Method generate

packages/svelte/src/compiler/phases/scope.js:710–742

* @param {string} preferred_name * @returns {string}

(preferred_name)

	 * @returns {string}
	 */
	generate(preferred_name) {
		if (this.#porous) {
			return /** @type {Scope} */ (this.parent).generate(preferred_name);
		}

		preferred_name = preferred_name.replace(/[^a-zA-Z0-9_$]/g, '_').replace(/^[0-9]/, '_');

		// Use cached counter to skip names already known to be taken (avoids O(n²) scanning)
		let n = this.root.next_counter(preferred_name);
		let name;

		if (n === 0) {
			name = preferred_name;
			n = 1;
		} else {
			name = `${preferred_name}_${n}`;
			n++;
		}

		while (
			this.references.has(name) ||
			this.declarations.has(name) ||
			this.root.conflicts.has(name) ||
			is_reserved(name)
		) {
			name = `${preferred_name}_${n++}`;
		}

		this.root.set_counter(preferred_name, n);
		this.references.set(name, []);
		this.root.conflicts.add(name);
		return name;
	}

	/**
	 * @param {string} name