[cfe-dev] -Wc++-compat doesn't warn for C++ keywords and nested structs

[Prathamesh Kulkarni]

It appears diagnostic for assignment from void * is also missed.
Test-case:
int main(void)
{
  void *q = 0;
  int *p;
  p = q;
  return 0;
}

gcc -fsyntax-only -Wc++-compat prints:
void-ptr-cast.c:5:5: warning: request for implicit conversion from
‘void *’ to ‘int *’ not permitted in C++ [-Wc++-compat]
   p = q;
     ^

Thank you,
Prathamesh





On Tue, Nov 11, 2014 at 9:07 AM, Richard Smith <richard at metafoo.co.uk> wrote:
> Filed as llvm.org/PR21524
>
> On Mon, Nov 10, 2014 at 4:16 AM, Prathamesh Kulkarni
> <bilbotheelffriend at gmail.com> wrote:
>>
>> Hi,
>>   clang doesn't print warning for following test-case:
>> compiled with: clang -fsyntax-only -Wc++-compat
>>
>> int new;
>> struct A
>> {
>>   struct B
>>   {
>>     int x;
>>   }bs;
>>   int y;
>> };
>> struct B b;
>>
>>
>> gcc -fsyntax-only -Wc++-compat prints following warnings (gcc-4.9.1
>> ubuntu):
>>
>> t.c:1:5: warning: identifier ‘new’ conflicts with C++ keyword
>> [-Wc++-compat]
>>  int new;
>>       ^
>> t.c:13:8: warning: struct defined in struct or union is not visible in
>> C++ [-Wc++-compat]
>>  struct B b;
>>            ^
>> t.c:5:10: note: struct defined here
>>    struct B
>>              ^
>> clang --version:
>> Ubuntu clang version 3.5.0-4ubuntu2 (tags/RELEASE_350/final) (based on
>> LLVM 3.5.0)
>> Target: x86_64-pc-linux-gnu
>> Thread model: posix
>>
>> Thank you,
>> Prathamesh
>>
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>
>