473,385 Members | 1,766 Online
Bytes | Software Development & Data Engineering Community
Post Job

Home Posts Topics Members FAQ

Join Bytes to post your question to a community of 473,385 software developers and data experts.

A conversion question

Hi !

If we define such conversion operator for Zclass :

class ZClass {

operator char*(void);
};

How can we write explicit conversion without using this :

typedef char* charPtr; // Tricky way.
ZClass xmpl(...);
char* s =charPtr(xmpl);

(char* s; s =xmpl; would work but how cleanly write EXPLICIT conversion
?)

Thanks for advance.

Fabrice

May 21 '06 #1
2 1450
<fa*************@free.fr> wrote in message
news:11**********************@y43g2000cwc.googlegr oups.com...
: If we define such conversion operator for Zclass :
:
: class ZClass {
:
: operator char*(void);
: };
:
: How can we write explicit conversion without using this :
:
: typedef char* charPtr; // Tricky way.
: ZClass xmpl(...);
: char* s =charPtr(xmpl);
:
: (char* s; s =xmpl; would work but how cleanly write EXPLICIT conversion
: ?)

Are you looking for the following syntax ? :
char* s = xmpl.operator char*();
This explicitly calls the conversion operator.

Besides that, you have a choice of:
char* s = static_cast<char*>(xmpl); // C++-style cast
char* s = (char*)xmpl; // C-style cast
.... and probably more...

hth -Ivan
--
http://ivan.vecerina.com/contact/?subject=NG_POST <- email contact form
Brainbench MVP for C++ <> http://www.brainbench.com
May 21 '06 #2
> Are you looking for the following syntax ? :
char* s = xmpl.operator char*();


Yes, it is exactly what I needed !
Thank you very much.

I'm sad I wasn't able to find this by myself...

Fabrice

May 21 '06 #3

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

2
by: Russell Reagan | last post by:
In a newer version of a chess program I am writing, I have created classes that are (more or less) drop in replacements for things that used to be plain old integer or enumerated variables (colors,...
5
by: Vijai Kalyan | last post by:
Hello, I have come back to C++ after a couple of years with Java so I am quite rusty and this question may seem poor: My platform is Windows XP with MSVC 7.1. I have a class with a...
7
by: Michael Lehn | last post by:
Hi, I have a question regarding the conversion of objects. When is the conversion done by the constructor and when by the operator. My feeling tells me that the constructor is preferred. But...
26
by: David W. Fenton | last post by:
A client is panicking about their large Access application, which has been running smoothly with 100s of thousands of records for quite some time. They have a big project in the next year that will...
31
by: Bjørn Augestad | last post by:
Below is a program which converts a double to an integer in two different ways, giving me two different values for the int. The basic expression is 1.0 / (1.0 * 365.0) which should be 365, but one...
4
by: Nikhil Patel | last post by:
Hi all, I am a VB6 programmer and learning C#. I am currently reading a chapter on types. I have question regarding enums. Why do we need to convert enum members to the value that they represent?...
2
by: Alex Sedow | last post by:
Why explicit conversion from SomeType* to IntPtr is not ambiguous (according to standart)? Example: // System.IntPtr class IntPtr { public static explicit System.IntPtr (int); public...
47
by: rawCoder | last post by:
Hi, Just wanted to know if there is any speed difference between VB conversion Keywords like CInt, Clng, CStr, CDbl, CBool etc. ..NETs Convert.To<...> methods. And which is better to be...
1
by: hunter hou | last post by:
Hello,Please look at the following code(from C++ in a nutshell) and my questions.Thanks,***Hunter... typedef void (*strproc)(const char*); void print(const char* str) { std::cout << "const...
21
by: REH | last post by:
It it permissible to use the constructor style cast with primitives such as "unsigned long"? One of my compilers accepts this syntax, the other does not. The failing one chokes on the fact that the...
0
by: Charles Arthur | last post by:
How do i turn on java script on a villaon, callus and itel keypad mobile phone
0
by: aa123db | last post by:
Variable and constants Use var or let for variables and const fror constants. Var foo ='bar'; Let foo ='bar';const baz ='bar'; Functions function $name$ ($parameters$) { } ...
0
by: ryjfgjl | last post by:
If we have dozens or hundreds of excel to import into the database, if we use the excel import function provided by database editors such as navicat, it will be extremely tedious and time-consuming...
0
by: ryjfgjl | last post by:
In our work, we often receive Excel tables with data in the same format. If we want to analyze these data, it can be difficult to analyze them because the data is spread across multiple Excel files...
0
by: emmanuelkatto | last post by:
Hi All, I am Emmanuel katto from Uganda. I want to ask what challenges you've faced while migrating a website to cloud. Please let me know. Thanks! Emmanuel
1
by: nemocccc | last post by:
hello, everyone, I want to develop a software for my android phone for daily needs, any suggestions?
1
by: Sonnysonu | last post by:
This is the data of csv file 1 2 3 1 2 3 1 2 3 1 2 3 2 3 2 3 3 the lengths should be different i have to store the data by column-wise with in the specific length. suppose the i have to...
0
by: Hystou | last post by:
There are some requirements for setting up RAID: 1. The motherboard and BIOS support RAID configuration. 2. The motherboard has 2 or more available SATA protocol SSD/HDD slots (including MSATA, M.2...
0
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.