Thilawyn/traitify-ts
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

0.1.4 (#4)
All checks were successful
continuous-integration/drone/push Build is passing
Details

Browse Source 
Co-authored-by: Julien Valverdé <julien.valverde@mailo.com>
Reviewed-on: https://git.jvalver.de/Thilawyn/traitify-ts/pulls/4
This commit was merged in pull request #4.
This commit is contained in:
Julien Valverdé
2024-02-20 01:39:38 +01:00
parent c1c3c07524
commit de3b23018a
11 changed files with 535 additions and 362 deletions
Download Patch File Download Diff File Expand all files Collapse all files

BIN
bun.lockb
View File

Binary file not shown.

11
package.json
View File

@@ -1,6 +1,6 @@
{ {
"name": "@thilawyn/traitify-ts", "name": "@thilawyn/traitify-ts",
"version": "0.1.3", "version": "0.1.4",
"type": "module", "type": "module",
"publishConfig": { "publishConfig": {
"registry": "https://git.jvalver.de/api/packages/thilawyn/npm/" "registry": "https://git.jvalver.de/api/packages/thilawyn/npm/"
@@ -28,18 +28,19 @@
"clean:node": "rm -rf node_modules" "clean:node": "rm -rf node_modules"
}, },
"dependencies": { "dependencies": {
"hotscript": "^1.0.13", "lodash-es": "^4.17.21",
"type-fest": "^4.10.2" "type-fest": "^4.10.2"
}, },
"devDependencies": { "devDependencies": {
"@rollup/plugin-node-resolve": "^15.2.3", "@rollup/plugin-node-resolve": "^15.2.3",
"@types/lodash-es": "^4.17.12",
"bun-types": "latest", "bun-types": "latest",
"npm-check-updates": "^16.14.14", "npm-check-updates": "^16.14.15",
"npm-sort": "^0.0.4", "npm-sort": "^0.0.4",
"rollup": "^4.9.6", "rollup": "^4.12.0",
"rollup-plugin-cleanup": "^3.2.1", "rollup-plugin-cleanup": "^3.2.1",
"rollup-plugin-ts": "^3.4.5", "rollup-plugin-ts": "^3.4.5",
"tsx": "^4.7.0", "tsx": "^4.7.1",
"typescript": "^5.3.3" "typescript": "^5.3.3"
} }
} }

