Function hasDefaultExport

packages/compiler-sfc/src/rewriteDefault.ts:92–106

(ast: Statement[])

}

export function hasDefaultExport(ast: Statement[]): boolean {
  for (const stmt of ast) {
    if (stmt.type === 'ExportDefaultDeclaration') {
      return true
    } else if (
      stmt.type === 'ExportNamedDeclaration' &&
      stmt.specifiers.some(
        spec => (spec.exported as Identifier).name === 'default',
      )
    ) {
      return true
    }
  }
  return false
}

function specifierEnd(s: MagicString, end: number, nodeEnd: number | null) {
  // export { default   , foo } ...