Static const map initialization list with struct?

Question

Code section:

struct id_s {
    std::string name1;
    std::string name2;
};

static const std::map<uint8_t, id_s> list = {
    { 0x00, { "Fred", "Apple" } },
    { 0x01, { "John", "Banana" } },
    { 0x02, { "Mark", "Mango" } }
};

int main()
{
    for(const auto& it: list) {
        std::cout<<it.first<<"\t"<<it.second.name1<<"\t"<<it.second.name2<<std::endl;
    }
     return 0;
}

Problem is that once initialized all fields are correctly assigned, except "John" and "Mark", which are left as "".

How to correctly assign this with C++11 initialization lists?

Output from VS 2013 debug console:

This is the correct way to assign the values using intializer list. Can you show your output(screen shot) from the console?. — Mantosh Kumar, Apr 03 '14 at 16:08
I've added a link to the screenshot, I can't embed as not enough reputation... — user3443139, Apr 03 '14 at 16:19
I have validated that this code does indeed behave as described in Visual Studio 2013. — Mooing Duck, Apr 03 '14 at 16:34
Visual Studio 2013 Update 2 fixes this bug, and it's still good in Update 3. — user3443139, Aug 26 '14 at 11:34

score 0 · Answer 1 · edited May 23 '17 at 12:17

This is the correct way to initialize.I have ran your program and used to print it on console using the following code

for(const auto& it: lst) {
 std::cout<<it.first<<"\t"<<it.second.name1<<"\t"<<it.second.name2<<std::endl;
}

Output

       Fred    Apple
0x1 John    Banana
0x2 Mark    Mango

I ran this program Linux machine. I am using gcc4.8.1 which is fully c++11 compliant.Well I have not used the VS2013 but if you are using it as above and not getting the correct initialized values, there could be problem/bug VS2013 as it may not have complete implementation of initializer list.

BTW you should not use the variable name which has defined in the standard(list). This is not a good practice.

EDIT

it looks like it is known bug in VS2013 and you can find the relevant information from the following SO post.

https://stackoverflow.com/a/19646517/2724703

Thanks. I did suspect it might be a VS2013 problem. Don't worry, the "list" variable was just used when I quickly created this question here. :) — user3443139, Apr 03 '14 at 16:32
@user3443139:Check out the my edited post. It looks like known bug in VS2013. — Mantosh Kumar, Apr 03 '14 at 16:34

score 0 · Accepted Answer · answered May 27 '14 at 13:41

0

Visual Studio 2013 Update 2 has just fixed this bug.

answered May 27 '14 at 13:41

user3443139

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Static const map initialization list with struct?

2 Answers2