231
src/Trait.ts
View File

@@ -1,157 +1,136 @@
import { Fn, Pipe, Tuples } from "hotscript" import { AbstractClass, Class, Simplify } from "type-fest"
import { AbstractClass, Class, Opaque } from "type-fest" import { TraitExpression } from "./TraitExpression"
import { TraitExpression, emptyTraitExpression } from "./TraitExpression" import { Extend, StaticMembers } from "./util"
import { AbstractTag } from "./abstract"
import { ExtendFn, SimplifyFn, StaticMembers, StaticMembersFn } from "./util"
export type TraitApplierSuperTag = "@thilawyn/traitify-ts/TraitApplierSuper"
export type AddAbstractToImplClass<
ImplClass extends Class<{}, []>,
Abstract extends {},
> = (
Class<
Abstract & InstanceType<ImplClass>,
ConstructorParameters<ImplClass>
> &
StaticMembers<ImplClass>
)
export type RemoveAbstractFromImplClass<
ImplClassWithAbstract extends Class<Abstract, []> & { _tag: TraitApplierSuperTag },
Abstract extends {},
> = (
Class<
Omit<InstanceType<ImplClassWithAbstract>, keyof Abstract>,
ConstructorParameters<ImplClassWithAbstract>
> &
Omit<StaticMembers<ImplClassWithAbstract>, "_tag">
)
export class Trait< export class Trait<
Supertraits extends TraitExpression<typeof TraitExpression.NullSuperclass, Trait<any, any, any>[], Trait<any, any, any>[]>, SuperExpression extends TraitExpression<
Abstract extends {}, typeof TraitExpression.NullSuperclass,
ImplClass extends Class<{}, []>, Trait<any, any, any, any>[]
>,
Abstract extends object,
StaticAbstract extends object,
ImplClass extends AbstractClass<object, []>,
> { > {
constructor( constructor(
readonly supertraits: Supertraits, readonly superExpression: SuperExpression,
readonly abstract: Abstract, readonly abstract: Abstract,
readonly apply: (Super: AbstractClass<{}>) => ImplClass, readonly staticAbstract: StaticAbstract,
readonly apply: (Super: AbstractClass<object>) => ImplClass,
) {} ) {}
} }
export namespace Trait { export namespace Trait {
export type OwnSupertraits<T> = ( export type SuperExpression<T> = (
T extends Trait<infer Supertraits, any, any> T extends Trait<infer SuperExpression, any, any, any>
? Supertraits ? SuperExpression
: never : never
) )
export interface OwnSupertraitsFn extends Fn {
return: Trait.OwnSupertraits<this["arg0"]>
}
export type OwnAbstract<T> = ( export type Supertraits<T> = (
T extends Trait<any, infer Abstract, any> TraitExpression.Traits<Trait.SuperExpression<T>>
)
export type Abstract<T> = (
T extends Trait<any, infer Abstract, any, any>
? Abstract ? Abstract
: never : never
) )
export interface OwnAbstractFn extends Fn {
return: Trait.OwnAbstract<this["arg0"]>
}
export type OwnImplClass<T> = ( export type StaticAbstract<T> = (
T extends Trait<any, any, infer ImplClass> T extends Trait<any, any, infer StaticAbstract, any>
? StaticAbstract
: never
)
export type ImplClass<T> = (
T extends Trait<any, any, any, infer ImplClass>
? ImplClass ? ImplClass
: never : never
) )
export interface OwnImplClassFn extends Fn {
return: Trait.OwnImplClass<this["arg0"]>
}
export type OwnImplInstance<T> = ( export type ImplInstance<T> = (
T extends Trait<any, any, infer ImplClass> InstanceType<Trait.ImplClass<T>>
? InstanceType<ImplClass>
: never
) )
