Re: When are associative arrays meant to throw a RangeError?

[Timon Gehr]

On 02/19/2012 12:40 AM, Andrej Mitrovic wrote:

On 2/19/12, Andrej Mitrovic<andrej.mitrov...@gmail.com>  wrote:

Chunk[] tempVar = chunks.get("CCCC", null) ~ new Chunk();

I've tried making a wrapper type that does this behind the scenes but
it won't work:

struct Hash(Key, Val)
{
     Val[Key] aa;

     Val opIndex(Key key)
     {
         return aa.get(key, Val.init);
     }

     alias aa this;
}

class Chunk { }
alias Hash!(string, Chunk) ChunkHash;

void main()
{
     ChunkHash chunks;
     Chunk[] tempVar = chunks["CCCC"] ~ new Chunk();
}

test.d(20): Error: incompatible types for ((chunks.opIndex("CCCC")) ~
(new Chunk)): 'test.Chunk' and 'test.Chunk'

Very odd..

The error is unrelated to your wrapper type.

static assert(!is(typeof(1~1)));

Concatenation only works if at least one of the types is an array.