Re: Method should return list<>, instead returns BOOL, no error. Why not?

From:
"Doug Harrison [MVP]" <dsh@mvps.org>
Newsgroups:
microsoft.public.vc.stl
Date:
Fri, 02 Mar 2007 16:46:22 -0600
Message-ID:
<5r9hu2do2a6t7qd094fhen6e08qv15a5ke@4ax.com>
On 2 Mar 2007 11:59:24 -0800, CedricCicada@gmail.com wrote:

Greetings!

I have a class with a method that is declared to return a std::list<>
object, but instead it returns a BOOL value. However, no compiler
error is thrown. Why not?

This makes me think that there's some implicit conversion between a
long and a list<>, but that makes no sense to me.

Code below.

RobR

=========== TagNamer.h ===============

#include "opc_defs.h"
#include "ComString.h"

#include <list>
#include "IniEx.h"

typedef std::list<CCOMString> taglist;
typedef std::list<CCOMString>::iterator tag_iter;

class _OPC_EXPORT CTagNamer
{
public:
    CTagNamer();
    virtual ~CTagNamer();

// void ReadIniFile();
    taglist GetTagList(CCOMString tagFileName);

private:
    CIniEx m_iniEx;
    CCOMString GetTagID(int baseNumber, const CCOMString& tagName);

    CCOMString m_baseTemplate;
    CCOMString m_globalTemplate;
    CCOMString m_separator;

};

======== TagNamer.cpp ============

taglist CTagNamer::GetTagList(CCOMString tagFileName)
{
    BOOL result;
    return result;
}


That shouldn't happen, because all of list's single-argument ctors are
supposed to be declared explicit. Your example can be simplified into:

#include <list>

std::list<int>
f()
{
   return 1;
}

This compiles for me in VC6 but not VC7.1 or VC8, so I guess you're using
VC6?

--
Doug Harrison
Visual C++ MVP

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