/**
 * Escape all regex metacharacters in a string so it can be used literally
 * inside a RegExp constructor. Used internally by the interpolation
 * engine to compile placeholder patterns from caller-supplied delimiters,
 * and exported as a standalone helper for consumers building their own
 * delimiter-aware patterns.
 */
export function escapeRegex(str: string): string {
    return str.replace(/[.*+?^${}()|[\]\\]/g, "\\$&");
}