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class="col docItemCol_VOVn"><div class=docItemContainer_Djhp><article><nav class="theme-doc-breadcrumbs breadcrumbsContainer_Z_bl" aria-label=页面路径><ul class=breadcrumbs><li class=breadcrumbs__item><a aria-label=主页面 class=breadcrumbs__link href=/zh-CN/><svg viewBox="0 0 24 24" class=breadcrumbHomeIcon_YNFT><path d="M10 19v-5h4v5c0 .55.45 1 1 1h3c.55 0 1-.45 1-1v-7h1.7c.46 0 .68-.57.33-.87L12.67 3.6c-.38-.34-.96-.34-1.34 0l-8.36 7.53c-.34.3-.13.87.33.87H5v7c0 .55.45 1 1 1h3c.55 0 1-.45 1-1z" fill=currentColor /></svg></a><li class=breadcrumbs__item><span class=breadcrumbs__link>用户指南</span><li class=breadcrumbs__item><a class=breadcrumbs__link href=/zh-CN/docs/guide/rust/><span>Rust</span></a><li class="breadcrumbs__item breadcrumbs__item--active"><span class=breadcrumbs__link>Trait 对象序列化</span></ul></nav><span class="theme-doc-version-badge badge badge--secondary">版本：1.3.0</span><div class="tocCollapsible_ETCw theme-doc-toc-mobile tocMobile_ITEo"><button type=button class="clean-btn tocCollapsibleButton_TO0P">本页总览</button></div><div class="theme-doc-markdown markdown"><header><h1>Trait 对象序列化</h1></header><p>Apache Fory™ 通过 trait 对象支持多态序列化，实现动态分发和类型灵活性。</p> |
| <h2 class="anchor anchorTargetStickyNavbar_Vzrq" id=支持的-trait-对象类型>支持的 Trait 对象类型<a href=#支持的-trait-对象类型 class=hash-link aria-label="支持的 Trait 对象类型的直接链接" title="支持的 Trait 对象类型的直接链接" translate=no></a></h2> |
| <ul> |
| <li class=""><code>Box<dyn Trait></code> - 拥有所有权的 trait 对象</li> |
| <li class=""><code>Rc<dyn Trait></code> - 引用计数 trait 对象</li> |
| <li class=""><code>Arc<dyn Trait></code> - 线程安全引用计数 trait 对象</li> |
| <li class=""><code>Vec<Box<dyn Trait>></code>、<code>HashMap<K, Box<dyn Trait>></code> - trait 对象集合</li> |
| </ul> |
| <h2 class="anchor anchorTargetStickyNavbar_Vzrq" id=基础-trait-对象序列化>基础 Trait 对象序列化<a href=#基础-trait-对象序列化 class=hash-link aria-label="基础 Trait 对象序列化的直接链接" title="基础 Trait 对象序列化的直接链接" translate=no></a></h2> |
| <div class="language-rust codeBlockContainer_Ckt0 theme-code-block" style=--prism-color:#393A34;--prism-background-color:#f6f8fa><div class=codeBlockContent_QJqH><pre tabindex=0 class="prism-code language-rust codeBlock_bY9V thin-scrollbar" style=color:#393A34;background-color:#f6f8fa><code class=codeBlockLines_e6Vv><div class=token-line style=color:#393A34><span class="token keyword" style=color:#00009f>use</span><span class="token plain"> </span><span class="token namespace" style=opacity:0.7>fory</span><span class="token namespace punctuation" style=opacity:0.7;color:#393A34>::</span><span class="token punctuation" style=color:#393A34>{</span><span class="token class-name">Fory</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> register_trait_type</span><span class="token punctuation" style=color:#393A34>}</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>use</span><span class="token plain"> </span><span class="token namespace" style=opacity:0.7>fory</span><span class="token namespace punctuation" style=opacity:0.7;color:#393A34>::</span><span class="token class-name">Serializer</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>use</span><span class="token plain"> </span><span class="token namespace" style=opacity:0.7>fory</span><span class="token namespace punctuation" style=opacity:0.7;color:#393A34>::</span><span class="token class-name">ForyObject</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>trait</span><span class="token plain"> </span><span class="token type-definition class-name">Animal</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token class-name">Serializer</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token keyword" style=color:#00009f>fn</span><span class="token plain"> </span><span class="token function-definition function" style=color:#d73a49>speak</span><span class="token punctuation" style=color:#393A34>(</span><span class="token operator" style=color:#393A34>&</span><span class="token keyword" style=color:#00009f>self</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>-></span><span class="token plain"> </span><span class="token class-name">String</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token keyword" style=color:#00009f>fn</span><span class="token plain"> </span><span class="token function-definition function" style=color:#d73a49>name</span><span class="token punctuation" style=color:#393A34>(</span><span class="token operator" style=color:#393A34>&</span><span class="token keyword" style=color:#00009f>self</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>-></span><span class="token plain"> </span><span class="token operator" style=color:#393A34>&</span><span class="token keyword" style=color:#00009f>str</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token punctuation" style=color:#393A34>}</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token attribute attr-name" style=color:#00a4db>#[derive(ForyObject)]</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>struct</span><span class="token plain"> </span><span class="token type-definition class-name">Dog</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"> name</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token class-name">String</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> breed</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token class-name">String</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>}</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>impl</span><span class="token plain"> </span><span class="token class-name">Animal</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>for</span><span class="token plain"> </span><span class="token class-name">Dog</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token keyword" style=color:#00009f>fn</span><span class="token plain"> </span><span class="token function-definition function" style=color:#d73a49>speak</span><span class="token punctuation" style=color:#393A34>(</span><span class="token operator" style=color:#393A34>&</span><span class="token keyword" style=color:#00009f>self</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>-></span><span class="token plain"> </span><span class="token class-name">String</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"> </span><span class="token string" style=color:#e3116c>"Woof!"