| Issue |
147324
|
| Summary |
clang: Missing line and file in message error when ‘auto’ is used in a not permitted context (and bad diagnostic)
|
| Labels |
clang
|
| Assignees |
|
| Reporter |
jonathanpoelen
|
With this code:
```cpp
int main()
{
struct A
{
void foo(auto x) {} // auto not permitted
};
}
```
And clang-18,19,20 or trunk and `-std=c++20` or `-std=c++23`:
> error: templates cannot be declared inside of a local class
No line number, no filename and refer to `template`.
With `-std=c++17`:
```
test.cpp:5:14: error: 'auto' not allowed in function prototype
5 | void foo(auto x) {}
| ^~~~
```
With gcc (same message for C++17 or C++20):
```
test.cpp: In function ‘int main()’:
test.cpp:5:14: error: ‘auto’ parameter not permitted in this context
5 | void foo(auto x) {}
| ^~~~
```
https://gcc.godbolt.org/z/5YGdh6Pnb
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