deploy: 9665097f0fa0dae9f92123fac54d26c0818758a5

1 files changed, 2 insertions, 3 deletions

diff --git a/2023/05/24/Rust-闭包-lifetime-may-not-live-long-enough-问题/index.html b/2023/05/24/Rust-闭包-lifetime-may-not-live-long-enough-问题/index.html
index e208733c..a44f767e 100644
--- a/2023/05/24/Rust-闭包-lifetime-may-not-live-long-enough-问题/index.html
+++ b/2023/05/24/Rust-闭包-lifetime-may-not-live-long-enough-问题/index.html
@@ -194,13 +194,12 @@
     <div class="post-content">
     <p>代码：</p>
 <figure class="highlight rust"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br></pre></td><td class="code"><pre><span class="line">...</span><br><span class="line">    <span class="keyword">fn</span> <span class="title function_">handlers</span>(<span class="keyword">self</span>) <span class="punctuation">-&gt;</span> crate::server::request::Handlers &#123;</span><br><span class="line">        <span class="built_in">vec!</span>[(</span><br><span class="line">            <span class="string">&quot;/tree&quot;</span>,</span><br><span class="line">            routing::<span class="title function_ invoke__">get</span>(<span class="keyword">move</span> || <span class="keyword">async</span> &#123;</span><br><span class="line">                (</span><br><span class="line">                    StatusCode::OK,</span><br><span class="line">                    <span class="title function_ invoke__">Json</span>(json!(<span class="keyword">self</span>.<span class="title function_ invoke__">clone</span>().<span class="title function_ invoke__">tree</span>(<span class="keyword">self</span>.<span class="title function_ invoke__">clone</span>().root))),</span><br><span class="line">                )</span><br><span class="line">            &#125;),</span><br><span class="line">        )]</span><br><span class="line">    &#125;</span><br><span class="line">...</span><br></pre></td></tr></table></figure>
-
 <p>编译错误：</p>
 <figure class="highlight text"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br></pre></td><td class="code"><pre><span class="line">error: lifetime may not live long enough</span><br><span class="line">  --&gt; src/storage/filesystem/mod.rs:45:34</span><br><span class="line">   |</span><br><span class="line">45 |               routing::get(move || async &#123;</span><br><span class="line">   |  __________________________-------_^</span><br><span class="line">   | |                          |     |</span><br><span class="line">   | |                          |     return type of closure `&#123;async block@src/storage/filesystem/mod.rs:45:34: 50:14&#125;` contains a lifetime `&#x27;2`</span><br><span class="line">   | |                          lifetime `&#x27;1` represents this closure&#x27;s body</span><br><span class="line">46 | |                 (</span><br><span class="line">47 | |                     StatusCode::OK,</span><br><span class="line">48 | |                     Json(json!(self.clone().tree(self.clone().root))),</span><br><span class="line">49 | |                 )</span><br><span class="line">50 | |             &#125;),</span><br><span class="line">   | |_____________^ returning this value requires that `&#x27;1` must outlive `&#x27;2`</span><br><span class="line">   |</span><br><span class="line">   = note: closure implements `Fn`, so references to captured variables can&#x27;t escape the closure</span><br></pre></td></tr></table></figure>
-
 <p>这是因为 <code>handlers</code> 里面的闭包捕获了一个引用，并且尝试返回一个包含该引用的值导致的。</p>
 <p>细说就是：闭包内部使用了 <code>self.clone()</code> 来获取一个新的实例，然后在异步块中返回一个 JSON 对象，这个 JSON 对象依赖于 <code>self.tree()</code> 的结果。因为闭包捕获了 <code>self</code> 的引用，所以它必须保证 <code>self</code> 在闭包执行完毕后仍然有效。</p>
-<p>解决这个问题的思路是：确保闭包中的所有引用都在闭包执行完毕之前就不再被使用。<br>就是说，要将闭包的作用域限制在一个更短的生命周期内，或者使用其他方式来避免闭包捕获长期存在的引用:</p>
+<p>解决这个问题的思路是：确保闭包中的所有引用都在闭包执行完毕之前就不再被使用。<br>
+就是说，要将闭包的作用域限制在一个更短的生命周期内，或者使用其他方式来避免闭包捕获长期存在的引用:</p>
 <figure class="highlight rust"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br></pre></td><td class="code"><pre><span class="line"></span><br><span class="line">...</span><br><span class="line">    <span class="keyword">fn</span> <span class="title function_">handlers</span>(<span class="keyword">self</span>) <span class="punctuation">-&gt;</span> crate::server::request::Handlers &#123;</span><br><span class="line">        <span class="keyword">let</span> <span class="variable">tree</span> = json!(<span class="keyword">self</span>.<span class="title function_ invoke__">clone</span>().<span class="title function_ invoke__">tree</span>(<span class="keyword">self</span>.<span class="title function_ invoke__">clone</span>().root));</span><br><span class="line">        <span class="built_in">vec!</span>[(</span><br><span class="line">            <span class="string">&quot;/tree&quot;</span>,</span><br><span class="line">            routing::<span class="title function_ invoke__">get</span>(<span class="keyword">move</span> || <span class="keyword">async</span> &#123; (StatusCode::OK, <span class="title function_ invoke__">Json</span>(tree)) &#125;),</span><br><span class="line">        )]</span><br><span class="line">    &#125;</span><br><span class="line">...</span><br></pre></td></tr></table></figure>
 </div>