Method parse

lib/css/CssParser.js:873–3676

* 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 (Buffer.isBuffer(source)) {
			source = source.toString("utf8");
		} else if (typeof source === "object") {
			throw new Error("webpackAst is unexpected for the CssParser");
		}
		if (source[0] === "\uFEFF") {
			source = source.slice(1);
		}

		// Per-parse comment side-array — kept local (like HtmlParser) so nothing is retained on the reused parser instance between modules.
		/** @type {Comment[]} */
		const comments = [];

		const module = state.module;

		// All `:export`-style exports are collected into a single
		// `CssIcssExportDependency` per module (emitted at parse end) instead of one
		// `Dependency` per export — far fewer retained objects on CSS-heavy builds.
		/** @type {import("../dependencies/CssIcssExportDependency").CssExportEntry[]} */
		const cssExportEntries = [];
		/**
		 * @param {number} sl start line
		 * @param {number} sc start column
		 * @param {number} el end line
		 * @param {number} ec end column
		 * @param {string} name export name
		 * @param {import("../dependencies/CssIcssExportDependency").Value} value value or [localName, importName, request?]
		 * @param {Range=} range source range to replace, when present
		 * @param {boolean=} interpolate whether the value needs interpolation
		 * @param {import("../dependencies/CssIcssExportDependency").ExportMode=} exportMode export mode
		 * @param {import("../dependencies/CssIcssExportDependency").ExportType=} exportType export type
		 * @returns {void}
		 */
		const addCssExport = (
			sl,
			sc,
			el,
			ec,
			name,
			value,
			range,
			interpolate = false,
			exportMode = CssIcssExportDependency.EXPORT_MODE.REPLACE,
			exportType = CssIcssExportDependency.EXPORT_TYPE.NORMAL
		) => {
			cssExportEntries.push({
				name,
				value,
				range,
				interpolate,
				exportMode,
				exportType,
				loc: { start: { line: sl, column: sc }, end: { line: el, column: ec } }
			});
		};

		const parsedModuleResource = parseResource(