Re: Sturcts with constructor (dmd1.x)

[Ellery Newcomer]

On 01/11/2010 04:06 PM, Nrgyzer wrote:

Hello everyone,

I currently try to create a structure with a construtor, but I always get the 
following messages:

Error: Foo.this constructors are only for class definitions
Error: constructor lisim.lsResult.lsResult.this special member functions not 
allowed for structs

By compiling the follwing code:

struct Foo {
     int len;
     bool len_done;
     const char* str;
     int length()
     {   if (!len_done)
         {   len = strlen(str);
            len_done = true;
         }
        return len;
     }
     this(char* str) { this.str = str; }
}
const Foo f = Foo("hello");
bar(f.length);

I found that source on 
http://www.digitalmars.com/d/2.0/const-faq.html#logical-const. I know that this 
source is for d2 and not for d1 but does d1 support similar operations (or is 
there no support for struct-constructors)?

Thanks in advance :)

get rid of the constructor and replace

> const Foo f = Foo("hello");

with

const Foo f = Foo(0,false,"hello");

and it will work, if you can forgive how ugly it is.