Java Lexical Error
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Lexical Error In English
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A Lexical Error, Detected By The Scanner
each other. Join them; it only takes a minute: Sign up What are some examples of errors a lexical analyzer could detect? up vote 1 down vote favorite 2 What are some examples of errors a lexical analyzer could detect in a given piece of code in a language like Java, C++ or C? compiler-construction lexical-analysis share|improve static semantic error java this question asked Oct 6 '09 at 15:26 tatsuhirosatou 5,905112732 add a comment| 3 Answers 3 active oldest votes up vote 2 down vote accepted A lexer can detect sequences of characters that have no possible meaning (where meaning is determined by the parser). For example, in Java, the sequence bana"na cannot be an identifier, a keyword, an operator, etc. However, a lexer cannot detect that a given lexically valid token is meaningless or ungrammatical. So a Java lexer, for example, would happily return the sequence of tokens final "banana" final "banana", seeing a keyword, a string constant, a keyword, and a string constant respectively. share|improve this answer answered Oct 6 '09 at 15:30 Jonathan Feinberg 31.4k36586 add a comment| up vote 0 down vote I haven't double-checked the grammar but I think that a string like "2cat", for example, isn't any kind of valid/expected/categorizable token. share|improve this answer answered Oct 6 '09 at 15:31 ChrisW 42.3k569156 add a comment| up vote 0 down vote In addition to the cases me
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Lexical Error Linguistics
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Difference Between Lexical Error And Syntax Error
Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, lexical phase errors in compiler design just like you, helping each other. Join them; it only takes a minute: Sign up What are some examples of errors a lexical analyzer could detect? up vote 1 down vote favorite 2 What are some examples http://stackoverflow.com/questions/1526333/what-are-some-examples-of-errors-a-lexical-analyzer-could-detect of errors a lexical analyzer could detect in a given piece of code in a language like Java, C++ or C? compiler-construction lexical-analysis share|improve this question asked Oct 6 '09 at 15:26 tatsuhirosatou 5,905112732 add a comment| 3 Answers 3 active oldest votes up vote 2 down vote accepted A lexer can detect sequences of characters that have no possible meaning (where meaning is determined by the parser). For example, in Java, the sequence bana"na http://stackoverflow.com/questions/1526333/what-are-some-examples-of-errors-a-lexical-analyzer-could-detect cannot be an identifier, a keyword, an operator, etc. However, a lexer cannot detect that a given lexically valid token is meaningless or ungrammatical. So a Java lexer, for example, would happily return the sequence of tokens final "banana" final "banana", seeing a keyword, a string constant, a keyword, and a string constant respectively. share|improve this answer answered Oct 6 '09 at 15:30 Jonathan Feinberg 31.4k36586 add a comment| up vote 0 down vote I haven't double-checked the grammar but I think that a string like "2cat", for example, isn't any kind of valid/expected/categorizable token. share|improve this answer answered Oct 6 '09 at 15:31 ChrisW 42.3k569156 add a comment| up vote 0 down vote In addition to the cases mentioned below, most compilers also handle comments in the lexer. So, errors wrt comments (improperly nested, not closed) could also be detected here. Another issue is the case of user-defined data types, which need to be handled together by the lexer and the parser. Consider the following code: typedef int myinteger; myinteger x; In the second statement, myinteger is a data type, and the lexer should return myinteger as a datatype, not as an indentifier. This is generally done by cross-referencing a potential indentifier with a list user-defined data types that had previously been populated by the parser. A third issue conce
