Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/g++.dg/cpp0x/constexpr-ref12.C @ 145:1830386684a0
gcc-9.2.0
author | anatofuz |
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date | Thu, 13 Feb 2020 11:34:05 +0900 |
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// PR c++/66477 // { dg-do compile { target c++11 } } struct a { constexpr bool g() const { return true; } }; constexpr bool g(a&) { return true;} constexpr bool h(a) { return true;} a a1; a& ar = a1; void f(a ap, a& arp) { a a2; a& ar2 = a2; // Most of these are OK because no data is actually loaded. static_assert (a1.g(),""); static_assert (g(a1),""); static_assert (h(a1),""); static_assert (a2.g(),""); static_assert (g(a2),""); static_assert (h(a2),""); static_assert (ap.g(),""); static_assert (g(ap),""); static_assert (h(ap),""); static_assert (ar.g(),""); static_assert (g(ar),""); static_assert (h(ar),""); // But these are specifically prohibited in [expr.const]/4.12: // * an id-expression that refers to a variable or data member of reference // type unless the reference has a preceding initialization and either // ** it is usable in constant expressions or // ** its lifetime began within the evaluation of e; static_assert (ar2.g(),""); // { dg-error "constant" } static_assert (g(ar2),""); // { dg-error "constant" } static_assert (h(ar2),""); // { dg-error "constant" } static_assert (arp.g(),""); // { dg-error "constant" } static_assert (g(arp),""); // { dg-error "constant" } static_assert (h(arp),""); // { dg-error "constant" } }