Add some phonenumberutil functions

src/phonenumberutil/errors.rs

@@ -1,3 +1,6 @@
+use core::error;
+use std::num::ParseIntError;
+
 use thiserror::Error;
 
 use crate::regexp_cache::ErrorInvalidRegex;
@@ -5,5 +8,38 @@ use crate::regexp_cache::ErrorInvalidRegex;
 #[derive(Debug, PartialEq, Error)]
 pub enum PhoneNumberUtilError {
     #[error("{0}")]
-    InvalidRegexError(#[from] ErrorInvalidRegex)
-}
+    InvalidRegexError(#[from] ErrorInvalidRegex),
+    #[error("Parse error: {0}")]
+    ParseError(#[from] ParseError),
+    #[error("Extract number error: {0}")]
+    ExtractNumberError(#[from] ExtractNumberError)
+}   
+
+#[derive(Debug, PartialEq, Error)]
+pub enum ParseError {
+    // Removed as OK variant
+    // 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.
+    #[error("{0}")]
+    InvalidRegexError(#[from] ErrorInvalidRegex),
+    #[error("{0}")]
+    ParseNumberAsIntError(#[from] ParseIntError)
+}
+
+#[derive(Debug, PartialEq, Error)]
+pub enum ExtractNumberError {
+    #[error("No valid start character found")]
+    NoValidStartCharacter,
+    #[error("Invalid number")]
+    NotANumber,
+}
+