File size: 1,423 Bytes
04ec17f | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 | /** @import { Node } from 'estree' */
/**
* @param {Node} node
* @param {Node} parent
* @returns {boolean}
*/
export default function is_reference(node, parent) {
if (node.type === 'MemberExpression') {
return !node.computed && is_reference(node.object, node);
}
if (node.type !== 'Identifier') return false;
switch (parent?.type) {
// disregard `bar` in `foo.bar`
case 'MemberExpression':
return parent.computed || node === parent.object;
// disregard the `foo` in `class {foo(){}}` but keep it in `class {[foo](){}}`
case 'MethodDefinition':
return parent.computed;
// disregard the `meta` in `import.meta`
case 'MetaProperty':
return parent.meta === node;
// disregard the `foo` in `class {foo=bar}` but keep it in `class {[foo]=bar}` and `class {bar=foo}`
case 'PropertyDefinition':
return parent.computed || node === parent.value;
// disregard the `bar` in `{ bar: foo }`, but keep it in `{ [bar]: foo }`
case 'Property':
return parent.computed || node === parent.value;
// disregard the `bar` in `export { foo as bar }` or
// the foo in `import { foo as bar }`
case 'ExportSpecifier':
case 'ImportSpecifier':
return node === parent.local;
// disregard the `foo` in `foo: while (...) { ... break foo; ... continue foo;}`
case 'LabeledStatement':
case 'BreakStatement':
case 'ContinueStatement':
return false;
default:
return true;
}
}
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