Method parse

lib/javascript/JavascriptParser.js:4980–5065

* Parses the provided source and updates the parser state. * @param {string | Buffer | PreparsedAst} source the source to parse * @param {ParserState} state the parser state * @returns {ParserState} the parser state

(source, state)

	 * @returns {ParserState} the parser state
	 */
	parse(source, state) {
		if (source === null) {
			throw new Error("source must not be null");
		}

		if (Buffer.isBuffer(source)) {
			source = source.toString("utf8");
			// Keep `state.source` as a string so downstream walkers can read
			// the original text without re-decoding the Buffer on every use.
			state.source = source;
		}

		let ast;
		/** @type {Comment[]} */
		let comments;
		/** @type {Set<number>} */
		let semicolons;

		if (typeof source === "object") {
			semicolons = new Set();

			ast = /** @type {Program} */ (source);
			comments = source.comments;
			if (source.semicolons) {
				// Forward semicolon information from the preparsed AST if present
				// This ensures the output is consistent with that of a fresh AST
				for (const pos of source.semicolons) {
					semicolons.add(pos);
				}
			}
		} else {
			({ ast, comments, semicolons } = JavascriptParser._parse(
				source,
				{
					sourceType: this.sourceType,
					locations: true,
					ranges: true,
					comments: true,
					semicolons: true
				},
				this.options.parse
			));
		}

		const oldScope = this.scope;
		const oldState = this.state;
		const oldComments = this.comments;
		const oldSemicolons = this.semicolons;
		const oldStatementPath = this.statementPath;
		const oldPrevStatement = this.prevStatement;
		this.scope = {
			topLevelScope: true,
			inTry: false,
			inShorthand: false,
			inTaggedTemplateTag: false,
			isStrict: false,
			isAsmJs: false,
			terminated: undefined,