27 lines
733 B
Plaintext
27 lines
733 B
Plaintext
export function visit(node, keys, visitorSpec) {
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if (!node || !keys) {
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return;
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}
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const type = node.type;
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const visitor = visitorSpec[type];
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if (typeof visitor === 'function') {
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visitor(node);
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}
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const childFields = keys[type];
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if (!childFields) {
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return;
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}
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for (const fieldName of childFields) {
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for (const item of [node[fieldName]].flat()) {
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if (!item || typeof item !== 'object' || !('type' in item)) {
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continue;
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}
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visit(item, keys, visitorSpec);
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}
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}
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const exit = visitorSpec[`${type}:Exit`];
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if (typeof exit === 'function') {
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exit(node);
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}
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}
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//# sourceMappingURL=visit.js.map |