[Stefan]

Conditionals
The character ‘?’ begins a conditional expression, the general form is:
?Ntrue-expression:false-expression
where N is decimal digit.
If sub-expression N was matched, then true-expression is evaluated and sent to output,
otherwise false-expression is evaluated and sent to output.
You will normally need to surround a conditional-expression with parenthesis in order to prevent ambiguities.
For example, the format string “(?1foo:bar)” will replace each match found with “foo” if the sub-expression $1 was matched,
and with “bar” otherwise.
For sub-expressions with an index greater than 9, or for access to named sub-expressions use:
?{INDEX}true-expression:false-expression
or
?{NAME}true-expression:false-expression

conditional expression ?Ntrue-expression:false-expression

In addition, conditional expressions of the following form are recognized:
?Ntrue-expression:false-expression
where N is a decimal digit representing a sub-match.
If the corresponding sub-match participated in the full match, then the substitution is true-expression.
Otherwise, it is false-expression. In this mode, you can use parens () for grouping.
If you want a literal paren, you must escape it as (.

Seams clear, but i have still problems using this.
Some tests:

	conditional expression 

	'?Ntrue-expression:false-expression' test 1

	

	I have:

	Test Price 1000

	Test Price 100

	Test Price 800

	---

	Find: (.+) (.+) (d{3})(d)

	Replace: (?4: too expensive: affordable)

	[X] Use RegEx

	---

	Result:

	Test Price 1000 too expensive

	Test Price 100

	Test Price 800

	---

	Expected:

	Test Price 1000 too expensive

	Test Price 100 affordable

	Test Price 800 affordable

	---

	Explanation: 

	If sub-expression No. 4 match THEN 

	use 'true-expression' 

	else 'false-expression'

	

	conditional expression 

	'?Ntrue-expression:false-expression' test 2

	

	I have:

	Color 1 green

	Color 2 blue

	Color 3 red

	The available colors are either green, blue or red.

	---

	Find: (Color d) (.+)

	Replace: (?1:1 2-ich:1 -2-)

	[X] Use RegEx

	---

	Result:

	Color 1 green-ich

	Color 2 blue-ich

	Color 3 red-ich

	The available colors are either green, blue or red.

	---

	Expected:

	Color 1 green-ich

	Color 2 blue-ich

	Color 3 red-ich

	The available colors are either -green-, -blue- or -red-.

	---

	Explanation: 

	Only if sub-expression No. 1 will match THEN

	use 'true-expression'

	else 'false-expression'

	

OK, i will test some more.