resolve issue: \Zx where x is any escape sequence

Signed-off-by: Suraj Aralihalli <[email protected]>

docs/compatibility.md

@@ -490,8 +490,10 @@ The following regular expression patterns are not yet supported on the GPU and w
 - Line anchors `^` and `$` are not supported in some contexts, such as when combined with a choice (`^|a` or `$|a`).
 - String anchor `\Z` is not supported by `regexp_replace`, and in some rare contexts.
 - String anchor `\z` is not supported.
-- Patterns containing an end of line or string anchor immediately next to a newline or repetition that produces zero
+- Patterns containing an end-of-line or string anchor immediately next to a newline or repetition that produces zero
   or more results
+- Patterns containing end-of-line anchors like `$` or `\Z` immediately followed by 
+  escape sequences (e.g., `\w`, `\b`) are not supported.
 - Line anchor `$` and string anchors `\Z` are not supported in patterns containing `\W` or `\D`
 - Line and string anchors are not supported by `string_split` and `str_to_map`
 - Lazy quantifiers within a choice block such as `(2|\u2029??)+` 

sql-plugin/src/main/scala/com/nvidia/spark/rapids/RegexParser.scala

@@ -1395,9 +1395,10 @@ class CudfRegexTranspiler(mode: RegexMode) {
                     // however, cudf doesn't support negative look ahead
                     throw new RegexUnsupportedException("Regex sequence $\\z is not supported",
                       part.position)
-                  case RegexEscaped(a) if "bB".contains(a) =>
+                  case RegexEscaped(a) if "bBsSdDwWaAf".contains(a) =>
                     throw new RegexUnsupportedException(
-                      "Regex sequences with \\b or \\B not supported around $", part.position)
+                      s"Regex sequences with \\$a are not supported around end-of-line markers " +
+                        "like $ or \\Z at position", part.position)
                   case _ =>
                     r.append(rewrite(part, replacement, last, flags))
                 }