export interface OwnImplInstanceFn extends Fn {
return: Trait.OwnImplInstance<this["arg0"]>
}
export type OwnClass<T> = ( export type ImplStaticMembers<T> = (
T extends Trait<any, infer Abstract, infer ImplClass> StaticMembers<Trait.ImplClass<T>>
? AddAbstractToImplClass<ImplClass, Abstract>
: never
) )
export interface OwnClassFn extends Fn {
return: Trait.OwnClass<this["arg0"]>
}
export type OwnInstance<T> = (
T extends Trait<any, infer Abstract, infer ImplClass>
? InstanceType<
AddAbstractToImplClass<ImplClass, Abstract>
>
: never
)
export interface OwnInstanceFn extends Fn {
return: Trait.OwnInstance<this["arg0"]>
}
export type Supertraits<T> = (
T extends Trait<infer Supertraits, any, any>
? TraitExpression.AllTraits<Supertraits>
: never
)
export interface SupertraitsFn extends Fn {
return: Trait.Supertraits<this["arg0"]>
}
export type Class<T> = (
AbstractClass<
Trait.Instance<T>,
any[]
> &
Pipe<T, [
Trait.SupertraitsFn,
Tuples.Append<T>,
Tuples.Map<Trait.OwnClassFn>,
Tuples.Map<StaticMembersFn>,
ExtendFn,
SimplifyFn,
]>
)
export interface ClassFn extends Fn {
return: Trait.Class<this["arg0"]>
}
export type Instance<T> = ( export type Instance<T> = (
Pipe<T, [ Extend<[
Trait.SupertraitsFn, Trait.Abstract<T>,
Tuples.Append<T>, Trait.ImplInstance<T>,
Tuples.Map<Trait.OwnInstanceFn>,
ExtendFn,
SimplifyFn,
]> ]>
) )
export interface InstanceFn extends Fn {
return: Trait.Instance<this["arg0"]>
}
}
export type Static<T> = (
export function trait< Extend<[
Abstract extends {}, Trait.StaticAbstract<T>,
ImplClassWithAbstract extends Class<Abstract, []> & { _tag: TraitApplierSuperTag }, Trait.ImplStaticMembers<T>,
>( ]>
abstract: Opaque<Abstract, AbstractTag>,
apply: (Super: AbstractClass<Abstract> & { _tag: TraitApplierSuperTag }) => ImplClassWithAbstract,
) {
return new Trait(
emptyTraitExpression,
abstract as Abstract,
apply as any as (Super: AbstractClass<{}>) => RemoveAbstractFromImplClass<ImplClassWithAbstract, Abstract>,
) )
} }
export namespace TraitTuple {
export type MapAbstract<T> = {
[K in keyof T]: K extends keyof []
? T[K]
: Trait.Abstract<T[K]>
}
export type MapStaticAbstract<T> = {
[K in keyof T]: K extends keyof []
? T[K]
: Trait.StaticAbstract<T[K]>
}
export type MapImplClass<T> = {
[K in keyof T]: K extends keyof []
? T[K]
: Trait.ImplClass<T[K]>
}
export type MapImplInstance<T> = {
[K in keyof T]: K extends keyof []
? T[K]
: Trait.ImplInstance<T[K]>
}
export type MapImplStaticMembers<T> = {
[K in keyof T]: K extends keyof []
? T[K]
: Trait.ImplStaticMembers<T[K]>
}
export type MapInstance<T> = {
[K in keyof T]: K extends keyof []
? T[K]
: Trait.Instance<T[K]>
}
export type MapStaticMembers<T> = {
[K in keyof T]: K extends keyof []
? T[K]
: Trait.Static<T[K]>
}
}
export type TraitClass<T extends Trait<any, any, any, any>> = (
AbstractClass<TraitInstance<T>, any[]> &
TraitStaticMembers<T>
)
export type TraitConcreteClass<T extends Trait<any, any, any, any>> = (
Class<TraitInstance<T>, any[]> &
TraitStaticMembers<T>
)
export type TraitInstance<T extends Trait<any, any, any, any>> = (
Simplify<Trait.Instance<T>>
)
export type TraitStaticMembers<T extends Trait<any, any, any, any>> = (
Simplify<Trait.Static<T>>
)

