What's the c++ inline class?

Question

I accidentally found that the Clang compiler allows :

inline class AAA
{
};

in C++. What\'s this?

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PS. I reported this to Clang ma

Answer 1

clang shouldn't allow this, inline can only be used in the declaration of functions, from ISO/IEC 14882:2003 7.1.2 [dcl.fct.spec] / 1 :

Function-specifiers can be used only in function declarations.

inline is one of three function-specifiers, virtual and explicit being the others.

As @MatthieuM notes, in the next version of C++ (C++0x), the inline keyword will also be allowed in namespace definitions (with different semantics to inline as a function-specifier).