CPP Style Guide

Naming

• Camelcased - Name starts with a capital letter, with each word starting with a capital letter and no underscores.

• camelCased – Starting with a small letter but all other words starts with a capital letter

• under_scored - all letters in capital separated by underscores.

• ALL_CAPITALS – all letters in capital separated by underscores.

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Use Of Naming Types

1. UnderScore

• Packages , topics and services, message fields
  for e.g. mission_planner , buoy_detection
• File names (be descriptive)
  for e.g. action_server.h
• Libraries (don’t insert underscore just after lib prefix)
  for e.g. libmy_great_thing
• Arguments of functions
  for e.g. example_arg
• Variable names
  for e.g. var_name
• Class data members with a trailing underscore added
  for e.g. final_image_
• Global variables with leading g_ added
  for e.g. g_min , g_max
• Namespace names
  

2. CamelCased

• Class names and other typenames like struct, typedef, enums
  for e.g. ExampleClass
• Message file name
  for e.g. DetectGate

3. camelCased

• Function and class method names
  for e.g. exampleMethod

4. ALL_CAPITALS

• constants
  for e.g. MIN , MAX

ROS Convention
CppStyleGuide