</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>to_string</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>}</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token keyword" style=color:#00009f>fn</span><span class="token plain"> </span><span class="token function-definition function" style=color:#d73a49>name</span><span class="token punctuation" style=color:#393A34>(</span><span class="token operator" style=color:#393A34>&</span><span class="token keyword" style=color:#00009f>self</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>-></span><span class="token plain"> </span><span class="token operator" style=color:#393A34>&</span><span class="token keyword" style=color:#00009f>str</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"> </span><span class="token operator" style=color:#393A34>&</span><span class="token keyword" style=color:#00009f>self</span><span class="token punctuation" style=color:#393A34>.</span><span class="token plain">name </span><span class="token punctuation" style=color:#393A34>}</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token punctuation" style=color:#393A34>}</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token attribute attr-name" style=color:#00a4db>#[derive(ForyObject)]</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>struct</span><span class="token plain"> </span><span class="token type-definition class-name">Cat</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"> name</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token class-name">String</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> color</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token class-name">String</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>}</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>impl</span><span class="token plain"> </span><span class="token class-name">Animal</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>for</span><span class="token plain"> </span><span class="token class-name">Cat</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token keyword" style=color:#00009f>fn</span><span class="token plain"> </span><span class="token function-definition function" style=color:#d73a49>speak</span><span class="token punctuation" style=color:#393A34>(</span><span class="token operator" style=color:#393A34>&</span><span class="token keyword" style=color:#00009f>self</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>-></span><span class="token plain"> </span><span class="token class-name">String</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"> </span><span class="token string" style=color:#e3116c>"Meow!"</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>to_string</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>}</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token keyword" style=color:#00009f>fn</span><span class="token plain"> </span><span class="token function-definition function" style=color:#d73a49>name</span><span class="token punctuation" style=color:#393A34>(</span><span class="token operator" style=color:#393A34>&</span><span class="token keyword" style=color:#00009f>self</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>-></span><span class="token plain"> </span><span class="token operator" style=color:#393A34>&</span><span class="token keyword" style=color:#00009f>str</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"> </span><span class="token operator" style=color:#393A34>&</span><span class="token keyword" style=color:#00009f>self</span><span class="token punctuation" style=color:#393A34>.</span><span class="token plain">name </span><span class="token punctuation" style=color:#393A34>}</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token punctuation" style=color:#393A34>}</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token comment" style=color:#999988;font-style:italic>// 注册 trait 实现</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token macro property" style=color:#36acaa>register_trait_type!</span><span class="token punctuation" style=color:#393A34>(</span><span class="token class-name">Animal</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> </span><span class="token class-name">Dog</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> </span><span class="token class-name">Cat</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token attribute attr-name" style=color:#00a4db>#[derive(ForyObject)]</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>struct</span><span class="token plain"> </span><span class="token type-definition class-name">Zoo</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> star_animal</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token class-name">Box</span><span class="token operator" style=color:#393A34><</span><span class="token keyword" style=color:#00009f>dyn</span><span class="token plain"> </span><span class="token class-name">Animal</span><span class="token operator" style=color:#393A34>></span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token punctuation" style=color:#393A34>}</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>let</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>mut</span><span class="token plain"> fory </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> </span><span class="token class-name">Fory</span><span class="token punctuation" style=color:#393A34>::</span><span class="token function" style=color:#d73a49>default</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>compatible</span><span class="token punctuation" style=color:#393A34>(</span><span class="token boolean" style=color:#36acaa>true</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain">fory</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>register</span><span class="token punctuation" style=color:#393A34>::</span><span class="token operator" style=color:#393A34><</span><span class="token class-name">Dog</span><span class="token operator" style=color:#393A34>></span><span class="token punctuation" style=color:#393A34>(</span><span class="token number" style=color:#36acaa>100</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain">fory</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>register</span><span class="token punctuation" style=color:#393A34>::</span><span class="token operator" style=color:#393A34><</span><span class="token class-name">Cat</span><span class="token operator" style=color:#393A34>></span><span class="token punctuation" style=color:#393A34>(</span><span