Comprehensive and Detailed Explanation from Exact Extract:

In ABAP Cloud, string functions that support regular expressions (PCRE) include:

match( ) → returns the first substring matching the regex.

matches( ) → checks if the whole string matches the regex.

find( ) → finds a substring based on regex pattern.

Functions such as reverse( ) and condense( ) do not support regex patterns; they are purely string manipulation utilities.

Verified Study Guide Reference: ABAP Keyword Documentation – String Functions with Regular Expressions.