121
src/TraitBuilder.ts Normal file
View File

@@ -0,0 +1,121 @@
import { AbstractClass, Simplify } from "type-fest"
import { Trait } from "./Trait"
import { TraitExpression } from "./TraitExpression"
import { Extend, StaticMembers } from "./util"
declare const implSuperSymbol: unique symbol
type ImplSuper<This> = (
This extends TraitBuilder<
any,
infer Abstract,
infer StaticAbstract,
infer ImplClass
>
? (
AbstractClass<
Simplify<
Extend<[
Abstract,
InstanceType<ImplClass>,
]>
>
> &
Simplify<
Extend<[
StaticAbstract,
StaticMembers<ImplClass>,
]>
> &
{ readonly [implSuperSymbol]: true }
)
: never
)
export class TraitBuilder<
SuperExpression extends TraitExpression<
typeof TraitExpression.NullSuperclass,
Trait<any, any, any, any>[]
>,
Abstract extends object,
StaticAbstract extends object,
ImplClass extends AbstractClass<object, []>,
> {
constructor(
private readonly traitSuperExpression: SuperExpression,
private readonly traitAbstract: Abstract,
private readonly traitStaticAbstract: StaticAbstract,
private readonly traitApply: (Super: AbstractClass<object>) => ImplClass,
) {}
abstract<A extends Abstract>(
_: (Super: AbstractClass<Abstract>) => AbstractClass<A, []>
) {
return new TraitBuilder(
this.traitSuperExpression,
{} as Simplify<A>,
this.traitStaticAbstract,
this.traitApply,
)
}
staticAbstract<A extends StaticAbstract>(
_: (Super: AbstractClass<StaticAbstract>) => AbstractClass<A, []>
) {
return new TraitBuilder(
this.traitSuperExpression,
this.traitAbstract,
{} as Simplify<A>,
this.traitApply,
)
}
implement<
ImplClassWithAbstract extends ImplSuper<typeof this> // TODO: find a way to set the constraint to concrete classes while keeping the Super arg as an abstract class
>(
apply: (Super: ImplSuper<typeof this>) => ImplClassWithAbstract
) {
return new TraitBuilder(
this.traitSuperExpression,
this.traitAbstract,
this.traitStaticAbstract,
apply as unknown as (Super: AbstractClass<object>) => (
AbstractClass<
Simplify<
Omit<
InstanceType<ImplClassWithAbstract>,
keyof Abstract
>
>
> &
Simplify<
Omit<
StaticMembers<ImplClassWithAbstract>,
keyof StaticAbstract | typeof implSuperSymbol
>
>
),
)
}
build() {
return new Trait(
this.traitSuperExpression,
this.traitAbstract,
this.traitStaticAbstract,
this.traitApply,
)
}
}
export const trait = new TraitBuilder(
new TraitExpression(TraitExpression.NullSuperclass, []),
{} as object,
{} as object,
Super => class extends Super {} as AbstractClass<object>,
)