class="token number" style=color:#36acaa>101</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain">fory</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>register</span><span class="token punctuation" style=color:#393A34>::</span><span class="token operator" style=color:#393A34><</span><span class="token class-name">Zoo</span><span class="token operator" style=color:#393A34>></span><span class="token punctuation" style=color:#393A34>(</span><span class="token number" style=color:#36acaa>102</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>let</span><span class="token plain"> zoo </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> </span><span class="token class-name">Zoo</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> star_animal</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token class-name">Box</span><span class="token punctuation" style=color:#393A34>::</span><span class="token function" style=color:#d73a49>new</span><span class="token punctuation" style=color:#393A34>(</span><span class="token class-name">Dog</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> name</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token string" style=color:#e3116c>"Buddy"</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>to_string</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> breed</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token string" style=color:#e3116c>"Labrador"</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>to_string</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>}</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token punctuation" style=color:#393A34>}</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>let</span><span class="token plain"> bytes </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> fory</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>serialize</span><span class="token punctuation" style=color:#393A34>(</span><span class="token operator" style=color:#393A34>&</span><span class="token plain">zoo</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>let</span><span class="token plain"> decoded</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token class-name">Zoo</span><span class="token plain"> </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> fory</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>deserialize</span><span class="token punctuation" style=color:#393A34>(</span><span class="token operator" style=color:#393A34>&</span><span class="token plain">bytes</span><span class="token punctuation" style=color:#393A34>)</span><span class="token operator" style=color:#393A34>?</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token macro property" style=color:#36acaa>assert_eq!</span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain">decoded</span><span class="token punctuation" style=color:#393A34>.</span><span class="token plain">star_animal</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>name</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> </span><span class="token string" style=color:#e3116c>"Buddy"</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token macro property" style=color:#36acaa>assert_eq!</span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain">decoded</span><span class="token punctuation" style=color:#393A34>.</span><span class="token plain">star_animal</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>speak</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> </span><span class="token string" style=color:#e3116c>"Woof!"</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><br/></div></code></pre></div></div> |
| <h2 class="anchor anchorTargetStickyNavbar_Vzrq" id=序列化-dyn-any-trait-对象>序列化 dyn Any Trait 对象<a href=#序列化-dyn-any-trait-对象 class=hash-link aria-label="序列化 dyn Any Trait 对象的直接链接" title="序列化 dyn Any Trait 对象的直接链接" translate=no></a></h2> |
| <p>Apache Fory™ 支持序列化 <code>Rc<dyn Any></code> 和 <code>Arc<dyn Any></code> 以实现运行时类型分发：</p> |
| <p><strong>要点：</strong></p> |
| <ul> |
| <li class="">适用于任何实现 <code>Serializer</code> 的类型</li> |
| <li class="">反序列化后需要向下转型以访问具体类型</li> |
| <li class="">序列化期间保留类型信息</li> |
| <li class="">对插件系统和动态类型处理很有用</li> |
| </ul> |
| <div class="language-rust codeBlockContainer_Ckt0 theme-code-block" style=--prism-color:#393A34;--prism-background-color:#f6f8fa><div class=codeBlockContent_QJqH><pre tabindex=0 class="prism-code language-rust codeBlock_bY9V thin-scrollbar" style=color:#393A34;background-color:#f6f8fa><code class=codeBlockLines_e6Vv><div class=token-line style=color:#393A34><span class="token keyword" style=color:#00009f>use</span><span class="token plain"> </span><span class="token namespace" style=opacity:0.7>std</span><span class="token namespace punctuation" style=opacity:0.7;color:#393A34>::</span><span class="token namespace" style=opacity:0.7>rc</span><span class="token namespace punctuation" style=opacity:0.7;color:#393A34>::</span><span class="token class-name">Rc</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>use</span><span class="token plain"> </span><span class="token namespace" style=opacity:0.7>std</span><span class="token namespace punctuation" style=opacity:0.7;color:#393A34>::</span><span class="token namespace" style=opacity:0.7>any</span><span class="token namespace punctuation" style=opacity:0.7;color:#393A34>::</span><span class="token class-name">Any</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>let</span><span class="token plain"> dog_rc</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token class-name">Rc</span><span class="token operator" style=color:#393A34><</span><span class="token keyword" style=color:#00009f>dyn</span><span class="token plain"> </span><span class="token class-name">Animal</span><span class="token operator" style=color:#393A34>></span><span class="token plain"> </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> </span><span class="token class-name">Rc</span><span class="token punctuation" style=color:#393A34>::</span><span class="token function" style=color:#d73a49>new</span><span class="token punctuation" style=color:#393A34>(</span><span class="token class-name">Dog</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> name</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token string" style=color:#e3116c>"Rex"</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>to_string</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> breed</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token