Issue 144321
Summary Compilation error with "alignas"
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Assignees
Reporter 8ss-boop
    ```
#include <stdint.h>
#include <stdarg.h>

void compute_values(int count, ...) {
    static _Atomic(int) shared_value = 0;
    va_list args;
    va_start(args, count);

    int temp[16] = {0};

    for (int i = 0; i < count && i < 16; i++) {
        int val = va_arg(args, int);
        temp[i] = (val > 0)
            ? ((val & 1) ? (temp[i ? i - 1 : 0] + val) : (shared_value += val))
            : ((alignas(16) int){ val * -1 });
 }
}
```

Compilation error: 
```
<source>:16:17: error: expected _expression_
   16 |             : ((alignas(16) int){ val * -1 });
      | ^
1 error generated.
Compiler returned: 1
```

https://godbolt.org/z/478dvGehr

Is this a bug?


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