How do i find the struct name from the instance?

Asked Mar 08 '18 at 14:31

Active Mar 08 '18 at 16:27

Viewed 76 times

I have user-defined struct

template < class T >
struct OutputValue : public OutputBase 
{
 ..
}

and

template < class T >
struct OutputValueRange : public OutputValue<T> 
{
 ..
}

Now I have declared two member variables

OutputValue<double>             m_dStimulatedAudioLatency;
OutputValueRange<double>        m_dDecodeAudioLatency;

I need to get the struct name of the member variables.Expected output is

m_dStimulatedAudioLatency.structname() = OutputValue
m_dDecodeAudioLatency.structname() = OutputValueRange

I tried doing-

How can I get the class name from a C++ object?

but I got something like this as output

   class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char>>

Please help me out with this.

asked Mar 08 '18 at 14:31

Saylee Lad

your link points to a question. Did you wanted to link the answer? Anyhow your code should be included in your question – 463035818_is_not_an_ai Mar 08 '18 at 14:33
1

There is no reflection (yet) in C++, that data is unavailable unless you provide it by yourself one way or another – Slava Mar 08 '18 at 14:34
I tried the solution in that link, but didn't get – Saylee Lad Mar 08 '18 at 14:36
I didn't get u @Slava – Saylee Lad Mar 08 '18 at 14:37
3

Note that [`std::type_info::name`](http://en.cppreference.com/w/cpp/types/type_info/name) returns the name of a type *in some form*. There is no restrictions or guaranties, other than it's a null terminated character string. And that's the only portable solution, as far as I know. Otherwise, you need to come up with your own scheme. – François Andrieux Mar 08 '18 at 14:38
there is no "the solution" in your link, but it points to a question with several simliar albeit different answers – 463035818_is_not_an_ai Mar 08 '18 at 14:39
Which part you do not get? What is reflection? Read here https://en.wikipedia.org/wiki/Reflection_(computer_programming) – Slava Mar 08 '18 at 14:39
What is `...structname() = value;` supposed to do? – Galik Mar 08 '18 at 14:42
I somehow need to get the name of the struct, so"...structname() = value;"is my expected output – Saylee Lad Mar 08 '18 at 14:44
1

what type is `structname()` output? – Killzone Kid Mar 08 '18 at 14:52
How do you plan to use said type name? To print it or to declare new variables? – HolyBlackCat Mar 08 '18 at 16:26
Why do you need the type name during run-time? – Thomas Matthews Mar 08 '18 at 16:38
What code are you running to get the output that you say you are getting when you try the method you linked? Because that looks like it's the correct output for if you were getting the type of a std::string instead of one of your own classes... – Sean Burton Mar 08 '18 at 16:54

How do i find the struct name from the instance?

0 Answers0