array of elements of various sybtypes

Andrej Mitrovic andrej.mitrovich at
Wed Jan 26 20:40:39 PST 2011

On 1/27/11, Steven Schveighoffer <schveiguy at> wrote:
>  I'm not sure why this works and the other doesn't, but we
> definitely need something that allows one to control the array type of a
> literal.

pragma helps in discovering what DMD does sometime. This will error
out but it will give some useful info:

pragma(msg, typeid( [1,2,cast(ubyte)3] ));
error: [1,2,cast(int)cast(ubyte)3] , &D11TypeInfo_Ai6__initZ

So it forces a cast back to int again.

But we can use a postfix to set an unsigned type for the whole array:

writeln(typeid( [1,2,3u] ));  // uint[]

And we can select a string type with a postfix, but we can't use a cast:

void main()
    writeln(typeid( ["a"d, "b", "c"] ));    // works
    writeln(typeid( [cast(dchar)"a", "b", "c"] ));  // doesn't work,
// Error: incompatible types for ((cast(dchar)"a") ? ("b")): 'dchar'
and 'string'

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