d203a348cb
Only std::io is still missing, maybe we should consider using a crate implementing its API on top of no_std?
96 lines
2.6 KiB
Rust
96 lines
2.6 KiB
Rust
// Copyright (c) 2020 lumi <lumi@pew.im>
|
|
// Copyright (c) 2020 Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
|
|
//
|
|
// This Source Code Form is subject to the terms of the Mozilla Public
|
|
// License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
|
|
|
|
//! A module which exports a few traits for converting types to elements and attributes.
|
|
|
|
use alloc::string::String;
|
|
|
|
/// A trait for types which can be converted to an attribute value.
|
|
pub trait IntoAttributeValue {
|
|
/// Turns this into an attribute string, or None if it shouldn't be added.
|
|
fn into_attribute_value(self) -> Option<String>;
|
|
}
|
|
|
|
macro_rules! impl_into_attribute_value {
|
|
($t:ty) => {
|
|
impl IntoAttributeValue for $t {
|
|
fn into_attribute_value(self) -> Option<String> {
|
|
Some(self.to_string())
|
|
}
|
|
}
|
|
};
|
|
}
|
|
|
|
macro_rules! impl_into_attribute_values {
|
|
($($t:ty),*) => {
|
|
$(impl_into_attribute_value!($t);)*
|
|
}
|
|
}
|
|
|
|
impl_into_attribute_values!(
|
|
usize,
|
|
u64,
|
|
u32,
|
|
u16,
|
|
u8,
|
|
isize,
|
|
i64,
|
|
i32,
|
|
i16,
|
|
i8,
|
|
::core::net::IpAddr
|
|
);
|
|
|
|
impl IntoAttributeValue for String {
|
|
fn into_attribute_value(self) -> Option<String> {
|
|
Some(self)
|
|
}
|
|
}
|
|
|
|
impl IntoAttributeValue for &String {
|
|
fn into_attribute_value(self) -> Option<String> {
|
|
Some(self.to_owned())
|
|
}
|
|
}
|
|
|
|
impl IntoAttributeValue for &str {
|
|
fn into_attribute_value(self) -> Option<String> {
|
|
Some(self.to_owned())
|
|
}
|
|
}
|
|
|
|
impl<T: IntoAttributeValue> IntoAttributeValue for Option<T> {
|
|
fn into_attribute_value(self) -> Option<String> {
|
|
self.and_then(IntoAttributeValue::into_attribute_value)
|
|
}
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use super::IntoAttributeValue;
|
|
use core::net::IpAddr;
|
|
use core::str::FromStr;
|
|
|
|
#[test]
|
|
fn test_into_attribute_value_on_ints() {
|
|
assert_eq!(16u8.into_attribute_value().unwrap(), "16");
|
|
assert_eq!(17u16.into_attribute_value().unwrap(), "17");
|
|
assert_eq!(18u32.into_attribute_value().unwrap(), "18");
|
|
assert_eq!(19u64.into_attribute_value().unwrap(), "19");
|
|
assert_eq!(16i8.into_attribute_value().unwrap(), "16");
|
|
assert_eq!((-17i16).into_attribute_value().unwrap(), "-17");
|
|
assert_eq!(18i32.into_attribute_value().unwrap(), "18");
|
|
assert_eq!((-19i64).into_attribute_value().unwrap(), "-19");
|
|
assert_eq!(
|
|
IpAddr::from_str("0000:0::1")
|
|
.unwrap()
|
|
.into_attribute_value()
|
|
.unwrap(),
|
|
"::1"
|
|
);
|
|
}
|
|
}
|