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Date: Tue, 2 Aug 2005 12:07:38 +0200
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Subject: g++-4.0: invalid 'control reaches end of non-void function'
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Package: g++-4.0
Version: 4.0.1-2
compiling with '-Wall' gives in some cases the warning 'control reaches end=
of non-void function' for code of the following form
if (a)
return 10;
else
return 20;
at the end of a function. The 3.3er version of g++ does not give the warnin=
g.
At the end is an example to test. Further removing of code makes the warnin=
g disappear although it should have nothing to do with it.
-- versions
$ g++-4.0 -c -Wall end_of_non-void_function.cpp=20
end_of_non-void_function.cpp: In member function 'Hand Player::handofplayer=
(const Player&) const':
end_of_non-void_function.cpp:67: warning: control reaches end of non-void f=
unction
$ g++-4.0 -v
Using built-in specs.
Target: i486-linux-gnu
Configured with: ../src/configure -v --enable-languages=3Dc,c++,java,f95,ob=
jc,ada,treelang --prefix=3D/usr --enable-shared --with-system-zlib --libexe=
cdir=3D/usr/lib --enable-nls --without-included-gettext --enable-threads=3D=
posix --program-suffix=3D-4.0 --enable-__cxa_atexit --enable-libstdcxx-allo=
cator=3Dmt --enable-clocale=3Dgnu --enable-libstdcxx-debug --enable-java-gc=
=3Dboehm --enable-java-awt=3Dgtk --with-java-home=3D/usr/lib/jvm/java-1.4.2=
-gcj-4.0-1.4.2.0/jre --enable-mpfr --disable-werror --enable-checking=3Drel=
ease i486-linux-gnu
Thread model: posix
gcc version 4.0.1 (Debian 4.0.1-2)
$ dpkg -l g++-4.0
ii g++-4.0 4.0.1-2 The GNU C++ compiler
$ g++-3.3 -Wall -c end_of_non.cpp
$
$ g++-3.3 -v
Lese Spezifikationen von /usr/lib/gcc-lib/i486-linux/3.3.5/specs
Konfiguriert mit: ../src/configure -v --enable-languages=3Dc,c++,java,f77,p=
ascal,objc,ada,treelang --prefix=3D/usr --mandir=3D/usr/share/man --infodir=
=3D/usr/share/info --with-gxx-include-dir=3D/usr/include/c++/3.3 --enable-s=
hared --enable-__cxa_atexit --with-system-zlib --enable-nls --without-inclu=
ded-gettext --enable-clocale=3Dgnu --enable-debug --enable-java-gc=3Dboehm =
--enable-java-awt=3Dxlib --enable-objc-gc i486-linux
Thread-Modell: posix
gcc-Version 3.3.5 (Debian 1:3.3.5-13)
$ dpkg -l g++-3.3
ii g++-3.3 3.3.5-13 The GNU C++ compiler
The other packages are of the testing version but the kernel, which is 2.6.=
12.3 (from www.kernel.org), self compiled.
-- example file (compile with 'g++-4.0 -c -Wall')
class Player;
class Hand {
public:
Hand(Player const& player);
~Hand();
};
class Player {
public:
Hand const& hand() const;
Hand handofplayer(Player const& player) const;
};
Hand
Player::handofplayer( Player const& player ) const
{
if (false)
return this->hand();
// Ai, Player, Hand are self defined classes
Hand hand(player);
extern const bool INFO_AI;
extern const bool INFO_OTHER_FUNCTION;
if (INFO_AI && INFO_OTHER_FUNCTION)
return hand;
else
return hand;
}
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To: [EMAIL PROTECTED]
Subject: Bug#320947: invalid 'control reaches end of non-void function'
From: Falk Hueffner <[EMAIL PROTECTED]>
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Version: 4.0.1-6
Fixed.
--
Falk
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