From: "Steven L. Zook" <SLZook@Qualstar.com>
To: "Frans Englich" <frans.englich@telia.com>, <gcc-help@gcc.gnu.org>
Subject: RE: False positive warning: missing return statement and switch statements
Date: Tue, 15 Nov 2005 22:27:00 -0000 [thread overview]
Message-ID: <9E27B4AB55478346B9F7848926E49B7F011128A4@exchange1.qualstar.com> (raw)
What happens when someone calls with:
toInt( (Number)3 );
C/C++ lets you cast any numeric to an enum.
-----Original Message-----
From: gcc-help-owner@gcc.gnu.org [mailto:gcc-help-owner@gcc.gnu.org] On
Behalf Of Frans Englich
Sent: Tuesday, November 15, 2005 2:21 PM
To: gcc-help@gcc.gnu.org
Subject: False positive warning: missing return statement and switch
statements
Hello,
For the code below, when I invoke "g++ -Wall file.cpp" with GCC version
3.3.4, I get:
file.cpp: In function `int toInt(Number)':
file.cpp:20: warning: control reaches end of non-void function
------------------------------------------------------------------------
-
enum Number
{
Zero,
One,
Two
};
int toInt(const Number num)
{
switch(num)
{
case Zero:
return 0;
case One:
return 1;
case Two:
return 2;
}
}
int main()
{
Number num = Zero;
return toInt(num);
}
------------------------------------------------------------------------
-
I don't understand why the warning is issued. Isn't it fair to assume
that the argument(const Number num) is correct since it is strongly
typed, by being an enumerator?
Cheers,
Frans
next reply other threads:[~2005-11-15 22:27 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-11-15 22:27 Steven L. Zook [this message]
2005-11-15 22:40 ` Frans Englich
2005-11-15 22:47 ` John Love-Jensen
2005-11-15 22:49 ` Frans Englich
-- strict thread matches above, loose matches on Subject: below --
2005-11-15 23:26 Steven L. Zook
2005-11-15 23:31 ` Frans Englich
2005-11-15 22:10 Frans Englich
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