gistfile1.d

//Code:
import std.regex;
import std.stdio : writefln;

int main(string[] args)
{
	string tomatch = "a!b@c";
	version(Static)
	{
		static auto r = regex(r"^(?P<nick>.*?)!(?P<ident>.*?)@(?P<host>.*?)$");
	} else {
		auto r = regex(r"^(?P<nick>.*?)!(?P<ident>.*?)@(?P<host>.*?)$");
	}

	auto nm = match(tomatch, r);
	assert(nm);

	auto c = nm.captures;

	writefln("c[1]      = %s", c[1]);
	writefln("c[\"nick\"] = %s", c["nick"]);

	return 0;
}

/* Results:
 * $ dmd -run regex.d
 * c[1]      = a
 * c["nick"] = a

 * $ dmd -version=Static -run regex.d
 * c[1]      = a
 * core.exception.RangeError@std.regex(2145): Range violation
 * ----------------
 * regex(_d_array_bounds+0x16) [0x80c9746]
 * regex() [0x80ce916]
 * regex(@trusted uint std.regex.lookupNamedGroup!(immutable(char)[]).lookupNamedGroup(std.regex.NamedGroup[], immutable(char)[])+0x5a) [0x80c5002]
 * regex(@trusted immutable(char)[] std.regex.Captures!(immutable(char)[], uint).Captures.opIndex!(immutable(char)[]).opIndex(immutable(char)[])+0x48) [0x80c4f20]
 * regex(_Dmain+0xa5) [0x809ef79]
 * regex(extern (C) int rt.dmain2.main(int, char**).void runMain()+0x14) [0x80c9d20]
 * regex(extern (C) int rt.dmain2.main(int, char**).void tryExec(scope void delegate())+0x18) [0x80c9830]
 * regex(extern (C) int rt.dmain2.main(int, char**).void runAll()+0x32) [0x80c9d62]
 * regex(extern (C) int rt.dmain2.main(int, char**).void tryExec(scope void delegate())+0x18) [0x80c9830]
 * regex(main+0x94) [0x80c97e4]
 * /lib/i386-linux-gnu/libc.so.6(__libc_start_main+0xf3) [0xb75c94d3]
 * ----------------
 */