180
src/TraitExpression.ts
View File

@@ -1,113 +1,163 @@
import { Fn, Pipe, Tuples } from "hotscript" import { AbstractClass, Class, Simplify } from "type-fest"
import { AbstractClass, Class, Opaque } from "type-fest" import { Trait, TraitTuple } from "./Trait"
import { RemoveAbstractFromImplClass, Trait, TraitApplierSuperTag } from "./Trait" import { TraitBuilder } from "./TraitBuilder"
import { AbstractTag } from "./abstract" import { Extend, StaticMembers } from "./util"
import { ExtendFn, SimplifyFn, StaticMembersFn } from "./util"
// type RemoveSupertraitsAbstractFromAbstract<Left, Right> = {
// [Key in Extract<keyof Left, keyof Right>]: Left[Key]
// } & {
// [Key in Exclude<keyof Left, keyof Right>]: Left[Key]
// }
export class TraitExpression< export class TraitExpression<
Superclass extends AbstractClass<{}>, Superclass extends AbstractClass<object>,
const OwnTraits extends Trait<any, any, any>[], const Traits extends Trait<any, any, any, any>[],
const AllTraits extends Trait<any, any, any>[],
> { > {
constructor( constructor(
readonly superclass: Superclass, readonly superclass: Superclass,
readonly ownTraits: OwnTraits, readonly traits: Traits,
readonly allTraits: AllTraits,
) {} ) {}
get extends(): ( get extends(): (
AbstractClass< AbstractClass<
Pipe<AllTraits, [ InstanceType<Superclass> & // Keep the instance of the superclass outside of any kind of type manipulation
Tuples.Map<Trait.OwnImplInstanceFn>, // Map all the traits to the instance of their implementation class // as it can accidentely remove abstract properties
Tuples.Prepend<InstanceType<Superclass>>, // Add the instance of the superclass at the top of the list Simplify<
ExtendFn, // Reduce to a single instance that extends all the instances in the list Extend<
SimplifyFn, // Make readable for IDEs TraitTuple.MapImplInstance<Traits>
]>, >
>,
ConstructorParameters<Superclass> ConstructorParameters<Superclass>
> & > &
Pipe<AllTraits, [ Simplify<
Tuples.Map<Trait.OwnImplClassFn>, // Map all the traits to their implementation class Extend<[
Tuples.Prepend<Superclass>, // Add the superclass at the top of the list StaticMembers<Superclass>,
Tuples.Map<StaticMembersFn>, // Map all the classes to an object containing their static members ...TraitTuple.MapImplStaticMembers<Traits>,
ExtendFn, // Reduce to a single object that extends all the objects in the list
SimplifyFn, // Make readable for IDEs
]> ]>
>
) { ) {
return this.allTraits.reduce( return this.traits.reduce(
(previous, trait) => trait.apply(previous), (previous, trait) => trait.apply(previous),
this.superclass, this.superclass,
) as any ) as any
} }
implementsStatic(target: ImplementsStatic<typeof this>, context: any) {}
subtrait< subtrait<
This extends TraitExpression<typeof TraitExpression.NullSuperclass, any, any>, This extends TraitExpression<typeof TraitExpression.NullSuperclass, any>
SubtraitAbstract extends Implements<This>,
SubtraitImplClassWithAbstract extends Class<SubtraitAbstract, []> & { _tag: TraitApplierSuperTag },
>( >(
this: This, this: This
abstract: (expression: This) => Opaque<SubtraitAbstract, AbstractTag>,
apply: (Super: AbstractClass<SubtraitAbstract> & { _tag: TraitApplierSuperTag }) => SubtraitImplClassWithAbstract,
) { ) {
return new Trait( return new TraitBuilder<
This,
Simplify<
Extend<TraitTuple.MapAbstract<Traits>>
>,
Simplify<
Extend<TraitTuple.MapStaticAbstract<Traits>>
>,
AbstractClass<
Simplify<
Extend<TraitTuple.MapImplInstance<Traits>>
>
> &
Simplify<
Extend<TraitTuple.MapImplStaticMembers<Traits>>
>
>(
this, this,
// {} as RemoveSupertraitsAbstractFromAbstract<SubtraitAbstract, Implements<typeof this>>, {} as any,
{} as SubtraitAbstract, // TODO: find a way to cleanly substract Implements<typeof this> from this. {} as any,
apply as any as (Super: AbstractClass<{}>) => RemoveAbstractFromImplClass<SubtraitImplClassWithAbstract, SubtraitAbstract>, Super => class extends Super {} as any,
) )
} }
} }
export namespace TraitExpression { export namespace TraitExpression {
declare const nullSuperclassSymbol: unique symbol
export class NullSuperclass { export class NullSuperclass {
static readonly _tag = "@thilawyn/traitify-ts/TraitExpression.NullSuperclass" static readonly [nullSuperclassSymbol]: true
constructor(...args: any[]) {}
} }
export type Superclass<T> = ( export type Superclass<T> = (
T extends TraitExpression<infer Superclass, any, any> T extends TraitExpression<infer Superclass, any>
? Superclass ? Superclass
: never : never
) )
export interface SuperclassFn extends Fn {
return: TraitExpression.Superclass<this["arg0"]>
}
export type OwnTraits<T> = ( export type Traits<T> = (
T extends TraitExpression<any, infer OwnTraits, any> T extends TraitExpression<any, infer Traits>
? OwnTraits ? Traits
: never : never
) )
export interface OwnTraitsFn extends Fn {
return: TraitExpression.OwnTraits<this["arg0"]>
} }
export type AllTraits<T> = (
T extends TraitExpression<any, any, infer AllTraits> export type Implements<
? AllTraits Exp extends TraitExpression<any, Trait<any, any, any, any>[]>
: never > = (
Simplify<
Extend<
TraitTuple.MapAbstract<
TraitExpression.Traits<Exp>
>
>
>
) )
export interface AllTraitsFn extends Fn {
return: TraitExpression.AllTraits<this["arg0"]>
}
}
export const emptyTraitExpression = new TraitExpression(TraitExpression.NullSuperclass, [], []) export type ImplementsStatic<
Exp extends TraitExpression<any, Trait<any, any, any, any>[]>
> = (
Simplify<
Extend<
TraitTuple.MapStaticAbstract<
TraitExpression.Traits<Exp>
>
>
>
)
export type Implements<Exp extends TraitExpression<any, any, any>> = ( export type TraitExpressionClass<
Pipe<Exp, [ Exp extends TraitExpression<any, Trait<any, any, any, any>[]>
TraitExpression.AllTraitsFn, > = (
Tuples.Map<Trait.OwnAbstractFn>, AbstractClass<
ExtendFn, TraitExpressionInstance<Exp>,
SimplifyFn, ConstructorParameters<TraitExpression.Superclass<Exp>>
> &
TraitExpressionStaticMembers<Exp>
)
export type TraitExpressionConcreteClass<
Exp extends TraitExpression<any, Trait<any, any, any, any>[]>
> = (
Class<
TraitExpressionInstance<Exp>,
ConstructorParameters<TraitExpression.Superclass<Exp>>
> &
TraitExpressionStaticMembers<Exp>
)
export type TraitExpressionInstance<
Exp extends TraitExpression<any, Trait<any, any, any, any>[]>
> = (
InstanceType<TraitExpression.Superclass<Exp>> & // Keep the instance of the superclass outside of any kind of type manipulation
// as it can accidentely remove abstract properties
Simplify<
Extend<
TraitTuple.MapInstance<TraitExpression.Traits<Exp>>
>
>
)
export type TraitExpressionStaticMembers<
Exp extends TraitExpression<any, Trait<any, any, any, any>[]>
> = (
Simplify<
Extend<[
StaticMembers<TraitExpression.Superclass<Exp>>,
...TraitTuple.MapStaticMembers<TraitExpression.Traits<Exp>>,
]> ]>
>
) )

