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From: "forestshade at hotmail dot de" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/58449] New: templated cast operator and failed template deduction on copy-construction via assign operator Date: Tue, 17 Sep 2013 18:39:00 -0000 [thread overview] Message-ID: <bug-58449-4@http.gcc.gnu.org/bugzilla/> (raw) http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58449 Bug ID: 58449 Summary: templated cast operator and failed template deduction on copy-construction via assign operator Product: gcc Version: 4.8.1 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: forestshade at hotmail dot de The following code produces a compiler error: ------------------------- #include <iostream> using namespace std; struct S { }; class A { public: A(void* ptr) : ptr(ptr) {} void* ptr; template<typename T> operator const T&() const { return *static_cast<T*>(ptr); } }; int main() { S test; A a(&test); S s = a; return 0; } ------------------------- while this one doesn't: ------------------------- #include <iostream> using namespace std; struct S { }; class A { public: A(void* ptr) : ptr(ptr) {} void* ptr; operator const S&() const { return *static_cast<S*>(ptr); } }; int main() { S test; A a(&test); S s = a; return 0; } ------------------------- I'm not exactly sure if the standard allows the line "S s = a;" in this case but the code above should either both succeed or both fail.
next reply other threads:[~2013-09-17 18:39 UTC|newest] Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top 2013-09-17 18:39 forestshade at hotmail dot de [this message] 2013-09-17 23:03 ` [Bug c++/58449] templated cast operator and failed template deduction on copy initialization redi at gcc dot gnu.org 2020-11-03 6:27 ` gcc-im5revto at tobiasrenger dot name
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