Double $

Support
1

What's going on here, then?

$regexp('$',(.*),$0) returns $$ rather than $ as I'd expect.

2

$regexp('^$',(.*),$0) gives ^$$

$regexp('^$',(.*),$1) gives ^$$

$regexp('^$',(.)(.),$1) gives ^$
$regexp('^$',(.)(.),$2) gives $$
$regexp('^$',(.)(.),$1$2) gives ^$$
$regexp('^$',(.)(.),$1-$2) gives ^-$$

$regexp('^$',(.*),$-1) gives $-1$-1

DD.20071127.0118.CET