On Tue, 25 Oct 2011 06:31:13 -0400, Piotr Szturmaj <bncr...@jadamspam.pl> wrote:
Gor Gyolchanyan wrote:
I think adding more dynamic typing to D would be a splendid idea to
further widen the variety of solutions for different problems.
Modular app development is a very good practice and modularity means
dynamicity, which in turn means, that one needs to give up on lots of
sweet stuff like templates, overloading and string mixins.
Variant is the first step towards dynamic alter-ego of D, which is
completely undeveloped currently.
If Algebraic/Variant could be recognized by the language it would give
some interesting possibilities, like Variant array literals:
auto array = [10, 2.0, "abc"];
types it as Algebraic!(int, double, string)[];
auto AA = [ "a" : 10, "b" : 2.0, 3 : "abc" ];
types it as Algebraic!(int, double, string)[Algebraic!(string, int)];
for example, that may be used to express JSON structures with literals only:
int x, y;
auto json = [
"x" : x,
"y" : y,
"colors" : [
[
r : 255,
g : 0,
b : 0
],
[
r : 0,
g : 0,
b : 255
]
]
]
Why do we need language support? This works in my variant proposal:
auto json = Variant(
"x",x,
"y",y,
"colors", [[
"r":255,
"g":0,
"b":0],[
"r":0,
"g":0,
"b":255]
]
);
Granted if ["r":255,"g":0,"b":0] weren't all int, it would have to be declared
Variant("r",255,"g",0,"b",0), but we could always shorten Variant to var or something.
