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digitalmars.D - void[0][string] hash = [ "text" : [] ] gives empty array.

reply "Cooler" <kulkin hotbox.ru> writes:
The code compiled and runs successfully:
   void[0][string] hash = [ "text" : [] ];
   writeln(hash);
   assert(hash.length == 0);

Output result is "[]".

Is that a bug?
Feb 06 2014
next sibling parent "Maxim Fomin" <maxim maxim-fomin.ru> writes:
On Thursday, 6 February 2014 at 21:37:34 UTC, Cooler wrote:
 The code compiled and runs successfully:
   void[0][string] hash = [ "text" : [] ];
   writeln(hash);
   assert(hash.length == 0);

 Output result is "[]".

 Is that a bug?

http://dlang.org/arrays.html A static array with a dimension of 0 is allowed, but no space is allocated for it. It's useful as the last member of a variable length struct, or as the degenerate case of a template expansion. Judging by compler output, zero size static arrays are removed completely, so no surprise that nothing is done.
Feb 06 2014
prev sibling parent "ed" <growlercab gmail.com> writes:
On Friday, 7 February 2014 at 03:33:10 UTC, Maxim Fomin wrote:
 On Thursday, 6 February 2014 at 21:37:34 UTC, Cooler wrote:
 The code compiled and runs successfully:
  void[0][string] hash = [ "text" : [] ];
  writeln(hash);
  assert(hash.length == 0);

 Output result is "[]".

 Is that a bug?

http://dlang.org/arrays.html A static array with a dimension of 0 is allowed, but no space is allocated for it. It's useful as the last member of a variable length struct, or as the degenerate case of a template expansion. Judging by compler output, zero size static arrays are removed completely, so no surprise that nothing is done.

This should be a compiler error, no? void[0], OK void[0][], ERROR Cheers, ed
Feb 06 2014