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<a class="link" href="appendix-i-keywords.html">Appendix I: Keywords</a>
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<main>
<h1 class="main">References</h1>
<div class="language-v">struct Foo {}
fn (foo Foo) bar_method() {
// ...
}
fn bar_function(foo Foo) {
// ...
}
</div>
<p>If a function argument is immutable (like <code>foo</code> in the examples above)
V can pass it either by value or by reference. The compiler will decide,
and the developer doesn't need to think about it.</p>
<p>You no longer need to remember whether you should pass the struct by value
or by reference.</p>
<p>You can ensure that the struct is always passed by reference by
adding <code>&</code>:</p>
<div class="language-v">struct Foo {
abc int
}
fn (foo &Foo) bar() {
println(foo.abc)
}
</div>
<p><code>foo</code> is still immutable and can't be changed. For that,
<code>(mut foo Foo)</code> must be used.</p>
<p>In general, V's references are similar to Go pointers and C++ references.
For example, a generic tree structure definition would look like this:</p>
<div class="language-v">struct Node[T] {
val T
left &Node[T]
right &Node[T]
}
</div>
<p>To dereference a reference, use the <code>*</code> operator, just like in C.</p>
</main>
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<time datetime="2024-09-27T15:56:09.426Z">Last updated:
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