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<span style="color:#7a7c7d">// Vala Sample File</span>
<span style="color:#7a7c7d">/*</span>
<span style="color:#7a7c7d"> * Multiline comment</span>
<span style="color:#7a7c7d"> * </span><span style="color:#81ca2d;background-color:#4d1f24;font-weight:bold">NOTE</span><span style="color:#7a7c7d"> </span><span style="color:#ca9219;background-color:#451e1a;font-weight:bold">FIXME</span><span style="color:#7a7c7d"> </span><span style="color:#e85848;background-color:#451e1a;font-weight:bold">ALERT</span>
<span style="color:#7a7c7d"> */</span>
<span style="color:#2980b9">void</span> main<span style="color:#3f8058">()</span> <span style="color:#3f8058">{</span>
print<span style="color:#3f8058">(</span><span style="color:#f44f4f">"Hello World</span><span style="color:#3daee9">\n</span><span style="color:#f44f4f">"</span><span style="color:#3f8058">);</span>
<span style="color:#3f8058">}</span>
<span style="color:#7a7c7d">// Example 1</span>
<span style="font-weight:bold">class</span> Sample<span style="color:#3f8058">:</span> Object <span style="color:#3f8058">{</span>
<span style="color:#2980b9">void</span> greeting<span style="color:#3f8058">()</span> <span style="color:#3f8058">{</span>
stdout<span style="color:#3f8058">.</span>printf<span style="color:#3f8058">(</span><span style="color:#f44f4f">"Hello World</span><span style="color:#3daee9">\n</span><span style="color:#f44f4f">"</span><span style="color:#3f8058">);</span>
<span style="color:#3f8058">}</span>
<span style="font-weight:bold">static</span> <span style="color:#2980b9">void</span> main<span style="color:#3f8058">(</span><span style="color:#2980b9">string</span><span style="color:#3f8058">[]</span> args<span style="color:#3f8058">)</span> <span style="color:#3f8058">{</span>
<span style="color:#2980b9">var</span> sample <span style="color:#3f8058">=</span> <span style="font-weight:bold">new</span> Sample<span style="color:#3f8058">();</span>
sample<span style="color:#3f8058">.</span>greeting<span style="color:#3f8058">();</span>
<span style="color:#3f8058">}</span>
<span style="color:#3f8058">}</span>
<span style="color:#7a7c7d">// Example 2</span>
<span style="font-weight:bold">using</span> GLib<span style="color:#3f8058">;</span>
<span style="font-weight:bold">interface</span> Printable <span style="color:#3f8058">{</span>
<span style="font-weight:bold">public</span> <span style="font-weight:bold">abstract</span> <span style="color:#2980b9">string</span> print<span style="color:#3f8058">();</span>
<span style="font-weight:bold">public</span> <span style="font-weight:bold">virtual</span> <span style="color:#2980b9">string</span> pretty_print<span style="color:#3f8058">()</span> <span style="color:#3f8058">{</span>
<span style="font-weight:bold">return</span> <span style="color:#f44f4f">"Please "</span> <span style="color:#3f8058">+</span> print<span style="color:#3f8058">();</span>
<span style="color:#3f8058">}</span>
<span style="color:#3f8058">}</span>
<span style="font-weight:bold">class</span> NormalPrint<span style="color:#3f8058">:</span> Object<span style="color:#3f8058">,</span> Printable <span style="color:#3f8058">{</span>
<span style="color:#2980b9">string</span> print<span style="color:#3f8058">()</span> <span style="color:#3f8058">{</span>
<span style="font-weight:bold">return</span> <span style="color:#f44f4f">"don't forget about me"</span><span style="color:#3f8058">;</span>
<span style="color:#3f8058">}</span>
<span style="color:#3f8058">}</span>
<span style="font-weight:bold">class</span> OverridePrint<span style="color:#3f8058">:</span> Object<span style="color:#3f8058">,</span> Printable <span style="color:#3f8058">{</span>
<span style="color:#2980b9">string</span> print<span style="color:#3f8058">()</span> <span style="color:#3f8058">{</span>
<span style="font-weight:bold">return</span> <span style="color:#f44f4f">"Mind the gap"</span><span style="color:#3f8058">;</span>
