--- title: Chromium’s span-over-initializer-list success story description: A close reading of a Chromium commit by Peter Kasting that added a converting constructor from initializer_list to base::span, mirroring the C++26 P2447... canonical: https://daily.dev/posts/chromium-s-span-over-initializer-list-success-story-zkzr1vben twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Chromium’s span-over-initializer-list success story | daily.dev og:description: A close reading of a Chromium commit by Peter Kasting that added a converting constructor from initializer_list to base::span, mirroring the C++26 P2447... og:url: https://daily.dev/posts/chromium-s-span-over-initializer-list-success-story-zkzr1vben og:image: https://api.daily.dev/og/posts/ZKzR1vBEn.png og:image:alt: Chromium’s span-over-initializer-list success story og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Chromium’s span-over-initializer-list success story **[Arthur O'Dwyer](https://daily.dev/sources/quuxplusone)** · 3 min read · 0 upvotes · 0 comments ## Summary A close reading of a Chromium commit by Peter Kasting that added a converting constructor from initializer_list to base::span, mirroring the C++26 P2447 proposal. The post walks through real call sites in the codebase that were simplified by the new constructor, showing how three different workarounds (temporary std::array, doubled curly braces, explicit span cast) all converged on cleaner natural syntax. Two 'failure cases' are also examined where the change couldn't fully simplify code due to the lack of CTAD and C++ grammar restrictions on braced initializer lists after operators. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [C\+\+26: Span improvements](https://daily.dev/posts/c-26-span-improvements-81hatqzbi) · Sandor Dargo · 0 upvotes · 0 comments - [C\+\+26: Standard library hardening](https://daily.dev/posts/c-26-standard-library-hardening-eykurnwet) · Sandor Dargo · 23 upvotes · 1 comments - [C Constructs That Still Don’t Work in C\+\+ — and a Few That Changed](https://daily.dev/posts/c-constructs-that-still-don-t-work-in-c-and-a-few-that-changed-0okhcujer) · Hacker News · 1 upvotes · 0 comments - [Modern C\+\+ use in Chromium](https://daily.dev/posts/modern-c-use-in-chromium-n7nlqufi1) · Hacker News · 3 upvotes · 0 comments --- Tags: [#c++](https://daily.dev/tags/c++), [#chromium](https://daily.dev/tags/chromium) [View this post on daily.dev](https://daily.dev/posts/chromium-s-span-over-initializer-list-success-story-zkzr1vben) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Chromium’s span-over-initializer-list success story","url":"https://daily.dev/posts/chromium-s-span-over-initializer-list-success-story-zkzr1vben","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/chromium-s-span-over-initializer-list-success-story-zkzr1vben"},"datePublished":"2026-03-19T19:11:59.715Z","dateModified":"2026-03-19T19:12:26.654Z","description":"A close reading of a Chromium commit by Peter Kasting that added a converting constructor from initializer_list to base::span, mirroring the C++26 P2447...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/e3a9783d2dc46301158849c96a3b989b?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/e3a9783d2dc46301158849c96a3b989b?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Arthur O'Dwyer","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Arthur O'Dwyer","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/a789aa2fcdb64c219980d6d6901791e9","url":"https://daily.dev/sources/quuxplusone"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/chromium-s-span-over-initializer-list-success-story-zkzr1vben","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"c++,chromium","timeRequired":"PT3M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Arthur O'Dwyer","item":"https://daily.dev/sources/quuxplusone"},{"@type":"ListItem","position":3,"name":"Chromium’s span-over-initializer-list success story"}]} ```