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48 lines
1.3 KiB
Markdown
48 lines
1.3 KiB
Markdown
3 years ago
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# Guide to modern C++
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- Essentials of Modern C++ Style [CppCon 2014](https://www.youtube.com/watch?v=xnqTKD8uD64&t=2304s)
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- [Style Guides](https://lefticus.gitbooks.io/cpp-best-practices/content/03-Style.html)
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- [Herb Stutter's style](https://herbsutter.com/elements-of-modern-c-style/)
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- [Bjarne Stroustrup's C++ Style](https://www.stroustrup.com/bs_faq2.html)
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## C++20
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- Error :
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- C2664 - cannot convert ... 'const[4] to char*'
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- C2132 expression didnot evalute to a constant
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```C++
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void myFn(char* data)
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{
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std::cout << data;
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return;
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}
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int main()
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{
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myFn("ABC"); ==> error
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myFn(const_cast<char*>("ABC")); ==> OK
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std::cout << "Hello World!\n";
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}
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constexpr struct stIniEnumToFilenameMap LogNameMap[] =
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{
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{CFileLocation::DEBUG_LOG, const_cast<TCHAR*>("Dbg.log")},
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{CFileLocation::DEBUG_TIMING_LOG, const_cast<TCHAR*>("DbgTiming.log"},
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{CFileLocation::GUIEVENT_LOG, const_cast<TCHAR*>("GUIEventLog.log"},
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};
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```
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- range for loop `for each()`
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```C++
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for each (auto x in items){} ==> error
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for (auto x : items) {} ==> OK
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```
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- Error: C2440 'initializing': cannot convert from 'ATL::CA2CA' to 'std::basic_string<char,std::char_traits<char>,std::allocator<char>>'
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```C++
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std::string strModelName = hardwareIniMotionCard.GetString(osKey.str().c_str(), "Error", FALSE).GetString(); ==> OK - use CString().GetString()
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```
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