initial laptop commit

.gitignore

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+/target
+.history/

Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "test-const-traits"
+version = "0.1.0"

Cargo.toml

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+[package]
+name = "test-const-traits"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

examples/access-macro.rs

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+macro_rules! access {
+    ($instance: expr, $trait: path, $with: expr) => {
+        {
+            fn get_thing<T: $trait>(instance: &T) {
+                $with(<T as $trait>::Type)
+            }
+
+            get_thing($instance)
+        }
+    }
+}
+
+struct Cat;
+struct Dog;
+
+trait Animal {
+    type Type;
+}
+
+impl Animal for Cat {
+    type Type = u32;
+}
+
+impl Animal for Dog {
+    type Type = i64;
+}
+
+trait MaxAndMin {
+    type Type;
+    const MAXIMUM: Self::Type;
+    const MINIMUM: Self::Type;
+}
+
+impl MaxAndMin for u32 {
+    type Type = u32;
+    const MAXIMUM: Self::Type = u32::MAX;
+    const MINIMUM: Self::Type = u32::MIN;
+}
+
+impl MaxAndMin for i64 {
+    type Type = i64;
+    const MAXIMUM: Self::Type = i64::MAX;
+    const MINIMUM: Self::Type = i64::MIN;
+}
+
+fn main() {
+    let katniss = Cat;
+    let lola = Dog;
+
+    fn get_min<T: Animal>(instance: &T) -> <<T as Animal>::Type as MaxAndMin>::Type where T::Type: MaxAndMin {
+        <T::Type as MaxAndMin>::MINIMUM
+    }
+
+    let katniss_max = get_min(&katniss);
+    let lola_max = get_min(&lola);
+
+    println!("{katniss_max}");
+    println!("{lola_max}");
+
+    // let max = access!(&katniss, Animal, ::MAX);
+
+    // println!("{legs}");
+}

examples/relate-macro.rs

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+struct Katniss;
+struct Chiko;
+struct Lola;
+
+struct Cat;
+struct Dog;
+
+struct Jacob;
+
+macro_rules! relate {
+    ($in: ty, $out: ty, $forward: ty, $backward: ty) => {
+        todo!();
+    };
+}
+
+relate!(Jacob, Katniss, Loves, IsLovedBy);
+
+
+// relate_many!(Cat, (Katniss, Chiko), HasMembers, Species);
+// relate_many!(Dog, (Lola,), HasMembers, Species);
+
+
+// relate!();
+
+// relate_bidirectional!();
+
+// relate_many_bidirectional!();
+
+// relate_many!(Lola, (Katniss, Chiko), );
+
+
+fn main() {
+
+}
+
+
+#[rustfmt::skip]
+macro_rules! all_the_tuples {
+    ($name:ident) => {
+        $name!([], T1);
+        $name!([T1], T2);
+        $name!([T1, T2], T3);
+        $name!([T1, T2, T3], T4);
+        $name!([T1, T2, T3, T4], T5);
+        $name!([T1, T2, T3, T4, T5], T6);
+        $name!([T1, T2, T3, T4, T5, T6], T7);
+        $name!([T1, T2, T3, T4, T5, T6, T7], T8);
+        $name!([T1, T2, T3, T4, T5, T6, T7, T8], T9);
+        $name!([T1, T2, T3, T4, T5, T6, T7, T8, T9], T10);
+        $name!([T1, T2, T3, T4, T5, T6, T7, T8, T9, T10], T11);
+        $name!([T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11], T12);
+        $name!([T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12], T13);
+        $name!([T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13], T14);
+        $name!([T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14], T15);
+        $name!([T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15], T16);
+    };
+}
+
+macro_rules! all_the_tuples_no_last_special_case {
+    ($name:ident) => {
+        $name!(T1);
+        $name!(T1, T2);
+        $name!(T1, T2, T3);
+        $name!(T1, T2, T3, T4);
+        $name!(T1, T2, T3, T4, T5);
+        $name!(T1, T2, T3, T4, T5, T6);
+        $name!(T1, T2, T3, T4, T5, T6, T7);
+        $name!(T1, T2, T3, T4, T5, T6, T7, T8);
+        $name!(T1, T2, T3, T4, T5, T6, T7, T8, T9);
+        $name!(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10);
+        $name!(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11);
+        $name!(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12);
+        $name!(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13);
+        $name!(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14);
+        $name!(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15);
+        $name!(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16);
+    };
+}

src/main.rs

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+use core::fmt::Debug;
+
+trait Value {
+    type Type;
+    const VALUE: Self::Type;
+}
+
+fn create_value() -> impl Value<Type = u32> {
+    struct Struct;
+    impl Value for Struct {
+        type Type = u32;
+        const VALUE: Self::Type = 17;
+    }
+
+    let instance = Struct;
+    instance
+}
+
+fn print_value<T: Value>(t: T)
+where
+    <T as Value>::Type: Debug,
+{
+    let value = T::VALUE;
+    println!("{value:?}");
+}
+
+fn main() {
+    let my_thing = create_value();
+    print_value(my_thing);
+}