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@@ -1,8 +1,7 @@
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import { Fn, Pipe, Tuples } from "hotscript"
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import { AbstractClass, Class, Simplify } from "type-fest"
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import { Trait, TraitInstance, TraitStaticMembers, Traits } from "./Trait"
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import { TraitBuilder } from "./TraitBuilder"
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import { ExtendFn, ExtendPlain, SimplifyFn, StaticMembers, StaticMembersFn } from "./util"
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import { ExtendPlain, StaticMembers } from "./util"
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export class TraitExpression<
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@@ -16,23 +15,22 @@ export class TraitExpression<
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get extends(): (
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AbstractClass<
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Pipe<T, [
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Tuples.Map<Trait.OwnImplInstanceFn>, // Map all the traits to the instance of their implementation class
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Tuples.Prepend<InstanceType<Superclass>>, // Add the instance of the superclass at the top of the list
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ExtendFn, // Reduce to a single instance that extends all the instances in the list
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SimplifyFn, // Make readable for IDEs
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]>,
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Simplify<
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ExtendPlain<[
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InstanceType<Superclass>,
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...Traits.MapImplInstance<T>,
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]>
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>,
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ConstructorParameters<Superclass>
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> &
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Pipe<T, [
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Tuples.Map<Trait.OwnImplClassFn>, // Map all the traits to their implementation class
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Tuples.Prepend<Superclass>, // Add the superclass at the top of the list
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Tuples.Map<StaticMembersFn>, // Map all the classes to an object containing their static members
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ExtendFn, // Reduce to a single object that extends all the objects in the list
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SimplifyFn, // Make readable for IDEs
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Simplify<
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ExtendPlain<[
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StaticMembers<Superclass>,
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...Traits.MapImplStaticMembers<T>,
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]>
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>
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) {
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return this.traits.reduce(
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(previous, trait) => trait.apply(previous),
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@@ -85,18 +83,12 @@ export namespace TraitExpression {
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? Superclass
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: never
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)
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export interface SuperclassFn extends Fn {
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return: TraitExpression.Superclass<this["arg0"]>
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}
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export type Traits<T> = (
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T extends TraitExpression<any, infer Traits>
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? Traits
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: never
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)
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export interface TraitsFn extends Fn {
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return: TraitExpression.Traits<this["arg0"]>
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}
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}
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