https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111122
Bug ID: 111122
Summary: local temps from get_nsdmi -> break_out_target_exprs
break constexpr evaluation
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: jakub at gcc dot gnu.org
Target Milestone: ---
struct T {
const char *d = new char[2] { 'o', 'k' };
constexpr int size () const { return 2; }
constexpr const char *data () const { return d; }
constexpr ~T () { delete[] d; }
};
constexpr int a = T{}.size ();
constexpr int b = T{}.data ()[0];
//constexpr const char *c = T{}.data ();
is rejected by g++ with
test42.C:7:29: error: the value of ‘<anonymous>’ is not usable in a constant
expression
7 | constexpr int a = T{}.size ();
| ^
test42.C:7:21: note: ‘<anonymous>’ was not declared ‘constexpr’
7 | constexpr int a = T{}.size ();
| ^
test42.C:8:32: error: the value of ‘<anonymous>’ is not usable in a constant
expression
8 | constexpr int b = T{}.data ()[0];
| ^
test42.C:8:21: note: ‘<anonymous>’ was not declared ‘constexpr’
8 | constexpr int b = T{}.data ()[0];
| ^
during potential_constant_expression_1,
while clang++ accepts it.
