(is)

kind constraints for functions and variable declarations

(is kind)

Where:

1. kind: kind to match *

Matching:

1. async functions, e.g. async function x() {}
2. generator functions, e.g. function* x() {}
3. const declarations, e.g. const x = 1
4. let declarations, e.g. let x = 1
5. var declarations, e.g. var x = 1

Examples

Audit async functions before changing error handling.

(fun _ _ (is async))

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

async function load() {}
const run = async () => {}
function sync() {}

---

Find generator utilities to replace with async iterators.

(fun _ _ (is generator))

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

function* ids() { yield 1 }
const gen = function* () { yield 2 }
function ids() { return [1] }

---

Locate const declarations that should be migrated to let.

(var _ _ (is const))

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

const token = "abc"
let retries = 3
var legacy = 1

---

Arguments

kind

• "async"
• "generator"
• "var"
• "let"
• "const"

Does NOT support: Composition — Free-form Selection — Refinement — Replacement