fediversity.eu/node_modules/sucrase/dist/util/getDeclarationInfo.js
2024-03-26 16:28:28 +01:00

41 lines
1.5 KiB
JavaScript

"use strict";Object.defineProperty(exports, "__esModule", {value: true});var _tokenizer = require('../parser/tokenizer');
var _types = require('../parser/tokenizer/types');
const EMPTY_DECLARATION_INFO = {
typeDeclarations: new Set(),
valueDeclarations: new Set(),
}; exports.EMPTY_DECLARATION_INFO = EMPTY_DECLARATION_INFO;
/**
* Get all top-level identifiers that should be preserved when exported in TypeScript.
*
* Examples:
* - If an identifier is declared as `const x`, then `export {x}` should be preserved.
* - If it's declared as `type x`, then `export {x}` should be removed.
* - If it's declared as both `const x` and `type x`, then the export should be preserved.
* - Classes and enums should be preserved (even though they also introduce types).
* - Imported identifiers should be preserved since we don't have enough information to
* rule them out. --isolatedModules disallows re-exports, which catches errors here.
*/
function getDeclarationInfo(tokens) {
const typeDeclarations = new Set();
const valueDeclarations = new Set();
for (let i = 0; i < tokens.tokens.length; i++) {
const token = tokens.tokens[i];
if (token.type === _types.TokenType.name && _tokenizer.isTopLevelDeclaration.call(void 0, token)) {
if (token.isType) {
typeDeclarations.add(tokens.identifierNameForToken(token));
} else {
valueDeclarations.add(tokens.identifierNameForToken(token));
}
}
}
return {typeDeclarations, valueDeclarations};
} exports.default = getDeclarationInfo;