[Bug c++/94214] New: function lookup with overloaded operators accepts invalid

[Bug c++/94214] New: function lookup with overloaded operators accepts invalid

[niklas at nolte dot dev]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94214

            Bug ID: 94214
           Summary: function lookup with overloaded operators accepts
                    invalid
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: niklas at nolte dot dev
  Target Milestone: ---

Sample code:
```
#include <vector>

template <typename T>
void blub(std::vector<T> const& i) {
  -i;
  //getsize(i); //this also fails in gcc
}

int operator-(std::vector<int> const& i) {
    return i.size();
}

int getsize(std::vector<int> const& i) {
    return i.size();
}

int main() { blub(std::vector<int>{1}); }
```

this shouldn't compile, it doesn't in clang..

See
- https://godbolt.org/z/hgGeH3

-
https://stackoverflow.com/questions/60740257/clang-vs-gcc-function-lookup-with-operator-overloads?noredirect=1#comment107466162_60740257
-
https://stackoverflow.com/questions/58793092/two-phase-function-template-compilation-not-only-adl-is-employed-in-the-2nd-p

[Bug c++/94214] function lookup with overloaded operators accepts invalid

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94214

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Looks like a dup of PR 51577

[Bug c++/94214] function lookup with overloaded operators accepts invalid

[niklas at nolte dot dev]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94214

--- Comment #2 from niklas at nolte dot dev ---
(In reply to Jonathan Wakely from comment #1)
> Looks like a dup of PR 51577

agreed

[Bug c++/94214] function lookup with overloaded operators accepts invalid

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94214

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |DUPLICATE
             Status|UNCONFIRMED                 |RESOLVED

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
.

*** This bug has been marked as a duplicate of bug 51577 ***