string" style=color:#e3116c>"Golden"</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>to_string</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token punctuation" style=color:#393A34>}</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token comment" style=color:#999988;font-style:italic>// 转换为 Rc<dyn Any> 以进行序列化</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>let</span><span class="token plain"> dog_any</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token class-name">Rc</span><span class="token operator" style=color:#393A34><</span><span class="token keyword" style=color:#00009f>dyn</span><span class="token plain"> </span><span class="token class-name">Any</span><span class="token operator" style=color:#393A34>></span><span class="token plain"> </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> dog_rc</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>clone</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token comment" style=color:#999988;font-style:italic>// 序列化 Any 包装器</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>let</span><span class="token plain"> bytes </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> fory</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>serialize</span><span class="token punctuation" style=color:#393A34>(</span><span class="token operator" style=color:#393A34>&</span><span class="token plain">dog_any</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>let</span><span class="token plain"> decoded</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token class-name">Rc</span><span class="token operator" style=color:#393A34><</span><span class="token keyword" style=color:#00009f>dyn</span><span class="token plain"> </span><span class="token class-name">Any</span><span class="token operator" style=color:#393A34>></span><span class="token plain"> </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> fory</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>deserialize</span><span class="token punctuation" style=color:#393A34>(</span><span class="token operator" style=color:#393A34>&</span><span class="token plain">bytes</span><span class="token punctuation" style=color:#393A34>)</span><span class="token operator" style=color:#393A34>?</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token comment" style=color:#999988;font-style:italic>// 向下转型回具体类型</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>let</span><span class="token plain"> unwrapped </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> decoded</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>downcast_ref</span><span class="token punctuation" style=color:#393A34>::</span><span class="token operator" style=color:#393A34><</span><span class="token class-name">Dog</span><span class="token operator" style=color:#393A34>></span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>unwrap</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token macro property" style=color:#36acaa>assert_eq!</span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain">unwrapped</span><span class="token punctuation" style=color:#393A34>.</span><span class="token plain">name</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> </span><span class="token string" style=color:#e3116c>"Rex"</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><br/></div></code></pre></div></div> |
| <p>对于线程安全场景，使用 <code>Arc<dyn Any></code>：</p> |
| <div class="language-rust codeBlockContainer_Ckt0 theme-code-block" style=--prism-color:#393A34;--prism-background-color:#f6f8fa><div class=codeBlockContent_QJqH><pre tabindex=0 class="prism-code language-rust codeBlock_bY9V thin-scrollbar" style=color:#393A34;background-color:#f6f8fa><code class=codeBlockLines_e6Vv><div class=token-line style=color:#393A34><span class="token keyword" style=color:#00009f>use</span><span class="token plain"> </span><span class="token namespace" style=opacity:0.7>std</span><span class="token namespace punctuation" style=opacity:0.7;color:#393A34>::</span><span class="token namespace" style=opacity:0.7>sync</span><span class="token namespace punctuation" style=opacity:0.7;color:#393A34>::</span><span class="token class-name">Arc</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>use</span><span class="token plain"> </span><span class="token namespace" style=opacity:0.7>std</span><span class="token namespace punctuation" style=opacity:0.7;color:#393A34>::</span><span class="token namespace" style=opacity:0.7>any</span><span class="token namespace punctuation" style=opacity:0.7;color:#393A34>::</span><span class="token class-name">Any</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>let</span><span class="token plain"> dog_arc</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token class-name">Arc</span><span class="token operator" style=color:#393A34><</span><span class="token keyword" style=color:#00009f>dyn</span><span class="token plain"> </span><span class="token class-name">Animal</span><span class="token operator" style=color:#393A34>></span><span class="token plain"> </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> </span><span class="token class-name">Arc</span><span class="token punctuation" style=color:#393A34>::</span><span class="token function" style=color:#d73a49>new</span><span class="token punctuation" style=color:#393A34>(</span><span class="token class-name">Dog</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> name</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token string" style=color:#e3116c>"Buddy"</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>to_string</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> breed</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token string" style=color:#e3116c>"Labrador"</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>to_string</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token punctuation" style=color:#393A34>}</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token comment" style=color:#999988;font-style:italic>// 转换为 Arc<dyn Any></span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>let</span><span class="token plain"> dog_any</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token class-name">Arc</span><span class="token operator" style=color:#393A34><</span><span