• bobef (8/8) May 11 2005 Are multidimensional AAs possible?
• Burton Radons (11/22) May 11 2005 Read declarations from right to left. That is an associative uint array...

bobef <bobef_member pathlink.com> writes:

Are multidimensional AAs possible?

I have this:

byte[char[]][uint] m_on;

then when I say m_on["char"][13]=1;
dmd says that ot can't convert "char" to uint and 13 to char[]...
so I switch them and it compiles but it is supposed to work at all
and is this the way it should work?
(in my case I use variables of couse not "char" && 13)

Burton Radons <burton-radons smocky.com> writes:

bobef wrote:

 Are multidimensional AAs possible?
 
 I have this:
 
 byte[char[]][uint] m_on;
 
 then when I say m_on["char"][13]=1;
 dmd says that ot can't convert "char" to uint and 13 to char[]...
 so I switch them and it compiles but it is supposed to work at all
 and is this the way it should work?
 (in my case I use variables of couse not "char" && 13)

Read declarations from right to left.  That is an associative uint array 
of associative string arrays of bytes.  So this would work instead:

     m_on[13]["char"]=1;

This change was done some years back because the old declaration method 
was both right-to-left and left-to-right, leading to C's unreadable 
complex declarations, and particularly how confusing it was when you 
would break down a complex type into a series of typedefs.

It's a thirty-year-old mistake (types should be on the right and read 
left-to-right) and we can't entirely fix it without breaking C 
declaration compatibility altogether.