CINXE.COM

<!DOCTYPE html> <html lang="en-us"><head><script src="https://www.googletagmanager.com/gtm.js?id=GTM-MX6DBN9" async="async"></script><script src="/static/hash-o6oemknr/js/gtm.js" async="async"></script><meta charset="utf-8"/><meta http-equiv="x-ua-compatible" content="ie=edge"/><meta name="viewport" content="width=device-width, initial-scale=1"/><meta name="twitter:card" content="summary"/><meta name="twitter:site" content="@dart_lang"/><meta name="twitter:description" content="Annotations used to express developer intentions that can't otherwise be deduced by statically analyzing source code."/><meta name="twitter:image" content="https://pub.dev/static/hash-o6oemknr/img/pub-dev-icon-cover-image.png"/><meta property="og:type" content="website"/><meta property="og:site_name" content="Dart packages"/><meta property="og:title" content="meta 1.15.0 | Dart package"/><meta property="og:description" content="Annotations used to express developer intentions that can't otherwise be deduced by statically analyzing source code."/><meta property="og:image" content="https://pub.dev/static/hash-o6oemknr/img/pub-dev-icon-cover-image.png"/><meta property="og:url" content="https://pub.dev/packages/meta/versions/1.15.0"/><title>meta 1.15.0 | Dart package</title><link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Google+Sans:wght@400;500;700&family=Google+Sans+Display:wght@400&family=Google+Sans+Text:wght@400;500;700&family=Google+Sans+Mono:wght@400;700&display=swap"/><link rel="shortcut icon" href="/favicon.ico?hash=nk4nss8c7444fg0chird9erqef2vkhb8"/><link rel="stylesheet" href="https://www.gstatic.com/glue/v25_0/ccb.min.css"/><link rel="search" type="application/opensearchdescription+xml" title="Dart packages" href="/osd.xml"/><link rel="canonical" href="https://pub.dev/packages/meta/versions/1.15.0"/><meta name="description" content="Annotations used to express developer intentions that can't otherwise be deduced by statically analyzing source code."/><link rel="alternate" type="application/atom+xml" title="Updated Packages Feed for Pub" href="/feed.atom"/><link rel="stylesheet" type="text/css" href="/static/hash-o6oemknr/material/bundle/styles.css"/><link rel="stylesheet" type="text/css" href="/static/hash-o6oemknr/css/style.css"/><script src="/static/hash-o6oemknr/material/bundle/script.min.js" defer="defer"></script><script src="/static/hash-o6oemknr/js/script.dart.js" defer="defer"></script><script src="https://www.gstatic.com/brandstudio/kato/cookie_choice_component/cookie_consent_bar.v3.js" defer="defer" data-autoload-cookie-consent-bar="true"></script><meta name="pub-page-data" content="eyJwa2dEYXRhIjp7InBhY2thZ2UiOiJtZXRhIiwidmVyc2lvbiI6IjEuMTUuMCIsImxpa2VzIjo0MzEsInB1Ymxpc2hlcklkIjoiZGFydC5kZXYiLCJpc0Rpc2NvbnRpbnVlZCI6ZmFsc2UsImlzTGF0ZXN0IjpmYWxzZX0sInNlc3Npb25Bd2FyZSI6ZmFsc2V9"/><link rel="preload" href="/static/hash-o6oemknr/highlight/highlight-with-init.js" as="script"/></head><body class="light-theme"><script src="/static/hash-o6oemknr/js/dark-init.js"></script><noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-MX6DBN9" height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript><div class="site-header"><button class="hamburger" aria-label="menu toggle"></button><a class="logo" href="/"><img class="site-logo" src="/static/hash-o6oemknr/img/pub-dev-logo.svg" alt="" width="140" height="30" role="presentation"/></a><div class="site-header-space"></div><div class="site-header-mask"></div><div class="site-header-search"><form action="/packages" method="GET"><input class="site-header-search-input" name="q" placeholder="New search..." autocomplete="on" title="Search"/></form></div><nav class="site-header-nav scroll-container"><div class="nav-login-container"><button id="-account-login" class="nav-main-button link">Sign in</button></div><div class="nav-container nav-help-container hoverable"><button class="nav-main-button">Help</button><div class="nav-hover-popup"><div