This is an unofficial snapshot of the ISO/IEC JTC1 SC22 WG21 Core Issues List revision 118e. See http://www.open-std.org/jtc1/sc22/wg21/ for the official list.
2025年11月05日
[Voted into WP at October 2005 meeting.]
7.6.4 [expr.mptr.oper] paragraph 5 contains the following example:
struct S {
mutable int i;
};
const S cs;
int S::* pm = &S::i; // pm refers to mutable member S::i
cs.*pm = 88; // ill-formed: cs is a const object
The const object cs is not explicitly initialized, and class S does not have a user-declared default constructor. This makes the code ill-formed as per 9.5 [dcl.init] paragraph 9.
Proposed resolution (April, 2005):
Change the example in 7.6.4 [expr.mptr.oper] paragraph 5 to read as follows:
struct S {
(追記) S() : i(0) { } (追記ここまで)
mutable int i;
};
(追記) void f()
{ (追記ここまで)
const S cs;
int S::* pm = &S::i; // pm refers to mutable member S::i
cs.*pm = 88; // ill-formed: cs is a const object
(追記) } (追記ここまで)