https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86015
--- Comment #15 from Josh Marshall ---
That is bizarre. Then did I stumble upon the vestiges of elements of the
standard which were partially removed prior to 2003? This may be open for
awhile. I'll start on a proposal for 2020. I'll also hav
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86015
--- Comment #14 from Jonathan Wakely ---
And signed integer types are defined in C++17 6.7.1 [basic.fundamental].
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86015
--- Comment #13 from Jonathan Wakely ---
(In reply to Josh Marshall from comment #11)
> Then please give me a concrete reference.
C++17 27.2.1 [iterator.requirements.general] paragraph 1.
The same requirement also appears in the C++98, C++03, C
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86015
--- Comment #12 from Josh Marshall ---
I can now say why this bothers me from a design perspective. If the
requirement you are giving is correct, then the distance_type template
parameter must always be signed and always describe the distance be
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86015
--- Comment #11 from Josh Marshall ---
Then please give me a concrete reference.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86015
--- Comment #10 from Jonathan Wakely ---
cppreference is not the standard. See comment 5, where I quoted the standard
which requires difference_type to be a signed integer type. This is not a bug.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86015
--- Comment #9 from Josh Marshall ---
Confirmed in 8.1.1
Also, looking over the following documents:
https://en.cppreference.com/w/cpp/types/ptrdiff_t
https://en.cppreference.com/w/cpp/iterator/iterator
http://en.cppreference.com/w/cpp/iterator/
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86015
--- Comment #8 from Josh Marshall ---
If this code is to work, given that this is the only way to track in detail use
of various stdlib internals, one of two things need to change. Either all
assignments to _Distance need to be explicitly wrappe
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86015
--- Comment #7 from Josh Marshall ---
I got the licensing cleared up over the weekend, and so I can actually
reference the code in question for this.
https://github.com/anadon/Sort-Comparisons-and-Performance-metrics
The only way to track use o
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86015
--- Comment #6 from Josh Marshall ---
There is a kind of legacy manual specification, and a reason for that was for
tracking usage. What I'm working on is adapted from David Musser's 1997 code
which was using proposed and developmental stdlib co
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86015
--- Comment #5 from Jonathan Wakely ---
Every version of the standard says the same thing under iterator requirements:
"For every iterator type X for which equality is defined, there is a
corresponding signed integer type called the difference t
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86015
--- Comment #4 from Josh Marshall ---
These changes may make the stdlib implementation more robust, but there may be
an argument to stick to the more strict standard or tweak the standard. Could
you link to the standard doc you're pulling from?
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86015
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