[omniORB] Problem of CORBA::String in MFC Application

Fri, 26 Nov 1999 16:07:22 -0300

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In an ISO C++ compiler string literals are of const char* type. gcc =
2.95.2
conforms the standard in that point. There=B4s an option to make them =
of type
char*. (-fwritable-strings I think)

-----Mensaje original-----
De: Guy Trudel [mailto:gtrudel@mediatrix.com]
Enviado el: viernes 26 de noviembre de 1999 15:51
Para: Omniorb-List (E-mail)
CC: 'Ji-Yong D. Chung'
Asunto: RE: [omniORB] Problem of CORBA::String in MFC Application

> It seems to me, if there is CORBA::String_var::operator=3D(const char =
*),
both of the preceding statements should yield the same result.

If you have only CORBA::String_var(const char*) everything is ok, but
Corba::String_var also have CORBA::String_var(char*) and since string
literals are not <const char*>, this is the copy constructor called.

inline _CORBA_String_var(char *p) { _data =3D p; }

and not

inline _CORBA_String_var(const char* p)=20
{=20
	if( p ) _data =3D string_dup(p);
  	else    _data =3D 0;=20
}

Guy Trudel

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In an ISO C++ compiler string literals are of const =
char* type. gcc 2.95.2 conforms the standard in that point. There=B4s =
an option to make them of type char*. (-fwritable-strings I =
think)

-----Mensaje original-----
 De: Guy Trudel [<A =
HREF=3D"mailto:gtrudel@mediatrix.com">mailto:gtrudel@mediatrix.com</A>]<=
/FONT>
 Enviado el: viernes 26 de noviembre de 1999 =
15:51
 Para: Omniorb-List (E-mail)
 CC: 'Ji-Yong D. Chung'
 Asunto: RE: [omniORB] Problem of CORBA::String in =
MFC Application

<P><FONT SIZE=3D2>&gt; It seems to me, if there is =
CORBA::String_var::operator=3D(const char *),</FONT>
<BR><FONT SIZE=3D2>both of the preceding statements should yield the =
same result.</FONT>
</P>

<P><FONT SIZE=3D2>If you have only CORBA::String_var(const char*) =
everything is ok, but</FONT>
<BR><FONT SIZE=3D2>Corba::String_var also have CORBA::String_var(char*) =
and since string</FONT>
<BR><FONT SIZE=3D2>literals are not &lt;const char*&gt;, this is the =
copy constructor called.</FONT>
</P>

<P><FONT SIZE=3D2>inline _CORBA_String_var(char *p) { _data =3D p; =
}</FONT>
</P>

<P><FONT SIZE=3D2>and not</FONT>
</P>

<P><FONT SIZE=3D2>inline _CORBA_String_var(const char* p) </FONT>
<BR><FONT SIZE=3D2>{ </FONT>
<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT SIZE=3D2>if( p ) =
_data =3D string_dup(p);</FONT>
<BR><FONT SIZE=3D2>&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
else&nbsp;&nbsp;&nbsp; _data =3D 0; </FONT>
<BR><FONT SIZE=3D2>}</FONT>
</P>

<P><FONT SIZE=3D2>Guy Trudel</FONT>
</P>

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