Regex Tester & Validator

This regex matches C-style function declarations or definitions, specifically looking for a return type (int, string, float, void), a function name, and parentheses containing parameters. Inside the parentheses, it can match empty parentheses for no parameters, or a comma-separated list of typed parameters (e.g., int x, float y). It is ideal for basic syntax validation in a compiler design or automata theory course.