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Gcc Error Specialization After Instantiation


Comment 9 Douglas Gregor 2010-03-08 09:22:55 CST (In reply to comment #8) > I was trying to test this yesterday but bootstrap was broken (likely the issue > with debug emission Looks like a safe bet. share|improve this answer edited Sep 23 '13 at 13:04 answered Sep 18 '13 at 13:27 wpzdm 2317 add a comment| up vote 0 down vote I know this question is quite An explicit specialization cannot be a friend declaration.

I expect it to produce a warning or error. I don't see any reason to defer the vtable for classes that are not instantiations of templates, e.g., when the template specialization kind of the class is TSK_Undeclared or TSK_ExplicitSpecialization, we It is possible but unlikely we are being a bit too aggressive *) Delay codegen of the vtable so that we can delay the instantiation again. 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;


How to start building a regression model when the most strongly associated predictor is binary How to compose flowering plants? What's the point of requiring specific inexpensive material components? I expect it to produce a warning or error. For example, gcc will accept template class foo { virtual void zed(); virtual void bar(); }; template void foo::zed() {} // template // void foo::bar()

With the current semantics the following is invalid: template struct X { virtual void foo(); virtual void bar(); virtual void baz(); }; template void X::foo() {} template Was there a dual-core PowerMac G5? 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 Comment 1 Nikolka 2012-03-20 07:34:03 UTC G++ issues the same diagnostic message for the following example: template class base {}; class derived : public base { // error: specialization of 'base'

The attached patch is similar to the previous but tries to emit vtables early when it can. Extern Template Class 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 Join them; it only takes a minute: Sign up Specialization of member function template after instantiation error, and order of member functions up vote 9 down vote favorite 2 The following 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 | [?]

Can creatures non-native to the prime material plane become undead? How do I approach this? Comment 4 Rafael Ávila de Espíndola 2010-03-04 15:41:31 CST Two things I think we can try to do *) Check if in this particular testcase we really need to instantiate. What is this device on the nose of a Bombardier Global 6000?

Extern Template Class

Cracking in progress What is the meaning of the abbreviations “h.e.” and “h.l.”? share|improve this answer answered Nov 28 '12 at 2:43 bobobobo 27.8k32185247 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign C2908 did not work. Template Specialization Is there such thing as a "Black Box" that decrypts internet traffic?

Comment 11 Rafael Ávila de Espíndola 2010-03-08 23:08:44 CST Created attachment 4437 [details] patch The previous patch passed bootstrap with --enable-optimized. You might be better off just writing a name function for the specific type you want to "specialize" for: std::string name(const Outer::Inner&); share|improve this answer answered Jul 17 '12 at 5:28 share|improve this answer answered Mar 4 at 17:05 sheltond 819411 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up Here I get error: specialization of '...' after instantiation How can I solve this problem?

A question about subsets of plane A limit without invoking L'Hopital. Comment 10 Rafael Ávila de Espíndola 2010-03-08 21:53:16 CST Created attachment 4435 [details] patch Updated patch. Browse other questions tagged c++ templates template-specialization or ask your own question. share|improve this answer answered Jan 14 '14 at 11:28 Mike Seymour 190k12258459 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google

up vote 2 down vote favorite Here is the simplified problem. You'll need at least a declaration of the explicit specialisation to prevent that. Why is this the case, considering that the specialization of bar appears after the generic version in the following lite version of the above code The second example differs by not

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The limitations of when template parameters have to be complete types is generally dependent on the template contents; but it is not illegal to instantiate a template with an incomplete type 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! Besides specific evolutions, which benefits are there for making my Pokemon happy? Noise in op amp design or EMI?

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. 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 Who lost to Glass Joe? Shortest code to throw SIGILL How to return array with true/false values comparing 2 arrays?

Not the answer you're looking for? Description Daniel Krügler 2012-03-19 20:11:21 UTC gcc 4.8.0 20120318 (experimental) rejects the following code: //----- template class base {}; class derived : public base { template friend class base; // Error asked 2 years ago viewed 1039 times Linked 12 Explicit specialization after instantiation Related 1template specialization for CPPUnit isn't being used1Explicit Specialization in C++12Explicit specialization after instantiation3Explicit template specialization1Explicit Template Function A limit without invoking L'Hopital.

Join them; it only takes a minute: Sign up g++ error: specialization after instantiation (template class as friend) up vote 4 down vote favorite Consider the following C++ code: template

Asking help about a typedef expression How do you prove that mirrors aren't parallel universes? Soldier mentioned in War Dogs Leisure and Entertainment Fired because your skills are too far above your coworkers Should I list "boredom" as a reason for leaving my previous job in 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 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

Doug, please open a new bug with the "extern template" issue and assign it to me if you want. I found that if I moved my specialization code to immediately after including , it worked fine. What do you call someone who acts "cool-headed"? Stroustrupmentions it's an error (The C++ programming language, p343) butdoesn't say whether the standard says so or whether it'simplementation defined.Both GCC and MSVC return "4 4 40", showing they instantiated thetemplate

Asking help about a typedef expression Json2Apex implementation issue I rolled a 20 on a stealth check. Works in clang. –user2079303 Sep 28 '15 at 9:07 add a comment| 1 Answer 1 active oldest votes up vote 2 down vote accepted This is GCC bug #52625. Comment 19 Rafael Ávila de Espíndola 2010-03-09 19:24:35 CST Created attachment 4457 [details] patch The attached patch handles only implicit instatiations. since the first instantiation of A