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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
// @flow
import type {
Grip,
ObjectFront,
LongStringFront,
ExpressionResult,
} from "../client/firefox/types";
function isFront(result: ExpressionResult): boolean %checks {
return !!result && typeof result === "object" && !!result.getGrip;
}
export function getGrip(
result: ExpressionResult
): Grip | string | number | null {
if (isFront(result)) {
return result.getGrip();
}
return result;
}
export function getFront(
result: ExpressionResult
): ObjectFront | LongStringFront | null {
return isFront(result) ? result : null;
}
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