cpp-naming-check

name	cpp-naming-check
description	Check C++ naming conventions against Google Style Guide. Use when checking if names follow conventions or when renaming identifiers.

C++ Naming Convention Checker

Verify names follow Google C++ Style Guide conventions.

Naming Rules Quick Check

Entity	Convention	Pattern	Examples
Files	lowercase + _ or -	snake_case.cc	my_class.cc, http-parser.h
Classes	PascalCase	[A-Z][a-zA-Z0-9]*	MyClass, UrlParser
Structs	PascalCase	[A-Z][a-zA-Z0-9]*	Point, HttpRequest
Type aliases	PascalCase	[A-Z][a-zA-Z0-9]*	DataMap, StringList
Enums	PascalCase	[A-Z][a-zA-Z0-9]*	ErrorCode, State
Enumerators	kPascalCase	k[A-Z][a-zA-Z0-9]*	kOk, kNotFound
Functions	PascalCase	[A-Z][a-zA-Z0-9]*	ProcessData(), GetValue()
Accessors	snake_case	[a-z][a-z0-9_]*	count(), set_count()
Variables	snake_case	[a-z][a-z0-9_]*	table_name, num_items
Class members	snake_case_	[a-z][a-z0-9_]*_	value_, data_map_
Struct members	snake_case	[a-z][a-z0-9_]*	width, height
Constants	kPascalCase	k[A-Z][a-zA-Z0-9]*	kMaxSize, kPi
Macros	UPPER_CASE	[A-Z][A-Z0-9_]*	MY_MACRO, DEBUG_LOG
Namespaces	snake_case	[a-z][a-z0-9_]*	my_project, internal
Template params	Varies	Type=T, value=n	T, InputIterator, N

Common Mistakes

❌ Wrong → ✅ Correct

// Classes
class myClass;        → class MyClass;
class HTTPParser;     → class HttpParser;  // Treat acronyms as words

// Variables
int TableName;        → int table_name;
int tablename;        → int table_name;    // Use underscores

// Class members
int value;            → int value_;        // Trailing underscore
int m_value;          → int value_;        // No Hungarian notation

// Functions
void process_data();  → void ProcessData();
void getValue();      → void GetValue();   // Or get_value() if accessor

// Constants
const int MAX_SIZE;   → const int kMaxSize;
const int maxSize;    → const int kMaxSize;

// Enumerators
enum { ERROR_OK };    → enum { kErrorOk };
enum { Ok };          → enum { kOk };

// Macros (must be UPPER_CASE with prefix)
#define DEBUG         → #define MYPROJECT_DEBUG

Abbreviations

• OK: Listed in Wikipedia or universally known (i, n, id, url)
• Capitalize as word: StartRpc() not StartRPC()
• Don't delete letters: customer not cstmr

Check Process

1. Identify the entity type (class, function, variable, etc.)
2. Apply the corresponding naming rule
3. Check for consistency with surrounding code
4. Flag any Hungarian notation or other outdated styles