eewing
52 lines
1.4 KiB
JavaScript
52 lines
1.4 KiB
JavaScript
/** @import { Node } from 'estree' */
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/**
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* @param {Node} node
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* @param {Node} parent
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* @returns {boolean}
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*/
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export default function is_reference(node, parent) {
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if (node.type === 'MemberExpression') {
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return !node.computed && is_reference(node.object, node);
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}
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if (node.type !== 'Identifier') return false;
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switch (parent?.type) {
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// disregard `bar` in `foo.bar`
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case 'MemberExpression':
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return parent.computed || node === parent.object;
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// disregard the `foo` in `class {foo(){}}` but keep it in `class {[foo](){}}`
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case 'MethodDefinition':
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return parent.computed;
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// disregard the `meta` in `import.meta`
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case 'MetaProperty':
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return parent.meta === node;
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// disregard the `foo` in `class {foo=bar}` but keep it in `class {[foo]=bar}` and `class {bar=foo}`
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case 'PropertyDefinition':
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return parent.computed || node === parent.value;
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// disregard the `bar` in `{ bar: foo }`, but keep it in `{ [bar]: foo }`
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case 'Property':
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return parent.computed || node === parent.value;
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// disregard the `bar` in `export { foo as bar }` or
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// the foo in `import { foo as bar }`
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case 'ExportSpecifier':
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case 'ImportSpecifier':
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return node === parent.local;
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// disregard the `foo` in `foo: while (...) { ... break foo; ... continue foo;}`
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case 'LabeledStatement':
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case 'BreakStatement':
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case 'ContinueStatement':
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return false;
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default:
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return true;
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}
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}
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