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From: Gabriel Dos Reis <gdr@codesourcery.com> To: nobody@gcc.gnu.org Cc: gcc-prs@gcc.gnu.org, Subject: Re: c++/7000: Compiler not picking up inherited function from base-class Date: Tue, 11 Jun 2002 14:46:00 -0000 [thread overview] Message-ID: <20020611214607.21946.qmail@sources.redhat.com> (raw) The following reply was made to PR c++/7000; it has been noted by GNATS. From: Gabriel Dos Reis <gdr@codesourcery.com> To: f_ker@yahoo.co.uk Cc: gcc-gnats@gcc.gnu.org Subject: Re: c++/7000: Compiler not picking up inherited function from base-class Date: 11 Jun 2002 23:39:37 +0200 f_ker@yahoo.co.uk writes: [...] | I am trying to use a generic base class to supply an operator()(T*) for all classes that have an operator()(T&) - but the compiler doesn't seem to pick up the operator()(T*) from the base class, and complains and rejects the code that tried to call it. This is not a compiler misbehaviour, not a standard-conformant one. The declarations of operator()(T&) are overriding the corresponding pure virtual function in the base case _and_ *hiding* any other overloads. The moral is that you don't want to overload a pure virtual function. | Code: | | #include <vector> | #include <algorithm> | | template<typename RefToPtrFObjConvertor_T_> | class RefToPtrFObjConvertor | { | public: | virtual void | operator()(RefToPtrFObjConvertor_T_& arg) = 0; | | virtual void | operator()(RefToPtrFObjConvertor_T_* arg) | { | operator()(*arg); | } | | }; | | struct Vertex | { | bool is_transformed; | | class SetIsTransformedFlag | : public RefToPtrFObjConvertor<Vertex> | { | public: | bool value; | | SetIsTransformedFlag(bool arg) | : value(arg) | { | } | | void | operator()(Vertex& v) This declaration hides RefToPtrFObjConvertor<Vertex>::operator()(Vertex*). Hence the error message (perhaps cryptic). -- Gaby
next reply other threads:[~2002-06-11 21:46 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2002-06-11 14:46 Gabriel Dos Reis [this message] -- strict thread matches above, loose matches on Subject: below -- 2002-06-17 7:22 lerdsuwa 2002-06-11 14:56 F ker 2002-06-11 14:26 f_ker
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