add an example

README.md

@@ -6,8 +6,7 @@
 ## Example
 
 ```rust
-let input = br#"
+let input = br#"Date: 7 Mar 2023 08:00:00 +0200
-Date: 7 Mar 2023 08:00:00 +0200
 From: deuxfleurs@example.com
 To: someone_else@example.com
 Subject: An RFC 822 formatted message
@@ -15,10 +14,14 @@ MIME-Version: 1.0
 Content-Type: text/plain; charset=us-ascii
 
 This is the plain text body of the message. Note the blank line
-between the header information and the body of the message.#;
+between the header information and the body of the message."#;
 
 let email = eml_codec::email(input).unwrap();
-println!("{} just sent you an email with subject \"{}\", email.1.
+println!(
+    "{} just sent you an email with subject \"{}\"",
+    email.1.from[0].to_string(),
+    email.1.subject.unwrap().to_string(),
+);
 ```
 
 ## About the name

examples/simple.rs

@@ -0,0 +1,18 @@
+pub fn main() {
+    let input = br#"Date: 7 Mar 2023 08:00:00 +0200
+From: deuxfleurs@example.com
+To: someone_else@example.com
+Subject: An RFC 822 formatted message
+MIME-Version: 1.0
+Content-Type: text/plain; charset=us-ascii
+
+This is the plain text body of the message. Note the blank line
+between the header information and the body of the message."#;
+
+    let email = eml_codec::email(input).unwrap();
+    println!(
+        "{} just sent you an email with subject \"{}\"", 
+        email.1.from[0].to_string(),
+        email.1.subject.unwrap().to_string(),
+    );
+}

src/header.rs

@@ -49,20 +49,6 @@ pub fn header<'a, T>(
     }
 }
 
-/*
-pub fn header_in_boundaries<'a, T>(bound: &'a [u8], fx: impl Fn(&'a [u8]) -> IResult<&[u8], T> + Copy)
-    -> impl Fn(&'a [u8]) -> IResult<&[u8], CompFieldList<T>>
-{
-    move |input| map(terminated(many0(preceded(
-        not(boundary(bound)),
-        alt((
-            map(fx, CompField::Known),
-            map(opt_field, |(k,v)| CompField::Unknown(k,v)),
-            map(foldable_line, CompField::Bad),
-        )))), obs_crlf), CompFieldList)(input)
-}
-*/
-
 pub fn field_name<'a>(name: &'static [u8]) -> impl Fn(&'a [u8]) -> IResult<&'a [u8], &'a [u8]> {
     move |input| terminated(tag_no_case(name), tuple((space0, tag(b":"), space0)))(input)
 }