Autor: Philip Hazel Data: A: ND CC: Pcre-dev Assumpte: Re: [pcre-dev] Recursion with possessive quantifiers
On Sat, 12 Feb 2011, ND wrote:
> When a possessive quantifier applyed to expression for example
> (?:<EXPR>)*+
> then recursion occurs and its value is equal to the number of sequential
> <EXPR> in input string.
> Why recurtion is so big? It seems there is no need to keep all
> intermediate backtrack points because PCRE have no possibility to return
> to them. Perhaps PCRE need to keep only one last point for backtracking to
> it if following peace of input string don't match <EXPR>.
>
> May be this is a way for optimization?