class="token keyword" style=color:#00009f>dyn</span><span class="token plain"> </span><span class="token class-name">Any</span><span class="token operator" style=color:#393A34>></span><span class="token plain"> </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> dog_arc</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>clone</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>let</span><span class="token plain"> bytes </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> fory</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>serialize</span><span class="token punctuation" style=color:#393A34>(</span><span class="token operator" style=color:#393A34>&</span><span class="token plain">dog_any</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>let</span><span class="token plain"> decoded</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token class-name">Arc</span><span class="token operator" style=color:#393A34><</span><span class="token keyword" style=color:#00009f>dyn</span><span class="token plain"> </span><span class="token class-name">Any</span><span class="token operator" style=color:#393A34>></span><span class="token plain"> </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> fory</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>deserialize</span><span class="token punctuation" style=color:#393A34>(</span><span class="token operator" style=color:#393A34>&</span><span class="token plain">bytes</span><span class="token punctuation" style=color:#393A34>)</span><span class="token operator" style=color:#393A34>?</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token comment" style=color:#999988;font-style:italic>// 向下转型为具体类型</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>let</span><span class="token plain"> unwrapped </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> decoded</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>downcast_ref</span><span class="token punctuation" style=color:#393A34>::</span><span class="token operator" style=color:#393A34><</span><span class="token class-name">Dog</span><span class="token operator" style=color:#393A34>></span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>unwrap</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token macro property" style=color:#36acaa>assert_eq!</span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain">unwrapped</span><span class="token punctuation" style=color:#393A34>.</span><span class="token plain">name</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> </span><span class="token string" style=color:#e3116c>"Buddy"</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><br/></div></code></pre></div></div> |
| <h2 class="anchor anchorTargetStickyNavbar_Vzrq" id=结构体中基于-rcarc-的-trait-对象>结构体中基于 Rc/Arc 的 Trait 对象<a href=#结构体中基于-rcarc-的-trait-对象 class=hash-link aria-label="结构体中基于 Rc/Arc 的 Trait 对象的直接链接" title="结构体中基于 Rc/Arc 的 Trait 对象的直接链接" translate=no></a></h2> |
| <p>对于具有 <code>Rc<dyn Trait></code> 或 <code>Arc<dyn Trait></code> 的字段，Fory 自动处理转换：</p> |
| <div class="language-rust codeBlockContainer_Ckt0 theme-code-block" style=--prism-color:#393A34;--prism-background-color:#f6f8fa><div class=codeBlockContent_QJqH><pre tabindex=0 class="prism-code language-rust codeBlock_bY9V thin-scrollbar" style=color:#393A34;background-color:#f6f8fa><code class=codeBlockLines_e6Vv><div class=token-line style=color:#393A34><span class="token keyword" style=color:#00009f>use</span><span class="token plain"> </span><span class="token namespace" style=opacity:0.7>std</span><span class="token namespace punctuation" style=opacity:0.7;color:#393A34>::</span><span class="token namespace" style=opacity:0.7>sync</span><span class="token namespace punctuation" style=opacity:0.7;color:#393A34>::</span><span class="token class-name">Arc</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>use</span><span class="token plain"> </span><span class="token namespace" style=opacity:0.7>std</span><span class="token namespace punctuation" style=opacity:0.7;color:#393A34>::</span><span class="token namespace" style=opacity:0.7>rc</span><span class="token namespace punctuation" style=opacity:0.7;color:#393A34>::</span><span class="token class-name">Rc</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>use</span><span class="token plain"> </span><span class="token namespace" style=opacity:0.7>std</span><span class="token namespace punctuation" style=opacity:0.7;color:#393A34>::</span><span class="token namespace" style=opacity:0.7>collections</span><span class="token namespace punctuation" style=opacity:0.7;color:#393A34>::</span><span class="token class-name">HashMap</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token attribute attr-name" style=color:#00a4db>#[derive(ForyObject)]</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>struct</span><span class="token plain"> </span><span class="token type-definition class-name">AnimalShelter</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> animals_rc</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token class-name">Vec</span><span class="token operator" style=color:#393A34><</span><span class="token class-name">Rc</span><span class="token operator" style=color:#393A34><</span><span class="token keyword" style=color:#00009f>dyn</span><span class="token plain"> </span><span class="token class-name">Animal</span><span class="token operator" style=color:#393A34>>></span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> animals_arc</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token class-name">Vec</span><span class="token operator" style=color:#393A34><</span><span class="token class-name">Arc</span><span class="token operator" style=color:#393A34><</span><span class="token keyword" style=color:#00009f>dyn</span><span class="token plain"> </span><span class="token class-name">Animal</span><span class="token operator" style=color:#393A34>>></span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> registry</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token class-name">HashMap</span><span class="token operator" style=color:#393A34><</span><span class="token class-name">String</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> </span><span class="token class-name">Arc</span><span class="token operator" style=color:#393A34><</span><span class="token keyword" style=color:#00009f>dyn</span><span class="token