class="nav-table-columns"><div class="nav-table-column"><h3>Pub.dev</h3><a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a><a class="nav-link" href="/help/scoring" rel="noopener" target="_blank">Package scoring and pub points</a></div><div class="nav-table-column"><h3>Flutter</h3><a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a><a class="nav-link" href="https://flutter.dev/developing-packages/" rel="noopener" target="_blank">Developing packages and plugins</a><a class="nav-link" href="https://dart.dev/tools/pub/publishing" rel="noopener" target="_blank">Publishing a package</a></div><div class="nav-table-column"><h3>Dart</h3><a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a><a class="nav-link" href="https://dart.dev/tools/pub/publishing" rel="noopener" target="_blank">Publishing a package</a></div></div></div></div><div class="nav-container nav-help-container-mobile foldable"><h3 class="foldable-button">Pub.dev <img class="foldable-icon" src="/static/hash-o6oemknr/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/></h3><div class="foldable-content"><a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a><a class="nav-link" href="/help/scoring" rel="noopener" target="_blank">Package scoring and pub points</a></div></div><div class="nav-container nav-help-container-mobile foldable"><h3 class="foldable-button">Flutter <img class="foldable-icon" src="/static/hash-o6oemknr/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/></h3><div class="foldable-content"><a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a><a class="nav-link" href="https://flutter.dev/developing-packages/" rel="noopener" target="_blank">Developing packages and plugins</a><a class="nav-link" href="https://dart.dev/tools/pub/publishing" rel="noopener" target="_blank">Publishing a package</a></div></div><div class="nav-container nav-help-container-mobile foldable"><h3 class="foldable-button">Dart <img class="foldable-icon" src="/static/hash-o6oemknr/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/></h3><div class="foldable-content"><a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a><a class="nav-link" href="https://dart.dev/tools/pub/publishing" rel="noopener" target="_blank">Publishing a package</a></div></div></nav></div><div id="banner-container"></div><main class="container"><div class="detail-wrapper -active -has-info-box"><div class="detail-header -is-loose"><div class="detail-container"><div class="detail-header-outer-block"><div class="detail-header-content-block"><h1 class="title">meta 1.15.0 <span class="pkg-page-title-copy"><img class="pkg-page-title-copy-icon filter-invert-on-dark" src="/static/hash-o6oemknr/img/content-copy-icon.svg" alt="copy "meta: ^1.15.0" to clipboard" width="18" height="18" title="Copy "meta: ^1.15.0" to clipboard" data-copy-content="meta: ^1.15.0" data-ga-click-event="copy-package-version"/><div class="pkg-page-title-copy-feedback"><span class="code">meta: ^1.15.0</span> copied to clipboard</div></span></h1><div class="metadata">Published <span><a class="-x-ago" href="" title="May 7, 2024" aria-label="6 months ago" aria-role="button" role="button" data-timestamp="1715097538517">6 months ago</a></span> • <a class="-pub-publisher" href="/publishers/dart.dev"><img class="-pub-publisher-shield filter-invert-on-dark" src="/static/hash-o6oemknr/img/material-icon-verified.svg" alt="verified publisher" width="14" height="14" title="Published by a pub.dev verified publisher"/>dart.dev</a><span class="package-badge" title="Package is compatible with Dart 3.">Dart 3 compatible</span>• Latest: <span><a href="/packages/meta" title="View the latest version of meta">1.16.0</a></span></div><div class="detail-tags-and-like"><div class="detail-tags"><div class="-pub-tag-badge"><span class="tag-badge-main">SDK</span><a class="tag-badge-sub" href="/packages?q=sdk%3Adart" rel="nofollow" title="Packages compatible with Dart SDK">Dart</a><a