How to convert std::string to lower case?

Question

I want to convert a std::string to lowercase. I am aware of the function tolower(), however in the past I have had issues with this function and it

Answer 1

Use fplus::to_lower_case() from fplus library.

Search to_lower_case in fplus API Search

Example:

fplus::to_lower_case(std::string("ABC")) == std::string("abc");