153
src/TraitExpressionBuilder.ts
View File

@@ -1,129 +1,120 @@
import { Call, Fn, Pipe, Tuples } from "hotscript" import { uniq } from "lodash-es"
import { AbstractClass } from "type-fest" import { AbstractClass } from "type-fest"
import { Trait } from "./Trait" import { Trait, TraitTuple } from "./Trait"
import { TraitExpression, emptyTraitExpression } from "./TraitExpression" import { TraitExpression } from "./TraitExpression"
import { ExtendableFn, StaticMembersFn } from "./util" import { Extendable, StaticMembers } from "./util"
type SpreadSupertraits<Traits extends Trait<any, any, any>[]> = ( type SpreadSupertraits<T> = (
Call< T extends [infer Trait, ...infer Rest]
Tuples.FlatMap<PrependTraitSupertraitsFn>, ? [
Traits ...Trait.Supertraits<Trait>,
> Trait,
...SpreadSupertraits<Rest>,
]
: []
) )
interface PrependTraitSupertraitsFn extends Fn {
return: [...Trait.Supertraits<this["arg0"]>, this["arg0"]]
}
type AbstractMembersExtendable< type InstanceExtendable<
Superclass extends AbstractClass<{}>, Superclass extends AbstractClass<object>,
Traits extends Trait<any, any, any>[], Traits extends Trait<any, any, any, any>[],
> = ( > = (
Pipe<Traits, [ Extendable<[
Tuples.Map<Trait.OwnAbstractFn>, InstanceType<Superclass>,
Tuples.Prepend<InstanceType<Superclass>>, ...TraitTuple.MapInstance<Traits>,
]> ]>
) )
type ImplInstanceExtendable< type StaticMembersExtendable<
Superclass extends AbstractClass<{}>, Superclass extends AbstractClass<object>,
Traits extends Trait<any, any, any>[], Traits extends Trait<any, any, any, any>[],
> = ( > = (
Pipe<Traits, [ Extendable<[
Tuples.Map<Trait.OwnImplInstanceFn>, StaticMembers<Superclass>,
Tuples.Prepend<InstanceType<Superclass>>, ...TraitTuple.MapStaticMembers<Traits>,
]>
)
type ImplStaticMembersExtendable<
Superclass extends AbstractClass<{}>,
Traits extends Trait<any, any, any>[],
> = (
Pipe<Traits, [
Tuples.Map<Trait.OwnImplClassFn>,
Tuples.Prepend<Superclass>,
Tuples.Map<StaticMembersFn>,
ExtendableFn,
]> ]>
) )
type BuildTraitExpression< type BuildTraitExpression<
Superclass extends AbstractClass<{}>, Superclass extends AbstractClass<object>,
OwnTraits extends Trait<any, any, any>[], Traits extends Trait<any, any, any, any>[],
AllTraits extends Trait<any, any, any>[],
> = ( > = (
AbstractMembersExtendable<Superclass, AllTraits> extends false InstanceExtendable<Superclass, Traits> extends false
? "Type conflict between the traits abstract members and/or the superclass instance." ? "Type conflict on the instance side."
: ImplInstanceExtendable<Superclass, AllTraits> extends false : StaticMembersExtendable<Superclass, Traits> extends false
? "Type conflict between the traits implementation instances and/or the superclass instance." ? "Type conflict on the static side."
: ImplStaticMembersExtendable<Superclass, AllTraits> extends false : TraitExpression<Superclass, Traits>
? "Type conflict between the traits implementation static members and/or the superclass static members."
: TraitExpression<Superclass, OwnTraits, AllTraits>
) )
class TraitExpressionBuilder< class TraitExpressionBuilder<
Superclass extends AbstractClass<{}>, Superclass extends AbstractClass<object>,
const OwnTraits extends Trait<any, any, any>[], const Traits extends Trait<any, any, any, any>[],
const AllTraits extends Trait<any, any, any>[],
> { > {
constructor(private expression: TraitExpression<Superclass, OwnTraits, AllTraits>) {} constructor(
private readonly expressionSuperclass: Superclass,
private readonly expressionTraits: Traits,
) {}
extends< extends<
Super extends AbstractClass<any> Super extends AbstractClass<object>
>( >(
superclass: Super superclass: Super
) { ) {
return new TraitExpressionBuilder( return new TraitExpressionBuilder(
new TraitExpression(
superclass, superclass,
this.expression.ownTraits, this.expressionTraits,
this.expression.allTraits,
)
) )
} }
expresses< expresses<
const Traits extends Trait<any, any, any>[] const T extends Trait<
>( TraitExpression<
...traits: Traits typeof TraitExpression.NullSuperclass,
): TraitExpressionBuilder< Trait<any, any, any, any>[]
Superclass, >,
[...OwnTraits, ...Traits], any,
[...AllTraits, ...SpreadSupertraits<Traits>]
> {
return new TraitExpressionBuilder(
new TraitExpression(
this.expression.superclass,
[...this.expression.ownTraits, ...traits],
[...this.expression.allTraits, ...this.spreadSupertraits(traits)],
)
)
}
private spreadSupertraits<
const Traits extends Trait<
TraitExpression<any, any, Trait<any, any, any>[]>,
any, any,
any any
>[] >[]
>( >(
traits: Traits ...traits: T
) { ) {
return traits.flatMap(trait => [ return new TraitExpressionBuilder(
...trait.supertraits.allTraits, this.expressionSuperclass,
uniq([
...this.expressionTraits,
...traits.flatMap(trait => [
...trait.superExpression.traits,
trait, trait,
]) as SpreadSupertraits<Traits> ]),
]) as [...Traits, ...SpreadSupertraits<T>],
)
} }
build() { build() {
return this.expression as BuildTraitExpression<Superclass, OwnTraits, AllTraits> return new TraitExpression(
this.expressionSuperclass,
this.expressionTraits,
) as BuildTraitExpression<Superclass, Traits>
} }
then<V>(fn: (expression: ReturnType<typeof this.build>) => V): V { then<V>(fn: (expression: ReturnType<typeof this.build>) => V): V {
return fn(this.build()) return fn(this.build())
} }
buildAnyway() {
return new TraitExpression(
this.expressionSuperclass,
this.expressionTraits,
)
} }
export const expression = new TraitExpressionBuilder(emptyTraitExpression) thenAnyway<V>(fn: (expression: ReturnType<typeof this.buildAnyway>) => V): V {
return fn(this.buildAnyway())
}
}
export const expression = new TraitExpressionBuilder(TraitExpression.NullSuperclass, [])

