(var)

variable declarations (var/let/const), including destructuring patterns

(var name? init? kind?)

Where:

1. name: binding name or pattern *
2. init: initializer expression *
3. kind: the declaration keyword (var, let, or const) *

Matching:

1. var declarations, e.g. var x = 1
2. let declarations, e.g. let x = 1
3. const declarations, e.g. const x = 1
4. object destructuring, e.g. const { a } = obj
5. array destructuring, e.g. const [a] = list

Behavior

• When a declaration has multiple declarators, the statement matches if any declarator satisfies the constraints.

Examples

Find lingering var declarations before enforcing no-var.

(var _ _ (is var))

Selects in lines { 1 } but not in { 2, 3 }:

var legacy = 1
let modern = 2
const stable = 3

---

Locate environment destructuring for migration to a config loader.

(var (obj) (mem env process) (is const))

Selects in lines { 1 } but not in { 2, 3 }:

const { API_URL } = process.env
const { API_URL } = config
let { API_URL } = process.env

---

Identify array initializations to migrate to typed arrays.

(var _ (arr))

Selects in lines { 1, 2 } but not in { 3 }:

const items = []
let ids = [1, 2]
const count = 1

---

Arguments

name

• Identifier: shorthand for (id)
• Pattern: shorthand for (id)
• (:kind) • (:ref) • (:text) • (arr) • (attr) • (bool) • (call) • (child) • (comp) • (export) • (fun) • (id) • (id+) • (import) • (jsx) • (mem) • (null) • (num) • (obj) • (of) • (prop) • (regex) • (regex+) • (str) • (str*) • (str+) • (tpl) • (tpl*) • (var) • (:into) • (:and) • (:or) • (:not) • (:replace) • (:capture)

init

• Identifier: shorthand for (id)
• Pattern: shorthand for (id)
• (arr) • (bin) • (bool) • (call) • (comp) • (fun) • (id) • (id+) • (jsx) • (mem) • (null) • (num) • (obj) • (of) • (regex) • (regex+) • (str) • (str*) • (str+) • (tpl) • (tpl*) • (:ref) • (:into) • (:and) • (:or) • (:not) • (:text) • (:kind) • (:replace) • (:capture)

kind

• (is)
• (:and) • (:not) • (:or) • (:kind)

Does NOT support: Refinement — Replacement