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enums.html
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<!DOCTYPE HTML>
<html>
<head>
<title>OpenSPH</title>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no" />
<link rel="stylesheet" href="assets/css/main.css" />
</head>
<body class="is-preload">
<!-- Main -->
<div id="main" style="margin-left:15%;width:70%;max-width: 154em;">
<!-- One -->
<section id="one">
<header class="major">
<h2>Extensible <code>enum class</code></h2>
</header>
<p>
The following example demonstrates this:
<pre><code>enum class Vehicle {
CAR,
BUS,
};
void drive(Vehicle vehicle);
enum class Transport : Vehicle {
SHIP,
PLANE,
};
void travel(Transport transport);
</code></pre>
The enum <code>Transport</code> is then a strict superset.
One can travel using any vehicle, <i>but also</i> by other
means of transport, such as a ship or an airplane.
Of course, this is not a valid C++ code.
<pre><code>template <typename TDerived, typename TBase>
struct IsExtended {
static constexpr bool value = false;
};
</code></pre>
</p>
</section>
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