| Issue |
173732
|
| Summary |
clang-tidy: `modernize-use-using` wrongly modifies typedef of referenced array
|
| Labels |
clang-tidy
|
| Assignees |
|
| Reporter |
e-kwsm
|
<!--This is similar to #65055.-->
```console
$ clang-tidy --version
LLVM (http://llvm.org/):
LLVM version 21.1.6
Optimized build.
```
Prepare the following file, `/tmp/a.cpp`:
```cpp
typedef char (&refarray)[2];
typedef char &ref;
```
and `/tmp/compile_commands.json`:
```json
[
{
"directory": "/tmp",
"command": "/usr/bin/clang++ -o a.o -c a.cpp",
"file": "a.cpp",
"output": "a.o"
}
]
```
Then run clang-tidy:
```console
$ clang-tidy --checks='-*,modernize-use-using' --fix a.cpp
2 warnings generated.
/tmp/a.cpp:1:1: warning: use 'using' instead of 'typedef' [modernize-use-using]
1 | typedef char (&refarray)[2];
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
| using refarray = char (&)[2]
/tmp/a.cpp:2:6: warning: use 'using' instead of 'typedef' [modernize-use-using]
2 | typedef char &ref;
| ^~~~~~~~~~~~
```
which gives malformed code
```
using refarray = char (&)[2];
typed;
using ref = char &;
```
<https://godbolt.org/z/cxdfnGhEY>
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