Hi, Currently I'm using Boost.Xpressive to search a string for variables that will be replaced by localized utf-8 encoded strings, in the format of $(variable_name). Because of this, I don't think I can simply use regex_replace(), since it takes a common regex that will be used to replace all matches, when in my case each match requires a special, unique replacement. Is there a way of doing this using Boost.Xpressive, or do I need to use a different component in the boost library? Is there a Xpressive 'replace' function that takes a functor, perhaps, and for each match it calls the function object and replaces the match with the return value of the functor? An example of a string that I'll be searching is below: "This string $(variable1) has localized $(var2) text interleaved for no $(reason)" In the string above, we have 3 variables. Each variable will reference a string in a localization table, which will then be used to replace the variable itself. Any help is greatly appreciated. Thanks.