first idea on multipass

src/email.rs

@@ -0,0 +1,51 @@
+#[derive(Debug, PartialEq)]
+pub struct Raw<'a>(&'a [u8]);
+
+pub struct Segment<'a> {
+    pub header: &'a [u8],
+    pub body: &'a [u8],
+}
+
+/*
+pub struct DecodeHeader<'a> {
+    pub header: Cow<'a, &str>;
+    pub encoding: &'static Encoding;
+    pub is_malformed: bool;
+    pub body: &'a [u8];
+}
+
+pub struct ExtractHeaderLines<'a> {
+    pub header: Vec<Cow<'a, &str>>;
+    pub body: &'a [u8];
+}
+
+pub struct ParseFieldNames<'a> {
+    pub header: Vec<FieldName>;
+    pub body: &'a [u8];
+    pub bad_lines: Vec<Cow<'a, &str>;
+}
+
+pub struct ParseFieldBody<'a> {
+    pub header: Vec<FieldBody>;
+    pub body: &'a [u8];
+    pub bad_lines: Vec<Cow<'a, &str>;
+    pub bad_fields: Vec<FieldName>;
+}
+
+pub struct BuildHeaderSection<'a> {
+    pub header: Section<'a>;
+    pub body: &'a [u8];
+}*/
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_create_parser() {
+        assert_eq!(
+            Raw(b"From: a@a.com\r\n\r\n"),
+            Raw(&[0x46, 0x72, 0x6F, 0x6D, 0x3A, 0x20, 0x61, 0x40, 0x61, 0x2E, 0x63, 0x6F, 0x6D, 0x0D, 0x0A, 0x0D, 0x0A]),
+        );
+    }
+}

src/lib.rs

@@ -16,3 +16,6 @@ mod datetime;
 
 // Header blocks
 pub mod header;
+
+// root
+pub mod email;