Regex Tester & Validator

This regular expression is designed to match and capture function-like strings, extracting the function name and its inner content. It uses named capture groups, "name" and "content", to isolate the identifier and the arguments within the parentheses. It includes an attempt to handle multiline arguments using Java's \R linebreak matcher, though it may be limited to single newlines depending on the exact structure. It is typically used for parsing code, log files, or simple template syntaxes.