plain"> </span><span class="token class-name">Animal</span><span class="token operator" style=color:#393A34>>></span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token punctuation" style=color:#393A34>}</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>let</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>mut</span><span class="token plain"> fory </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> </span><span class="token class-name">Fory</span><span class="token punctuation" style=color:#393A34>::</span><span class="token function" style=color:#d73a49>default</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>compatible</span><span class="token punctuation" style=color:#393A34>(</span><span class="token boolean" style=color:#36acaa>true</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain">fory</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>register</span><span class="token punctuation" style=color:#393A34>::</span><span class="token operator" style=color:#393A34><</span><span class="token class-name">Dog</span><span class="token operator" style=color:#393A34>></span><span class="token punctuation" style=color:#393A34>(</span><span class="token number" style=color:#36acaa>100</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain">fory</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>register</span><span class="token punctuation" style=color:#393A34>::</span><span class="token operator" style=color:#393A34><</span><span class="token class-name">Cat</span><span class="token operator" style=color:#393A34>></span><span class="token punctuation" style=color:#393A34>(</span><span class="token number" style=color:#36acaa>101</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain">fory</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>register</span><span class="token punctuation" style=color:#393A34>::</span><span class="token operator" style=color:#393A34><</span><span class="token class-name">AnimalShelter</span><span class="token operator" style=color:#393A34>></span><span class="token punctuation" style=color:#393A34>(</span><span class="token number" style=color:#36acaa>102</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>let</span><span class="token plain"> shelter </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> </span><span class="token class-name">AnimalShelter</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> animals_rc</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token macro property" style=color:#36acaa>vec!</span><span class="token punctuation" style=color:#393A34>[</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token class-name">Rc</span><span class="token punctuation" style=color:#393A34>::</span><span class="token function" style=color:#d73a49>new</span><span class="token punctuation" style=color:#393A34>(</span><span class="token class-name">Dog</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"> name</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token string" style=color:#e3116c>"Rex"</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>to_string</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> breed</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token string" style=color:#e3116c>"Golden"</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>to_string</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>}</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token class-name">Rc</span><span class="token punctuation" style=color:#393A34>::</span><span class="token function" style=color:#d73a49>new</span><span class="token punctuation" style=color:#393A34>(</span><span class="token class-name">Cat</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"> name</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token string" style=color:#e3116c>"Mittens"</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>to_string</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> color</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token string" style=color:#e3116c>"Gray"</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>to_string</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>}</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>]</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> animals_arc</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token macro property" style=color:#36acaa>vec!</span><span class="token punctuation" style=color:#393A34>[</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token class-name">Arc</span><span class="token punctuation" style=color:#393A34>::</span><span class="token function" style=color:#d73a49>new</span><span class="token punctuation" style=color:#393A34>(</span><span class="token class-name">Dog</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"> name</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token string" style=color:#e3116c>"Buddy"</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>to_string</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> breed</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token string" style=color:#e3116c>"Labrador"</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>to_string</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>}</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>]</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> registry</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token class-name">HashMap</span><span class="token punctuation" style=color:#393A34>::</span><span class="token function" style=color:#d73a49>from</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>[</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>(</span><span class="token string" style=color:#e3116c>"pet1"</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>to_string</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> </span><span class="token class-name">Arc</span><span class="token punctuation" style=color:#393A34>::</span><span class="token function" style=color:#d73a49>new</span><span class="token punctuation" style=color:#393A34>(</span><span class="token class-name">Dog</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> name</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token string" style=color:#e3116c>"Max"</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>to_string</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> breed</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token