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From: "pavel.kral at omsquare dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/63732] New: constexpr is not constant expression, when cast member data pointer to data parent type Date: Tue, 04 Nov 2014 09:37:00 -0000 [thread overview] Message-ID: <bug-63732-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63732 Bug ID: 63732 Summary: constexpr is not constant expression, when cast member data pointer to data parent type Product: gcc Version: 4.9.2 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: pavel.kral at omsquare dot com The code bellow returns error on 4.9.2 (and cause ICE on 4.8.x) tested on Linux, MinGW and arm-none-eabi. While 'xxx' compiles just fine, 'yyy' which is casted to parent type doesn't. Just for clarification static const array 'm_members' compiles fine and generate values at compile time in .rodata section as expected (arm-none-eabi). class PropertyBase {}; class Number : PropertyBase {}; class ComplexProperty : PropertyBase { public: Number m_firstNumber; static PropertyBase ComplexProperty::* const m_members[]; // compiles fine static constexpr auto xxx = (Number ComplexProperty::*)&ComplexProperty::m_firstNumber; // error: '(PropertyBase ComplexProperty::*)&ComplexProperty::m_firstNumber' is not a constant expression static constexpr auto yyy = (PropertyBase ComplexProperty::*)&ComplexProperty::m_firstNumber; }; // compiles fine PropertyBase ComplexProperty::* const ComplexProperty::m_members[] = { (PropertyBase ComplexProperty::*) &ComplexProperty::m_firstNumber }; static ComplexProperty person; int main() { }
next reply other threads:[~2014-11-04 9:37 UTC|newest] Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top 2014-11-04 9:37 pavel.kral at omsquare dot com [this message] 2014-11-04 20:44 ` [Bug c++/63732] " daniel.kruegler at googlemail dot com 2014-11-04 21:37 ` pavel.kral at omsquare dot com
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