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Introduce anonymous structs (#474)

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Hossein Naghdbishi 2023-06-05 12:40:49 +00:00 committed by GitHub
parent 1512fb0094
commit 4b9411514f
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4 changed files with 41 additions and 7 deletions
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11
examples/structs/structs.go
View File

@ -50,4 +50,15 @@ func main() {
// Structs are mutable.
sp.age = 51
fmt.Println(sp.age)
// Structs don't always have to be defined as instances of types,
// you can define a struct anonymously.
dog := struct {
name string
isGood bool
}{
"Rex",
true,
}
fmt.Println(dog)
}

4
examples/structs/structs.hash
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@ -1,2 +1,2 @@
f1dcc357b5e20c3aa3a97df8245efe4aea7940d6
n7jt1x3iw4Z
5a15014159c5c98fe5f829c483ded3914db77053
D9lW-Dd6XQP

3
examples/structs/structs.sh
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@ -6,4 +6,5 @@ $ go run structs.go
&{Jon 42}
Sean
50
51
51
{Rex true}

30
public/structs generated
View File

@ -43,7 +43,7 @@ records.</p>
</td>
<td class="code leading">
<a href="https://go.dev/play/p/n7jt1x3iw4Z"><img title="Run code" src="play.png" class="run" /></a><img title="Copy code" src="clipboard.png" class="copy" />
<a href="https://go.dev/play/p/D9lW-Dd6XQP"><img title="Run code" src="play.png" class="run" /></a><img title="Copy code" src="clipboard.png" class="copy" />
<pre class="chroma"><span class="kn">package</span> <span class="nx">main</span>
</pre>
</td>
@ -216,11 +216,32 @@ pointers are automatically dereferenced.</p>
<p>Structs are mutable.</p>
</td>
<td class="code">
<td class="code leading">
<pre class="chroma">
<span class="nx">sp</span><span class="p">.</span><span class="nx">age</span> <span class="p">=</span> <span class="mi">51</span>
<span class="nx">fmt</span><span class="p">.</span><span class="nf">Println</span><span class="p">(</span><span class="nx">sp</span><span class="p">.</span><span class="nx">age</span><span class="p">)</span>
</pre>
</td>
</tr>
<tr>
<td class="docs">
<p>Structs don&rsquo;t always have to be defined as instances of types,
you can define a struct anonymously.</p>
</td>
<td class="code">
<pre class="chroma">
<span class="nx">dog</span> <span class="o">:=</span> <span class="kd">struct</span> <span class="p">{</span>
<span class="nx">name</span> <span class="kt">string</span>
<span class="nx">isGood</span> <span class="kt">bool</span>
<span class="p">}{</span>
<span class="s">&#34;Rex&#34;</span><span class="p">,</span>
<span class="kc">true</span><span class="p">,</span>
<span class="p">}</span>
<span class="nx">fmt</span><span class="p">.</span><span class="nf">Println</span><span class="p">(</span><span class="nx">dog</span><span class="p">)</span>
<span class="p">}</span>
</pre>
</td>
@ -244,7 +265,8 @@ pointers are automatically dereferenced.</p>
</span><span class="go">&amp;{Jon 42}
</span><span class="go">Sean
</span><span class="go">50
</span><span class="go">51</span></pre>
</span><span class="go">51
</span><span class="go">{Rex true}</span></pre>
</td>
</tr>
@ -263,7 +285,7 @@ pointers are automatically dereferenced.</p>
</div>
<script>
var codeLines = [];
codeLines.push('');codeLines.push('package main\u000A');codeLines.push('import \"fmt\"\u000A');codeLines.push('type person struct {\u000A name string\u000A age int\u000A}\u000A');codeLines.push('func newPerson(name string) *person {\u000A');codeLines.push(' p :\u003D person{name: name}\u000A p.age \u003D 42\u000A return \u0026p\u000A}\u000A');codeLines.push('func main() {\u000A');codeLines.push(' fmt.Println(person{\"Bob\", 20})\u000A');codeLines.push(' fmt.Println(person{name: \"Alice\", age: 30})\u000A');codeLines.push(' fmt.Println(person{name: \"Fred\"})\u000A');codeLines.push(' fmt.Println(\u0026person{name: \"Ann\", age: 40})\u000A');codeLines.push(' fmt.Println(newPerson(\"Jon\"))\u000A');codeLines.push(' s :\u003D person{name: \"Sean\", age: 50}\u000A fmt.Println(s.name)\u000A');codeLines.push(' sp :\u003D \u0026s\u000A fmt.Println(sp.age)\u000A');codeLines.push(' sp.age \u003D 51\u000A fmt.Println(sp.age)\u000A}\u000A');codeLines.push('');
codeLines.push('');codeLines.push('package main\u000A');codeLines.push('import \"fmt\"\u000A');codeLines.push('type person struct {\u000A name string\u000A age int\u000A}\u000A');codeLines.push('func newPerson(name string) *person {\u000A');codeLines.push(' p :\u003D person{name: name}\u000A p.age \u003D 42\u000A return \u0026p\u000A}\u000A');codeLines.push('func main() {\u000A');codeLines.push(' fmt.Println(person{\"Bob\", 20})\u000A');codeLines.push(' fmt.Println(person{name: \"Alice\", age: 30})\u000A');codeLines.push(' fmt.Println(person{name: \"Fred\"})\u000A');codeLines.push(' fmt.Println(\u0026person{name: \"Ann\", age: 40})\u000A');codeLines.push(' fmt.Println(newPerson(\"Jon\"))\u000A');codeLines.push(' s :\u003D person{name: \"Sean\", age: 50}\u000A fmt.Println(s.name)\u000A');codeLines.push(' sp :\u003D \u0026s\u000A fmt.Println(sp.age)\u000A');codeLines.push(' sp.age \u003D 51\u000A fmt.Println(sp.age)\u000A');codeLines.push(' dog :\u003D struct {\u000A name string\u000A isGood bool\u000A }{\u000A \"Rex\",\u000A true,\u000A }\u000A fmt.Println(dog)\u000A}\u000A');codeLines.push('');
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