| 1 | const dayOfYearTokenRE = /^D+$/;
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| 2 | const weekYearTokenRE = /^Y+$/;
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| 3 |
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| 4 | const throwTokens = ["D", "DD", "YY", "YYYY"];
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| 5 |
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| 6 | export function isProtectedDayOfYearToken(token) {
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| 7 | return dayOfYearTokenRE.test(token);
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| 8 | }
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| 9 |
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| 10 | export function isProtectedWeekYearToken(token) {
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| 11 | return weekYearTokenRE.test(token);
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| 12 | }
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| 13 |
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| 14 | export function warnOrThrowProtectedError(token, format, input) {
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| 15 | const _message = message(token, format, input);
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| 16 | console.warn(_message);
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| 17 | if (throwTokens.includes(token)) throw new RangeError(_message);
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| 18 | }
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| 19 |
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| 20 | function message(token, format, input) {
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| 21 | const subject = token[0] === "Y" ? "years" : "days of the month";
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| 22 | return `Use \`${token.toLowerCase()}\` instead of \`${token}\` (in \`${format}\`) for formatting ${subject} to the input \`${input}\`; see: https://github.com/date-fns/date-fns/blob/master/docs/unicodeTokens.md`;
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| 23 | }
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