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* [Bug c++/99778] New: Spurious -Wzero-as-null-pointer-constant on three-way comparisons
@ 2021-03-26 0:55 headch at gmail dot com
2021-03-26 8:59 ` [Bug c++/99778] " rguenth at gcc dot gnu.org
2021-06-04 17:17 ` redi at gcc dot gnu.org
0 siblings, 2 replies; 3+ messages in thread
From: headch at gmail dot com @ 2021-03-26 0:55 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99778
Bug ID: 99778
Summary: Spurious -Wzero-as-null-pointer-constant on three-way
comparisons
Product: gcc
Version: 10.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: headch at gmail dot com
Target Milestone: ---
Consider the following code:
#include <compare>
#include <iostream>
int main() {
std::strong_ordering o = 1 <=> 2;
if(o == 0) {
std::cout << "equal\n";
} else {
std::cout << "unequal\n";
}
return 0;
}
When compiled with -Wzero-as-null-pointer-constant, this generates a warning on
the “if” line.
This sounds almost the same as bug #95242, except that bug is closed as fixed
for 10.2, and I am running 10.2.0 and still get this problem; also, the code
quoted in that bug does not generate a warning for me, while this code still
does.
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/99778] Spurious -Wzero-as-null-pointer-constant on three-way comparisons
2021-03-26 0:55 [Bug c++/99778] New: Spurious -Wzero-as-null-pointer-constant on three-way comparisons headch at gmail dot com
@ 2021-03-26 8:59 ` rguenth at gcc dot gnu.org
2021-06-04 17:17 ` redi at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: rguenth at gcc dot gnu.org @ 2021-03-26 8:59 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99778
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to fail| |11.0
Status|UNCONFIRMED |NEW
Keywords| |diagnostic
Last reconfirmed| |2021-03-26
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed on trunk as well.
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/99778] Spurious -Wzero-as-null-pointer-constant on three-way comparisons
2021-03-26 0:55 [Bug c++/99778] New: Spurious -Wzero-as-null-pointer-constant on three-way comparisons headch at gmail dot com
2021-03-26 8:59 ` [Bug c++/99778] " rguenth at gcc dot gnu.org
@ 2021-06-04 17:17 ` redi at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: redi at gcc dot gnu.org @ 2021-06-04 17:17 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99778
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I'm closing this as a dup of the newer PR 100903 because that has more
discussion.
*** This bug has been marked as a duplicate of bug 100903 ***
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2021-06-04 17:17 UTC | newest]
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2021-03-26 0:55 [Bug c++/99778] New: Spurious -Wzero-as-null-pointer-constant on three-way comparisons headch at gmail dot com
2021-03-26 8:59 ` [Bug c++/99778] " rguenth at gcc dot gnu.org
2021-06-04 17:17 ` redi at gcc dot gnu.org
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