Function narrow

packages/search-expression/src/narrow.ts:6–14

(a: Search, b: Search)

import { Search } from './types';

export function narrow(a: Search, b: Search) {
    if (!a) {
        return b;
    }
    const arrs = [a, b].map(ensureSearchExpressionGroupArray);
    const [arrA, arrB] = arrs;
    arrB[0].clause = '&&';
    return arrA.concat(arrB);
}