string" style=color:#e3116c>"Shepherd"</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>to_string</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>}</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>as</span><span class="token plain"> </span><span class="token class-name">Arc</span><span class="token operator" style=color:#393A34><</span><span class="token keyword" style=color:#00009f>dyn</span><span class="token plain"> </span><span class="token class-name">Animal</span><span class="token operator" style=color:#393A34>></span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>]</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token punctuation" style=color:#393A34>}</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>let</span><span class="token plain"> bytes </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> fory</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>serialize</span><span class="token punctuation" style=color:#393A34>(</span><span class="token operator" style=color:#393A34>&</span><span class="token plain">shelter</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>let</span><span class="token plain"> decoded</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token class-name">AnimalShelter</span><span class="token plain"> </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> fory</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>deserialize</span><span class="token punctuation" style=color:#393A34>(</span><span class="token operator" style=color:#393A34>&</span><span class="token plain">bytes</span><span class="token punctuation" style=color:#393A34>)</span><span class="token operator" style=color:#393A34>?</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token macro property" style=color:#36acaa>assert_eq!</span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain">decoded</span><span class="token punctuation" style=color:#393A34>.</span><span class="token plain">animals_rc</span><span class="token punctuation" style=color:#393A34>[</span><span class="token number" style=color:#36acaa>0</span><span class="token punctuation" style=color:#393A34>]</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>name</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> </span><span class="token string" style=color:#e3116c>"Rex"</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token macro property" style=color:#36acaa>assert_eq!</span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain">decoded</span><span class="token punctuation" style=color:#393A34>.</span><span class="token plain">animals_arc</span><span class="token punctuation" style=color:#393A34>[</span><span class="token number" style=color:#36acaa>0</span><span class="token punctuation" style=color:#393A34>]</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>speak</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> </span><span class="token string" style=color:#e3116c>"Woof!"</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><br/></div></code></pre></div></div> |
| <h2 class="anchor anchorTargetStickyNavbar_Vzrq" id=独立-trait-对象序列化>独立 Trait 对象序列化<a href=#独立-trait-对象序列化 class=hash-link aria-label="独立 Trait 对象序列化的直接链接" title="独立 Trait 对象序列化的直接链接" translate=no></a></h2> |
| <p>由于 Rust 的孤儿规则，<code>Rc<dyn Trait></code> 和 <code>Arc<dyn Trait></code> 不能直接实现 <code>Serializer</code>。对于独立序列化（不在结构体字段内），<code>register_trait_type!</code> 宏生成包装类型。</p> |
| <p><strong>注意：</strong> 如果不想使用包装类型，可以改为序列化为 <code>Rc<dyn Any></code> 或 <code>Arc<dyn Any></code>（参见上面的 dyn Any 部分）。</p> |
| <p><code>register_trait_type!</code> 宏生成 <code>AnimalRc</code> 和 <code>AnimalArc</code> 包装类型：</p> |
| <div class="language-rust codeBlockContainer_Ckt0 theme-code-block" style=--prism-color:#393A34;--prism-background-color:#f6f8fa><div class=codeBlockContent_QJqH><pre tabindex=0 class="prism-code language-rust codeBlock_bY9V thin-scrollbar" style=color:#393A34;background-color:#f6f8fa><code class=codeBlockLines_e6Vv><div class=token-line style=color:#393A34><span class="token comment" style=color:#999988;font-style:italic>// 对于 Rc<dyn Trait></span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>let</span><span class="token plain"> dog_rc</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token class-name">Rc</span><span class="token operator" style=color:#393A34><</span><span class="token keyword" style=color:#00009f>dyn</span><span class="token plain"> </span><span class="token class-name">Animal</span><span class="token operator" style=color:#393A34>></span><span class="token plain"> </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> </span><span class="token class-name">Rc</span><span class="token punctuation" style=color:#393A34>::</span><span class="token function" style=color:#d73a49>new</span><span class="token punctuation" style=color:#393A34>(</span><span class="token class-name">Dog</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> name</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token string" style=color:#e3116c>"Rex"</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>to_string</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> breed</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token string" style=color:#e3116c>"Golden"</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>to_string</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token punctuation" style=color:#393A34>}</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>let</span><span class="token plain"> wrapper </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> </span><span class="token class-name">AnimalRc</span><span class="token punctuation" style=color:#393A34>::</span><span class="token function" style=color:#d73a49>from</span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain">dog_rc</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>let</span><span class="token plain"> bytes </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> fory</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>serialize</span><span class="token punctuation" style=color:#393A34>(</span><span class="token operator" style=color:#393A34>&</span><span class="token plain">wrapper</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>let</span><span class="token plain"> decoded</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token class-name">AnimalRc</span><span class="token plain"> </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> fory</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>deserialize</span><span class="token punctuation" style=color:#393A34>(</span><span class="token operator" style=color:#393A34>&</span><span class="token plain">bytes</span><span class="token punctuation" style=color:#393A34>)</span><span class="token operator" style=color:#393A34>?