All files / src/compiler/phases visitors.js

95.83% Statements 69/72
100% Branches 11/11
66.66% Functions 4/6
95.83% Lines 69/72

Press n or j to go to the next uncovered block, b, p or k for the previous block.

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 732x 2x   2x 2x     2x 2x 2x 2x 2x 2x 2x 2x 2x 14751x 14751x 14751x 14751x 58918x 767154x 767154x 767154x 58918x 14751x 14751x 14751x 14751x 14751x 14751x 585139x 585139x 585139x 585139x 585139x 585139x 585139x 400687x 400687x 400687x 400687x 400687x 1078933x 1078933x 678528x 678528x 678528x 678528x 678528x 678528x 678528x 678528x 314035x 314035x 314035x 678528x 678528x 1078933x 364211x 364211x 1078933x 400687x 400687x 400687x 585139x 585139x 585139x 585139x 14751x 14751x 14751x  
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  {...import('zimmerframe').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 {import('zimmerframe').Visitors<T, U>} */
	// @ts-expect-error
	const combined = {};
 
	for (const key in visitors) {
		const fns = visitors[key];
 
		/**
		 * @param {T} node
		 * @param {import('zimmerframe').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;
}