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pub use fast_map_derive::FastMap;
#[derive(Debug)]
pub enum Error {
KeyNotFound,
}
impl std::fmt::Display for Error {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
Error::KeyNotFound => "Key not found".fmt(f),
}
}
}
impl std::error::Error for Error {}
mod maps;
pub use maps::*;
pub struct Values<'fast_map, T>(std::vec::IntoIter<Option<&'fast_map T>>);
impl<'fast_map, T> Values<'fast_map, T> {
#[doc(hidden)]
pub fn new(t: std::vec::IntoIter<Option<&'fast_map T>>) -> Self {
Values(t)
}
}
impl<'fast_map, T> Iterator for Values<'fast_map, T> {
type Item = &'fast_map T;
fn next(&mut self) -> Option<Self::Item> {
loop {
match self.0.next() {
Some(Some(ref inner)) => {
return Some(inner);
}
Some(None) => {
continue;
}
None => {
return None;
}
}
}
}
}
pub mod easy {
use super::{strict, Values};
pub trait MapLike<K: ?Sized, T>: strict::MapLike<K, T> {
fn get<B: std::borrow::Borrow<K>>(&self, key: B) -> Option<&T> {
strict::MapLike::get(self, key).ok().and_then(|x| x)
}
fn insert<B: std::borrow::Borrow<K>>(&mut self, key: B, val: T) -> Option<T> {
strict::MapLike::insert(self, key, val).ok().and_then(|x| x)
}
fn remove<B: std::borrow::Borrow<K>>(&mut self, key: B) -> Option<T> {
strict::MapLike::remove(self, key).ok().and_then(|x| x)
}
fn values<'fast_map>(&'fast_map self) -> Values<'fast_map, T> {
strict::MapLike::values(self)
}
}
impl<K: ?Sized, T, U> MapLike<K, T> for U where U: strict::MapLike<K, T> {}
}
pub mod strict {
use super::{Error, Values};
pub trait MapLike<K: ?Sized, T> {
fn get<B: std::borrow::Borrow<K>>(&self, key: B) -> std::result::Result<Option<&T>, Error>;
fn insert<B: std::borrow::Borrow<K>>(
&mut self,
key: B,
val: T,
) -> std::result::Result<Option<T>, Error>;
fn remove<B: std::borrow::Borrow<K>>(
&mut self,
key: B,
) -> std::result::Result<Option<T>, Error>;
fn values<'fast_map>(&'fast_map self) -> Values<'fast_map, T>;
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn it_works() {
pub enum A {
A,
B,
C,
D,
};
use strict::MapLike;
#[derive(Default, FastMap)]
#[fast_map(crate_name = "crate", keys(A::A, A::B, A::C, A::D))]
struct Foo(crate::Map64<A, String>);
let mut foo = Foo::default();
foo.insert(A::B, "B".into()).unwrap();
assert_eq!(foo.get(A::B).unwrap(), Some(&"B".to_string()));
assert_eq!(foo.get(A::C).unwrap(), None);
foo.insert(A::C, "C".into()).unwrap();
assert_eq!(foo.values().collect::<Vec<_>>().len(), 2);
}
#[test]
fn it_works_2() {
use easy::MapLike;
#[derive(Default, FastMap)]
#[fast_map(crate_name = "crate", keys("x", "y", "z"))]
struct Foo<'a>(crate::Map3<str, &'a str>);
let mut foo = Foo::default();
let insert_x = String::from("x");
foo.insert(insert_x.as_str(), &insert_x);
assert_eq!(foo.values().collect::<Vec<_>>().len(), 1);
let x = foo.remove("x").unwrap();
assert_eq!(x, "x");
assert!(foo.values().collect::<Vec<_>>().is_empty());
}
#[test]
fn it_works_3() {
use crate::easy::MapLike;
#[derive(Default, FastMap)]
#[fast_map(crate_name = "crate", keys(1, 2, 3))]
struct Foo<'a>(crate::Map3<usize, &'a str>);
let mut foo = Foo::default();
foo.insert(1, "1");
foo.insert(2, "2");
foo.insert(3, "3");
foo.insert(4, "4");
let _ = foo.remove(1);
assert_eq!(foo.values().map(|x| *x).collect::<Vec<_>>(), vec!["2", "3"]);
}
}