</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token comment" style=color:#999988;font-style:italic>// 解包回 Rc<dyn Animal></span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>let</span><span class="token plain"> unwrapped</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token class-name">Rc</span><span class="token operator" style=color:#393A34><</span><span class="token keyword" style=color:#00009f>dyn</span><span class="token plain"> </span><span class="token class-name">Animal</span><span class="token operator" style=color:#393A34>></span><span class="token plain"> </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> decoded</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>unwrap</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token macro property" style=color:#36acaa>assert_eq!</span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain">unwrapped</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>name</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> </span><span class="token string" style=color:#e3116c>"Rex"</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token comment" style=color:#999988;font-style:italic>// 对于 Arc<dyn Trait></span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>let</span><span class="token plain"> dog_arc</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token class-name">Arc</span><span class="token operator" style=color:#393A34><</span><span class="token keyword" style=color:#00009f>dyn</span><span class="token plain"> </span><span class="token class-name">Animal</span><span class="token operator" style=color:#393A34>></span><span class="token plain"> </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> </span><span class="token class-name">Arc</span><span class="token punctuation" style=color:#393A34>::</span><span class="token function" style=color:#d73a49>new</span><span class="token punctuation" style=color:#393A34>(</span><span class="token class-name">Dog</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> name</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token string" style=color:#e3116c>"Buddy"</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>to_string</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> breed</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token string" style=color:#e3116c>"Labrador"</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>to_string</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token punctuation" style=color:#393A34>}</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>let</span><span class="token plain"> wrapper </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> </span><span class="token class-name">AnimalArc</span><span class="token punctuation" style=color:#393A34>::</span><span class="token function" style=color:#d73a49>from</span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain">dog_arc</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>let</span><span class="token plain"> bytes </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> fory</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>serialize</span><span class="token punctuation" style=color:#393A34>(</span><span class="token operator" style=color:#393A34>&</span><span class="token plain">wrapper</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>let</span><span class="token plain"> decoded</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token class-name">AnimalArc</span><span class="token plain"> </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> fory</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>deserialize</span><span class="token punctuation" style=color:#393A34>(</span><span class="token operator" style=color:#393A34>&</span><span class="token plain">bytes</span><span class="token punctuation" style=color:#393A34>)</span><span class="token operator" style=color:#393A34>?</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>let</span><span class="token plain"> unwrapped</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token class-name">Arc</span><span class="token operator" style=color:#393A34><</span><span class="token keyword" style=color:#00009f>dyn</span><span class="token plain"> </span><span class="token class-name">Animal</span><span class="token operator" style=color:#393A34>></span><span class="token plain"> </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> decoded</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>unwrap</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token macro property" style=color:#36acaa>assert_eq!</span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain">unwrapped</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>name</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> </span><span class="token string" style=color:#e3116c>"Buddy"</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><br/></div></code></pre></div></div> |
| <h2 class="anchor anchorTargetStickyNavbar_Vzrq" id=最佳实践>最佳实践<a href=#最佳实践 class=hash-link aria-label=最佳实践的直接链接 title=最佳实践的直接链接 translate=no></a></h2> |
| <ol> |
| <li class=""><strong>使用 <code>register_trait_type!</code></strong> 注册所有 trait 实现</li> |
| <li class=""><strong>启用 compatible 模式</strong>：对 trait 对象使用 <code>.compatible(true)</code></li> |
| <li class=""><strong>注册所有具体类型</strong>：在序列化之前</li> |
| <li class=""><strong>优先使用 dyn Any</strong>：对于更简单的独立序列化</li> |
| </ol> |
| <h2 class="anchor anchorTargetStickyNavbar_Vzrq" id=相关主题>相关主题<a href=#相关主题 class=hash-link aria-label=相关主题的直接链接 title=相关主题的直接链接 translate=no></a></h2> |
| <ul> |
| <li class=""><a class="" href=/zh-CN/docs/guide/rust/references>引用</a> - Rc/Arc 共享引用</li> |
| <li class=""><a class="" href=/zh-CN/docs/guide/rust/schema_evolution>Schema 演化</a> - Compatible 模式</li> |
| <li class=""><a class="" href=/zh-CN/docs/guide/rust/type_registration>类型注册</a> - 注册类型</li> |
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