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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 | 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 15187x 15187x 15187x 15187x 60656x 842908x 842908x 842908x 60656x 15187x 15187x 15187x 15187x 15187x 15187x 609663x 609663x 609663x 609663x 609663x 609663x 609663x 416100x 416100x 416100x 416100x 416100x 1123358x 1123358x 707551x 707551x 707551x 707551x 707551x 707551x 707551x 707551x 327532x 327532x 327532x 707551x 707551x 1123358x 379726x 379726x 1123358x 416100x 416100x 416100x 609663x 609663x 609663x 609663x 15187x 15187x 15187x | /** @import { Visitors, Context } from 'zimmerframe' */
const overrides = {
visit() {
throw new Error('Cannot call visit() during analysis');
},
stop() {
throw new Error('Cannot call stop() during analysis');
}
};
/**
* @template {{ type: string }} T
* @template U
* @param {...Visitors<T, U>} tasks
* @returns
*/
export function merge(...tasks) {
/** @type {Record<string, any[]>} */
const visitors = {};
for (const task of tasks) {
for (const key in task) {
if (!visitors[key]) visitors[key] = [];
visitors[key].push(task[key]);
}
}
/** @type {Visitors<T, U>} */
// @ts-expect-error
const combined = {};
for (const key in visitors) {
const fns = visitors[key];
/**
* @param {T} node
* @param {Context<T, U>} context
*/
function visitor(node, context) {
/**
* @param {number} i
* @param {U} state
*/
function go(i, state) {
const fn = fns[i];
if (!fn) return context.next(state);
let called_next = false;
fn(node, {
...context,
...overrides,
state,
next(next_state = state) {
called_next = true;
go(i + 1, next_state);
}
});
if (!called_next) {
go(i + 1, state);
}
}
go(0, context.state);
}
// @ts-expect-error
combined[key] = visitor;
}
return combined;
}
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