[Bug c++/123823] New: [reflection] wrong parsing of :]<

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123823

            Bug ID: 123823
           Summary: [reflection] wrong parsing of :]<
           Product: gcc
           Version: 16.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: mpolacek at gcc dot gnu.org
  Target Milestone: ---

```
int i;
constexpr auto r = ^^i;
bool b = [:r:] < 42;
```

This should compile, but we think the '<' starts a template-argument-list.