class="tag-badge-sub" href="/packages?q=sdk%3Aflutter" rel="nofollow" title="Packages compatible with Flutter SDK">Flutter</a></div><div class="-pub-tag-badge"><span class="tag-badge-main">Platform</span><a class="tag-badge-sub" href="/packages?q=platform%3Aandroid" rel="nofollow" title="Packages compatible with Android platform">Android</a><a class="tag-badge-sub" href="/packages?q=platform%3Aios" rel="nofollow" title="Packages compatible with iOS platform">iOS</a><a class="tag-badge-sub" href="/packages?q=platform%3Alinux" rel="nofollow" title="Packages compatible with Linux platform">Linux</a><a class="tag-badge-sub" href="/packages?q=platform%3Amacos" rel="nofollow" title="Packages compatible with macOS platform">macOS</a><a class="tag-badge-sub" href="/packages?q=platform%3Aweb" rel="nofollow" title="Packages compatible with Web platform">web</a><a class="tag-badge-sub" href="/packages?q=platform%3Awindows" rel="nofollow" title="Packages compatible with Windows platform">Windows</a></div></div><div class="detail-like"><button id="-pub-like-icon-button" class="mdc-icon-button" data-ga-click-event="toggle-like" aria-pressed="false" title="Like this package"><img class="mdc-icon-button__icon" src="/static/hash-o6oemknr/img/like-inactive.svg" alt="liked status: inactive" width="18" height="18"/><img class="mdc-icon-button__icon mdc-icon-button__icon--on" src="/static/hash-o6oemknr/img/like-active.svg" alt="liked status: active" width="18" height="18"/></button><span class="likes-count"><span id="likes-count">431</span></span></div></div></div></div></div></div><div class="detail-container"><div class="detail-lead"><div class="detail-metadata-toggle"><div class="detail-metadata-toggle-icon">→</div><h3 class="detail-lead-title">Metadata</h3></div><p class="detail-lead-text">Annotations used to express developer intentions that can't otherwise be deduced by statically analyzing source code.</p><p class="detail-lead-more"><a class="detail-metadata-toggle">More...</a></p></div></div><div class="detail-body"><div class="detail-tabs"><div class="detail-tabs-wide-header"><div class="detail-container"><ul class="detail-tabs-header"><li class="detail-tab tab-button detail-tab-readme-title -active">Readme</li><li class="detail-tab tab-link detail-tab-changelog-title"><a href="/packages/meta/versions/1.15.0/changelog" role="button">Changelog</a></li><li class="detail-tab tab-link detail-tab-installing-title"><a href="/packages/meta/versions/1.15.0/install" role="button">Installing</a></li><li class="detail-tab tab-link detail-tab-versions-title"><a href="/packages/meta/versions" role="button">Versions</a></li><li class="detail-tab tab-link detail-tab-analysis-title"><a href="/packages/meta/versions/1.15.0/score" role="button">Scores</a></li></ul></div></div><div class="detail-container detail-body-main"><div class="detail-tabs-content"><section class="tab-content detail-tab-readme-content -active markdown-body"><p><a href="https://pub.dev/packages/meta"><img src="https://img.shields.io/pub/v/meta.svg" alt="pub package"></a> <a href="https://pub.dev/packages/meta/publisher"><img src="https://img.shields.io/pub/publisher/meta.svg" alt="package publisher"></a></p> <p>This package defines annotations that can be used by the tools that are shipped with the Dart SDK.</p> <h2 class="hash-header" id="library-structure">Library Structure <a href="#library-structure" class="hash-link">#</a></h2> <p>The annotations in this package are defined in two libraries.</p> <p>The library in <code>meta.dart</code> defines annotations that can be used by static analysis tools to provide a more complete analysis of the code that uses them. Within the SDK, these tools include the command-line analyzer (<code>dart analyze</code>) and the analysis server that is used to power many of the Dart-enabled development tools.</p> <p>The library in <code>dart2js.dart</code> defines annotations that provide hints to dart2js to improve the quality of the JavaScript code that it produces. These annotations are currently experimental and might be removed in a future version of this package.