Enum ContentTransferEncoding 

pub enum ContentTransferEncoding {
    SevenBit,
    EightBit,
    QuotedPrintable,
    Base64,
}

MIME Content-Transfer-Encoding choices the builder picks from.

Variants

SevenBit

7bit — body is pure ASCII with every line ≤ 998 chars (RFC 5322 §2.1.1) and no NUL bytes. Body is emitted verbatim.

EightBit

8bit — body has ≥1 high-bit byte but every line is still short and the body is text-shaped. Emitted verbatim. Use requires the receiving MTA to support 8BITMIME — most do, but for compatibility callers can prefer QuotedPrintable.

QuotedPrintable

quoted-printable — body has high-bit bytes or long lines and is text-shaped. Output is wrapped at 76 chars per RFC 2045 §6.7.

Base64

base64 — body looks binary (high non-printable density or embedded NUL). Output is 76-char wrapped per RFC 2045 §6.8.

Implementations

impl ContentTransferEncoding

pub fn as_str(self) -> &'static str

The header-value string used in the Content-Transfer-Encoding: header.

Trait Implementations

impl Clone for ContentTransferEncoding

fn clone(&self) -> ContentTransferEncoding

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ContentTransferEncoding

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for ContentTransferEncoding

fn eq(&self, other: &ContentTransferEncoding) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for ContentTransferEncoding

impl Eq for ContentTransferEncoding

impl StructuralPartialEq for ContentTransferEncoding