fix(extractor): keep the heritage clause of an anonymous default class

packages/dtsx/src/extractor/scanner.tsmodified+10-1

Changes to packages/dtsx/src/extractor/scanner.ts

		⋯2,606 linesShow the 2,606 lines above this hunk@@ -2607,7 +2607,16 @@ function scanDeclarationsInternal(_source: string, _filename: string, _keepComme
2607	2607	pos += 5 // skip 'class'
2608	2608	skipWhitespaceAndComments()
2609	2609
2610		- const name = readIdent() || 'AnonymousClass'
	2610	+ // `export default class extends Base {}` has no name: `extends`, or
	2611	+ // `implements` before a type, begins its heritage clause, as TypeScript
	2612	+ // reads it. Such a class gets a helper name the file does not use, as a
	2613	+ // default-exported expression does.
	2614	+ const isAnonymous = isDefault && (matchWord('extends') || (matchWord('implements') && isIdentStart(peekAfterWord('implements'))))
	2615	+ let name = isAnonymous ? '' : (readIdent() || 'AnonymousClass')
	2616	+ if (!name) {
	2617	+ name = '__dtsx_default_class__'
	2618	+ for (let suffix = 1; source.includes(name); suffix++) name = `__dtsx_default_class_${suffix}__`
	2619	+ }
2611	2620	skipWhitespaceAndComments()
2612	2621
2613	2622	const generics = extractGenerics()