{"id":48818,"date":"2025-08-07T17:58:57","date_gmt":"2025-08-07T21:58:57","guid":{"rendered":"https:\/\/mjtsai.com\/blog\/?p=48818"},"modified":"2025-08-07T17:58:57","modified_gmt":"2025-08-07T21:58:57","slug":"sendable-unchecked-sendable-sendable-sending-and-nonsending","status":"publish","type":"post","link":"https:\/\/mjtsai.com\/blog\/2025\/08\/07\/sendable-unchecked-sendable-sendable-sending-and-nonsending\/","title":{"rendered":"Sendable, @unchecked Sendable, @Sendable, sending, and nonsending"},"content":{"rendered":"<p><a href=\"https:\/\/fatbobman.com\/en\/posts\/sendable-sending-nonsending\/\">Fatbobman<\/a>:<\/p>\n<blockquote cite=\"https:\/\/fatbobman.com\/en\/posts\/sendable-sending-nonsending\/\">\n<p>Swift&rsquo;s concurrency model introduces numerous keywords, some of which are similar in naming and purpose, often causing confusion among developers. This article examines several keywords related to cross-isolation domain passing in Swift concurrency: <code>Sendable<\/code>, <code>@unchecked Sendable<\/code>, <code>@Sendable<\/code>, <code>sending<\/code>, and <code>nonsending<\/code>, helping you understand their respective roles and use cases.<\/p>\n<\/blockquote>\n\n<p>There&rsquo;s a great <a href=\"https:\/\/fatbobman.com\/en\/posts\/sendable-sending-nonsending\/#summary\">summary table<\/a>.<\/p>\n\n<p>Previously:<\/p>\n<ul>\n<li><a href=\"https:\/\/mjtsai.com\/blog\/2025\/08\/06\/xcode-26-beta-5\/\">Xcode 26 Beta 5<\/a><\/li>\n<li><a href=\"https:\/\/mjtsai.com\/blog\/2025\/03\/03\/swift-6-1\/\">Swift 6.1<\/a><\/li>\n<li><a href=\"https:\/\/mjtsai.com\/blog\/2025\/02\/04\/swift-concurrency-glossary\/\">Swift Concurrency Glossary<\/a><\/li>\n<li><a href=\"https:\/\/mjtsai.com\/blog\/2024\/11\/25\/swift-vision-improving-the-approachability-of-data-race-safety\/\">Swift Vision: Improving the Approachability of Data-Race Safety<\/a><\/li>\n<li><a href=\"https:\/\/mjtsai.com\/blog\/2024\/11\/18\/swift-concurrency-proposal-index\/\">Swift Concurrency Proposal Index<\/a><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Fatbobman: Swift&rsquo;s concurrency model introduces numerous keywords, some of which are similar in naming and purpose, often causing confusion among developers. This article examines several keywords related to cross-isolation domain passing in Swift concurrency: Sendable, @unchecked Sendable, @Sendable, sending, and nonsending, helping you understand their respective roles and use cases. There&rsquo;s a great summary table. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"apple_news_api_created_at":"2025-08-07T21:58:59Z","apple_news_api_id":"7c12bac8-5f54-49d4-900b-cfaf02fcf499","apple_news_api_modified_at":"2025-08-07T21:58:59Z","apple_news_api_revision":"AAAAAAAAAAD\/\/\/\/\/\/\/\/\/\/w==","apple_news_api_share_url":"https:\/\/apple.news\/AfBK6yF9USdSQC8-vAvz0mQ","apple_news_coverimage":0,"apple_news_coverimage_caption":"","apple_news_is_hidden":false,"apple_news_is_paid":false,"apple_news_is_preview":false,"apple_news_is_sponsored":false,"apple_news_maturity_rating":"","apple_news_metadata":"\"\"","apple_news_pullquote":"","apple_news_pullquote_position":"","apple_news_slug":"","apple_news_sections":"\"\"","apple_news_suppress_video_url":false,"apple_news_use_image_component":false,"footnotes":""},"categories":[4],"tags":[46,71,2200,901],"class_list":["post-48818","post","type-post","status-publish","format-standard","hentry","category-programming-category","tag-languagedesign","tag-programming","tag-swift-concurrency","tag-swift-programming-language"],"apple_news_notices":[],"_links":{"self":[{"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/posts\/48818","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/comments?post=48818"}],"version-history":[{"count":1,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/posts\/48818\/revisions"}],"predecessor-version":[{"id":48819,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/posts\/48818\/revisions\/48819"}],"wp:attachment":[{"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/media?parent=48818"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/categories?post=48818"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/tags?post=48818"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}