CPP.md

File Metrics for C++

This document provides language-specific details about the file metrics for the C++ programming language.

complexity

The "complexity" metric counts:

• if and else if statements
• Uses of the conditional operator condition ? then : otherwise
• Loops, including
  • for loops
  • while loops
  • do-while loops
  • range-based for loops, like for ( optional-init-statement; int& i : some_vector )
• Logical binary operators && and ||, as well as their alternative representations and and or
• case labels in switch-statements
• catch blocks
• Structured Exception Handling (SEH) __except clauses
• Function declarations, exactly like they are considered for the "functions" metric

It does not count:

• Any function calls, including calls of standard library functions for a more functional programming style, like std::for_each
• Any preprocessor directives, including #if, #ifdef and #elif
• Bitwise binary operators, like ^ (xor), & (bitand), | (bitor), &= (and_eq) or |= (or_eq)

functions

The "functions" metric counts function declarations in both header and source files. This also includes the definition of functions in source or header files that were already declared before. The metric is tested to account for:

• general functions
• member functions, including constructors, destructors, (pure) virtual functions, default functions and deleted functions
• lambda expressions

classes

The "classes" metric counts:

• class declarations
• struct declarations
• union declarations
• enum declarations (including scoped enums, unscoped enums and opaque enums)

It also considers declarations that are inside a typedef, like typedef struct { int a; } alias_name;

It does not count:

• forward declarations of classes, structs and unions (with semicolon directly after the class/struct/enum name instead of a code block, like class name;).
• General type definitions via typedef

lines_of_code, comment_lines, real_lines_of_code and keywords_in_comments

There are no language-specific details for these metrics. See README.md for their general definition.