Linter Demo

Errors: 2

Warnings: 1

File: /home/fstrocco/Dart/dart/benchmark/petitparser/example/lispshell/lispshell.dart

library petitparser.example.lispshell; import 'dart:io'; import 'dart:async'; import 'dart:convert'; import 'package:petitparser/petitparser.dart'; import 'package:petitparser/lisp.dart'; /// Read, evaluate, print loop. void evalInteractive(Parser parser, Environment env, Stream<String> input, IOSink output, IOSink error) { output.write('>> '); input.listen((String line) { try { output.writeln('=> ${evalString(parser, env, line)}'); } on ParserError catch (exception) { error.writeln('Parser error: ' + exception.toString()); } on Error catch (exception) { error.writeln(exception.toString()); } output.write('>> '); }); } /// Entry point for the command line interpreter. void main(List<String> arguments) { // default options var standardLibrary = true; var interactiveMode = false; var files = new List(); // parse arguments for (var option in arguments) { if (option.startsWith('-') && files.isEmpty) { if (option == '-n') { standardLibrary = false; } else if (option == '-i') { interactiveMode = true; } else if (option == '-?') { print('${Platform.executable} lisp.dart -n -i [files]'); print(' -i enforces the interactive mode'); print(' -n does not load the standard library'); exit(0); } else { print('Unknown option: $option'); exit(1); } } else { var file = new File(option); if (file.existsSync()) { files.add(file); } else { print('File not found: $option'); exit(2); } } } // evaluation context var environment = Natives.import(new Environment()); // add additional primitives environment.define(new Name('exit'), (env, args) => exit(args == null ? 0 : args.head)); environment.define(new Name('sleep'), (env, args) => sleep(new Duration(milliseconds: args.head))); // process standard library if (standardLibrary) { environment = Standard.import(environment.create()); } // create empty context environment = environment.create(); // process files given as argument files.forEach((file) { evalString(lispParser, environment, file.readAsStringSync()); }); // process console input if (interactiveMode || files.isEmpty) { var input = stdin .transform(SYSTEM_ENCODING.decoder) .transform(new LineSplitter()); evalInteractive(lispParser, environment, input, stdout, stderr); } }