Lexicon Error
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Lexical Error Example Java
for our own designed programming language. I am using jflex and cup as my generators but i'm a bit stuck with what a lexical error is. Also, is it recommended that i use the state feature of jflex? it feels wrong as it seems like the parser is better suited to handling that aspect. and do you recommend any other tools to create the language. I'm sorry if i'm impatient but it's due on tuesday. compiler-theory jflex share|improve this question asked Aug 14 lexical error in compiler design '10 at 18:57 cesar 2,414103052 add a comment| 4 Answers 4 active oldest votes up vote 11 down vote accepted A lexical error is any input that can be rejected by the lexer. This generally results from token recognition falling off the end of the rules you've defined. For example (in no particular syntax): [0-9]+ ===> NUMBER token [a-zA-Z] ===> LETTERS token anything else ===> error! If you think about a lexer as a finite state machine that accepts valid input strings, then errors are going to be any input strings that do not result in that finite state machine reaching an accepting state. The rest of your question was rather unclear to me. If you already have some tools you are using, then perhaps you're best to learn how to achieve what you want to achieve using those tools (I have no experience with either of the tools you mentioned). EDIT: Having re-read your question, there's a second part I can answer. It is possible that a language could have no lexical errors - it's the language in which any input string at all is valid input. share|improve this answer edited Aug 15 '10 at 17:34 answered Aug 14 '10 at 23:41 Gian 10.9k3043 add a comment| up vote 2 down vote A lexical error could be an invalid or unacceptable character by the language, like '@' which is rejected as a lexical error for identifiers in Java (it's reserved). Lexical errors are the errors thro
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Argentina Australia Brazil Canada France Germany India Indonesia Italy Malaysia Mexico New Zealand Philippines Quebec Singapore Taiwan Hong Kong Spain Thailand United States Vietnam Espanol About About Answers Community http://stackoverflow.com/questions/3484689/what-is-an-example-of-a-lexical-error-and-is-it-possible-that-a-language-has-no Guidelines Leaderboard Knowledge Partners Points & Levels Blog Safety Tips Education & Reference Words & Wordplay Next What is the difference between a lexical and grammatical error? Follow 1 answer 1 Report Abuse Are you sure that you want to delete this answer? Yes No Sorry, something has gone wrong. Trending Now Answers Best Answer: A lexical https://uk.answers.yahoo.com/question/index?qid=20101028174855AArmLB2 error is making the wrong choice of word for the stylistic context. The word is roughly correct, but wrong in 'flavour'. For instance, wrong level of formality: "The kidneys are paired organs with several functions. They serve homeostatic functions such as the regulation of electrolytes and maintenance of acid-base balance; they also produce wee-wee" (See here http://books.google.co.uk/books?id=7UPAr... for typical forms of lexical error in learners of English). A grammatical error is when you actually break the rules for grammatical structure in the language. For instance, "The two mans came into the room" (wrong plural formation) or "That were me you saw" (wrong verb form for standard English singular past tense). Source(s): RAY G · 6 years ago 1 Thumbs up 0 Thumbs down Comment Add a comment Submit · just now Report Abuse For the best answers, search on this site https://shorturl.im/ptgYu A spelling error is simply spelling a word incorrectly - inkorrektly. A garmmatical error is hard to define. . . it can be using the wrong f
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