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POFunction Pointers in C++/CX
 

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  1. POFunction Pointers in C++/CX
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    <p><strong>Background</strong></p> <p>I'm writing a Windows Store App in C++ using the Windows Store Unit Test Project. While trying to figure out how to test that an exception was raised, I found Assert::ExpectedException in CppUnitTestAssert.h. Its signatures are below:</p> <pre><code>template&lt;typename _EXPECTEDEXCEPTION, typename _RETURNTYPE&gt; static void ExpectException(_RETURNTYPE (*func)(), const wchar_t* message = NULL, const __LineInfo* pLineInfo = NULL) { ... } </code></pre> <p>and</p> <pre><code>template&lt;typename _EXPECTEDEXCEPTION, typename _FUNCTOR&gt; static void ExpectException(_FUNCTOR functor, const wchar_t* message = NULL, const __LineInfo* pLineInfo = NULL)` { ... } </code></pre> <p><strong>The Question Is:</strong></p> <p>It's been a LONG time since I coded in C++, so I'm having difficulty figuring out how to call the method correctly. I keep getting the following error:</p> <pre><code>'Microsoft::VisualStudio::CppUnitTestFramework::Assert::ExpectException' : none of the 2 overloads could convert all the argument types </code></pre> <p>I realize this may be actually be a misunderstanding of "pure" C++, but I'm not sure if C++/CX may have different rules for using function pointers that C++. Or at least what I remember the rules to be.</p> <p>EDIT: </p> <p>I'm attempting to use the function pointer overload, _RETURNTYPE (*func)(), not the __FUNCTOR overload. Here is the code that is failing to compile. </p> <pre><code>Assert::ExpectException&lt;InvalidArgumentException, int&gt;(&amp;TestClass::TestMethod); </code></pre> <p>Here is TestMethod:</p> <pre><code>void TestMethod() { } </code></pre>
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    1. USbasilard99
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    1. CO...What are you trying to pass as a _FUNCTOR?
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      1. USJames McNellis
    2. COYeah, that would probably have helped, wouldn't it?
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      1. USbasilard99
    3. COI think you might be better off trying the _FUNCTOR version. It seems to me that the first overload would match a global function, not a member function as you're trying to use... or just try using a global function to test).
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      1. POFunction Pointers in C++/CX
      1. USLuis
 

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