Re: Why no compilation error - Assigning int to std::string?

From:

"Doug Harrison [MVP]" <dsh@mvps.org>

Newsgroups:

microsoft.public.vc.language

Date:

Thu, 05 Jul 2007 15:38:54 -0500

Message-ID:

<t2lq8397u8u2efbn85bfrcr8j9d2fhv1vm@4ax.com>

On Thu, 5 Jul 2007 16:21:47 -0400, "Duane Hebert" <spoo@flarn.com> wrote:

I am using warning level 4 with VC7.1. I have the service pack
for 7.1 installed. It's possibly something else, here's my command
line config for the compiler:

/Od <snip most of my includes>
/I "C:\MSVC\boost_1_33_0" /I ".\GeneratedFiles\Debug" /I ".\GeneratedFiles"
/D
"WIN32" /D "QT_CORE_LIB" /D "QT_GUI_LIB" /D "QT_SQL_LIB" /FD /EHsc /MDd
/Zc:forScope /Fo"Debug/"
/Fd"Debug/vc70.pdb" /W4 /nologo /c /Zi /TP /wd4100 /wd4127 /wd4511 /wd4512

Warning level 4 and not ignoring C4244.

I dunno, as long as I bump the warning level to /W4, I get the warning even
when I add the code:

extern int n;
char x = n;

to a default VC7.1 Win32 console project. I can think of two things. If you
aren't getting a linker error about n not being defined, you probably added
it above a precompiled header #include, because the compiler ignores
everything up to that #include. If you are getting a linker error, then
something has demoted C4244 to a lower warning level or turned it off.

--
Doug Harrison
Visual C++ MVP