From 925d039b2e079cd791e4849e736b8d29ec751d69 Mon Sep 17 00:00:00 2001
From: ia7ck <23146842+ia7ck@users.noreply.github.com>
Date: Wed, 12 Nov 2025 23:37:36 +0900
Subject: [PATCH 1/3] new(Vec<T>)

---
 libs/zarts/src/lib.rs | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/libs/zarts/src/lib.rs b/libs/zarts/src/lib.rs
index 9470ac79..8e321e92 100644
--- a/libs/zarts/src/lib.rs
+++ b/libs/zarts/src/lib.rs
@@ -50,7 +50,7 @@ where
     T: Ord,
 {
     fn from_iter<I: IntoIterator<Item = T>>(iter: I) -> Self {
-        Self::new(iter)
+        Self::new(iter.into_iter().collect())
     }
 }
 
@@ -58,8 +58,7 @@ impl<T> SortedSeq<T>
 where
     T: Ord,
 {
-    pub fn new(values: impl IntoIterator<Item = T>) -> Self {
-        let mut values = values.into_iter().collect::<Vec<_>>();
+    pub fn new(mut values: Vec<T>) -> Self {
         values.sort_unstable();
         values.dedup();
         Self(values)
@@ -116,7 +115,7 @@ mod tests {
 
     #[test]
     fn index_test() {
-        let seq = SortedSeq::new([4, 4, 2, 5, 2, 9]);
+        let seq = SortedSeq::new(vec![4, 4, 2, 5, 2, 9]);
         // 2, 4, 5, 9
         assert_eq!(seq.at(0), &2);
         assert_eq!(seq.at(1), &4);

From c3eea6db844646c361167aa4ee4f799e4383983d Mon Sep 17 00:00:00 2001
From: ia7ck <23146842+ia7ck@users.noreply.github.com>
Date: Wed, 12 Nov 2025 23:38:25 +0900
Subject: [PATCH 2/3] len, is_empty

---
 libs/zarts/src/lib.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/libs/zarts/src/lib.rs b/libs/zarts/src/lib.rs
index 8e321e92..99ff3d47 100644
--- a/libs/zarts/src/lib.rs
+++ b/libs/zarts/src/lib.rs
@@ -77,9 +77,13 @@ where
     }
 
     /// 集合のサイズを返します
-    pub fn size(&self) -> usize {
+    pub fn len(&self) -> usize {
         self.0.len()
     }
+
+    pub fn is_empty(&self) -> bool {
+        self.0.is_empty()
+    }
 }
 
 impl<T> Index<usize> for SortedSeq<T> {

From 5ae53cf57ff28138a0dfed18330167e4f318006c Mon Sep 17 00:00:00 2001
From: ia7ck <23146842+ia7ck@users.noreply.github.com>
Date: Wed, 12 Nov 2025 23:39:08 +0900
Subject: [PATCH 3/3] move

---
 libs/zarts/src/lib.rs | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/libs/zarts/src/lib.rs b/libs/zarts/src/lib.rs
index 99ff3d47..c72e915e 100644
--- a/libs/zarts/src/lib.rs
+++ b/libs/zarts/src/lib.rs
@@ -45,15 +45,6 @@ use std::{
 ///
 pub struct SortedSeq<T>(Vec<T>);
 
-impl<T> FromIterator<T> for SortedSeq<T>
-where
-    T: Ord,
-{
-    fn from_iter<I: IntoIterator<Item = T>>(iter: I) -> Self {
-        Self::new(iter.into_iter().collect())
-    }
-}
-
 impl<T> SortedSeq<T>
 where
     T: Ord,
@@ -86,6 +77,15 @@ where
     }
 }
 
+impl<T> FromIterator<T> for SortedSeq<T>
+where
+    T: Ord,
+{
+    fn from_iter<I: IntoIterator<Item = T>>(iter: I) -> Self {
+        Self::new(iter.into_iter().collect())
+    }
+}
+
 impl<T> Index<usize> for SortedSeq<T> {
     type Output = T;