On Tuesday, 25 February 2014 at 12:57:51 UTC, Dejan Lekic wrote:
On Tuesday, 25 February 2014 at 12:45:06 UTC, Cherry wrote:
Hello
I want to define an enum int, but I want to make it possible
to set its value when I run dmd from the command line. Is it
possible in D?
Regards
Cherry
D offers version blocks: http://dlang.org/version.html#version
It would be great if D compiler had a way to substitute enums
with given values. (This is a nice candidate for a DIP)
Imagine you have a code like this:
module myproggy;
import std.stdio;
enum foo = 5;
enum bar = "walter";
int main() {
writeln(bar);
return foo;
}
... and you call compiler like:
dmd myproggy.d -Dfoo=42 -Dbar=hello
smart, new D compiler would replace enums (iff they exist in
the source code) with the given arguments, so when you run
myproggy, you get "walter" as output, and the exit code is 42.
And yes, if someone builds multiple modules, he/she would have to
use fully-qualified name. Example: dmd foo.d bar.d -Dfoo.var1=5
-Dbar.var4=walter
