fetch_named_pos

Description:

public bool fetch_named_pos (string name, out int start_pos, out int end_pos)

Retrieves the position in bytes of the capturing parentheses named name.

If name is a valid sub pattern name but it didn't match anything (e.g. sub pattern "X", matching "b" against "(?P<X>a) ?b") then start_pos and end_pos are set to -1 and true is returned.

Parameters:

this	MatchInfo structure
name	name of the subexpression
start_pos	pointer to location where to store the start position, or null
end_pos	pointer to location where to store the end position, or null

Returns:

true if the position was fetched, false otherwise. If the position cannot be fetched, start_pos and end_pos are left unchanged.