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POreplacing new with macro conflicts with placement new
 

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    <p>I've got a massive application (several million LOC, and tens of thousands of files), and I'm trying to use the debug crt to detect memory leaks. I'm trying to macro-ize new like so:</p> <pre><code>#define _CRTDBG_MAP_ALLOC #include &lt;crtdbg.h&gt; #ifndef NEW_DEBUG #define NEW_DEBUG new(_NORMAL_BLOCK, __FILE__, __LINE__) #define new NEW_DEBUG #endif </code></pre> <p>Now, my app is so big, so for me, ideally, I would put that in a header file and specifically include that in tens of thousands of CPP files. Not a fun task. So I've attempted to place this in a common header file in our SDK, which will get included in every translational unit. </p> <p>The problem I'm running into is it seems to clash with some STL header files, and the compiler emits errors when placement new is used. I can change that in my own code, by using pragma's and disabling the new macro. Not a problem there. It's the STL header files that use placement new, I can't change.</p> <p>I've figured out a <strong>work-around</strong>, by rearranging include directives in cpp files. For example:</p> <pre><code>// doesn't compile #include "new_redirect.h" #include &lt;map&gt; // for instance // does compile #include &lt;map&gt; // for instance #include "new_redirect.h" </code></pre> <p>But this is a difficult work-around because again, I have to go modify thousands of files, and make sure their STL headers are included <strong>before</strong> anything else. The ironic thing, is I created a hello world application to specifically test this problem: And the hello-world app of mine compiled fine. But my massive app doesn't, without this work-around.</p> <p>So my questions are:</p> <ol> <li>Has anyone been able to macro-ize new completely without jiggling massive amounts of code? (In a relatively painless way)</li> <li>Any other way to get around re-arranging my STL header include directives?</li> </ol> <p>Thanks</p>
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    1. COSeen this question http://stackoverflow.com/questions/4301505/compile-errors-when-i-using-crt-memory-leak-detection ?
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    2. CONo I haven't, but after reading it, it feels like the nail in the coffin of my hopes of using this...
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    3. CORedefining `new` is usually a bad idea (tm). Also see [here](http://stackoverflow.com/questions/3202520/) and [here](http://stackoverflow.com/questions/1326656/).
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