PPT-Lexical Analysis

Hira Waseem Lecture hirawaseemmscs20studentsmcsedupk The Role of the Lexical Analyzer As the first phase of a compiler the main task of the lexical analyzer is to read the input characters of the source program group them into lexemes . Reference. :. Humphrey, S., Love, K., & . Droga. , L. (2011). . Working Grammar: An introduction for secondary English teachers. . Victoria: Pearson.. Lexical cohesion - definitions . Lexical. : (adjective) = the words of a language. 1 Institut f Luca . Cilibrasi. , . Vesna. . Stojanovik. , Patricia Riddell,. . School of Psychology, University of Reading. Minimal pairs. Minimal pairs are defined as pairs of words in a particular language which differ in only one phonological element and have a different meaning (Roach, 2000). Hira. . Waseem. Lecture. hirawaseem.mscs20@students.mcs.edu.pk. The Role of the Lexical Analyzer. As the first phase of a compiler, the main task of the lexical analyzer is . to read . the input characters of the source program, group them into lexemes, . LEXEME. TOKEN. PATTERN. print. print. p,r,i,n,t. (. leftpar. (. 4. number. 4. *. arith. * . 5. number. 5. ). rightpar. ). userAnswer. ID. Letter followed by letters and digits. “Game of Jones”. literal. a`to' alalloall'aiagliallaallecon`with' colcollocoll'coicoglicollacolleda`from' daldallodall'daidaglidalladalledi`of' deldellodell'deideglidelladellein`in' nelnellonell'neineglinellanellesu`on' sulsul SCIHS Berkeley 2014. Andrew Wedel . University of Arizona. Scott Jackson. University of Maryland. Abby Kaplan. University of Utah. Phoneme inventories change over time. 2. Re-revisiting . a very old idea. Vsevolod. . Kapatsinski. University of Oregon. Two kinds of change in Usage-based Phonology. (. Bybee. 1976, . 2001. , 2002), Phillips (1984, 2001). Articulatorily. -motivated sound change. Driven by . a Probabilistic . Lexical . Inference System. . Eyal Shnarch. ,. . Ido . Dagan, Jacob . Goldberger. PLIS - Probabilistic Lexical Inference System. 1. /34. The . entire talk in a single sentence. lexical representations: . a . variationist. perspective . Gregory R. Guy. phonoLAM. group. July 2013. The problem of lexical scope. Some phonological generalizations are valid . only for . a subset of the lexicon . Quick . Quiz – look up answers you don’t know on your iPad. What is orthography?. What is morphology?. Name four invasions and state the impact that they had on the English language.. In Middle English, what was the language of power (law, church, nobility)?. Linguistic Variation. Gregory R. Guy. Pennsylvania State University. 8 November . 2013. Issues, order of presentation. Theories and models: . Bybee. , . Pierrehumbert. ; Exemplar Theory vs. conventional phonology. On. e. . par. t. . o. f. . kn. o. win. g. . th. e. . meaning. s. . o. f. . l. e. x. eme. s. . i. n. . a. n. y. . languag. e. . is th. e. . recognitio. n. . tha. t. . tw. o. . o. r. . mor. We . look at two of the tasks involved in the compilation process. break the source code into lexemes units . (lexical analysis) . the goal is to identify each lexeme and assign it to its proper . token.