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Date: Sun, 17 Feb 2002 02:06:00 -0000
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Subject: c++/5711: Questionable -Wshadow warning for function template's local variable
X-SW-Source: 2002-02/txt/msg00384.txt.bz2
List-Id: <gcc-prs.sourceware.org>


>Number:         5711
>Category:       c++
>Synopsis:       Questionable -Wshadow warning for function template's local variable
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Feb 17 02:06:01 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     Hiroki Horiuchi
>Release:        3.0.3
>Organization:
>Environment:
CYGWIN_NT-5.0 1.3.3(0.46/3/2) 2001-09-12 23:54 i686 unknown
>Description:
file attached is warned as below when -Wshadow given.

a.c: In function `T a(T) [with T = int]':
a.c:27:   instantiated from here
a.c:4: warning: declaration of `x' shadows global declaration
a.c: In function `T b() [with T = int]':
a.c:27:   instantiated from here
a.c:12: warning: declaration of `x' shadows global declaration
a.c: In function `T c() [with T = int]':
a.c:27:   instantiated from here
a.c:20: warning: declaration of `x' shadows global declaration

bash-2.05$ g++ -v
Reading specs from /1/gcc-3.0.3/lib/gcc-lib/i686-pc-cygwin/3.0.3/specs
Configured with: ./configure --prefix=/1/gcc-3.0.3
Thread model: single
gcc version 3.0.3
>How-To-Repeat:
g++ -fsyntax-only -Wshadow a.c
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:
----gnatsweb-attachment----
Content-Type: text/plain; name="a.c"
Content-Disposition: inline; filename="a.c"

template<class T>
T
a(T x)
{
	return x;
}

template<class T>
T
b()
{
	T x = 0;
	return x;
}

template<class T>
T
c()
{
	static T x = 0;
	return x;
}

int
x()
{
	return a(0) + b<int>() + c<int>();
}