Merge rust-lang#39

39: implement FromStr r=matklad a=matklad

closes rust-lang#31

bors r+
🤖

Co-authored-by: Aleksey Kladov <[email protected]>

Author: bors[bot]

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "smol_str"
-version = "0.1.18"
+version = "0.1.19"
 description = "small-string optimized string type with O(1) clone"
 license = "MIT OR Apache-2.0"
 repository = "https://github.com/matklad/smol_str"

src/lib.rs

@@ -6,11 +6,13 @@ extern crate core as std;
 #[cfg(not(feature = "std"))]
 extern crate alloc;
 
+use core::convert::Infallible;
 use std::{
     borrow::Borrow,
     cmp::{self, Ordering},
     fmt, hash, iter,
     ops::Deref,
+    str::FromStr,
 };
 
 #[cfg(not(feature = "std"))]
@@ -316,6 +318,15 @@ impl Borrow<str> for SmolStr {
     }
 }
 
+impl FromStr for SmolStr {
+    type Err = Infallible;
+
+    #[inline]
+    fn from_str(s: &str) -> Result<SmolStr, Self::Err> {
+        Ok(SmolStr::from(s))
+    }
+}
+
 #[cfg(feature = "arbitrary")]
 impl<'a> arbitrary::Arbitrary<'a> for SmolStr {
     fn arbitrary(u: &mut arbitrary::Unstructured<'a>) -> Result<Self, arbitrary::Error> {