On Tue, 05 Oct 2010 15:08:39 +0400, Bob Cowdery <b...@bobcowdery.plus.com>
wrote:
On 05/10/2010 12:04, Denis Koroskin wrote:
On Tue, 05 Oct 2010 14:57:22 +0400, Bob Cowdery
<b...@bobcowdery.plus.com> wrote:
On 05/10/2010 11:45, Denis Koroskin wrote:
On Tue, 05 Oct 2010 14:23:47 +0400, Bob Cowdery
<b...@bobcowdery.plus.com> wrote:
I can't seem to get any sense out of associative arrays. Even the
simplest definition won't compile so I must be doing something daft.
int[string] aa = ["hello":42];
Error: non-constant expression ["hello":42]
What exactly is not constant about this. The example is straight
out the
book. Using D 2.0.
bob
What exactly compiler version are you using (run dmd with no args)?
Works perfectly fine here (dmd2.049).
It says 2.049. How odd. I've got a fair amount of code and everything
else compiles fine.
Can you please post complete code snippet that fails to compile?
Here is the code I used to test:
module aa;
import std.stdio;
void main()
{
int[string] aa = ["hello":42];
writeln(aa["hello"]);
}
# dmd -run aa.d
Ah! It's some other code below it that is not giving an error but
causing the error above. So the compiler is getting confused. What I was
actually trying to do was create an associative array with a string as a
key and a Tuple as the value. Now
auto aa = [
"some string": (100.0, 6100.0)
]
compiles but is clearly wrong and gives rise to other errors. Does
anyone know the correct way to define this and then access the tuple.
import std.stdio;
import std.typecons;
void main()
{
auto aa = ["hello": tuple(100.0, 6100.0)];
auto result = aa["hello"];
writeln(result.field[0], " ", result._1); // primary and alternative way
}
