CLI: add parse-plain

package.json

@@ -12,6 +12,7 @@
     "tsc": "tsc",
     "tsd": "tsd",
     "parse": "node ./built/cli/parse",
+    "parse-plain": "node ./built/cli/parsePlain",
     "test": "mocha -r ts-node/register 'test/**/*.ts' && npm run tsd"
   },
   "repository": {

src/cli/parsePlain.ts

+import { performance } from 'perf_hooks';
+import inputLine, { InputCanceledError } from './misc/inputLine';
+import { parsePlain } from '..';
+
+async function entryPoint() {
+	console.log('intaractive plain parser');
+
+	while (true) {
+		let input: string;
+		try {
+			input = await inputLine('> ');
+		}
+		catch (err) {
+			if (err instanceof InputCanceledError) {
+				console.log('bye.');
+				return;
+			}
+			throw err;
+		}
+
+		// replace special chars
+		input = input
+			.replace(/\\n/g, '\n')
+			.replace(/\\t/g, '\t')
+			.replace(/\\u00a0/g, '\u00a0');
+
+		try {
+			const parseTimeStart = performance.now();
+			const result = parsePlain(input);
+			const parseTimeEnd = performance.now();
+			console.log(JSON.stringify(result));
+			const parseTime = (parseTimeEnd - parseTimeStart).toFixed(3);
+			console.log(`parsing time: ${parseTime}ms`);
+		}
+		catch (err) {
+			console.log('parsing error:');
+			console.log(err);
+		}
+		console.log();
+	}
+}
+entryPoint()
+.catch(err => {
+	console.log(err);
+	process.exit(1);
+});