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Re: Concept-check bug ?

Jonathan Wakely wrote:
Hi y'all,

   #define _GLIBCXX_CONCEPT_CHECKS
   #include <vector>

   struct A {
       std::vector<A> v;
   };

This produces concept-check errors because A is incomplete at the
point of declaring v.

Is this code really illegal, or just a flaw in the concept-checks ?

It's illegal (17.4.3.6/2 last bullet), but useful.

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