Swift - Differens

Swift extractor

The Swift extractor maps tree-sitter Swift CST nodes to canonical concepts. Class, protocol, and function names come from the standard name field; property names come from the binding pattern.

Detected concepts

tree-sitter node type	Canonical concept
`class_declaration`	Class
`protocol_declaration`	Interface
`function_declaration`	Function
`property_declaration`	Variable
`import_declaration`	Import
`typealias_declaration`	TypeDef
`enum_entry`	Enum
`call_expression`	CallExpression
`assignment`	Assignment
`lambda_literal`	Closure
`line_string_literal`	string_literal
`integer_literal`	integer_literal

Example

Renaming a function:

// old.swift
class Counter { func total(n: Int) -> Int { return n + 1 } }

// new.swift
class Counter { func sum(n: Int) -> Int { return n + 1 } }

Running differens old.swift new.swift:

~ renamed function `total` to `sum` in class `Counter`

Known limitations

Property observers (didSet, willSet) are bodies; their edits report as body changes on the property.
Computed property getters and setters are not labeled as accessor kinds; they diff as blocks inside the property.