finish helper functions

src/phonenumberutil/mod.rs

@@ -0,0 +1,24 @@
+mod helper_constants;
+pub mod helper_functions;
+mod enums;
+mod phonenumberutil;
+mod regex_and_mappings;
+
+pub use enums::{MatchType, PhoneNumberFormat, PhoneNumberType, ValidationResultErr, ValidNumberLenType};
+use thiserror::Error;
+
+#[derive(Debug, Error)]
+pub enum ErrorType {
+    #[error("No parsing")]
+    NoParsingError,
+    #[error("Invalid country code")]
+    InvalidCountryCodeError, // INVALID_COUNTRY_CODE in the java version.
+    #[error("Not a number")]
+    NotANumber,
+    #[error("Too short after idd")]
+    TooShortAfterIdd,
+    #[error("Too short Nsn")]
+    TooShortNsn,
+    #[error("Too long nsn")]
+    TooLongNsn, // TOO_LONG in the java version.
+}