wtregex_side_effect_conversion_impl
===================================

Similar to wtregex\_side\_effect\_conversion_impl, except both input and output 
are
wtstring\_patterns.  The weight of the appended side-effect is the average of 
the
weights of the contributing elements in the input.

add
===

	some_rc add search replace append

Appends a new rule to the list in `some_rc`; the new rule has `search` as
the element sought, `replace` as the element that replaces it and `append`
 as the side effect on the output.  `search` may contain regular expression
elements (as implemented by boost) and `replace` and `append` may contain
elements like `\1` to refer to parenthesised expressions in `search`.

remove
======

	some_rc remove search replace append 

Removes the rule mapping `search` to `replace` with side effect `append` in
the rule list of `some_rc`.

list
====

	some_rc list

Emit the list of rules for `some_rc`.