pointer reference comparing with int in gcc 4.1.2

pointer reference comparing with int in gcc 4.1.2

[yangch]

This file cannot compile with gcc 4.1.2, but with gcc3.4.5 it works well.

#include <stdio.h>
#include <string.h>

typedef char str_t[10];

void f(str_t const &s)
{
printf("sizeof s:%d\n",sizeof(s));
if(s)
printf("%s\n",s);
}
int main()
{
str_t s1;
strcpy(s1,"abc");
f(s1);
printf("bytes of int:%d\n\n", sizeof(int)); 
return 0;
}

The command:
g++ test.cc
The output:
test.cc: In function 'void f(const char (&)[10])':
test.cc:9: error: invalid operands of types 'const char (&)[10]' and 'int'
to binary 'operator!='

I didn't find any hint in gcc change notes about this.Is there any way to
handle this without changing my source code?


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Re: pointer reference comparing with int in gcc 4.1.2

[me22]

On Mon, Dec 15, 2008 at 22:30, yangch <yangchanghua@gmail.com> wrote:
>
> void f(str_t const &s)
> {
> printf("sizeof s:%d\n",sizeof(s));
> if(s)
> printf("%s\n",s);
> }
>
> test.cc: In function 'void f(const char (&)[10])':
> test.cc:9: error: invalid operands of types 'const char (&)[10]' and 'int'
> to binary 'operator!='
>

I think it's just a bug in 4.1.2.  It compiles fine in 4.3.1.

HTH,
~ Scott

P.S. Rather odd that it talks about != there...

Re: pointer reference comparing with int in gcc 4.1.2

[yangch]

me22 wrote:
> 
> On Mon, Dec 15, 2008 at 22:30, yangch <yangchanghua@gmail.com> wrote:
>>
>> void f(str_t const &s)
>> {
>> printf("sizeof s:%d\n",sizeof(s));
>> if(s)
>> printf("%s\n",s);
>> }
>>
>> test.cc: In function 'void f(const char (&)[10])':
>> test.cc:9: error: invalid operands of types 'const char (&)[10]' and
>> 'int'
>> to binary 'operator!='
>>
> 
> I think it's just a bug in 4.1.2.  It compiles fine in 4.3.1.
> 
> HTH,
> ~ Scott
> 
> P.S. Rather odd that it talks about != there...
> 
> 

Do you know the bug number or name ?

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Re: pointer reference comparing with int in gcc 4.1.2

[me22]

On 2008-12-16, yangch <yangchanghua@gmail.com> wrote:
>
> Scott wrote:
>>
>> I think it's just a bug in 4.1.2.  It compiles fine in 4.3.1.
>>
>
> Do you know the bug number or name ?
>

No; I just have 4.1.2 and 4.3.1 installed, so I tried both.

~ Scott