10
src/abstract.ts
View File

@@ -1,10 +0,0 @@
import { Opaque } from "type-fest"
export type AbstractTag = "@thilawyn/traitify-ts/Abstract"
export function abstract<
Abstract extends {} = {}
>() {
return {} as Opaque<Abstract, AbstractTag>
}

6
src/lib.ts
View File

@@ -1,4 +1,4 @@
export { trait, type Trait } from "./Trait" export { Trait, TraitClass, TraitConcreteClass, TraitInstance, TraitStaticMembers, TraitTuple } from "./Trait"
export { Implements, type TraitExpression } from "./TraitExpression" export { TraitBuilder, trait } from "./TraitBuilder"
export { Implements, ImplementsStatic, TraitExpression, TraitExpressionClass, TraitExpressionConcreteClass, TraitExpressionInstance, TraitExpressionStaticMembers } from "./TraitExpression"
export { expression } from "./TraitExpressionBuilder" export { expression } from "./TraitExpressionBuilder"
export { abstract } from "./abstract"

77
src/tests.ts
View File

@@ -1,67 +1,61 @@
import { Trait, trait } from "./Trait" import { TraitClass } from "./Trait"
import { Implements } from "./TraitExpression" import { trait } from "./TraitBuilder"
import { Implements, ImplementsStatic, TraitExpressionClass } from "./TraitExpression"
import { expression } from "./TraitExpressionBuilder" import { expression } from "./TraitExpressionBuilder"
import { abstract } from "./abstract"
const PrintsHelloOnNew = trait( const PrintsHelloOnNew = trait
abstract(), .implement(Super => class PrintsHelloOnNew extends Super {
Super => class PrintsHelloOnNew extends Super {
static readonly isPrintsHelloOnNew = true static readonly isPrintsHelloOnNew = true
constructor(...args: any[]) { constructor(...args: any[]) {
super(...args) super(...args)
console.log("Hello!") console.log("Hello!")
} }
}, })
) .build()
type PrintsHelloOnNewClass = Trait.Class<typeof PrintsHelloOnNew>
const Identifiable = <ID>() => trait( type PrintsHelloOnNewClass = TraitClass<typeof PrintsHelloOnNew>
abstract<{ readonly id: ID }>(),
Super => class Identifiable extends Super { const Identifiable = <ID>() => trait
.abstract(Super => class extends Super {
declare readonly id: ID
})
.implement(Super => class Identifiable extends Super {
equals(el: Identifiable) { equals(el: Identifiable) {
return this.id === el.id return this.id === el.id
} }
}, })
) .build()
const StatefulSubscription = trait( const StatefulSubscription = trait
abstract<{ .abstract(Super => class extends Super {
readonly isStatefulSubscription: true declare readonly isStatefulSubscription: true
readonly status: ( declare readonly status: (
{ _tag: "awaitingPayment" } | { _tag: "awaitingPayment" } |
{ _tag: "active", activeSince: Date, expiresAt?: Date } | { _tag: "active", activeSince: Date, expiresAt?: Date } |
{ _tag: "expired", expiredSince: Date } { _tag: "expired", expiredSince: Date }
) )
}>(), })
.build()
Super => class StatefulSubscription extends Super {}, type StatefulSubscriptionClass = TraitClass<typeof StatefulSubscription>
)
type StatefulSubscriptionClass = Trait.Class<typeof StatefulSubscription>
const ActiveStatefulSubscription = expression const ActiveStatefulSubscription = expression
.expresses(StatefulSubscription) .expresses(StatefulSubscription)
.build() .build()
.subtrait( .subtrait()
exp => { .abstract(Super => class extends Super {
interface IActiveStatefulSubscription extends Implements<typeof exp> { declare readonly isActiveStatefulSubscription: true
readonly isActiveStatefulSubscription: true declare readonly status: { _tag: "active", activeSince: Date, expiresAt?: Date }
readonly status: { _tag: "active", activeSince: Date, expiresAt?: Date } })
} .build()
return abstract<IActiveStatefulSubscription>()
},
Super => class ActiveStatefulSubscription extends Super {},
)
type ActiveStatefulSubscriptionClass = Trait.Class<typeof ActiveStatefulSubscription>
type ActiveStatefulSubscriptionClass = TraitClass<typeof ActiveStatefulSubscription>
class TestSuperclass { class TestSuperclass {
// id: number = 69 // id: number = 69
// static test = 69 static test = 69
} }
const exp = expression const exp = expression
@@ -75,7 +69,10 @@ const exp = expression
.build() .build()
type Abs = Implements<typeof exp> type Abs = Implements<typeof exp>
type AbsStatic = ImplementsStatic<typeof exp>
type ExpClass = TraitExpressionClass<typeof exp>
@exp.implementsStatic
class User extends exp.extends implements Implements<typeof exp> { class User extends exp.extends implements Implements<typeof exp> {
readonly isStatefulSubscription: true = true readonly isStatefulSubscription: true = true
readonly isActiveStatefulSubscription: true = true readonly isActiveStatefulSubscription: true = true
@@ -84,3 +81,9 @@ class User extends exp.extends implements Implements<typeof exp> {
} }
console.log(new User()) console.log(new User())
// type T = NonExtendableKeys<[
// { prout: "gneugneu" },
// { prout: string },
// ]>

