Function declarationStartLikely

lib/css/syntax.js:2473–2505

(ts)

 * @returns {boolean} true if consume-a-declaration's step 1 + step 3 would both succeed on the current input
 */
const declarationStartLikely = (ts) => {
	const t = ts.next();
	if (t.type !== TT_IDENTIFIER) return false;
	const input = ts.input;
	const len = input.length;
	let pos = t.end;
	for (;;) {
		if (pos >= len) return false;
		const cc = input.charCodeAt(pos);
		if (_isWhiteSpace(cc)) {
			pos++;
			continue;
		}
		// Skip a `/* … */` comment (the tokenizer filters comments between tokens).
		if (cc === CC_SOLIDUS && input.charCodeAt(pos + 1) === CC_ASTERISK) {
			pos += 2;
			while (
				pos < len &&
				!(
					input.charCodeAt(pos) === CC_ASTERISK &&
					input.charCodeAt(pos + 1) === CC_SOLIDUS
				)
			) {
				pos++;
			}
			pos += 2;
			continue;
		}
		// `:` is always a standalone <colon-token>, so the next significant char
		// being `:` is equivalent to the next token being a <colon-token>.
		return cc === CC_COLON;
	}
};

/**
 * Consume a block's contents, CSS Syntax Level 3 [§5.4.5](https://drafts.csswg.org/css-syntax/#consume-block-contents). Per tabatkins/parse-css.js reference impl: returns separate `decls` and `rules` flat lists, both preserved on EOF / `}` (the spec text's "Return rules" single-list model drops trailing decls because there's no implicit flush before EOF / `}`).