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In the following code: template<typename T> struct is_pod { static const bool value = __is_pod(T); }; template <bool, typename = void> struct enable_if {}; template <typename T> struct enable_if<true, T> { typedef T type; }; template <typename T> void bar(typename enable_if<is_pod<T>::value>::type* = 0); int main() { bar<int>(); // ERROR HERE } CDT gives an error at the indicated line: "Invalid arguments 'Candidates are: void bar(enable_if<&0[is_pod<#0>::value],void>::type *)'" I'm assuming the cause of the error is that CDT does not recognize the __is_pod compiler builtin used to implement the is_pod type trait metafunction. What can be done about this? Could CDT support compiler builtins like __is_pod and work out the result of expressions like __is_pod(T) by using the definition of POD (and other traits) in the standard (see section 20.9.4.3)?
Please correct me if I'm wrong, but it seems to me that support for dependent expressions is orthogonal to support for compiler built-ins like __is_pod. CDT doesn't recognize built-ins like __is_pod even when they appear in a non-dependent context, for example: template <bool> struct foo {}; template <> struct foo<true> { typedef int type; }; typedef foo<__is_pod(int)>::type t; // ERROR HERE Should I file a separate bug for this?
Fixed by commit http://git.eclipse.org/c/cdt/org.eclipse.cdt.git/commit/?id=3b7da721b60c53f8f3e5baedeb41542f9d28d0d8.
*** cdt git genie on behalf of Sergey Prigogin *** Bug 367993 - Error due to CDT not recognizing compiler built-ins like __is_pod. [*] http://git.eclipse.org/c/cdt/org.eclipse.cdt.git/commit/?id=3b7da721b60c53f8f3e5baedeb41542f9d28d0d8
*** cdt git genie on behalf of Sergey Prigogin *** Bug 367993 - Error due to CDT not recognizing compiler built-ins like __is_pod. [*] http://git.eclipse.org/c/cdt/org.eclipse.cdt.git/commit/?id=fd7b8220ee5865c8d262dc4872d18d770ed89e9a