80
src/util/extend.ts
View File

@@ -1,25 +1,71 @@
import { Call, ComposeLeft, Fn, Match, Tuples } from "hotscript"
import { CommonKeys } from "." import { CommonKeys } from "."
type ExtendReducer<Super, Self> = ( // type ExtendReducer<Super, Self> = (
Pick<Self, CommonKeys<Self, Super>> extends Pick<Super, CommonKeys<Self, Super>> // Pick<Self, CommonKeys<Self, Super>> extends Pick<Super, CommonKeys<Self, Super>>
? Omit<Super, CommonKeys<Self, Super>> & Self // ? Omit<Super, CommonKeys<Self, Super>> & Self
// : never
// )
// interface ExtendReducerFn extends Fn {
// return: ExtendReducer<this["arg0"], this["arg1"]>
// }
// export type ExtendFn = Tuples.Reduce<ExtendReducerFn, {}>
// export type ExtendableFn = ComposeLeft<[
// ExtendFn,
// Match<[
// Match.With<never, false>,
// Match.With<any, true>,
// ]>
// ]>
// TODO: use OverrideProperties from type-fest?
export type Extend<T extends readonly object[]> = (
T extends [
infer Super,
infer Self,
...infer Rest extends object[],
]
? Pick<Self, CommonKeys<Self, Super>> extends Pick<Super, CommonKeys<Self, Super>>
? Extend<[
Omit<Super, CommonKeys<Self, Super>> & Self,
...Rest,
]>
: never : never
: T extends [infer Self]
? Self
: {}
) )
interface ExtendReducerFn extends Fn {
return: ExtendReducer<this["arg0"], this["arg1"]>
}
export type ExtendFn = Tuples.Reduce<ExtendReducerFn, {}> export type Extendable<T extends readonly object[]> = (
export type Extend<T extends {}[]> = Call<ExtendFn, T> T extends [
infer Super,
infer Self,
export type ExtendableFn = ComposeLeft<[ ...infer Rest extends object[],
ExtendFn, ]
Match<[ ? Pick<Self, CommonKeys<Self, Super>> extends Pick<Super, CommonKeys<Self, Super>>
Match.With<never, false>, ? Extendable<[
Match.With<any, true>, Omit<Super, CommonKeys<Self, Super>> & Self,
...Rest,
]> ]>
: false
: true
)
export type NonExtendableKeys<T extends readonly object[]> = (
T extends [
infer Super extends object,
infer Self extends object,
...infer Rest extends object[],
]
? {[K in keyof Super & keyof Self]: Self[K] extends Super[K]
? never
: K
}[keyof Super & keyof Self]
| NonExtendableKeys<[
Super & Self,
...Rest,
]> ]>
export type Extendable<T extends {}[]> = Call<ExtendableFn, T> : void
)

10
src/util/misc.ts
View File

@@ -1,5 +1,4 @@
import { Fn } from "hotscript" import { AbstractClass } from "type-fest"
import { AbstractClass, Simplify } from "type-fest"
/** /**
@@ -9,10 +8,6 @@ import { AbstractClass, Simplify } from "type-fest"
*/ */
export type CommonKeys<A, B> = Extract<keyof A, keyof B> export type CommonKeys<A, B> = Extract<keyof A, keyof B>
export interface SimplifyFn extends Fn {
return: Simplify<this["arg0"]>
}
/** /**
* Represents the static members of a class. * Represents the static members of a class.
* @template Class - A class extending AbstractClass. * @template Class - A class extending AbstractClass.
@@ -20,6 +15,3 @@ export interface SimplifyFn extends Fn {
export type StaticMembers<Class extends AbstractClass<any>> = ( export type StaticMembers<Class extends AbstractClass<any>> = (
Omit<Class, "prototype"> Omit<Class, "prototype">
) )
export interface StaticMembersFn extends Fn {
return: StaticMembers<this["arg0"]>
}