Hello.  How do you declare and initialize a map that looks like the following:

Name => [ Personal Info]

Where personal info is type string[string].

I can't get this to compile.  I'm wondering what I am doing wrong:

import std.stdio;


void main() {
  int[string] helloworld = [ "Hello":0, "World":1 ];



  foreach( k,v;helloworld) {
    writefln( "%s -> %s", k, v);
  }


  writefln( "helloworld type: %s", typeid(helloworld));


  string[string] table = [ "City":"Boston", "Title":"Vice President" ];

  foreach( k, v; table) {
    writefln( "%s: %s", k, v);
  }

  // Here's the problem:
  string[string[string]] leaders = [ "Obama":["City":"DC", "Title":"ThePrez"],
				    "Cameron":["City":"London", "Title":"DaPrimeMinista"]];

  foreach( k, v; leaders) {
    writefln( "first foreach type: %s", typeid(v));
    writefln( "Person: %s", k);
    foreach( kk, vv; v) {
      writefln( "\t%s\t%s", kk, vv);
    }
  }

  return;
}



Here's the output:


$ dmd AssocArray.d
AssocArray.d(25): Error: Integer constant expression expected instead of "City"
AssocArray.d(25): Error: Integer constant expression expected instead of "Title"
AssocArray.d(25): Error: Integer constant expression expected instead of "City"
AssocArray.d(25): Error: Integer constant expression expected instead of "Title"
AssocArray.d(24): Error: not an associative array initializer




$ dmd --help
Digital Mars D Compiler v2.047
Copyright (c) 1999-2010 by Digital Mars written by Walter Bright
Documentation: http://www.digitalmars.com/d/2.0/index.html




thanks

dcoder

Am 13.08.2010 01:17, schrieb dcoder:

string[string][string] leaders

or try using alias to "see" the light

alias string[string] city_info;

city_info[string] leaders;

> Hello.  How do you declare and initialize a map that looks like the following:
>
> Name =>  [ Personal Info]
>
> Where personal info is type string[string].
>
> I can't get this to compile.  I'm wondering what I am doing wrong:
>
> import std.stdio;
>
>
> void main() {
>    int[string] helloworld = [ "Hello":0, "World":1 ];
>
>
>
>    foreach( k,v;helloworld) {
>      writefln( "%s ->  %s", k, v);
>    }
>
>
>    writefln( "helloworld type: %s", typeid(helloworld));
>
>
>    string[string] table = [ "City":"Boston", "Title":"Vice President" ];
>
>    foreach( k, v; table) {
>      writefln( "%s: %s", k, v);
>    }
>
>    // Here's the problem:
>    string[string[string]] leaders = [ "Obama":["City":"DC", "Title":"ThePrez"],
> 				    "Cameron":["City":"London", "Title":"DaPrimeMinista"]];
>
>    foreach( k, v; leaders) {
>      writefln( "first foreach type: %s", typeid(v));
>      writefln( "Person: %s", k);
>      foreach( kk, vv; v) {
>        writefln( "\t%s\t%s", kk, vv);
>      }
>    }
>
>    return;
> }
>
>
>
> Here's the output:
>
>
> $ dmd AssocArray.d
> AssocArray.d(25): Error: Integer constant expression expected instead of "City"
> AssocArray.d(25): Error: Integer constant expression expected instead of "Title"
> AssocArray.d(25): Error: Integer constant expression expected instead of "City"
> AssocArray.d(25): Error: Integer constant expression expected instead of "Title"
> AssocArray.d(24): Error: not an associative array initializer
>
>
>
>
> $ dmd --help
> Digital Mars D Compiler v2.047
> Copyright (c) 1999-2010 by Digital Mars written by Walter Bright
> Documentation: http://www.digitalmars.com/d/2.0/index.html
>
>
>
>
> thanks
>
> dcoder

== Quote from dennis luehring (dl.soluz@gmx.net)'s article
> Am 13.08.2010 01:17, schrieb dcoder:
> string[string][string] leaders
> or try using alias to "see" the light
> alias string[string] city_info;
> city_info[string] leaders;

Ah, thanks.

string[string[string]] maps type string[string] as key to string, which is the reverse of what I want.  I want to map string to string[string].

So, anyways, I did make the change, but my initialization still doesn't work.  I get the same errors:


$ dmd AssocArray.d
AssocArray.d(25): Error: Integer constant expression expected instead of "City"
AssocArray.d(25): Error: Integer constant expression expected instead of "Title"
AssocArray.d(25): Error: Integer constant expression expected instead of "City"
AssocArray.d(25): Error: Integer constant expression expected instead of "Title"
AssocArray.d(24): Error: not an associative array initializer


Why?  And why would I get the same kind of error?

thanks.




