• Shriramana Sharma (7/7) Dec 20 2015 I'm trying to interface to a C function:
• Jakob Ovrum (6/12) Dec 20 2015 Change it to:
• Basile B. (9/15) Dec 20 2015 without the parens, 'const' means that the function doesn't
• Shriramana Sharma (4/7) Dec 20 2015 Thank you people.

Shriramana Sharma <samjnaa_dont_spam_me gmail.com> writes:

I'm trying to interface to a C function:

extern(C) const char * textAttrN(const char * specString, size_t n);

and getting the error:

Error: function <src>.textAttrN without 'this' cannot be const

Please advise as to what I'm doing wrong?! :-(

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Jakob Ovrum <jakobovrum gmail.com> writes:

On Monday, 21 December 2015 at 02:03:14 UTC, Shriramana Sharma 
wrote:
 I'm trying to interface to a C function:

 extern(C) const char * textAttrN(const char * specString, 
 size_t n);

 and getting the error:

 Error: function <src>.textAttrN without 'this' cannot be const

 Please advise as to what I'm doing wrong?! :-(

Change it to:

extern(C) const(char)* textAttrN(const char * specString, size_t 
n);
                ^    ^

Basile B. <b2.temp gmx.com> writes:

On Monday, 21 December 2015 at 02:03:14 UTC, Shriramana Sharma 
wrote:
 I'm trying to interface to a C function:

 extern(C) const char * textAttrN(const char * specString, 
 size_t n);

 and getting the error:

 Error: function <src>.textAttrN without 'this' cannot be const

 Please advise as to what I'm doing wrong?! :-(

without the parens, 'const' means that the function doesn't 
mutate the state of the object or of the struct it's declared in. 
So it's meaningless for a global function.

To avoid the confusion, take the habit to put 'const' at the 
right of the function declaration when it's related to a member 
function and only to the left when it's related to the type, and 
then to the left <=> always with parens.

Shriramana Sharma <samjnaa_dont_spam_me gmail.com> writes:

Basile B.  wrote:

 without the parens, 'const' means that the function doesn't
 mutate the state of the object or of the struct it's declared in.
 So it's meaningless for a global function.

Thank you people.

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