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<HTML>
<HEAD>
<TITLE>The Test Tools</TITLE>
<LINK rel="stylesheet" type="text/css" href="../../../style/btl.css" media="screen">
<LINK rel="stylesheet" type="text/css" href="../../../style/btl-print.css" media="print">
<META http-equiv="Content-Language" content="en-us">
<META http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<STYLE type="text/css">
H4
{
    margin:     0px;
}
</STYLE>
</HEAD>
<BODY>
<DIV class="body"> 
  <H3>BOOST_MESSAGE( message )</H3>
  <P class="first-line-indented">This tool is used to log the message in the
    test output stream. The message  is logged as  is without any modifications.</P>
  <P class="first-line-indented">The only tool's parameter is a message to log. The message argument can 
    be of any type and can be a result of concatenations using the operator &lt;&lt;().</P>
  <H4>Example: test.cpp</H4>
  <PRE class="code"><SPAN class="reserv-word">struct</SPAN> A {
    <SPAN class="reserv-word">friend</SPAN> <SPAN class="cpp-type">std::ostream</SPAN>&amp; <SPAN class=keyword>operator</SPAN>&lt;&lt;( <SPAN class="cpp-type">std::ostream</SPAN>&amp; str, A <SPAN class="reserv-word">const</SPAN>&amp; a ) {
        str &lt;&lt; <SPAN class="literal">&quot;struct A&quot;</SPAN>;
        
        <SPAN class="reserv-word">return</SPAN> str;
    }
};

<SPAN class="cpp-type">int</SPAN> test_main( <SPAN class="cpp-type">int</SPAN>, <SPAN class="cpp-type">char</SPAN>* [] ) {
    BOOST_MESSAGE( <SPAN class="literal">&quot;Starting test&quot;</SPAN> );

    <SPAN class="cpp-type">int</SPAN> i = <SPAN class="literal">2</SPAN>;
    BOOST_MESSAGE( <SPAN class="literal">&quot;i=&quot;</SPAN> &lt;&lt; i );

    BOOST_MESSAGE( <SPAN class="literal">&quot;still testing...&quot;</SPAN> );

    <SPAN class="reserv-word">struct</SPAN> A a;
    BOOST_MESSAGE( a &lt;&lt; <SPAN class="literal">'.'</SPAN> );

    <SPAN class="reserv-word">return</SPAN> <SPAN class="literal">0</SPAN>;
}</PRE>
  <H4>Output:</H4>
  <P class="test-output">Starting test<BR>
    i=2<BR>
    still testing...<BR>
    struct A.</P>
  <DIV class="see_also"> 
    <H4>See Also</H4>
    <P class="see-also-content"><A href="BOOST_CHECK_MESSAGE.html" target="descr">BOOST_CHECK_MESSAGE</A></P>
  </DIV>
</DIV>
</BODY>
</HTML>
<!-- Copyright Gennadiy Rozental 2001-2005. 
Distributed under the Boost Software License, Version 1.0. 
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