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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 15354x 15354x 15354x 15354x 61322x 882976x 882976x 882976x 61322x 15354x 15354x 15354x 15354x 15354x 15354x 631841x 631841x 631841x 631841x 631841x 631841x 631841x 428450x 428450x 428450x 428450x 428450x 1153289x 1153289x 725136x 725136x 725136x 725136x 725136x 725136x 725136x 725136x 335470x 335470x 335470x 725136x 725136x 1153289x 389369x 389369x 1153289x 428450x 428450x 428450x 631841x 631841x 631841x 631841x 15354x 15354x 15354x | /** @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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