</p> <h2 class="hash-header" id="support">Support <a href="#support" class="hash-link">#</a></h2> <p>Post issues and feature requests on the GitHub <a href="https://github.com/dart-lang/sdk/issues" rel="ugc">issue tracker</a>.</p> <p>Questions and discussions are welcome at the <a href="https://groups.google.com/a/dartlang.org/forum/#!forum/analyzer-discuss" rel="ugc">Dart Analyzer Discussion Group</a>.</p> <h2 class="hash-header" id="license">License <a href="#license" class="hash-link">#</a></h2> <p>See the <a href="https://github.com/dart-lang/sdk/blob/main/pkg/analyzer/LICENSE" rel="ugc">LICENSE</a> file.</p> </section></div></div></div><aside class="detail-info-box"><a class="packages-scores" href="/packages/meta/versions/1.15.0/score"><div class="packages-score packages-score-like"><div class="packages-score-value -has-value"><span class="packages-score-value-number">431</span><span class="packages-score-value-sign"></span></div><div class="packages-score-label">likes</div></div><div class="packages-score packages-score-health"><div class="packages-score-value -has-value"><span class="packages-score-value-number">140</span><span class="packages-score-value-sign"></span></div><div class="packages-score-label">pub points</div></div><div class="packages-score packages-score-popularity"><div class="packages-score-value -has-value"><span class="packages-score-value-number">99</span><span class="packages-score-value-sign">%</span></div><div class="packages-score-label">popularity</div></div></a><h3 class="title">Publisher</h3><p><a href="/publishers/dart.dev"><img class="-pub-publisher-shield filter-invert-on-dark" src="/static/hash-o6oemknr/img/material-icon-verified.svg" alt="verified publisher" width="14" height="14" title="Published by a pub.dev verified publisher"/>dart.dev</a></p><h3 class="title pkg-infobox-metadata">Metadata</h3><p>Annotations used to express developer intentions that can't otherwise be deduced by statically analyzing source code.</p><p><a class="link" href="https://github.com/dart-lang/sdk/tree/main/pkg/meta" rel="ugc">Repository (GitHub)</a><br/><a class="link" href="https://github.com/dart-lang/sdk/issues" rel="ugc">View/report issues</a><br/></p><h3 class="title">Documentation</h3><p><a class="link" href="/documentation/meta/1.15.0/">API reference</a><br/></p><h3 class="title">License</h3><p><img class="inline-icon-img filter-invert-on-dark" src="/static/hash-o6oemknr/img/material-icon-balance.svg" alt="" width="14" height="14" role="presentation"/>BSD-3-Clause (<a href="/packages/meta/versions/1.15.0/license">license</a>)</p><h3 class="title">More</h3><p><a href="/packages?q=dependency%3Ameta" rel="nofollow">Packages that depend on meta</a></p></aside></div><script type="application/ld+json">{"@context":"http\u003a\u002f\u002fschema.org","@type":"SoftwareSourceCode","name":"meta","version":"1.15.0","description":"meta - Annotations used to express developer intentions that can\u0027t otherwise be deduced by statically analyzing source code.","url":"https\u003a\u002f\u002fpub.dev\u002fpackages\u002fmeta","dateCreated":"2012-11-30T21\u003a24\u003a54.760Z","dateModified":"2024-05-07T15\u003a58\u003a58.517731Z","programmingLanguage":"Dart","image":"https\u003a\u002f\u002fpub.dev\u002fstatic\u002fimg\u002fpub-dev-icon-cover-image.png","license":"https\u003a\u002f\u002fpub.dev\u002fpackages\u002fmeta\u002fversions\u002f1.15.0\u002flicense"}</script></div><div class="detail-metadata"><h3 class="detail-metadata-title"><span class="detail-metadata-toggle">←</span> Metadata</h3><div class="detail-info-box"><a class="packages-scores" href="/packages/meta/versions/1.15.0/score"><div class="packages-score packages-score-like"><div class="packages-score-value -has-value"><span class="packages-score-value-number">431</span><span