Function validate 

pub fn validate(input: &str) -> Result<(), ValidationError>

Validates an Ecuadorian RUC (Registro Único de Contribuyentes).

Arguments

• input - A string containing the RUC number (13 digits).

Errors

Returns ValidationError on validation failure:

• ValidationError::InvalidLength - Not exactly 13 digits
• ValidationError::InvalidFormat - Non-numeric or invalid RUC type digit
• ValidationError::InvalidProvinceCode - Province code not in 01-24
• ValidationError::InvalidCheckDigit - Check digit invalid

Examples

use ec_validator::ruc;

// Natural person RUC (3rd digit 0-5)
let result = ruc::validate("1713175071001");
assert!(result.is_ok());

// Juridical entity RUC (3rd digit 9)
let result = ruc::validate("1790085783001");
assert!(result.is_ok());

// Public entity RUC (3rd digit 6)
let result = ruc::validate("1760001550001");
assert!(result.is_ok());