Swift DocC Inline Comments

Overview

Swift DocC inline comments follow a specific structure. Section headers like ## Overview and ## Topics belong in .docc catalog files, NOT in inline source comments.

Structure

/// Summary (first paragraph - one sentence)
///
/// Discussion paragraphs (no header needed)
///
/// ```swift
/// // Code example
/// ```
///
/// - Parameter name: Description
/// - Returns: Description
/// - Throws: Description
/// - Note: Additional info

Quick Reference

Element	Format	Location
Summary	First paragraph	Inline
Discussion	Subsequent paragraphs	Inline
Code examples	Triple backticks	Inline, before parameters
## Overview	Section header	.docc catalog ONLY
## Topics	Section header	.docc catalog ONLY
Symbol links	``SymbolName``	Both

Correct Format

/// Brief summary in one sentence.
///
/// Extended discussion explaining behavior, use cases,
/// or important details. No header needed.
///
/// ```swift
/// let example = MyType()
/// example.doSomething()
/// ```
///
/// - Parameter value: What this parameter does.
/// - Returns: What gets returned.
/// - Note: Default value is `.default`.
func method(value: Int) -> String

Common Mistakes

Wrong	Correct
/// ## Overview	Just write paragraphs
/// ## Topics	Use .docc catalog file
/// ## Example	Just use code block
Parameters before code	Code block, then parameters

Red Flags

These indicate wrong format:

• ## Overview in /// comments
• ## Topics in /// comments
• ## Example before code blocks
• - Parameter: appearing before code examples

Generate Documentation

swift package generate-documentation