io-smtp 0.1.0

SMTP client library
Documentation 
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//! Module dedicated to the SMTP parameter.

use core::fmt;

use alloc::borrow::Cow;

use bounded_static_derive::ToStatic;

use crate::rfc5321::types::atom::Atom;

/// An ESMTP parameter (keyword[=value]).
#[derive(Debug, Clone, PartialEq, Eq, Hash, ToStatic)]
pub struct Parameter<'a> {
    /// The parameter keyword
    pub keyword: Atom<'a>,
    /// The optional parameter value
    pub value: Option<Cow<'a, str>>,
}

impl fmt::Display for Parameter<'_> {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match &self.value {
            Some(value) => write!(f, "{}={}", self.keyword, value),
            None => write!(f, "{}", self.keyword),
        }
    }
}