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POAllocating a std::string with std::vector iterators causes debug errors in one project, but works in another?
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  1. POAllocating a std::string with std::vector iterators causes debug errors in one project, but works in another?
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    copied!<p>I am trying to get the name of an input device, using the RawInput API, but I get a weird error when I allocate the name string.Basically I saw this in another project where it worked perfectly.This is the flawed code:</p> <pre><code>std::string Input::GetDeviceName(void* device) { size_t size; bool result = GetRawInputDeviceInfo(device, RIDI_DEVICENAME, null, &amp;size) ; if(result &lt; 0) { throw RawInputException(GetLastError(), L"GetRawInputDeviceInfo(InputDeviceDataRequest::Name)"); } std::vector&lt;std::string::value_type&gt; data(size); result = GetRawInputDeviceInfo(device, RIDI_DEVICENAME, &amp;data[0], &amp;size); if(result &lt; 0) { throw RawInputException(GetLastError(), L"GetRawInputDeviceInfo(InputDeviceDataRequest::Name)"); } std::string name = std::string(data.cbegin(), data.cend()); return(name); } </code></pre> <p>The same code worked fine in the tutorial implementation i read it from, however when I use it it triggers a breakpoint at <strong>*HeapAlloc(_crtheap, 0, size ? size : 1);*</strong>, somewhere 10 levels down the call stack from <strong>std::string _name = std::string(data.cbegin(), data.cend());</strong>.I checked the value of the vector, it has a size of 61.I think the problem is with the actual contents?But what could go wrong with std::string::value_type?GetRawInputDeviceInfo() returns true, so it successfully filled up the vector with chars.And as I mentioned, the tutorial code where I read it from built and ran perfectly.For those interested, here's a link to the project: <a href="https://code.google.com/p/rawinput/" rel="nofollow">The guy stopped updating it, but its almost fully functional</a></p>
 

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