import type { PerseusStrings } from "../../strings";
import type { PerseusNumericInputAnswerForm, PerseusNumericInputWidgetOptions } from "@khanacademy/perseus-core";
/**
 * Generates the specific set of examples for the current question.
 * This string is shown as examples to the user in a tooltip.
 */
export declare const generateExamples: (answerForms: readonly PerseusNumericInputAnswerForm[], strings: PerseusStrings) => ReadonlyArray<string>;
/**
 * Determines whether to show examples of how to input the various supported answer forms.
 * We do not show examples if all forms are accepted or if no forms are accepted.
 */
export declare const shouldShowExamples: (answerForms: readonly PerseusNumericInputAnswerForm[]) => boolean;
/**
 * Takes a list of lists of answer forms, and returns a list of the forms
 * in each of these lists in the same order that they're listed in the
 * `formExamples` forms from above.
 */
export declare const unionAnswerForms: (answerFormsList: ReadonlyArray<ReadonlyArray<PerseusNumericInputAnswerForm>>) => ReadonlyArray<PerseusNumericInputAnswerForm>;
/**
 * Filter out the correct answers and map them to the answer forms
 * so that we can generate the examples for the widget.
 */
export declare function normalizeCorrectAnswerForms(answers: PerseusNumericInputWidgetOptions["answers"]): ReadonlyArray<PerseusNumericInputAnswerForm>;