File Metrics for Go

This document outlines the definition of file metrics for Go.

complexity

The "complexity" metric counts:

if and else if statements
for loops with following syntaxes:
- for <initStatement>; <condition>; <postStatement> {...}
- for <condition> {...}
- for <expressionList> = range <expression> {...}
- for <identifierList> := range <expression> {...}
case labels in switch-statements and select-statements
logical binary operations && and ||
everything counted for the "functions" metric

functions

The "functions" metric counts:

function and method declarations in struct and interface with and without the keyword func
general functions and function literals

classes

The "classes" metric counts:

struct and interface declarations (named and anonymous)

lines_of_code, comment_lines, real_lines_of_code and keywords_in_comments