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Gcc Error Specialization After Instantiation

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Comment 21 Rafael Ávila de Espíndola 2010-03-09 20:23:30 CST I am closing this bug as the original testcase has been fixed. Will try to reduced the bootstrap failure a bit. You could have dedicated .h and .cpp files for it if it is needed in many places (you can also use inline to put the definition in the .h) –juanchopanza Jul Join them; it only takes a minute: Sign up Explicit specialization after instantiation error up vote 2 down vote favorite I have a template class name Vec3.

If the primary template has a exception specification that isn't noexcept(false), the explicit specializations must have a compatible exception specification. [edit] Members of specializations When defining a member of an explicitly For example, gcc will accept template class foo { virtual void zed(); virtual void bar(); }; template void foo::zed() {} // template // void foo::bar() class Outer { class Inner { }; class Container : public ::Container // This causes also an implicit // specialization of f::name { }; }; How can I specialize template http://stackoverflow.com/questions/21112148/specialization-of-member-function-template-after-instantiation-error-and-order

C2908

struct Hash_inner; class Inner { int i; friend struct Hash_inner; }; struct Hash_inner { size_t operator()(const Inner& in) const { return std::hash()(in.i); } }; std::unordered_map um; }; And I'm Both GCC and MSVC return "4 4 40", showing they instantiated the template at the first oppurtunity and cached the instantiation. #include template struct A { T o; Is it mandatory to define transitions on every possible alphabet in Deterministic Finite Automata? I expect it to produce a warning or error.

Not the answer you're looking for? Providing a "function prototype" (which is just the template specialization header followed by a semicolon, just like a regular function prototype) fixed the problem. Is it required to use brackets inside an integral? College professor builds a tesseract Who lost to Glass Joe?

How Long Does Fact Take To Become Legend (Medieval Setting) Are room temperature superconductors theoretically possible, and through what mechanism? pointers and references to it may be used) template T> class X; // primary template template<> class X; // specialization (declared, not defined) X* p; // OK: pointer to incomplete type n3376 14.7.3/6 If a template, a member template or a member of a class template is explicitly specialized then that specialization shall be declared before the first use of that specialization http://stackoverflow.com/questions/7774188/explicit-specialization-after-instantiation up vote 2 down vote favorite Here is the simplified problem.

It is always in the scope of that namespace: namespace N { template class X { /*...*/ }; // primary template template<> class X { /*...*/ }; // specialization in Comment 13 Rafael Ávila de Espíndola 2010-03-09 13:33:25 CST Created attachment 4453 [details] patch with review comments implemented Comment 14 Rafael Ávila de Espíndola 2010-03-09 14:26:37 CST Created attachment 4455 [details] The mere fact that the code requested an implicit instantiation for specialization DoSomething > before you explicitly provided that specialization is enough for the program to become ill-formed (without a diagnostic How to start building a regression model when the most strongly associated predictor is binary How to compose flowering plants?

Extern Template Class

Shortest code to throw SIGILL How to return array with true/false values comparing 2 arrays? http://stackoverflow.com/questions/20783760/explicit-specialization-after-instantiation-error Why do we use the electron volt? C2908 The test case is meant to produce warnings, since we warn about specializations after explicit instantiations, but we still want it to behave well. Template Specialization The suggestion by Puppy to separate the declaration of the specialization from the implementation allows you to move the declarations very close to the inclusion of , the implementation can come

There is no place, for the same reason as the template case. –Martin Drozdik Jul 17 '12 at 6:05 You can declare it wherever it is needed, and define Privacy policy About cppreference.com Disclaimers GCC Bugzilla – Bug52625 Incorrect specialization semantics of friend class template declaration Last modified: 2015-03-27 18:21:58 UTC Home | New | Browse | Search | [?] Jun 27 '07 #4 P: n/a Kai-Uwe Bux Colander wrote: On Jun 27, 2:52 pm, "[email protected]" The following program produces no warnings, no errors, but doesn't dowhat I expect it Here I get error: specialization of '...' after instantiation How can I solve this problem?

What is the meaning of the abbreviations “h.e.” and “h.l.”? It's quick & easy. so, how to fix it? Browse other questions tagged c++ templates template-specialization or ask your own question.

more hot questions question feed lang-cpp about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation I expect it to produce a warning or error. The error is: error: specialization of ‘Singleton’ after instantiation template friend class Singleton; Is there any way to fix it?

someone has used it between the point that it was defined and the point where you're attempting to specialize it.

more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed I got a paper to review from a journal that had rejected my earlier works, how to respond? The definition can be provided elsewhere. –Charles Bailey Oct 14 '11 at 22:51 1 @Nawaz What I wrote causes an implicit instantiation. Single adjective meaning "does not use much energy" How to start building a regression model when the most strongly associated predictor is binary Speed of vehicles built by humanoid giants Site

In Fantastic Beasts And Where To Find Them, why are portkeys not used for long-distance travel? Sorry, it is not a warning, it is an error: ../PR6474.cpp:46:27: error: explicit specialization of 'bar' after instantiation template <> void X::bar() {} ^ ../PR6474.cpp:44:23: note: explicit instantiation first required here Why would a crash landed generation fall back to the stone age? Unfortunately trunk bootstrap is still broken so it is hard to test this.

c++ templates template-specialization share|improve this question asked Dec 26 '13 at 11:08 xfxsworld 1087 1 Maybe this was answered here: stackoverflow.com/questions/7774188/… –kazemakase Dec 26 '13 at 11:17 1 Did It seems that the problem remains. more hot questions question feed lang-cpp about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation The test case is meant to > produce warnings, since we warn about specializations after explicit > instantiations, but we still want it to behave well. > > Please commit!

How Long Does Fact Take To Become Legend (Medieval Setting) more hot questions question feed lang-cpp about us tour help blog chat data legal privacy policy work here advertising info mobile internal struct union { struct { T x, y, z; }; T _m[3]; }; static const Vec3_T ZERO; }; Vec3.cpp template<> const Vec3_T Vec3_T::ZERO( 0.f, 0.f, 0.f ); When I use In an explicit specialization for such a member, there's a template<> for every enclosing class template that is explicitly specialized. Why would a language be undubbable by universal (machine) translator?

In other words you didn't give the compiler a heads up that "hey, there is going to be a specialization for this specific type of the function, so don't plug in more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed A book called "The Zone" What is so bad about puns? I rolled a 20 on a stealth check.

What do you call someone who acts "cool-headed"? Right now it is in CGVtableInfo, but it might be better to keep it in CodeGenModule next to the DeferredDeclsToEmit *) Should we defer the vtable of every class? There is some text describing this in the "in detail" section of this document: Specialization must be declared before the first use that would cause implicit instantiation In my case, the and why doesn't the compiler treat it as unresolved symbol, while the linker does?

The only way to approach your problem is to define the specialization before the class, but to define the actual member function operator() after the class. Meta-undecidability Reasons for an academic to need administrator rights on work computer What's the point of requiring specific inexpensive material components? A question about subsets of plane Why do some items survive time travelling in Majora's Mask? Brian Jun 27 '07 #6 This discussion thread is closed Start new discussion Replies have been disabled for this discussion.

Browse other questions tagged c++ templates instantiation specialization or ask your own question. I found that if I moved my specialization code to immediately after including , it worked fine.