typedef, Typedef

[bearophile]

The problem with "T[] a2 = [1, 2, 3];" was reported here:
http://d.puremagic.com/issues/show_bug.cgi?id=8864

And it was discussed a bit here:
http://forum.dlang.org/thread/tyrleoromnxjhvfodmbe@forum.dlang.org

-----------------------

Other problems with Typedef:

http://d.puremagic.com/issues/show_bug.cgi?id=7777


import std.typecons: Typedef;
alias V3 = Typedef!(double[3]);
V3 v1 = [30, 30, -50]; // error
V3 v2 = V3([30, 30, -50]); // OK
void main() {
     V3 v3 = [30, 30, -50]; // OK
     V3 v4 = V3([30, 30, -50]); // OK
}

-----------------------

http://d.puremagic.com/issues/show_bug.cgi?id=9363

import std.typecons: Typedef;
alias Typedef!(ubyte[]) MyArray;
void main() {
     MyArray arr;
     arr.length = 10;
     arr[] = 0; // error
}

-----------------------

http://d.puremagic.com/issues/show_bug.cgi?id=10778

This works:

alias Matrix = double[260][260];
typedef Matrix Foo;
void main() {
     Foo m;
}


This fails:

import std.typecons: Typedef;
alias Matrix = double[260][260];
alias Foo = Typedef!Matrix; // template recursive expansion error
void main() {}

-----------------------

Plus a const-related issue that seems simpler to fix:
http://d.puremagic.com/issues/show_bug.cgi?id=7737
http://d.puremagic.com/issues/show_bug.cgi?id=11584

Bye,
bearophile