Send empty assoc array to function

Steven Schveighoffer schveiguy at
Fri Jul 10 12:08:35 UTC 2020

On 7/10/20 4:15 AM, Max Samukha wrote:
> On Thursday, 9 July 2020 at 21:04:57 UTC, Steven Schveighoffer wrote:
>>> Why isn't [] accepted as an empty AA literal?
>> Because it's an empty dynamic array literal.
>> If D were to accept an empty AA literal, I'd expect it to be [:].
> Just as typeof(null) is a subtype of all nullable types, you could make 
> typeof([]) a subtype of both AAs and dynamic arrays. [:] could still be 
> made a specifically AA literal.

Sure it's possible. But I don't see it happening.

> BTW, writeln((int[int]).init) prints "[]" (to!string((V[K]).init) == 
> "[]"), but pragma(msg, (int[int]).init) - the more general 'null' 
> ((V[K]).init.stringof == "null"), which is a unfortunate inconsistency.

to!string is from the library, pragma(msg) is the compiler. The latter 
is authoratative where the compiler is concerned.

to!string probably should be changed. [] should be printed for 
initialized but empty AAs, null should be printed for .init.


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