<span style="color:#3f8058">}</span>
<span style="font-weight:bold">public</span> <span style="font-weight:bold">override</span> <span style="color:#2980b9">string</span> pretty_print<span style="color:#3f8058">()</span> <span style="color:#3f8058">{</span>
<span style="font-weight:bold">return</span> <span style="color:#f44f4f">"Override"</span><span style="color:#3f8058">;</span>
<span style="color:#3f8058">}</span>
<span style="color:#3f8058">}</span>
<span style="color:#2980b9">void</span> main<span style="color:#3f8058">(</span><span style="color:#2980b9">string</span><span style="color:#3f8058">[]</span> args<span style="color:#3f8058">)</span> <span style="color:#3f8058">{</span>
<span style="color:#2980b9">var</span> normal <span style="color:#3f8058">=</span> <span style="font-weight:bold">new</span> NormalPrint<span style="color:#3f8058">();</span>
<span style="color:#2980b9">var</span> overridden <span style="color:#3f8058">=</span> <span style="font-weight:bold">new</span> OverridePrint<span style="color:#3f8058">();</span>
print<span style="color:#3f8058">(</span>normal<span style="color:#3f8058">.</span>pretty_print<span style="color:#3f8058">());</span>
print<span style="color:#3f8058">(</span>overridden<span style="color:#3f8058">.</span>pretty_print<span style="color:#3f8058">());</span>
<span style="color:#3f8058">}</span>
<span style="color:#7a7c7d">// Example 3</span>
<span style="font-weight:bold">using</span> Gtk<span style="color:#3f8058">;</span>
<span style="color:#2980b9">int</span> main<span style="color:#3f8058">(</span><span style="color:#2980b9">string</span><span style="color:#3f8058">[]</span> args<span style="color:#3f8058">)</span> <span style="color:#3f8058">{</span>
Gtk<span style="color:#3f8058">.</span>init<span style="color:#3f8058">(</span><span style="font-weight:bold">ref</span> args<span style="color:#3f8058">);</span>
<span style="color:#2980b9">var</span> window <span style="color:#3f8058">=</span> <span style="font-weight:bold">new</span> Window<span style="color:#3f8058">();</span>
window<span style="color:#3f8058">.</span>title <span style="color:#3f8058">=</span> <span style="color:#f44f4f">"Hello, World!"</span><span style="color:#3f8058">;</span>
window<span style="color:#3f8058">.</span>border_width <span style="color:#3f8058">=</span> <span style="color:#f67400">10</span><span style="color:#3f8058">;</span>
window<span style="color:#3f8058">.</span>window_position <span style="color:#3f8058">=</span> WindowPosition<span style="color:#3f8058">.</span>CENTER<span style="color:#3f8058">;</span>
window<span style="color:#3f8058">.</span>set_default_size<span style="color:#3f8058">(</span><span style="color:#f67400">350</span><span style="color:#3f8058">,</span> <span style="color:#f67400">70</span><span style="color:#3f8058">);</span>
window<span style="color:#3f8058">.</span>destroy<span style="color:#3f8058">.</span><span style="color:#0099ff;font-weight:bold">connect</span><span style="color:#3f8058">(</span>Gtk<span style="color:#3f8058">.</span>main_quit<span style="color:#3f8058">);</span>
<span style="color:#2980b9">var</span> label <span style="color:#3f8058">=</span> <span style="font-weight:bold">new</span> Label<span style="color:#3f8058">(</span><span style="color:#f44f4f">"Hello, World!"</span><span style="color:#3f8058">);</span>
window<span style="color:#3f8058">.</span>add<span style="color:#3f8058">(</span>label<span style="color:#3f8058">);</span>
window<span style="color:#3f8058">.</span>show_all<span style="color:#3f8058">();</span>
Gtk<span style="color:#3f8058">.</span>main<span style="color:#3f8058">();</span>
<span style="font-weight:bold">return</span> <span style="color:#f67400">0</span><span style="color:#3f8058">;</span>
<span style="color:#3f8058">}</span>
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