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pastojs: docs: typecast int(int)

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git-svn-id: trunk@38843 -
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Mattias Gaertner 2018-04-25 13:37:39 +00:00
parent 80b008b76d
commit 0fd731efc5
1 changed files with 13 additions and 3 deletions
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utils/pas2js/docs/translation.html
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@ -488,9 +488,19 @@ function(){
<li>Type casting an <i>integer</i> to <i>boolean</i>, gives <i>false</i> for <i>0</i> and <i>true</i> otherwise.</li>
<li>A <b>char</b> is translated to a JS string, because JS lacks a native char type.</li>
<li>A <b>char</b> is a single JS char code. An UTF-16 codepoint can contain one or two <b>char</b>.</li>
<li>Integers overflows at runtime differ from Delphi/FPC, due to the double format.
For example adding <i>var i: byte = 200; ... i:=i+100;</i> will result in
<i>i=300</i> instead of <i>i=44</i> as in Delphi/FPC.</li>
<li><b>Integers overflows</b> at runtime differ from Delphi/FPC, due to the double format.
For example adding <i>var i: byte = 200; ... i:=i+100;</i> will result in
<i>i=300</i> instead of <i>i=44</i> as in Delphi/FPC.
When range checking <i>{$R+}</i> is enabled <i>i=300</i> will raise an ERangeError.</li>
<li><b>type cast integer to integer</b>, e.g. <i>byte(aLongInt)</i>
<ul>
<li>with range checking enabled: error if outside range</li>
<li>without range checking: emulates the FPC/Delphi behaviour:
e.g. <i>byte(value)</i> translates to <i>value &amp; 0xff</i>,
<i>shortint(value)</i> translates to <i>value &amp; 0xff &lt;&lt;24 &gt;&gt; 24.</i></li>
</ul>
</li>
<li>The <b>mod-operator</b> works 32-bit signed in JS.</li>
</ul>
</div>