review: replace i32 with Vec<i32> as roll return type for future exploding dice

01.workspace/oxidice_lib/src/imp/die_roll.rs

@@ -1,18 +1,18 @@
 use crate::*;
 use std::ops::*;
 
-fn roll_sides(sides: u16) -> i32 {
+fn roll_sides(sides: u16) -> Vec<i32> {
     let mut rng = rand::rng();
-    rng.random_range(1..=sides) as i32
+    vec![rng.random_range(1..=sides as i32)]
 }
 
-fn roll_range(range: RangeInclusive<i32>) -> i32 {
+fn roll_range(range: RangeInclusive<i32>) -> Vec<i32> {
     let mut rng = rand::rng();
-    rng.random_range(range)
+    vec![rng.random_range(range)]
 }
 
 impl Die {
-    pub fn roll(&self) -> i32 {
+    pub fn roll(&self) -> Vec<i32> {
         match self {
             Die::Sides(sides) => roll_sides(*sides),
             Die::Range(range) => roll_range(range.clone()),
@@ -27,7 +27,7 @@ mod tests {
     fn check_roll_range() {
         let die = Die::Range(5..=5);
         for _ in 1..=1000 {
-            assert_eq!(die.roll(), 5);
+            assert_eq!(die.roll(), [5]);
         }
     }
 }

01.workspace/oxidice_lib/src/imp/handful_roll.rs

@@ -4,7 +4,7 @@ impl Handful {
     pub fn roll(self) -> Outcome {
         let mut die_rolls = Vec::<i32>::new();
         for die in self.dice {
-            die_rolls.push(die.roll());
+            die_rolls.append(&mut die.roll());
         }
         Outcome::List(die_rolls)
     }