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Jacob
2023-12-27 14:47:49 -05:00
commit bd6251495e
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2
.gitignore vendored Normal file
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/target
.history/

100
Cargo.lock generated Normal file
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# This file is automatically @generated by Cargo.
# It is not intended for manual editing.
version = 3
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Cargo.toml Normal file
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[package]
name = "rust-magic-function-params"
version = "0.1.0"
edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
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199
src/bin/magical-handler-functions.rs Normal file
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mod fundamentals {
pub struct FromSourceRefMarker;
pub struct FromSourceMarker;
pub trait FromMarker {} // TODO: I don't want to pub this..
impl FromMarker for FromSourceRefMarker {}
impl FromMarker for FromSourceMarker {}
pub trait FromSourceRef<Source> {
fn from_source_ref(source: &Source) -> Self;
}
pub trait FromSource<Source> {
fn from_source(source: Source) -> Self;
}
pub trait IntoHandler<Extractors, Return, Source, M>
where
M: FromMarker,
{
fn call(self, source: Source) -> Return;
}
// impl<F, Return, Source, Marker> IntoHandler<(), Return, Source, Marker> for F
// where
// F: Fn() -> Return,
// Marker: FromMarker,
// {
// fn call(self, _source: Source) -> Return {
// (self)()
// }
// }
impl<F, Return, Source> IntoHandler<(), Return, Source, FromSourceRefMarker> for F
where
F: Fn() -> Return,
{
fn call(self, _source: Source) -> Return {
(self)()
}
}
impl<F, T1, Return, Source> IntoHandler<(T1,), Return, Source, FromSourceRefMarker> for F
where
F: Fn(T1) -> Return,
T1: FromSourceRef<Source>,
{
fn call(self, source: Source) -> Return {
(self)(T1::from_source_ref(&source))
}
}
impl<F, T1, Return, Source> IntoHandler<(T1,), Return, Source, FromSourceMarker> for F
where
F: Fn(T1) -> Return,
T1: FromSource<Source>,
{
fn call(self, source: Source) -> Return {
(self)(T1::from_source(source))
}
}
impl<F, T1, T2, Return, Source> IntoHandler<(T1, T2), Return, Source, FromSourceRefMarker> for F
where
F: Fn(T1, T2) -> Return,
T1: FromSourceRef<Source>,
T2: FromSourceRef<Source>,
{
fn call(self, source: Source) -> Return {
(self)(T1::from_source_ref(&source), T2::from_source_ref(&source))
}
}
impl<F, T1, T2, Return, Source> IntoHandler<(T1, T2), Return, Source, FromSourceMarker> for F
where
F: Fn(T1, T2) -> Return,
T1: FromSourceRef<Source>,
T2: FromSource<Source>,
{
fn call(self, source: Source) -> Return {
(self)(T1::from_source_ref(&source), T2::from_source(source))
}
}
impl<F, T1, T2, T3, Return, Source>
IntoHandler<(T1, T2, T3), Return, Source, FromSourceRefMarker> for F
where
F: Fn(T1, T2, T3) -> Return,
T1: FromSourceRef<Source>,
T2: FromSourceRef<Source>,
T3: FromSourceRef<Source>,
{
fn call(self, source: Source) -> Return {
(self)(
T1::from_source_ref(&source),
T2::from_source_ref(&source),
T3::from_source_ref(&source),
)
}
}
impl<F, T1, T2, T3, Return, Source> IntoHandler<(T1, T2, T3), Return, Source, FromSourceMarker>
for F
where
F: Fn(T1, T2, T3) -> Return,
T1: FromSourceRef<Source>,
T2: FromSourceRef<Source>,
T3: FromSource<Source>,
{
fn call(self, source: Source) -> Return {
(self)(
T1::from_source_ref(&source),
T2::from_source_ref(&source),
T3::from_source(source),
)
}
}
}
mod library {
use super::fundamentals::*;
#[derive(Clone, Debug)]
pub struct Request {
customer: String,
order_id: u64,
amount_spent: f64,
}
impl FromSource<Request> for Request {
fn from_source(source: Request) -> Self {
source
}
}
pub struct Customer(pub String);
impl FromSource<Request> for Customer {
fn from_source(source: Request) -> Self {
Self(source.customer)
}
}
pub struct OrderId(pub u64);
impl FromSourceRef<Request> for OrderId {
fn from_source_ref(source: &Request) -> Self {
Self(source.order_id)
}
}
pub struct AmountSpent(pub f64);
impl FromSourceRef<Request> for AmountSpent {
fn from_source_ref(source: &Request) -> Self {
Self(source.amount_spent)
}
}
pub fn run_your_thing<F, Extractors, Marker: FromMarker>(f: F)
where
F: IntoHandler<Extractors, (), Request, Marker>,
{
let request = Request {
customer: "Faren Arbor".into(),
order_id: 894127642,
amount_spent: 21.48,
};
f.call(request);
}
}
mod userspace {
use super::library::*;
fn endpoint_empty() {
println!("I'm content not receiving anything!");
}
fn endpoint_wants_to_consume(Customer(customer): Customer) {
println!("But I'd appreciate knowing that the customer is {customer}!");
}
fn endpoint_wants_to_share(OrderId(order_id): OrderId, AmountSpent(amount_spent): AmountSpent) {
println!("so you said they spent {amount_spent} as part of order {order_id}.. now that's interesting...");
}
fn endpoint_wants_the_original_request(request: Request) {
println!("I don't care how invasive it is. I'm glad I can see the whole {request:#?}");
}
pub fn main() {
println!("Hello world! From userspace!");
run_your_thing(endpoint_empty);
run_your_thing(endpoint_wants_to_consume);
run_your_thing(endpoint_wants_to_share);
run_your_thing(endpoint_wants_the_original_request);
}
}
fn main() {
userspace::main();
}

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src/main.rs Normal file
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#[derive(Clone, Debug)]
struct Context {
id: i32,
param: String,
}
trait FromSourceRef<Source> {
fn from_source_ref(source: &Source) -> Self;
}
struct Id(pub i32);
impl FromSourceRef<Context> for Id {
fn from_source_ref(context: &Context) -> Self {
Id(context.id)
}
}
struct Param(pub String);
impl FromSourceRef<Context> for Param {
fn from_source_ref(context: &Context) -> Self {
Param(context.param.clone())
}
}
fn print_id(Id(id): Id) {
println!("id is {id}");
}
fn print_all(Param(param): Param, Id(id): Id) {
println!("id is {id} and param is {param}")
}
trait MagicFunction<T, C> {
fn call(self, context: C);
}
impl<F: Fn(T), T: FromSourceRef<C>, C> MagicFunction<(T,), C> for F {
fn call(self, context: C) {
(self)(T::from_source_ref(&context))
}
}
impl<F: Fn(T1, T2), T1: FromSourceRef<C>, T2: FromSourceRef<C>, C> MagicFunction<(T1, T2), C> for F {
fn call(self, context: C) {
(self)(T1::from_source_ref(&context), T2::from_source_ref(&context))
}
}
fn trigger<T, C>(function: impl MagicFunction<T, C>, context: C) {
function.call(context)
}
fn main() {
let context = Context {
id: 82137,
param: "bruh".into(),
};
trigger(print_id, context.clone());
trigger(print_all, context.clone());
}