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// Build don't link: // GROUPS passed conversions // cvt file // Message-Id: <1166.9307131600@ace.eng.cam.ac.uk> // From: ajp@eng.cam.ac.uk // Date: Tue, 13 Jul 93 17:00:44 BST class B {}; class A { public: operator const B*() const { return b; } private: B* b; }; int main() { A a; if (a!=0) { } }