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QL code and tests for C#/C++/JavaScript.

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Pavel Avgustinov
2018-08-02 17:53:23 +01:00
commit b55526aa58
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javascript/ql/src/Statements/UnreachableStatement.qhelp Normal file
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<!DOCTYPE qhelp PUBLIC
"-//Semmle//qhelp//EN"
"qhelp.dtd">
<qhelp>
<overview>
<p>
An unreachable statement almost always indicates missing code or a latent bug and should be examined
carefully.
</p>
</overview>
<recommendation>
<p>
Examine the surrounding code to determine why the statement has become unreachable. If it is no
longer needed, remove the statement.
</p>
</recommendation>
<example>
<p>
In the following example, a spurious semicolon after the <code>if</code> condition at line 2 makes
the <code>return</code> statement on line 4 unreachable: the function will always execute the
<code>return</code> statement on line 3 first, so it will never reach line 4.
</p>
<sample src="examples/UnreachableStatement.js" />
<p>
To correct this issue, remove the spurious semicolon:
</p>
<sample src="examples/UnreachableStatementGood.js" />
</example>
<references>
<li>Wikipedia: <a href="http://en.wikipedia.org/wiki/Unreachable_code">Unreachable code</a>.</li>
</references>
</qhelp>