DB contains the number - it will be...

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19 replies | 267 view(s)
March 1st, 2021, 06:06 AM

wolle replied to a thread Template class inside a vector in C++ (Non Visual C++ Issues)

An alternative to what 2kaud suggests is to go for an object-oriented design. In that case, you would replace T with a base class type. Then you...

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19 replies | 267 view(s)
March 1st, 2021, 04:45 AM

2kaud replied to a thread Template class inside a vector in C++ (Non Visual C++ Issues)

In which case you can't use templates. If the compiler doesn't know the type at compile time, you're very limited as to what you can do. C++ is a...

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19 replies | 267 view(s)
March 1st, 2021, 04:14 AM

OneEyeMan replied to a thread Template class inside a vector in C++ (Non Visual C++ Issues)

Hi, Well, I don't know what type it will be, hence the type field inside the structuyou. I will know it at run-time when I get the row. ...

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19 replies | 267 view(s)
March 1st, 2021, 02:13 AM

OneEyeMan replied to a thread Template class inside a vector in C++ (Non Visual C++ Issues)

Hi, error C3203: unspecialized class template can't be used as a template argument for template parameter '_Ty', expected a real type ...

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19 replies | 267 view(s)
March 1st, 2021, 02:13 AM

wolle replied to a thread Template class inside a vector in C++ (Non Visual C++ Issues)

You must specify the typename T of TableRow. Say you want it to be an int you do, std::vector<TableRow<int>> row;

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19 replies | 267 view(s)
March 1st, 2021, 01:59 AM

VictorN replied to a thread Template class inside a vector in C++ (Non Visual C++ Issues)

What error do you get?

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19 replies | 267 view(s)
February 28th, 2021, 11:01 PM

OneEyeMan started a thread Template class inside a vector in C++ (Non Visual C++ Issues)

Hi, ALL, What would be the best solution for the following problem: Let's say I have a table in the database. And in my C++ code I have a...

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19 replies | 267 view(s)

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