//! Module for implementing built-in functions
//!
//! Provide the specific implementations of all built-in functions, organized by function category.
//!
//! Function registration is now performed directly through FunctionRegistry::register_all_builtin_functions.
//! Using a static distribution mechanism, the function is directly called via the BuiltinFunction enumeration.
// The macro module must be loaded first so that it can be used by other modules.