Type conversion on container templates

[Alir3z4]

Actually i did alot changing on code and googling, if it's make you feel better, i suffering myself to don't ask a question!
But i have to do :|

I have c++ class with a this function

std::string addUri(std::vector<std::string> uris, std::map<std::string, std::string> options);

std::string addUri(std::vector<std::string> uris, std::map<std::string, std::string> options);

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All i want to do is make a qt wrap function for it
Like:

QString addUri(QVector<QString> uris, QMap<QString, QString> options);

QString addUri(QVector<QString> uris, QMap<QString, QString> options);

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The wrap one isn't right
I will apperciate to help me in this conversion
tahnks

[ChrisW67]

What's "not right" about it?

[amleto]

passing std::vector<std::string> uris, std::map<std::string, std::string> options by value is a lot wwrse than passing most Qt types by value. You should be passing stl containers by const ref, not value.

If you conversion from stl to Qt is not correct, then you should show us your attempt at that code.

[Alir3z4]

Here you can see the source code, it's on the git
yoDownet/yoDownloaders/aria2c.h
aria2c.h is a c++ source, which i wan't to make a qt function wraper for it.
there is a qt/class called Downloader which my program access to aria2c.h throght it.
i don't know how to implement such function to handle type conversion.

QString addUri(QVector<QString> uris, QMap<QString, QString> options);

QString addUri(QVector<QString> uris, QMap<QString, QString> options);

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i hope i explained my point as well

##update:
i think i didn't push the local git repo to remote, that's why the Downloader class isn't available on the git :|

[amleto]

There are several steps:
How do you convert QString to std::string?
How do you convert QVector to std::vector?
How do you convert QMap<QString, QString> to std::map<std::string, std::string>?

QString qs("abc");
std::string x(qs.toStdString());

QVector<QString> = qsv;
qsv.push_back(qs);

std::vector<std::string> sv;
sv.push_back(qs.toStdString());

or

sv.resize(qsv.size());
sv[some_index] = qsv[some_index].toStdString();

etc.

if you feel adventurous, you can do it in very few lines with std::transform and a suitable functor

[Alir3z4]

The actual thing i wanna do is making conversion at the template argument, not getting them one by one!
like:

const QString addUri(const QVector< const std::string(QString::toStdString()) > uris);

const QString addUri(const QVector< const std::string(QString::toStdString()) > uris);

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huh? what are you talking about dah?
but all i've got every time is delicious error :|

[wysota]

I'm sorry, what exactly is the problem? You have problems with function signature or with function body? What is the error you are getting?

[Alir3z4]

I'm sorry, what exactly is the problem? You have problems with function signature or with function body? What is the error you are getting?

i didn't even implement the function body
this is the error!

make: Entering directory `/home/alireza/dev/qt/yoDownet-build-desktop-Qt_in_PATH_Debug'
g++ -c -pipe -g -Wall -W -D_REENTRANT -DQT_SQL_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/share/qt/mkspecs/linux-g++ -I../yoDownet -I/usr/include/QtCore -I/usr/include/QtGui -I/usr/include/QtSql -I/usr/include -I. -I. -I../yoDownet -I. -o downloader.o ../yoDownet/downloader.cpp
In file included from ../yoDownet/downloader.cpp:1:0:
../yoDownet/downloader.h:17:77: error: template argument 1 is invalid
make: Leaving directory `/home/alireza/dev/qt/yoDownet-build-desktop-Qt_in_PATH_Debug'
make: *** [downloader.o] Error 1
22:36:00: The process "/usr/bin/make" exited with code 2.
Error while building project yoDownet (target: Desktop)
When executing build step 'Make'

make: Entering directory `/home/alireza/dev/qt/yoDownet-build-desktop-Qt_in_PATH_Debug'
g++ -c -pipe -g -Wall -W -D_REENTRANT -DQT_SQL_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/share/qt/mkspecs/linux-g++ -I../yoDownet -I/usr/include/QtCore -I/usr/include/QtGui -I/usr/include/QtSql -I/usr/include -I. -I. -I../yoDownet -I. -o downloader.o ../yoDownet/downloader.cpp
In file included from ../yoDownet/downloader.cpp:1:0:
../yoDownet/downloader.h:17:77: error: template argument 1 is invalid
make: Leaving directory `/home/alireza/dev/qt/yoDownet-build-desktop-Qt_in_PATH_Debug'
make: *** [downloader.o] Error 1
22:36:00: The process "/usr/bin/make" exited with code 2.
Error while building project yoDownet (target: Desktop)
When executing build step 'Make'

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Don't tell me give us the source code, coz the whole header file goes to 5 lines :|

[wysota]

And the exact line triggering the error (downloader.h:17 and :77)?