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Lecture 4

# Cup lecture 1 lecture 1 course course mechanics by

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Unformatted text preview: ken(Token.LPAREN); getch();! return result; ! case ‘)': result = new Token(Token.RPAREN); getch();! return result;! case ‘;': result = new Token(Token.SCOLON); getch();! return result;! // Repeat for other single character tokens…! Winter 2013 UW CSE 401 (Michael Ringenburg) 32 16 1/14/13 getToken() (2) CSE341: Programming CSE341: Programming Languages Languages case '!': // ! or !=! getch();! Lecture 1 Lecture 1 if (nextch == '=') {! C Token.NEQ result = newMechanics Mechanics Course Token(ourse ); getch(); ! return result;! ML Variable Bindings } elseL{Variable Bindings M! result = new Token(Token.NOT); return result;! }! Dan Grossman !! Dan Grossman case '<': // < or <=! Fall 2011 Fall 2011 getch();! if (nextch == '=') {! result = new Token(Token.LEQ); getch();! return result;! } else {! result = new Token(Token.LESS); return result;! }! ! Winter 2013 UW CSE 401 (Michael Ringenburg) 33 getToken() (3) CSE341: Programming CSE341: Programming Languages Languages case '0': case '1': case '2': case '3': case '4': ! case '5': case ecture 1 Lecture 1 L '6': case '7': case '8': case '9': ! // integer constant! ourse Mechanics C String Cum = nextch;! n ourse Mechanics ML Variable Bindings ML getch();!Variable Bindings while (Character.isdigit(nextch)) {! num = num an Grossman Dan Grossman D + nextch;! Fall 2011 getch();! Fall 2011 }! result = new Token(Token.INT,! Integer(num).intValue());! retur...
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