1 | import {TokenType as tt} from "../parser/tokenizer/types";
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2 |
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3 |
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4 |
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6 |
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7 |
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8 | export default function shouldElideDefaultExport(
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9 | isTypeScriptTransformEnabled,
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10 | tokens,
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11 | declarationInfo,
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12 | ) {
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13 | if (!isTypeScriptTransformEnabled) {
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14 | return false;
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15 | }
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16 | const exportToken = tokens.currentToken();
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17 | if (exportToken.rhsEndIndex == null) {
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18 | throw new Error("Expected non-null rhsEndIndex on export token.");
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19 | }
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20 |
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21 | const numTokens = exportToken.rhsEndIndex - tokens.currentIndex();
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22 | if (
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23 | numTokens !== 3 &&
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24 | !(numTokens === 4 && tokens.matches1AtIndex(exportToken.rhsEndIndex - 1, tt.semi))
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25 | ) {
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26 | return false;
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27 | }
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28 | const identifierToken = tokens.tokenAtRelativeIndex(2);
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29 | if (identifierToken.type !== tt.name) {
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30 | return false;
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31 | }
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32 | const exportedName = tokens.identifierNameForToken(identifierToken);
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33 | return (
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34 | declarationInfo.typeDeclarations.has(exportedName) &&
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35 | !declarationInfo.valueDeclarations.has(exportedName)
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36 | );
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37 | }
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