Add a lint to enforce the naming convention in README

[chengcli]

Currently, this repo uses cpplint to enforce c++ style. But cpplint does not check naming conventions. Is it possible to find a lint library that check cpp naming convention? Basically, I would like to enforce:

Name your folders and files

• use a singular simple noun for folder names
• avoid compound nouns for folder names
• you can use compound nouns or phrases for files names
• individual words in a compound nouns for phrase should be concatenated by underscore

Name your variables and classes

• use low case letters for variables
• you can use compound nouns or phrases
• compound nouns for phrase should be concatenated by underscore. This is called the snake case
• if a compound noun is used for class name, capitalize each word in the compound noun.
  This is called the upper camel case
• if a variable is a private member of a class, append the variable name with an
  underscore

Name your funcions

• functions names are usualy verbal phrases
• standalone functions should use snake case
• public class member functions should use upper camel case
• private class member functions should use lower camel case in which the first word
  in a phase is not capitalized and the rest words are capitalized

[happysky19]

How about this one? https://clang.llvm.org/extra/clang-tidy/checks/readability/identifier-naming.html

[chengcli]

Yes, I think this can work. When you have a script to check, I'll give you an example of running it during pre-commit.