Friday 24 December 2010 @ 06:24:34 Caligo:
> Greetings,
> 
> I just joined here, so sorry if this has been posted before.
> 
> I'm reading TDPL and the example on page 8 doesn't compile.  I'm using the latest GDC with GCC 4.4.5.  I've checked the errata, but nothing for this error.
> 
> import std.stdio;
> import std.string;
> 
> void main(){
> 
>      size_t[char[]] dictionary;
>     foreach(line; stdin.byLine()){
>               foreach(word; splitter(strip(line))){
>                           if(word in dictionary) continue;
>                     auto newID = dictionary.length;
>                           dictionary[word] = newID;
>                     writeln(newID, '\t', word);
>             }
>     }
>     //writeln(dictionary.length);
> }
> 
> 
> This is the error:
> dictionary.d:12: Error: associative arrays can only be assigned values with
> immutable keys, not char[]
> 
> If i use immutable keys, it works, but it defeats the purpose.  So what's wrong with the code?

It works for DMD, I think it's a GDC bug (i'm new in D too, so i might be wrong). Keep in mind that GDC implements only D 1.0 and book has D 2.0 code.

Sincerely,
Mariusz Gliwiński

No, GDC supports D1 and D2.  Version 2.051 I think.  I know I've compiled mine with D2 support.

2010/12/24 Mariusz Gliwiński <alienballance@gmail.com>

> Friday 24 December 2010 @ 06:24:34 Caligo:
> > Greetings,
> >
> > I just joined here, so sorry if this has been posted before.
> >
> > I'm reading TDPL and the example on page 8 doesn't compile.  I'm using
> the
> > latest GDC with GCC 4.4.5.  I've checked the errata, but nothing for this error.
> >
> > import std.stdio;
> > import std.string;
> >
> > void main(){
> >
> >      size_t[char[]] dictionary;
> >     foreach(line; stdin.byLine()){
> >               foreach(word; splitter(strip(line))){
> >                           if(word in dictionary) continue;
> >                     auto newID = dictionary.length;
> >                           dictionary[word] = newID;
> >                     writeln(newID, '\t', word);
> >             }
> >     }
> >     //writeln(dictionary.length);
> > }
> >
> >
> > This is the error:
> > dictionary.d:12: Error: associative arrays can only be assigned values
> with
> > immutable keys, not char[]
> >
> > If i use immutable keys, it works, but it defeats the purpose.  So what's wrong with the code?
>
> It works for DMD, I think it's a GDC bug (i'm new in D too, so i might be wrong). Keep in mind that GDC implements only D 1.0 and book has D 2.0 code.
>
> Sincerely,
> Mariusz Gliwiński
>

I forgot to ask, what version of DMD are you using?

2010/12/24 Mariusz Gliwiński <alienballance@gmail.com>

> Friday 24 December 2010 @ 06:24:34 Caligo:
> > Greetings,
> >
> > I just joined here, so sorry if this has been posted before.
> >
> > I'm reading TDPL and the example on page 8 doesn't compile.  I'm using
> the
> > latest GDC with GCC 4.4.5.  I've checked the errata, but nothing for this error.
> >
> > import std.stdio;
> > import std.string;
> >
> > void main(){
> >
> >      size_t[char[]] dictionary;
> >     foreach(line; stdin.byLine()){
> >               foreach(word; splitter(strip(line))){
> >                           if(word in dictionary) continue;
> >                     auto newID = dictionary.length;
> >                           dictionary[word] = newID;
> >                     writeln(newID, '\t', word);
> >             }
> >     }
> >     //writeln(dictionary.length);
> > }
> >
> >
> > This is the error:
> > dictionary.d:12: Error: associative arrays can only be assigned values
> with
> > immutable keys, not char[]
> >
> > If i use immutable keys, it works, but it defeats the purpose.  So what's wrong with the code?
>
> It works for DMD, I think it's a GDC bug (i'm new in D too, so i might be wrong). Keep in mind that GDC implements only D 1.0 and book has D 2.0 code.
>
> Sincerely,
> Mariusz Gliwiński
>

Friday 24 December 2010 @ 18:36:08 Caligo:
> I forgot to ask, what version of DMD are you using?

2.049