/**
 * @packageDocumentation
 * @module Utility
 */
import { MonoTypeOperatorFunction, Subscribable } from 'rxjs';
import { SupportedTemperatures } from '../types/temperature';
/**
 * Returns an Observable that emits a number based on the version of the source value through [[Temperatures]]
 * conversion
 *
 * @remarks This operator does not handle validation on temperature values (e.g. negative Kelvin values)
 *
 * @category Conversion
 *
 * @typeParam I String or [[Temperatures]] value for the input value
 * @typeParam O String or [[Temperatures]] value for the output value
 *
 * @param fromTemperature The temperature type to convert from
 * @param toTemperature The temperature type to convert from
 * @param precision The number of decimal places to return, default is `1`
 *
 * @example
 * Convert a source of numbers from Celsius to Fahrenheit
 * ```ts
 * const source$ = from([0, 100, 37.5, -42]);
 *
 * source$.pipe(temperature(Temperatures.CELSIUS, Temperatures.FAHRENHEIT)).subscribe()
 * ```
 * Output: `32, 212, 99.5, -43.6`
 *
 * @example
 * Convert a source of numbers from Kelvin to Celsius with precision `2`
 * ```ts
 * const source$ = from([0, 100, 273.15, 10000]);
 *
 * source$.pipe(temperature('kelvin', 'celsius', 2)).subscribe()
 * ```
 * Output: `-273,15, -173.15, 0, 9726.85`
 *
 * @returns Observable that emits a number that is the `from` [[Temperatures]] converted to the `to` [[Temperatures]]
 */
export declare function temperature<I extends SupportedTemperatures, O extends SupportedTemperatures>(fromTemperature: Subscribable<I> | I, toTemperature: Subscribable<O> | O, precision?: Subscribable<number> | number): MonoTypeOperatorFunction<number>;