a bit more cleanup/refactoring

src/utils.rs

@@ -1,11 +1,20 @@
 use anyhow::Result;
-use std::fs;
+use std::{fs, str::FromStr};
 
-pub fn read_i64s(filename: &str) -> Result<Vec<i64>> {
-    Ok(read_file(filename)?
-        .lines()
-        .map(|s| s.parse::<i64>().expect("i64 parse error"))
-        .collect())
+pub fn read_data<T: FromStr>(filename: &str) -> Result<Vec<T>> {
+    parse_data(&read_file(filename)?)
+}
+
+pub fn parse_data<T: FromStr>(s: &str) -> Result<Vec<T>> {
+    let mut ret = Vec::new();
+    for l in s.lines() {
+        let data = match l.parse::<T>() {
+            Ok(d) => d,
+            Err(_) => panic!("parse error"),
+        };
+        ret.push(data);
+    }
+    Ok(ret)
 }
 
 pub fn read_file(filename: &str) -> Result<String> {