You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
104 lines
3.0 KiB
104 lines
3.0 KiB
/** Type alias for something that may or may not be wrapped in a promise. */
|
|
export type Awaitable<T> = T | Promise<T>
|
|
|
|
/** Type alias for something that may be undefined. */
|
|
export type Maybe<T> = T | undefined
|
|
|
|
export type MaybeArr<T extends [...any[]]> = {
|
|
[Index in keyof T]: Maybe<T[Index]>
|
|
} & {length: T['length']}
|
|
|
|
export type Either<T1, T2> = Left<T1> | Right<T2>
|
|
|
|
export type Left<T> = [T, undefined]
|
|
|
|
export type Right<T> = [undefined, T]
|
|
|
|
export function isLeft<T1, T2>(what: Either<T1, T2>): what is Left<T1> {
|
|
return typeof what[1] === 'undefined'
|
|
}
|
|
|
|
export function isRight<T1, T2>(what: Either<T1, T2>): what is Right<T2> {
|
|
return typeof what[0] === 'undefined'
|
|
}
|
|
|
|
export function left<T>(what: T): Left<T> {
|
|
return [what, undefined]
|
|
}
|
|
|
|
export function right<T>(what: T): Right<T> {
|
|
return [undefined, what]
|
|
}
|
|
|
|
export function unleft<T>(what: Left<T>): T {
|
|
return what[0]
|
|
}
|
|
|
|
export function unright<T>(what: Right<T>): T {
|
|
return what[1]
|
|
}
|
|
|
|
/** Type alias for a callback that accepts a typed argument. */
|
|
export type ParameterizedCallback<T> = ((arg: T) => any)
|
|
|
|
/** A key-value form of a given type. */
|
|
export type KeyValue<T> = {key: string, value: T}
|
|
|
|
/** Simple helper method to verify that a key is a keyof some object. */
|
|
export function isKeyof<T>(key: unknown, obj: T): key is keyof T {
|
|
if ( typeof key !== 'string' && typeof key !== 'symbol' ) {
|
|
return false
|
|
}
|
|
|
|
return key in obj
|
|
}
|
|
|
|
/** A typescript-compatible version of Object.hasOwnProperty. */
|
|
export function hasOwnProperty<X extends {}, Y extends PropertyKey>(obj: X, prop: Y): obj is X & Record<Y, unknown> { // eslint-disable-line @typescript-eslint/ban-types
|
|
return Object.hasOwnProperty.call(obj, prop)
|
|
}
|
|
|
|
/**
|
|
* TypeScript helper for creating tagged-types.
|
|
*/
|
|
export interface TypeTag<S extends string> {
|
|
readonly __typeTag: S
|
|
}
|
|
|
|
export type PrefixTypeArray<T, TArr extends unknown[]> = [T, ...TArr]
|
|
export type SuffixTypeArray<TArr extends unknown[], T> = [...TArr, T]
|
|
export type TypeArraySignature<TArr extends unknown[], TReturn> = (...params: TArr) => TReturn
|
|
|
|
export type MethodsOf<T, TMethod = (...args: any[]) => any> = {
|
|
[K in keyof T]: T[K] extends TMethod ? K : never
|
|
}[keyof T]
|
|
|
|
export type Awaited<T> = T extends PromiseLike<infer U> ? U : T
|
|
|
|
export type Integer = TypeTag<'@app.Integer'> & number
|
|
|
|
export function isInteger(num: number): num is Integer {
|
|
return !isNaN(num) && parseInt(String(num), 10) === num
|
|
}
|
|
|
|
export type LaTeXString = TypeTag<'@app.LaTeXString'> & string
|
|
export type HTMLString = TypeTag<'@app.HTMLString'> & string
|
|
export type StatementID = TypeTag<'@app.StatementID'> & string
|
|
export type VariableName = TypeTag<'@app.VariableName'> & string
|
|
export type EvaluatedValue = TypeTag<'@app.EvaluatedValue'> & string
|
|
|
|
export interface EvaluationResult {
|
|
variables: Record<VariableName, any>
|
|
statements: Record<StatementID, any>
|
|
}
|
|
|
|
|
|
export class RichTextBox {
|
|
constructor(
|
|
public text: string = '',
|
|
public x: Number = 0,
|
|
public y: Number = 0,
|
|
) {
|
|
|
|
}
|
|
} |