Abstract type: Difference between revisions
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m (→{{header|Phix}}: added syntax colouring the hard way) |
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You can also have explicitly abstract classes (and/or abstract methods). Needs 0.8.1+ |
You can also have explicitly abstract classes (and/or abstract methods). Needs 0.8.1+ |
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<lang Phix> |
<!--<lang Phix>--> |
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<span style="color: #008080;">abstract</span> <span style="color: #008080;">class</span> <span style="color: #000000;">job</span> |
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integer id |
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<span style="color: #004080;">integer</span> <span style="color: #000000;">id</span> |
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-- procedure test(); -- (the ; makes it an abstract method) |
<span style="color: #000080;font-style:italic;">-- procedure test(); -- (the ; makes it an abstract method)</span> |
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procedure show() |
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<span style="color: #008080;">procedure</span> <span style="color: #000000;">show</span><span style="color: #0000FF;">()</span> |
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printf(1,"this is job:%d\n",id) |
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<span style="color: #7060A8;">printf</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"this is job:%d\n"</span><span style="color: #0000FF;">,</span><span style="color: #000000;">id</span><span style="color: #0000FF;">)</span> |
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end procedure |
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<span style="color: #008080;">end</span> <span style="color: #008080;">procedure</span> |
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end class |
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<span style="color: #008080;">end</span> <span style="color: #008080;">class</span> |
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--job j = new({1}) -- compilation error: "abstract class" |
<span style="color: #000080;font-style:italic;">--job j = new({1}) -- compilation error: "abstract class"</span> |
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class errand extends job |
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<span style="color: #008080;">class</span> <span style="color: #000000;">errand</span> <span style="color: #008080;">extends</span> <span style="color: #000000;">job</span> |
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end class |
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<span style="color: #008080;">end</span> <span style="color: #008080;">class</span> |
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errand e = new({2}) |
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<span style="color: #000000;">errand</span> <span style="color: #000000;">e</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">new</span><span style="color: #0000FF;">({</span><span style="color: #000000;">2</span><span style="color: #0000FF;">})</span> |
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e.show()</lang> |
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<span style="color: #000000;">e</span><span style="color: #0000FF;">.</span><span style="color: #000000;">show</span><span style="color: #0000FF;">()</span> |
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<!--</lang>--> |
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{{out}} |
{{out}} |
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<pre> |
<pre> |
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