On Thursday, 30 January 2014 at 11:19:33 UTC, Idan Arye wrote:
On Wednesday, 29 January 2014 at 22:16:57 UTC, Peter Alexander
wrote:
On Wednesday, 29 January 2014 at 21:18:06 UTC, Etienne wrote:
void exec(string command)(){
foreach(str ; choice.splitter(".")){
writeln(str);
}
}
I'd like to take the opportunity to say how much I'd love to
be able to do a static foreach rather than use recursion.
You can use TypeTuple for static foreach.
void foo(int x)()
{
import std.stdio;
writeln(x);
}
void main()
{
import std.typetuple;
foreach (x; TypeTuple!(1, 2, 3))
foo!x();
}
Notice that the loop variable x is used as a template
parameter at compile time. The code expands to:
foo!1();
foo!2();
foo!3();
Two problems:
1) You can't use `foreach` outside functions. That means that
you write:
struct Foo{
foreach(i;TypeTuple!(1,2,3)){
mixin("int num"~i.stringof~";");
}
}
2) `foreach` creates it's own scope. This won't work:
foreach(i; TypeTuple!(1,2,3)){
mixin("int num"~i.stringof~";");
}
num1=1;
num2=2;
num3=3;
writeln(num1,num2,num3);
1) You can use mixin(format("<Prolog>%(<Begin>%s<End>%)<Epilog>",
CompileTimeRange)); See std.format for ranges and
std.string.format.
2) no. This should work for compile time foreach and TypeTuples.
There are many examples in source code of Phobos.