> > Hello.  How do you declare and initialize a map that looks like the following:
> >
> > Name =>  [ Personal Info]
> >
> > Where personal info is type string[string].
> >
> > I can't get this to compile.  I'm wondering what I am doing wrong:
> >
> > import std.stdio;
> >
> >
> > void main() {
> >    int[string] helloworld = [ "Hello":0, "World":1 ];
> >
> >
> >
> >    foreach( k,v;helloworld) {
> >      writefln( "%s ->  %s", k, v);
> >    }
> >
> >
> >    writefln( "helloworld type: %s", typeid(helloworld));
> >
> >
> >    string[string] table = [ "City":"Boston", "Title":"Vice President" ];
> >
> >    foreach( k, v; table) {
> >      writefln( "%s: %s", k, v);
> >    }
> >
> >    // Here's the problem:
> >    string[string[string]] leaders = [ "Obama":["City":"DC", "Title":"ThePrez"],
> > 				    "Cameron":["City":"London", "Title":"DaPrimeMinista"]];
> >
> >    foreach( k, v; leaders) {
> >      writefln( "first foreach type: %s", typeid(v));
> >      writefln( "Person: %s", k);
> >      foreach( kk, vv; v) {
> >        writefln( "\t%s\t%s", kk, vv);
> >      }
> >    }
> >
> >    return;
> > }
> >
> >
> >
> > Here's the output:
> >
> >
> > $ dmd AssocArray.d
> > AssocArray.d(25): Error: Integer constant expression expected instead of "City"
> > AssocArray.d(25): Error: Integer constant expression expected instead of "Title"
> > AssocArray.d(25): Error: Integer constant expression expected instead of "City"
> > AssocArray.d(25): Error: Integer constant expression expected instead of "Title"
> > AssocArray.d(24): Error: not an associative array initializer
> >
> >
> >
> >
> > $ dmd --help
> > Digital Mars D Compiler v2.047
> > Copyright (c) 1999-2010 by Digital Mars written by Walter Bright
> > Documentation: http://www.digitalmars.com/d/2.0/index.html
> >
> >
> >
> >
> > thanks
> >
> > dcoder

On 08/13/2010 01:17 AM, dcoder wrote:
> Hello.  How do you declare and initialize a map that looks like the following:
>
> Name =>  [ Personal Info]
>
> Where personal info is type string[string].
>
> I can't get this to compile.  I'm wondering what I am doing wrong:
>
> import std.stdio;
>
>
> void main() {
>    int[string] helloworld = [ "Hello":0, "World":1 ];
>
>
>
>    foreach( k,v;helloworld) {
>      writefln( "%s ->  %s", k, v);
>    }
>
>
>    writefln( "helloworld type: %s", typeid(helloworld));
>
>
>    string[string] table = [ "City":"Boston", "Title":"Vice President" ];
>
>    foreach( k, v; table) {
>      writefln( "%s: %s", k, v);
>    }
>
>    // Here's the problem:
>    string[string[string]] leaders = [ "Obama":["City":"DC", "Title":"ThePrez"],
> 				    "Cameron":["City":"London", "Title":"DaPrimeMinista"]];
>
>    foreach( k, v; leaders) {
>      writefln( "first foreach type: %s", typeid(v));
>      writefln( "Person: %s", k);
>      foreach( kk, vv; v) {
>        writefln( "\t%s\t%s", kk, vv);
>      }
>    }
>
>    return;
> }
>
>
>
> Here's the output:
>
>
> $ dmd AssocArray.d
> AssocArray.d(25): Error: Integer constant expression expected instead of "City"
> AssocArray.d(25): Error: Integer constant expression expected instead of "Title"
> AssocArray.d(25): Error: Integer constant expression expected instead of "City"
> AssocArray.d(25): Error: Integer constant expression expected instead of "Title"
> AssocArray.d(24): Error: not an associative array initializer
>
>
>
>
> $ dmd --help
> Digital Mars D Compiler v2.047
> Copyright (c) 1999-2010 by Digital Mars written by Walter Bright
> Documentation: http://www.digitalmars.com/d/2.0/index.html
>
>
>
>
> thanks
>
> dcoder

This is probably a bug, I think I have run into it.

Try this:

string[string[string]] leaders;
leaders["Obama"] = ["City":"DC", "Title":"ThePrez"];
leaders["Cameron"] =  ["City":"London", "Title":"DaPrimeMinista"];

And if that doesn't work, try unfolding more :-)

Probably should report this as a bug, as well.