On Thursday, 31 July 2014 at 10:22:28 UTC, Marc Schütz wrote:
On Thursday, 31 July 2014 at 02:03:37 UTC, Puming wrote:
1. Are AAs reference type? if so, why does the compiler copy
it?
This is probably your problem. They are reference types, but
initially that reference is `null`. When you write:
auto cmds = CONFIG.commands;
`cmds` contains a copy of the `null` value. On assignment, the
actual AA is created, and assigned to `cmds`, but not back to
`CONFIG.commands`. Try initializing the AA in your class
constructor.
I checked the code and could concur your suggestion.
What I found strange were:
1. The only way that I can initialize it is to assign a value.
But I want to initialize an empty AA, is that possible?
2. CONFIG.commands is not `null` before initialized, it is
'[]'(when I writeln it). But it still behave like what you
described (except that it won't produce an NullPointer Exception.
