initializer lists and user-defined containers

[jfindlay]

Is it possible to populate a container with an initializer list? I am
not too particular about how hackish or ugly any suggestions might be,
I'm simply interested in investigating possible elegancies (or
perversities) for an initializer list.

const container<double> array = mitigating_struct<double>() = {pi, e,
phi, gamma, 0.0042};
// container is magically filled with initalizer list members

Of course, something without an explicit temporary would be more ideal,
but perhaps beyond the realm of C++.


Justin

 

[Gianni Mariani]

Is it possible to populate a container with an initializer list? I am
not too particular about how hackish or ugly any suggestions might be,
I'm simply interested in investigating possible elegancies (or
perversities) for an initializer list.

const container<double> array = mitigating_struct<double>() = {pi, e,
phi, gamma, 0.0042};
// container is magically filled with initalizer list members

Of course, something without an explicit temporary would be more ideal,
but perhaps beyond the realm of C++.

It sounds like this is probably not what you want but it should be
interesting anyway.

http://bdsoft.com/tools/initutil.html

 

[Ioannis Vranos]

Is it possible to populate a container with an initializer list? I am
not too particular about how hackish or ugly any suggestions might be,
I'm simply interested in investigating possible elegancies (or
perversities) for an initializer list.

const container<double> array = mitigating_struct<double>() = {pi, e,
phi, gamma, 0.0042};
// container is magically filled with initalizer list members

Of course, something without an explicit temporary would be more ideal,
but perhaps beyond the realm of C++.

You may use a built in array:


int array[]={1,2,3,4,5,6,7};

vector<int> v(array, array+7);



or using a temp:


vector<int> v;

{
int temp[]={1,2,3,4,5,6,7};

v.assign(temp, temp+7);
}

 

[Ioannis Vranos]

You may use a built in array:


int array[]={1,2,3,4,5,6,7};

vector<int> v(array, array+7);



or using a temp:


vector<int> v;

{
int temp[]={1,2,3,4,5,6,7};

v.assign(temp, temp+7);
}

Also check this:

http://groups.google.com/[email protected]#link2

 

[Thorsten Ottosen]

| Is it possible to populate a container with an initializer list? I am
| not too particular about how hackish or ugly any suggestions might be,
| I'm simply interested in investigating possible elegancies (or
| perversities) for an initializer list.
|
| const container<double> array = mitigating_struct<double>() = {pi, e,
| phi, gamma, 0.0042};
| // container is magically filled with initalizer list members
|
| Of course, something without an explicit temporary would be more ideal,
| but perhaps beyond the realm of C++.

maybe boost.assign will be just what you want (see www.boost.org) It will be
in the next boost release, but you can
already get it from the main cvs if you want.

Shortly put (and among other ways), it allows you to say

const container<double> array = list_of<double>( pi )( e )( phi )( gamma )(
0.00042 );

br

Thorsten