Merge pull request #117 from despawnerer/add-fromstr-implementation

Implement FromStr for ArrayString

Author: bluss

src/array_string.rs

@@ -5,6 +5,7 @@ use std::hash::{Hash, Hasher};
 use std::ptr;
 use std::ops::{Deref, DerefMut};
 use std::str;
+use std::str::FromStr;
 use std::str::Utf8Error;
 use std::slice;
 
@@ -507,6 +508,16 @@ impl<A> Ord for ArrayString<A>
     }
 }
 
+impl<A> FromStr for ArrayString<A>
+    where A: Array<Item=u8> + Copy
+{
+    type Err = CapacityError;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        Self::from(s).map_err(CapacityError::simplify)
+    }
+}
+
 #[cfg(feature="serde-1")]
 /// Requires crate feature `"serde-1"`
 impl<A> Serialize for ArrayString<A>

tests/tests.rs

@@ -487,6 +487,14 @@ fn test_string_from() {
     assert_eq!(u.len(), text.len());
 }
 
+#[test]
+fn test_string_parse_from_str() {
+    let text = "hello world";
+    let u: ArrayString<[_; 11]> = text.parse().unwrap();
+    assert_eq!(&u, text);
+    assert_eq!(u.len(), text.len());
+}
+
 #[test]
 fn test_string_from_bytes() {
     let text = "hello world";