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From: "fchelnokov at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/110463] New: Mutable subobject is usable in a constant expression
Date: Wed, 28 Jun 2023 17:15:51 +0000 [thread overview]
Message-ID: <bug-110463-4@http.gcc.gnu.org/bugzilla/> (raw)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110463
Bug ID: 110463
Summary: Mutable subobject is usable in a constant expression
Product: gcc
Version: 13.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: fchelnokov at gmail dot com
Target Milestone: ---
The following program is invalid per
https://timsong-cpp.github.io/cppwp/n4861/expr.const#4.8 (An object or
reference is usable in constant expressions if it is ... a non-mutable
subobject)
struct U {
mutable int x = 2;
};
int main() {
constexpr U u{};
u.x = 1;
static_assert( u.x == 2 ); // must fail, but ok in GCC
}
but GCC accepts it. Online demo: https://gcc.godbolt.org/z/n8MYzhbad
next reply other threads:[~2023-06-28 17:15 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-28 17:15 fchelnokov at gmail dot com [this message]
2023-06-28 17:29 ` [Bug c++/110463] [13/14 Regression] " ppalka at gcc dot gnu.org
2023-06-29 20:10 ` cvs-commit at gcc dot gnu.org
2023-07-01 1:28 ` cvs-commit at gcc dot gnu.org
2023-07-01 1:29 ` ppalka at gcc dot gnu.org
2023-07-01 18:06 ` fchelnokov at gmail dot com
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