https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99701
Bug ID: 99701
Summary: std::nullptr_t can be compared with relational ops
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: cjdb.ns at gmail dot com
Target Milestone: ---
Created attachment 50443
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50443&action=edit
Temp file for provided source
The following program is valid in all versions of GCC from 4.7.1 through
trunk[1]. Relational operations on std::nullptr_t don't really make sense since
there's only one value.
```
auto lt = nullptr < nullptr;
auto gt = nullptr > nullptr;
auto le = nullptr <= nullptr;
auto ge = nullptr >= nullptr;
```
This was apparently addressed by DR583/N3478 (thanks to Richard Smith for
providing these).
[1]: https://godbolt.org/z/h11183
# Versions
* All GCC releases at least as far back as 4.7.1 (where I stopped looking).
# System type
* Debian (checked GCC 10.2.1)
* Compiler Explorer (checked all other reported versions).
# Options given to GCC
`g++ -save-temps nullptr-relop.cpp -c -std=c++20`
