From 1d0378c454de72ddcfc08bcc105744923ef2d4d4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Matthias=20Kr=C3=BCger?= <matthias.krueger@famsik.de>
Date: Thu, 18 Jun 2020 01:36:43 +0200
Subject: [PATCH 1/2] impl From<char> for String

This allows us to write

fn char_to_string() -> String {
    'a'.into()
}

which was not possible before.
---
 src/liballoc/string.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/liballoc/string.rs b/src/liballoc/string.rs
index 0378ff5362a8b..cf86ba055b8af 100644
--- a/src/liballoc/string.rs
+++ b/src/liballoc/string.rs
@@ -2508,3 +2508,11 @@ impl DoubleEndedIterator for Drain<'_> {
 
 #[stable(feature = "fused", since = "1.26.0")]
 impl FusedIterator for Drain<'_> {}
+
+#[stable(feature = "from_char_for_string", since = "1.46.0")]
+impl From<char> for String {
+    #[inline]
+    fn from(c: char) -> Self {
+        c.to_string()
+    }
+}

From 2cde4932c7e8bd6000378af41029299ccf6eea69 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Matthias=20Kr=C3=BCger?= <matthias.krueger@famsik.de>
Date: Thu, 18 Jun 2020 11:19:03 +0200
Subject: [PATCH 2/2] add test for char into string

---
 src/liballoc/tests/string.rs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/liballoc/tests/string.rs b/src/liballoc/tests/string.rs
index 9ea020d2d19f4..d38655af78cb7 100644
--- a/src/liballoc/tests/string.rs
+++ b/src/liballoc/tests/string.rs
@@ -714,3 +714,10 @@ fn test_try_reserve_exact() {
         }
     }
 }
+
+#[test]
+fn test_from_char() {
+    assert_eq!(String::from('a'), 'a'.to_string());
+    let s: String = 'x'.into();
+    assert_eq!(s, 'x'.to_string());
+}