36 lines
1.1 KiB
JavaScript
36 lines
1.1 KiB
JavaScript
import { invariant } from './utils';
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/**
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* https://tc39.es/ecma402/#sec-partitionpattern
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* @param pattern
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*/
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export function PartitionPattern(pattern) {
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var result = [];
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var beginIndex = pattern.indexOf('{');
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var endIndex = 0;
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var nextIndex = 0;
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var length = pattern.length;
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while (beginIndex < pattern.length && beginIndex > -1) {
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endIndex = pattern.indexOf('}', beginIndex);
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invariant(endIndex > beginIndex, "Invalid pattern ".concat(pattern));
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if (beginIndex > nextIndex) {
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result.push({
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type: 'literal',
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value: pattern.substring(nextIndex, beginIndex),
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});
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}
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result.push({
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type: pattern.substring(beginIndex + 1, endIndex),
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value: undefined,
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});
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nextIndex = endIndex + 1;
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beginIndex = pattern.indexOf('{', nextIndex);
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}
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if (nextIndex < length) {
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result.push({
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type: 'literal',
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value: pattern.substring(nextIndex, length),
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});
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}
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return result;
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}
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