public void SkipTokenTest() { Lexicon lexicon = new Lexicon(); Lexer global = lexicon.Lexer; Lexer keywords = global.CreateSubLexer(); Lexer xml = keywords.CreateSubLexer(); var ID = global.DefineToken(RE.Range('a', 'z').Concat( (RE.Range('a', 'z') | RE.Range('0', '9')).Many())); var NUM = global.DefineToken(RE.Range('0', '9').Many1()); var WHITESPACE = global.DefineToken(RE.Symbol(' ').Many()); var ERROR = global.DefineToken(RE.Range(Char.MinValue, (char)255)); var IF = keywords.DefineToken(RE.Literal("if")); var ELSE = keywords.DefineToken(RE.Literal("else")); var XMLNS = xml.DefineToken(RE.Literal("xmlns")); ScannerInfo info = lexicon.CreateScannerInfo(); PeekableScanner scanner = new PeekableScanner(info); string source = "asdf04a 1107 else Z if vvv xmlns 772737"; StringReader sr = new StringReader(source); scanner.SetSource(new SourceReader(sr)); scanner.SetTriviaTokens(WHITESPACE.Index, ERROR.Index); info.CurrentLexerIndex = xml.Index; Lexeme l1 = scanner.Read(); Assert.AreEqual(ID.Index, l1.TokenIndex); Assert.AreEqual("asdf04a", l1.Value.Content); Assert.AreEqual(0, l1.PrefixTrivia.Count); Lexeme l2 = scanner.Read(); Assert.AreEqual(NUM.Index, l2.TokenIndex); Assert.AreEqual("1107", l2.Value.Content); Assert.AreEqual(1, l2.PrefixTrivia.Count); Lexeme l3 = scanner.Read(); Assert.AreEqual(ELSE.Index, l3.TokenIndex); Assert.AreEqual("else", l3.Value.Content); Assert.AreEqual(1, l2.PrefixTrivia.Count); Lexeme l4 = scanner.Read(); Assert.AreEqual(IF.Index, l4.TokenIndex); Assert.AreEqual("if", l4.Value.Content); Assert.AreEqual(3, l4.PrefixTrivia.Count); int p1 = scanner.Peek(); Assert.AreEqual(ID.Index, p1); int p2 = scanner.Peek2(); int p3 = scanner.Peek(3); int peof = scanner.Peek(4); Assert.AreEqual(info.EndOfStreamTokenIndex, peof); Lexeme l6 = scanner.Read(); Lexeme l7 = scanner.Read(); Assert.AreEqual(XMLNS.Index, l7.TokenIndex); Lexeme l8 = scanner.Read(); Assert.AreEqual(NUM.Index, l8.TokenIndex); Lexeme leof = scanner.Read(); Assert.AreEqual(info.EndOfStreamTokenIndex, leof.TokenIndex); Assert.AreEqual(leof.Value.Span.StartLocation.CharIndex, leof.Value.Span.EndLocation.CharIndex); Assert.AreEqual(source.Length, leof.Value.Span.StartLocation.CharIndex); }
public void ErrorRecoveryTest() { Lexicon lexicon = new Lexicon(); Lexer global = lexicon.Lexer; var ID = global.DefineToken(RE.Range('a', 'z').Concat( (RE.Range('a', 'z') | RE.Range('0', '9')).Many())); var NUM = global.DefineToken(RE.Range('0', '9').Many1()); var WHITESPACE = global.DefineToken(RE.Symbol(' ').Many()); ScannerInfo info = lexicon.CreateScannerInfo(); PeekableScanner scanner = new PeekableScanner(info); string source = "asdf04a 1107 !@#$!@ Z if vvv xmlns 772737"; StringReader sr = new StringReader(source); scanner.SetSource(new SourceReader(sr)); scanner.SetTriviaTokens(WHITESPACE.Index); scanner.RecoverErrors = true; CompilationErrorManager em = new CompilationErrorManager(); em.DefineError(101, 0, CompilationStage.Scanning, "Invalid token: {0}"); scanner.ErrorManager = em; scanner.LexicalErrorId = 101; Lexeme l1 = scanner.Read(); Assert.AreEqual(ID.Index, l1.TokenIndex); Lexeme l2 = scanner.Read(); Assert.AreEqual(NUM.Index, l2.TokenIndex); Assert.AreEqual(0, em.Errors.Count); Lexeme l3 = scanner.Read(); Assert.AreEqual(ID.Index, l3.TokenIndex); Assert.IsTrue(em.Errors.Count > 0); Assert.AreEqual(101, em.Errors[0].Info.Id); }