grauzone wrote:
bearophile wrote:
switch (arg) {
case("-s") {
try {
next_arg = iargs.next();
size = toInt(args[idx++]);
} catch (...) {
throw new Exception("...");
}
}
case("-m") {
printMessages = true;
}
case("-p") // just 1 istruction, no {} needed
printResults = true;
case("-h"); // semicolon isn't allowed here
showUsage();
default { // default case may need some care
throw new Exception("...");
}
}
You can do something like this:
void main(string[] args) {
auto t = ["-s"[]: { writefln("handle argument -s"); },
"-m": { writefln("handle argument -m"); }];
if (auto pcode = args[1] in t) {
(*pcode)();
} else {
//default case
}
}
Even the ugly and unneeded case labels are gone!
If you don't mind your ulta-modern switch-case to allocate memory when
it's used.
If you still don't like it, you can do some ugly mixin() and CTFE stuff.
Nobody will mind because that's modern D style.
import std.getopt;
void main(string[] args) {
getopt(args,
"s", { writefln("handle argument -s"); },
"-m", { writefln("handle argument -m"); });
...
}
Andrei
