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.

2025-11-05

497. Missing required initialization in example

[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 { S() : i(0) { } mutable int i; }; void f() { 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 }