Added an enum for Country

src/main.rs

@@ -4,12 +4,25 @@ use rust_decimal::Decimal;
 use std::error::Error;
 use std::io;
 use std::path::Path;
-use std::process;
 use std::str::FromStr;
 use serde::{Deserialize, Serialize};
 use serde;
 use serde_repr::*;
 
+#[derive(Serialize, Deserialize, Debug, Clone)]
+enum Country {
+    England,
+    Scotland,
+    Wales,
+    NorthernIreland,
+
+    #[serde(rename="Isle of Man")]
+    IsleOfMan,
+
+    #[serde(rename="Channel Islands")]
+    ChannelIslands,
+}
+
 #[derive(Serialize, Deserialize, Debug)]
 #[serde(rename_all = "lowercase")]
 enum Status {
@@ -56,7 +69,7 @@ struct Postcode {
     #[serde(deserialize_with = "csv::invalid_option")]
     northing: Option<u32>,
     positional_quality_indicator: PositionalQuality,
-    country: String,
+    country: Country,
     latitude: Option<String>,
     longitude: Option<String>,
     postcode_no_space: String,
@@ -75,7 +88,7 @@ struct SmolPostcode {
     status: Status,
     usertype: UserType,
     positional_quality_indicator: PositionalQuality,
-    country: String,
+    country: Country,
     latitude: Option<Decimal>,
     longitude: Option<Decimal>,
 }