# Guide to modern C++

- Essentials of Modern C++ Style [CppCon 2014](https://www.youtube.com/watch?v=xnqTKD8uD64&t=2304s)

- [Style Guides](https://lefticus.gitbooks.io/cpp-best-practices/content/03-Style.html)

- [Herb Stutter's style](https://herbsutter.com/elements-of-modern-c-style/)
- [Bjarne Stroustrup's C++ Style](https://www.stroustrup.com/bs_faq2.html)

## C++20
- Error : 
  - C2664 - cannot convert ... 'const[4] to char*'
  - C2132 expression didnot evalute to a constant
```C++
void myFn(char* data)
{
    std::cout << data;
    return;
}

int main()
{
    myFn("ABC");  ==> error
    myFn(const_cast<char*>("ABC"));  ==> OK
    std::cout << "Hello World!\n";
}

constexpr struct stIniEnumToFilenameMap LogNameMap[] =
{
    {CFileLocation::DEBUG_LOG,        const_cast<TCHAR*>("Dbg.log")},
    {CFileLocation::DEBUG_TIMING_LOG, const_cast<TCHAR*>("DbgTiming.log"},
    {CFileLocation::GUIEVENT_LOG,     const_cast<TCHAR*>("GUIEventLog.log"},
};
```

- range for loop `for each()`
```C++

for each (auto x in items){}  ==> error

for (auto x : items) {} ==> OK
```

- Error: C2440	'initializing': cannot convert from 'ATL::CA2CA' to 'std::basic_string<char,std::char_traits<char>,std::allocator<char>>'
```C++
std::string strModelName = hardwareIniMotionCard.GetString(osKey.str().c_str(), "Error", FALSE).GetString();  ==> OK - use CString().GetString()
```