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1 files changed, 40 insertions, 0 deletions

diff --git a/node_modules/sucrase/dist/esm/util/getDeclarationInfo.js b/node_modules/sucrase/dist/esm/util/getDeclarationInfo.js
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+++ b/node_modules/sucrase/dist/esm/util/getDeclarationInfo.js
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+import {isTopLevelDeclaration} from "../parser/tokenizer";
+import {TokenType as tt} from "../parser/tokenizer/types";
+
+
+
+
+
+
+
+export const EMPTY_DECLARATION_INFO = {
+  typeDeclarations: new Set(),
+  valueDeclarations: new Set(),
+};
+
+/**
+ * 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.
+ */
+export default 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 === tt.name && isTopLevelDeclaration(token)) {
+      if (token.isType) {
+        typeDeclarations.add(tokens.identifierNameForToken(token));
+      } else {
+        valueDeclarations.add(tokens.identifierNameForToken(token));
+      }
+    }
+  }
+  return {typeDeclarations, valueDeclarations};
+}