> # remove outermost pair of braces: abcd(x+(y-z))efgh --> abcdx+(y-z)efgh > [ no idea :-( ]
this is made simple since * is "greedy": Edit s:\((.*)\):\1:g On Fri Jan 11 06:45:39 EST 2013, [email protected] wrote: > On 11 January 2013 12:19, Peter A. Cejchan <[email protected]> wrote: > > # remove outermost pair of braces: abcd(x+(y-z))efgh --> abcdx+(y-z)efgh > > This, I believe, can't be achieved only with regexps. I'd write a > small external program and use it as a filter. > > > # prefix to postfix operator: ++i --> i++ > > [ Edit s/\+\+[a-zA-Z]+[0-9a-zA-Z]*/&++/ Edit s/\+\+/d] > > using the \1 (used to be undocumented on plan9) may be sometimes easier > Edit s/\+\+([A-Za-z]+[A-Za-z0-9])*/\1++/ should be "Edit s/\+\+([A-Za-z]+[A-Za-z0-9]*)/\1++/" ideally one should include _ and ¡-�. - erik
