RegExp

[Sergey Gromov]

Wed, 15 Oct 2008 18:01:04 -0400,
DF wrote:
> /**
>  * RegExp test.
>  */
> import std.regexp;
> import std.stdio;
> 
> void main() {
> 	string someString = "Hello world!";
> 	auto regExp = new RegExp(r"[wW]orld");
> 	auto result = regExp.search(someString);
> 	//int k = regExp.test(someString);
> 	if (result is null) {
> 		writefln("Not found!");
> 	} else {
> 		writefln("Result:" ~ result[0]);
> 	}
> }
> 
> This code never writes the searched part, until we uncomment the line with test() method call, though there is a word matching the pattern. Why?

It shouldn't.  search() prepares the regexp for use in foreach loop.  The 
correct function for you is find:

import std.regexp;
import std.stdio;

void main() {
	string someString = "Hello world!";
	auto regExp = new RegExp(r"[wW]orld");
	auto result = regExp.find(someString);
	if (result == -1) {
		writefln("Not found!");
	} else {
		writefln("Result:" ~ regExp[0]);
	}
}