Add replace(proc(string): string)

README.asciidoc

@@ -74,6 +74,9 @@ Replaces each match of Regex in the string with `sub`.
 If `sub` is a `proc (RegexMatch): string`, then it is executed with each match
 and the return value is the replacement value.
 
+If `sub` is a `proc (string): string`, then it is executed with the full text
+of the match and and the return value is the replacement value.
+
 If `sub` is a string, the syntax is as follows:
 
 - `$$` - literal `$`

src/nre.nim

@@ -445,6 +445,10 @@ proc replace*(str: string, pattern: Regex,
               subproc: proc (match: RegexMatch): string): string =
   replaceImpl(str, pattern, subproc(match))
 
+proc replace*(str: string, pattern: Regex,
+              subproc: proc (match: string): string): string =
+  replaceImpl(str, pattern, subproc(match.match))
+
 proc replace*(str: string, pattern: Regex, sub: string): string =
   # - 1 because the string numbers are 0-indexed
   replaceImpl(str, pattern,