More conversions for HeaderValues

Author: yoshuawuyts

src/headers/header_value.rs

@@ -1,6 +1,7 @@
 use std::fmt::{self, Display};
 use std::str::FromStr;
 
+use crate::headers::HeaderValues;
 use crate::Error;
 use crate::{Cookie, Mime};
 
@@ -119,3 +120,9 @@ impl<'a> PartialEq<&String> for HeaderValue {
         &&self.inner == other
     }
 }
+
+impl From<HeaderValues> for HeaderValue {
+    fn from(other: HeaderValues) -> Self {
+        other[0]
+    }
+}

src/headers/header_values.rs

@@ -1,7 +1,7 @@
 use crate::headers::HeaderValue;
 use std::fmt::{self, Display};
 use std::iter::FromIterator;
-use std::ops::Index;
+use std::ops::{Deref, DerefMut, Index};
 use std::slice::SliceIndex;
 
 /// A list of `HeaderValue`s.
@@ -87,3 +87,34 @@ impl<'a> PartialEq<&String> for HeaderValues {
         &&self.inner[0] == other
     }
 }
+
+impl From<HeaderValue> for HeaderValues {
+    fn from(other: HeaderValue) -> Self {
+        Self { inner: vec![other] }
+    }
+}
+
+impl AsRef<HeaderValue> for HeaderValues {
+    fn as_ref(&self) -> &HeaderValue {
+        &self.inner[0]
+    }
+}
+
+impl AsMut<HeaderValue> for HeaderValues {
+    fn as_mut(&mut self) -> &mut HeaderValue {
+        &mut self.inner[0]
+    }
+}
+impl Deref for HeaderValues {
+    type Target = HeaderValue;
+
+    fn deref(&self) -> &HeaderValue {
+        &self.inner[0]
+    }
+}
+
+impl DerefMut for HeaderValues {
+    fn deref_mut(&mut self) -> &mut HeaderValue {
+        &mut self.inner[0]
+    }
+}

src/headers/values.rs

@@ -3,7 +3,7 @@ use std::iter::Iterator;
 
 use crate::headers::{HeaderName, HeaderValue, HeaderValues};
 
-/// Iterator over the headers.
+/// Iterator over the header values.
 #[derive(Debug)]
 pub struct Values<'a> {
     pub(super) inner: hash_map::Values<'a, HeaderName, HeaderValues>,