| Issue |
77104
|
| Summary |
[Clang] Can not friend a function in root namespace with non-void return type
|
| Labels |
clang
|
| Assignees |
|
| Reporter |
Sh3Rm4n
|
Compiler Explorer: https://godbolt.org/z/Gzhdo54W7
Clang is not able to friend a function, which lives in the root namespace.
```cpp
#include <cstdint>
uint32_t friend_foo();
namespace n {
class bar {
friend uint32_t ::friend_foo();
void private_method() {}
};
}
uint32_t friend_foo() {
n::bar b;
b.private_method();
return 0;
}
```
It has problems to swallow the `friend uint32_t ::friend_foo();` syntax.
```
<source>:7:12: error: 'uint32_t' (aka 'unsigned int') is not a class, namespace, or enumeration
7 | friend uint32_t ::friend_foo();
|
```
Switching the return type to `void` removes the error.
```diff
3c3
< uint32_t friend_foo();
---
> void friend_foo();
7c7
< friend uint32_t ::friend_foo();
---
> friend void ::friend_foo();
14c14
< uint32_t friend_foo() {
---
> void friend_foo() {
18,19d17
<
< return 0;
```
or moving the class and the function to the same namespace, so that the `::` prefix is not needed does remove the error.
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