mirror of
https://github.com/actix/actix-web.git
synced 2024-05-09 03:53:00 +00:00
71 lines
2 KiB
Rust
71 lines
2 KiB
Rust
use std::{
|
|
fmt::{self, Write as _},
|
|
str,
|
|
};
|
|
|
|
/// A wrapper for types used in header values where wildcard (`*`) items are allowed but the
|
|
/// underlying type does not support them.
|
|
///
|
|
/// For example, we use the `language-tags` crate for the [`AcceptLanguage`](super::AcceptLanguage)
|
|
/// typed header but it does parse `*` successfully. On the other hand, the `mime` crate, used for
|
|
/// [`Accept`](super::Accept), has first-party support for wildcard items so this wrapper is not
|
|
/// used in those header types.
|
|
#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Hash)]
|
|
pub enum AnyOrSome<T> {
|
|
/// A wildcard value.
|
|
Any,
|
|
|
|
/// A valid `T`.
|
|
Item(T),
|
|
}
|
|
|
|
impl<T> AnyOrSome<T> {
|
|
/// Returns true if item is wildcard (`*`) variant.
|
|
pub fn is_any(&self) -> bool {
|
|
matches!(self, Self::Any)
|
|
}
|
|
|
|
/// Returns true if item is a valid item (`T`) variant.
|
|
pub fn is_item(&self) -> bool {
|
|
matches!(self, Self::Item(_))
|
|
}
|
|
|
|
/// Returns reference to value in `Item` variant, if it is set.
|
|
pub fn item(&self) -> Option<&T> {
|
|
match self {
|
|
AnyOrSome::Item(ref item) => Some(item),
|
|
AnyOrSome::Any => None,
|
|
}
|
|
}
|
|
|
|
/// Consumes the container, returning the value in the `Item` variant, if it is set.
|
|
pub fn into_item(self) -> Option<T> {
|
|
match self {
|
|
AnyOrSome::Item(item) => Some(item),
|
|
AnyOrSome::Any => None,
|
|
}
|
|
}
|
|
}
|
|
|
|
impl<T: fmt::Display> fmt::Display for AnyOrSome<T> {
|
|
#[inline]
|
|
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
|
|
match self {
|
|
AnyOrSome::Any => f.write_char('*'),
|
|
AnyOrSome::Item(item) => fmt::Display::fmt(item, f),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl<T: str::FromStr> str::FromStr for AnyOrSome<T> {
|
|
type Err = T::Err;
|
|
|
|
#[inline]
|
|
fn from_str(s: &str) -> Result<Self, Self::Err> {
|
|
match s.trim() {
|
|
"*" => Ok(Self::Any),
|
|
other => other.parse().map(AnyOrSome::Item),
|
|
}
|
|
}
|
|
}
|