• Pablo Ripolles <in-call gmx.net> Jun 19 2007

Pablo Ripolles <in-call gmx.net> writes:

Walter Bright Wrote:

 Johan Granberg wrote:
 I don't think invariant here is such a great idea, consider the following
 function.
 
 void foo(string s){}
 
 if string is const this can be called with both char[] and const(char)[] (if
 not please correct me) but if my understanding is correct char[] would not
 work if string is invariant. This will lead to an unessesary amount of
 cast(invariant) when calling functions on local strings (as functions that
 create strings will have to modify the when they are being built).


 That's essentially my argument against it, too. The other side is that 
 treating strings as if they are value types is common and effective in 
 other languages. (For example, strings in Perl are invariant.)


And in Python too!