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Programming languages case a case z id or keyword

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Unformatted text preview: 29 Implemen:ng a Scanner by Hand – Token Representa:on C tagged s Programming •  A CSE341: imple, SE341: tructure token is a s Programming Languages Languages –  (Compilers wriwen in C/C++ oqen use a “tagged union” style structure) Lecture 1 Lecture 1 public class Token {! Course C kind; // token’s Mechanics public int ourse Mechanicslexical class! public int intVal;// integer value Bindings = INT! ML Variable if class ML Variable Bindings public String id;!// actual identifier if class = ID! ! Dan Grossman // lexical classes! Dan Grossman public static final int EOF Fall 2011// “end of file”! = 0; Fall 2011 // token! public static final int ID = 1; // identifier,! // not keyword! public static final int INT = 2; // integer! public static final int LPAREN = 4; // (! public static final int SCOLN = 5; // ;! public static final int WHILEK = 6; // )! // etc. etc. etc. …! Winter 2013 UW CSE 401 (Michael Ringenburg) 30 15 1/14/13 Simple Scanner Ex...
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