Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/g++.dg/cpp1y/constexpr-tracking-const1.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++/91264 // { dg-do compile { target c++14 } } constexpr void mod (int &r) { r = 99; // { dg-error "modifying a const object" } } constexpr int fn1 () { const int i = 0; // { dg-message "originally declared" } mod (const_cast<int &>(i)); // { dg-message "in .constexpr. expansion of " } return i; } constexpr int i1 = fn1 (); // { dg-message "in .constexpr. expansion of " } constexpr int fn2 () { const int i = 5; // { dg-message "originally declared" } const_cast<int &>(i) = 10; // { dg-error "modifying a const object" } return i; } constexpr int i2 = fn2 (); // { dg-message "in .constexpr. expansion of " } constexpr int fn3 () { const int i = 5; // { dg-message "originally declared" } ++const_cast<int &>(i); // { dg-error "modifying a const object" } return i; } constexpr int i3 = fn3 (); // { dg-message "in .constexpr. expansion of " } constexpr int fn4 () { const int i = 5; // { dg-message "originally declared" } const_cast<int &>(i)--; // { dg-error "modifying a const object" } return i; } constexpr int i4 = fn4 (); // { dg-message "in .constexpr. expansion of " } constexpr int fn5 () { const int i = 5; // { dg-message "originally declared" } const_cast<int &>(i) += 2; // { dg-error "modifying a const object" } return i; } constexpr int i5 = fn5 (); // { dg-message "in .constexpr. expansion of " } constexpr int fn6 () { // This is OK. int i = 3; const int *cip = &i; int *ip = const_cast<int *>(cip); *ip = 4; return i; } constexpr int i6 = fn6 (); static_assert(i6 == 4, "");