WIP: try to use ts-macros for more implementations

src/interfaces/type.ts

@@ -1,3 +1,5 @@
+import {$$typeToString, $$ident, $$define} from 'ts-macros'
+
 /*****
  * Every typocomath type has some associated types; they need
  * to be published in the following interface. The key is the
@@ -74,6 +76,13 @@ type SignatureKey<T> = keyof Signatures<T>
 
 export type Signature<Name extends SignatureKey<T>, T> = Signatures<T>[Name]
 export type Returns<Name extends SignatureKey<T>, T> = ReturnType<Signatures<T>[Name]>
-export type Dependencies<Name extends SignatureKey<T>, T> = {[K in Name]: Signature<K, T>}
+type Deps<T> =  T extends unknown ? { [K in keyof T]: T[K] } : never;
+export type Dependencies<Name extends SignatureKey<T>, T> = Deps<{[K in Name]: Signature<K, T>}>
 
 export type AliasOf<Name extends string, T> = T & {aliasOf?: Name}
+
+// For defining implementations with type reflection
+export function $implement<Impl>(name: string, expr: Impl) {
+   $$define!(name, expr, false, true); // Final `true` is export
+   $$ident!(name).reflectedType = $$typeToString!<Impl>();
+}