Today a client requested me create a full portal for him (including a CMS, a Blog , a News Aggregator + LOGO & Android App )
guess how much he was ready pay for it ?
3,000,000 (iran Rial) in US dollar equlas to lower than 100$ :|

why they think we are doing magic ?

The crazy shenanigans you can do with C++ standard libs are fascinating.
Like implementig multithreading with just a foreach, and bindings which can make member function pointers to simple function pointers, and placeholders in bindings. Also lambda functions are cool.
Something between the lines:
my_crazy_class *tmp = new my_crazy_class(...);
std::vector<type> my_array = .....;
std::for_each(std::execution::par,my_array.begin(),my_array.end(),
[&](type in){
auto fn = std::bind( &my_crazy_class::my_crazy_fnc,*tmp,_1,random_static_value);
return fn(in);
});
ps:
It's pretty much pseudocode, and please don't do things like this, it's bad for your mental health.
pps:
I need to learn how to use this tools wisely.

code is ready to rock in production but they need documentation.

Maybe I am picky, but:
Some people made a "FileStorage" API where in the open method you have flags like READ, WRITE, APPEND... And they made it like when you check WRITE the API opens/overwites to an empty file.
And when someon made a github Issue about this behaviour, they flagged it as a feature request. I'm so anoyed by not being able to overwite my data, thats just rude. Like should I use an file storage API to overwrite data like this:
0- Save file inner structure (you can't extract it from the API)
1- Open the file, parse the structure
2- Find file to overwrite
3- Save all the mess again
4- write your own API
5- sigh