> But, I am not quite confident about the above reasoning. Am I wrong or not? ISO/IEC WG21 (Working Draft, Standard for Programming Language C++) N4582: [quote] 10.2 Member name lookup [class.member.lookup] 4 If C contains a declaration of the name f, the declaration set contains every declaration of f declared in C that satisfies the requirements of the language construct in which the lookup occurs. [ Note: (... omitted ...) —end note ] If the resulting declaration set is not empty, the subobject set contains C itself, and calculation is complete. [/quote] The name lookup stops as soon as the compiler finds 'basic_stringbuf<charT,traits,Allocator>* rdbuf() const' of basic_istringstream. This is commonly known as 'name hiding'. The name 'rdbuf' of ios_base is effectively hidden by that of basic_istringstream. Your question is about C++ itself rather than GCC so I don't think they belong here. :> ------------------ Best regards, lh_mouse 2016-05-06
