consider this:
import std.conv, std.algorithm;
import core.vararg;
import std.stdio, std.regex;
void main()
{
string haystack = "ID : generateWorld;
Position : { &
{ID : \" absolute ; Coordinate : , NULL OMEGA;}
{ID : \" inclusion ; Coordinate : UNDEF;}
{ID : \" subarc; Coordinate : , NULL OMEGA; }
}; ID : ";
// thus, something like *{B}* can not end here,
// but something like X can start here.
string needle =
"(?<!(([.\n\r])*(\\{)([.\n\r])*))(ID(\\p{White_Space})*:(\\p{White_Space})*)(?!(([.\n\r])*(\\})([.\n\r])*))";
auto r = regex(needle, "g");
auto m = matchAll(haystack, r);
foreach (c; m)
writeln(c.hit);
}
So let us break up needle:
(
?<!
(
([.\n\r])*(\\{)([.\n\r])*
)
)
Do not match somthing, that may contain a "*{*" as a leading
match, * this time means any character, including \n and \r
(ID(\\p{White_Space})*:(\\p{White_Space})*)
however, look for the form : "ID" <few blank spaces> ":" < more
blank spaces>
(?!(([.\n\r])*(\\})([.\n\r])*))
but no trailing "*}*" as a trailing match.
In haystack, there are two such "ID :" -s. once at the beginning,
ID : generateWorld. and then the final, last ID
However, this is returning all 5 ID-s as match
what am I doing wrong?
