Re: c++/6940: taking sizeof array parameter should trigger a warning

Re: c++/6940: taking sizeof array parameter should trigger a warning

[nathan]

Synopsis: taking sizeof array parameter should trigger a warning

State-Changed-From-To: open->analyzed
State-Changed-By: nathan
State-Changed-When: Sat Sep 14 15:11:19 2002
State-Changed-Why:
    this seems like a sensible warning

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=6940

c++/6940: taking sizeof array parameter should trigger a warning

[Marco.Franzen]

>Number:         6940
>Category:       c++
>Synopsis:       taking sizeof array parameter should trigger a warning
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    unassigned
>State:          open
>Class:          change-request
>Submitter-Id:   net
>Arrival-Date:   Wed Jun 05 14:16:02 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator:     Marco Franzen
>Release:        gcc-3.1
>Organization:
>Environment:

>Description:
Neither the C nor the C++ front-end of GCC 3.1 issues a warning for this.  (I tried -W -Wall for both.)

I know the generated code is absolutely correct, but a warning would be in order (and should probably be on by default, given it will be rare outside obfuscation contests).
>How-To-Repeat:
int func(int array[], int* pointer)
{
        int n1 = sizeof(array);   // no, it isn't
        int n2 = sizeof(pointer);
	return n1 - n2;
}

int main()
{
	int v[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
	return func (v, v);
}
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: