packages/astro-parser/src/parse/state/fragment.ts


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import tag from './tag.js';
import setup from './setup.js';
import mustache from './mustache.js';
import text from './text.js';
import codefence from './codefence.js';
import codespan from './codespan.js';
import { Parser } from '../index.js';

export default function fragment(parser: Parser) {
	if (parser.html.children.length === 0 && parser.match_regex(/^---/m)) {
		return setup;
	}

	// Fenced code blocks are pretty complex in the GFM spec
	// https://github.github.com/gfm/#fenced-code-blocks
	if (parser.match_regex(/[`~]{3,}/)) {
		return codefence;
	}
	if (parser.match_regex(/(?<!\\)`{1,2}/)) {
		return codespan;
	}

	if (parser.match('<')) {
		return tag;
	}

	if (parser.match('{')) {
		return mustache;
	}

	return text;
}