string literals

[bearophile]

Robert Fraser:
> Saaa wrote:
> > char[] str;
> > char[] str1 = "abc";
> > str[0] = 'b';        // error, "abc" is read only, may crash
> > Is this example correct?
> Yes, because the "abc" is a string literal, that is to say it's written 
> in the code itself. If str1 was loaded from an outside source, such as a 
> file, user input, etc., then you could modify it without issue.
> 
> For string LITERALS (a string literal is one you write in the code 
> itself, usually encased in double-quotes), modifying them without 
> calling .dup on them is bad. For other strings, it's perfectly okay.

I am no an expert of D yet, but I think in the following D 1.x code str is a dynamic array, so it can be changed safely:

void main() {
    char[] str = "abc";
    str[0] = 'b';
}

Bye,
bearophile