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use super::*;
#[derive(Debug, Clone, Copy, PartialEq, PartialOrd)]
pub struct Scale(f64);
impl std::ops::Deref for Scale {
type Target = f64;
fn deref(&self) -> &Self::Target {
&self.0
}
}
impl std::ops::DerefMut for Scale {
fn deref_mut(&mut self) -> &mut Self::Target {
&mut self.0
}
}
impl AsRef<f64> for Scale {
fn as_ref(&self) -> &f64 {
&self.0
}
}
impl AsMut<f64> for Scale {
fn as_mut(&mut self) -> &mut f64 {
&mut self.0
}
}
impl From<f64> for Scale {
fn from(v: f64) -> Scale {
Scale(v)
}
}
impl From<Scale> for f64 {
fn from(v: Scale) -> f64 {
v.0
}
}
impl super::TypedHeader for Scale {
fn from_headers(headers: impl AsRef<Headers>) -> Result<Option<Self>, HeaderParseError> {
let headers = headers.as_ref();
let header = match headers.get(&SCALE) {
None => return Ok(None),
Some(header) => header,
};
let scale = header
.as_str()
.parse::<f64>()
.map(Scale)
.map_err(|_| HeaderParseError)?;
Ok(Some(scale))
}
fn insert_into(&self, mut headers: impl AsMut<Headers>) {
let headers = headers.as_mut();
headers.insert(SCALE, self.0.to_string());
}
}