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<?xml version='1.0'?>
<html xmlns='http://www.w3.org/1999/xhtml'
      xmlns:math='http://www.w3.org/1998/Math/MathML'
>
<head>
<title>Replacing The CppAD Error Handler: Example and Test</title>
<meta http-equiv='Content-Type' content='text/html' charset='utf-8'/>
<meta name="description" id="description" content="Replacing The CppAD Error Handler: Example and Test"/>
<meta name="keywords" id="keywords" content=" replacing the cppad error handler: example and test handler "/>
<style type='text/css'>
body { color : black }
body { background-color : white }
A:link { color : blue }
A:visited { color : purple }
A:active { color : purple }
</style>
<script type='text/javascript' language='JavaScript' src='_error_handler.cpp_xml.js'>
</script>
</head>
<body>
<table><tr>
<td>
<a href="http://www.coin-or.org/CppAD/" target="_top"><img border="0" src="_image.gif"/></a>
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<option>ErrorHandler-&gt;</option>
<option>error_handler.cpp</option>
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</select>
</td>
<td>error_handler.cpp</td>
<td>Headings</td>
</tr></table><br/>



<center><b><big><big>Replacing The CppAD Error Handler: Example and Test</big></big></b></center>
<code><font color="blue"><pre style='display:inline'> 

# include &lt;cppad/error_handler.hpp&gt;
# include &lt;cstring&gt;

namespace {
	void myhandler(
		bool known       ,
		int  line        ,
		const char *file ,
		const char *exp  ,
		const char *msg  )
	{	// error handler must not return, so throw an exception
		throw line;
	}
}


bool ErrorHandler(void)
{	using CppAD::ErrorHandler;

	int lineMinusFive = 0;

	// replace the default CppAD error handler
	ErrorHandler info(myhandler);

	// set ok to false unless catch block is executed
	bool ok = false;

	// use try / catch because handler throws an exception
	try {
		// set the static variable Line to next source code line
		lineMinusFive = __LINE__;
 
		// can call myhandler anywhere that ErrorHandler is defined
		ErrorHandler::Call(
			true     , // reason for the error is known
			__LINE__ , // current source code line number
			__FILE__ , // current source code file name
			&quot;1 &gt; 0&quot;  , // an intentional error condition
			&quot;Testing ErrorHandler&quot;     // reason for error
		); 
	}
	catch ( int line )
	{	// check value of the line number that was passed to handler
		ok = (line == lineMinusFive + 5);
	}

	// info drops out of scope and the default CppAD error handler
	// is restored when this routine returns.
	return ok;
}

</pre>

</font></code>


<hr/>Input File: example/error_handler.cpp

</body>
</html>