[Bug c++/105511] [12/13 Regression] Spurious warning: "expected 'template' keyword..." when lt and gt compare over ternary

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105511

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |mpolacek at gcc dot gnu.org

--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
I'm not sure if there's anything to fix; the manual says:

In rare cases it is possible to get false positives. To silence this, wrap
the expression in parentheses. For example, the following is treated as a
template, even where m and N are integers:

@smallexample
void NotATemplate (my_class t)
@{
  int N = 5;

  bool test = t.m < N > (0); // Treated as a template.
  test = (t.m < N) > (0); // Same meaning, but not treated as a template.
@}
@end smallexample

so

return ascending ? (a.value < (*b).value) : a.value > (*b).value;

prevents the warning.