class="packages-score-value-sign"></span></div><div class="packages-score-label">likes</div></div><div class="packages-score packages-score-health"><div class="packages-score-value -has-value"><span class="packages-score-value-number">140</span><span class="packages-score-value-sign"></span></div><div class="packages-score-label">pub points</div></div><div class="packages-score packages-score-popularity"><div class="packages-score-value -has-value"><span class="packages-score-value-number">99</span><span class="packages-score-value-sign">%</span></div><div class="packages-score-label">popularity</div></div></a><h3 class="title">Publisher</h3><p><a href="/publishers/dart.dev"><img class="-pub-publisher-shield filter-invert-on-dark" src="/static/hash-o6oemknr/img/material-icon-verified.svg" alt="verified publisher" width="14" height="14" title="Published by a pub.dev verified publisher"/>dart.dev</a></p><h3 class="title pkg-infobox-metadata">Metadata</h3><p>Annotations used to express developer intentions that can't otherwise be deduced by statically analyzing source code.</p><p><a class="link" href="https://github.com/dart-lang/sdk/tree/main/pkg/meta" rel="ugc">Repository (GitHub)</a><br/><a class="link" href="https://github.com/dart-lang/sdk/issues" rel="ugc">View/report issues</a><br/></p><h3 class="title">Documentation</h3><p><a class="link" href="/documentation/meta/1.15.0/">API reference</a><br/></p><h3 class="title">License</h3><p><img class="inline-icon-img filter-invert-on-dark" src="/static/hash-o6oemknr/img/material-icon-balance.svg" alt="" width="14" height="14" role="presentation"/>BSD-3-Clause (<a href="/packages/meta/versions/1.15.0/license">license</a>)</p><h3 class="title">More</h3><p><a href="/packages?q=dependency%3Ameta" rel="nofollow">Packages that depend on meta</a></p></div><p class="detail-lead-back"><a class="detail-metadata-toggle">Back</a></p></div><div id="-screenshot-carousel" class="carousel"><fab id="-carousel-prev" class="mdc-fab carousel-prev carousel-nav" data-mdc-auto-init="MDCRipple" title="Previous" data-ga-click-event="screenshot-carousel-prev-click" tabindex="0"><div class="mdc-fab__ripple"></div><img class="mdc-fab__icon" src="/static/hash-o6oemknr/img/keyboard_arrow_left.svg" alt="previous" width="24" height="24" aria-hidden="true"/></fab><div id="-image-container" class="image-container"></div><fab id="-carousel-next" class="mdc-fab carousel-next carousel-nav" data-mdc-auto-init="MDCRipple" title="Next" data-ga-click-event="screenshot-carousel-next-click" tabindex="0"><div class="mdc-fab__ripple"></div><img class="mdc-fab__icon" src="/static/hash-o6oemknr/img/keyboard_arrow_right.svg" alt="next" width="24" height="24" aria-hidden="true"/></fab><p id="-screenshot-description" class="screenshot-description"></p></div></main><footer class="site-footer"><a class="link" href="https://dart.dev/">Dart language</a><a class="link sep" href="/report?subject=package-version%3Ameta%2F1.15.0&url=https%3A%2F%2Fpub.dev%2Fpackages%2Fmeta%2Fversions%2F1.15.0">Report package</a><a class="link sep" href="/policy">Policy</a><a class="link sep" href="https://www.google.com/intl/en/policies/terms/">Terms</a><a class="link sep" href="https://developers.google.com/terms/">API Terms</a><a class="link sep" href="/security">Security</a><a class="link sep" href="https://www.google.com/intl/en/policies/privacy/">Privacy</a><a class="link sep" href="/help">Help</a><a class="link icon sep" href="/feed.atom"><img class="inline-icon" src="/static/hash-o6oemknr/img/rss-feed-icon.svg" alt="RSS" width="20" height="20" title="RSS/atom feed"/></a><a class="link icon github_issue" href="https://github.com/dart-lang/pub-dev/issues/new"><img class="inline-icon" src="/static/hash-o6oemknr/img/bug-report-white-96px.png" alt="bug report" width="20" height="20" title="Report an issue with this site"/></a></footer><script src="/static/hash-o6oemknr/highlight/highlight-with-init.js" defer="defer"></script></body></html>