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()notStartRPC() - Don't delete letters:
customernotcstmr
Check Process
- Identify the entity type (class, function, variable, etc.)
- Apply the corresponding naming rule
- Check for consistency with surrounding code
- Flag any Hungarian notation or other outdated styles
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