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- function isReference(node, parent) {
- if (node.type === 'MemberExpression') {
- return !node.computed && isReference(node.object, node);
- }
- if (node.type === 'Identifier') {
- if (!parent)
- return true;
- 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 `foo` in `class {foo=bar}` but keep it in `class {[foo]=bar}` and `class {bar=foo}`
- case 'FieldDefinition': 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;
- }
- }
- return false;
- }
- export default isReference;
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