import {ImpType} from '../core/Dispatcher.js'
import type {UnderlyingReal} from '../Complex/type.js'

export const number_type = {
   before: ['Complex'],
   test: (n: unknown): n is number => typeof n === 'number',
   from: {string: s => +s}
}


export interface NumbersImpTypes {
   zero: (a: number) => 0
   one: (a: number) => 1
   nan: (a: number) => typeof NaN
   re: (a: number) => number
}

export const zero: ImpType<'zero', [number]> = a => 0
export const one:  ImpType<'one',  [number]> = a => 1
export const nan:  ImpType<'nan',  [number]> = a => NaN
export const re:   ImpType<'re',   [number]> = a => a