Quick question

[parag_paul]

Sorry for aksing too many today ,

I have seen const char &strl;
where you cannot change str.

Is there a similar concept like,
char* const str ;
for references,

char const &str;

etc
If not , what is the reason for being so.
-Parag

 

[Victor Bazarov]

Sorry for aksing too many today ,

I have seen const char &strl;
where you cannot change str.

You cannot change what 'str' refers to because it's 'const'.
You cannot change 'str' itself because there is no syntax for
that (since 'str' is a reference).

Is there a similar concept like,
char* const str ;
for references,

char const &str;

Huh? That's not the same. 'char' here is const. When you
declare

char* const str;

'str' is const, not 'char'. 'char' there is actually non-const.

etc

'etc' what?

If not , what is the reason for being so.

What is it exactly you need to know?

V

 

[Brian Szmyd]

Sorry for aksing too many today ,

I have seen const char &strl;
where you cannot change str.

Is there a similar concept like,
char* const str ;
for references,

char const &str;

etc
If not , what is the reason for being so. -Parag

I think what you're looking for is: char& str const

const always acts to the left, unless there is no left then to the right.

const char* == char const * != char* const

 

[Brian Szmyd]

On Fri, 02 Nov 2007 11:41:02 -0700, (e-mail address removed) wrote:

I think what you're looking for is: char& str const

const always acts to the left, unless there is no left then to the
right.

const char* == char const * != char* const

Oops...I posted that too quickly. char& str const makes no sense, you
const the type, not the name. str is never const, it's just a variable
name. the type "char" or "char*" is what is const.

 

[Victor Bazarov]

Oops...I posted that too quickly. char& str const makes no sense, you
const the type, not the name. str is never const, it's just a
variable name. the type "char" or "char*" is what is const.

Well, the syntax you were looking for is

char & const str

but it does not exists since references cannot have cv-qualifiers
because they are not objects.

The syntax (if it existed) would be just like

char * const str

(here 'str' is a constant pointer to [non-constant] char).

V

 

[James Kanze]

[...]

Well, the syntax you were looking for is

char & const str

but it does not exists since references cannot have cv-qualifiers
because they are not objects.

And of course, the reference itself is immutable anyway.