[Bug c++/9048] Conditional expression error with static const members

[Bug c++/9048] Conditional expression error with static const members

[hull at paracel dot com]

------- Additional Comments From hull at paracel dot com  2004-03-18 23:35 -------
I just ran into this bug.

By my reading of the C++ standard, I do not believe that an out-of-definition
should be necessary for a "static const int" class variable.  See Section
9.4.2 "Static data members", specifically paragraph 4.

It is true that the bug can be worked around by turning the conditional
expression "a = (c ? X : Y)" into "if (c) { a = X; } else { a = Y; }".

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=9048

[Bug c++/9048] Conditional expression error with static const members

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-03-19 01:29 -------
No that says it can be optimized away but you still need it, anyways the optimization was added for 
3.4.0 of gcc.

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=9048

[Bug c++/9048] Conditional expression error with static const members

[hull at paracel dot com]

------- Additional Comments From hull at paracel dot com  2004-03-19 19:51 -------
I now understand why it isn't a bug.

Even though class foo says

  class foo {
      static const int bar1 = 1, bar2 = 2;
      ...
  };

it is also necessary to write

  const int foo::bar1, foo::bar2;

This is what Nathan Sidwell's comment was saying, but I didn't
understand it.  This means that "static const int" is not quite
the complete replacement for "#define" that I misunderstood it
to be because it's not a header-only solution.

Thank you for your patience.



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=9048