https://bugs.llvm.org/show_bug.cgi?id=40233
Bug ID: 40233
Summary: friend definition makes function visible when it
should not
Product: clang
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: C++
Assignee: unassignedclangb...@nondot.org
Reporter: rhain...@binghamton.edu
CC: blitzrak...@gmail.com, dgre...@apple.com,
erik.pilking...@gmail.com, llvm-bugs@lists.llvm.org,
richard-l...@metafoo.co.uk
Based on this stackoverflow question:
https://stackoverflow.com/q/54055638/1013719
gcc correctly rejects the following, while clang accepts:
```
class Cls {
friend void func(int) { }
friend void ::func(int);
};
```
with:
```
error: ‘void func(int)’ has not been declared within ‘::’
friend void ::func(int);
^~
note: only here as a ‘friend’
friend void func(int) { }
^~~~
```
The friend definition should not make `func` visible by
http://eel.is/c++draft/namespace.memdef#3.sentence-2
> The friend declaration does not by itself make the name visible to
> unqualified lookup or qualified lookup.
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