semantic and logical errors rambhakt sharma SubscribeSubscribedUnsubscribe271271 Loading... Loading... Working... Add to Want to watch this again later? Sign in to add this video to a playlist. Sign in Share More Report Need to report the video? Sign in to report inappropriate https://www.youtube.com/watch?v=0fS7yPZxI-U content. Sign in Transcript Statistics 2,038 views 8 Like this video? Sign in to make your opinion count. Sign in 9 2 Don't like this video? Sign in to make your opinion count. Sign in http://sonarqube-archive.15.x6.nabble.com/TokenMgrError-Lexical-error-at-line-50-column-35-Encountered-quot-ufffd-quot-65533-after-quot-quot-td3195420.html 3 Loading... Loading... Transcript The interactive transcript could not be loaded. Loading... Loading... Rating is available when the video has been rented. This feature is not available right now. Please try again later. Published on lexical error Jan 19, 2015A school course in compilers. Category People & Blogs License Standard YouTube License Created using YouTube Video Editor Source videos View attributions Show more Show less Loading... Advertisement Autoplay When autoplay is enabled, a suggested video will automatically play next. Up next Intro to Lexical Analysis - Duration: 11:45. Oresoft LWC 29,657 views 11:45 Computational Linguistics I: Lexical Semantics - Duration: 24:49. Jordan Boyd-Graber 3,150 views 24:49 Lecture 3.3: static semantic error The 20 Most Common Grammar and Mechanical Errors - Duration: 24:49. English 191 22,588 views 24:49 Basicblk and flow graphs - Duration: 4:05. Parkavi Anbusubramanian 1,467 views 4:05 Lexical Semantic Relations - Duration: 3:27. Timothy Mills 3,908 views 3:27 Mod-05 Lec-17 Intermediate code generation Part 1 - Duration: 55:49. nptelhrd 20,649 views 55:49 General Grammar Concept: Lexical & Grammatical Words - Duration: 10:44. Edward Meade 5,658 views 10:44 What is Syntax Directed Translation (SDT) - Duration: 8:21. Bhavesh Nande 7,522 views 8:21 error recovery in compilers - Duration: 5:00. rambhakt sharma 948 views 5:00 Unit 0 Lesson 2 Common Errors and Primitive Operators - Duration: 13:21. AP Computer Science @ Excel High School 236 views 13:21 Symbol Table: Introduction - Duration: 5:34. IT Miner - Free Computer Tutorial Videos 2,319 views 5:34 Syntax and Semantics Session 1 Part 1 - Duration: 23:53. ThinQ 1,861 views 23:53 Programming Errors (C++) - Duration: 9:03. ReelLearning 9,353 views 9:03 token, pattern and lexeme in compilers - Duration: 5:56. rambhakt sharma 3,250 views 5:56 1 مقدمة 4 بناء وتركيب الجمل البرمجية فى لغات البرمجة - Duration: 5:45. ehab ragab 5,517 views 5:45 Compilers 06-01: Error Handling - Duration: 13:03. Online Courses 3,059 views 13:03 Mod-01 Lec-01 An Overview of a Compiler - Duration: 55:54. nptelhrd
› Classic List Threaded ♦ ♦ Locked 9 messages Buckel, Wolfgang Reply | Threaded Open this post in threaded view ♦ ♦ | Report Content as Inappropriate ♦ ♦ TokenMgrError: Lexical error at line 50, column 35. Encountered: "\ufffd" (65533), after : "" TokenMgrError: Lexical error at line 50, column 35. Encountered: "\ufffd" (65533), after : "" I get this error under Windows with Sonar 1.4.2 when a java file with German umlauts is run through CPD (see attachment). The maven build stops with an error and unfortunately gathering of sonar measures fails completely (would be nice if it simply ignored failed sub tasks). This seems to be related to http://jira.codehaus.org/browse/MPMD-58. However, Sonar already uses the fix version 2.3 of maven-pmd-plugin. Also pmd:pmd reports a warning but at least doesn't fail. ([INFO] [pmd:pmd] [WARNING] Error while processing N:\tmc\dvp\qle\src\com\sitraffic\tmc\qle\cfg\qle\GeraetefachverwaltungEnum.java: Lexical error at line 44, column 15. Encountered: "\ufffd" (65533), after : "" ) I've also tried to run maven/sonar with -Dfile.encoding=UTF-8 but that doesn't change anything. Any ideas? Help appreciated. With best regards, Wolfgang Buckel Siemens AG Industry Sector I MO TS R&D SE Hofmannstr. 51 81379 Muenchen, Germany Tel.: +49 (89) 722-22370 Fax: +49 (89) 722-44477 Mobile: +49 (172) 8421190 [hidden email] Siemens Aktiengesellschaft: Chairman of the Supervisory Board: Gerhard Cromme; Managing Board: Peter Loescher, Chairman, President and Chief Executive Officer; Wolfgang Dehen, Heinrich Hiesinger, Joe Kaeser, Jim Reid-Anderson, Hermann Requardt, Siegfried Russwurm, Peter Y. Solmssen; Registered offices: Berlin and Munich; Commercial registries: Berlin Charlottenburg, HRB 12300, Munich, HRB 6684; WEEE-Reg.-No. DE 23691322 Important notice: This e-mail and any attachment thereof contain corporate proprietary information. If you have received it by mistake, please notify us immediately by reply e-mail and delete this e-mail and its attachments from your system. Thank you. Buckel, Wolfgang Reply | Threaded Open this post in threaded view ♦ ♦ | Report Content as Inappropriate ♦ ♦ RE: TokenMgrError: Lexical error at line 50, column 35. Encountered: "\ufffd" (65533), after : "" TokenMgrError: Lexical error at line 50, column 35. Encountered: "\ufffd" (65533), after : "" Oops, forgot attachment. From: Buckel, Wolfgang Sent: Tuesday, October 14, 2008 1:30 PMTo: [hidden email]Subject: [sonar-user] TokenMgrError: Lexical error at line 50, column 35. Encountered: "\uf