id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
3389	Replacement format operator to substitute sequential numbers	Keith MacDonald <keith@…>	John Maddock	"I'd like to suggest an enhancement to the Boost-Extended format string syntax.  Its syntax is one of:

{{{
\i
\i(n)
}}}

The former substitutes sequential numbers, starting at 1, while the (n) modifier starts the sequence at value <n>.  For example, given this text:

{{{
#define FOO 52
#define BAR 53
}}}

Searching for ""[0-9]+"" and replacing with ""\i(100)"" would result in:

{{{
#define FOO 100
#define BAR 101
}}}

Each \i in the replacement format is treated independently, so searching for "". ."" in the following text:

{{{
a b
c d
}}}

and replacing it with ""\i \i(20)"" would result in:

{{{
1 20
2 21
}}}

A useful variation would be the ability to specify the field width required, perhaps using ""\i(n,w)"", for leading spaces, and ""\i(n,0w)"" for leading zeroes.

Thanks
"	Feature Requests	closed	Boost 1.41.0	regex	Boost 1.40.0	Not Applicable	wontfix	regex format syntax