From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:02:58 +0200
Subject: Adding upstream version 1.64.0+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../tests/ui/from_iter_instead_of_collect.rs       | 61 ++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 src/tools/clippy/tests/ui/from_iter_instead_of_collect.rs

(limited to 'src/tools/clippy/tests/ui/from_iter_instead_of_collect.rs')

diff --git a/src/tools/clippy/tests/ui/from_iter_instead_of_collect.rs b/src/tools/clippy/tests/ui/from_iter_instead_of_collect.rs
new file mode 100644
index 000000000..ebe0ad278
--- /dev/null
+++ b/src/tools/clippy/tests/ui/from_iter_instead_of_collect.rs
@@ -0,0 +1,61 @@
+// run-rustfix
+
+#![warn(clippy::from_iter_instead_of_collect)]
+#![allow(unused_imports, unused_tuple_struct_fields)]
+
+use std::collections::{BTreeMap, BTreeSet, HashMap, VecDeque};
+
+struct Foo(Vec<bool>);
+
+impl FromIterator<bool> for Foo {
+    fn from_iter<T: IntoIterator<Item = bool>>(_: T) -> Self {
+        todo!()
+    }
+}
+
+impl<'a> FromIterator<&'a bool> for Foo {
+    fn from_iter<T: IntoIterator<Item = &'a bool>>(iter: T) -> Self {
+        <Self as FromIterator<bool>>::from_iter(iter.into_iter().copied())
+    }
+}
+
+fn main() {
+    let iter_expr = std::iter::repeat(5).take(5);
+    let _ = Vec::from_iter(iter_expr);
+
+    let _ = HashMap::<usize, &i8>::from_iter(vec![5, 5, 5, 5].iter().enumerate());
+
+    Vec::from_iter(vec![42u32]);
+
+    let a = vec![0, 1, 2];
+    assert_eq!(a, Vec::from_iter(0..3));
+    assert_eq!(a, Vec::<i32>::from_iter(0..3));
+
+    let mut b = VecDeque::from_iter(0..3);
+    b.push_back(4);
+
+    let mut b = VecDeque::<i32>::from_iter(0..3);
+    b.push_back(4);
+
+    {
+        use std::collections;
+        let mut b = collections::VecDeque::<i32>::from_iter(0..3);
+        b.push_back(4);
+    }
+
+    let values = [(0, 'a'), (1, 'b'), (2, 'c'), (3, 'd')];
+    let bm = BTreeMap::from_iter(values.iter().cloned());
+    let mut bar = BTreeMap::from_iter(bm.range(0..2));
+    bar.insert(&4, &'e');
+
+    let mut bts = BTreeSet::from_iter(0..3);
+    bts.insert(2);
+    {
+        use std::collections;
+        let _ = collections::BTreeSet::from_iter(0..3);
+        let _ = collections::BTreeSet::<u32>::from_iter(0..3);
+    }
+
+    for _i in Vec::from_iter([1, 2, 3].iter()) {}
+    for _i in Vec::<&i32>::from_iter([1, 2, 3].iter()) {}
+}
-- 
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