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Lexer.lex
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import java_cup.runtime.*;
%%
%public
%class Lexer
%unicode
/*%standalone*/
%cup
%line
%column
%{
private Symbol symbol(int type) {
return new Symbol(type, yyline, yycolumn);
}
private Symbol symbol(int type, Object value) {
return new Symbol(type, yyline, yycolumn, value);
}
%}
lineTerminator = \r|\n|\r\n
inputCharacter = [^\r\n]
whiteSpace = {lineTerminator} | [ \t\f]
multiLineComment = "/#" ({whiteSpace}|{inputCharacter}|{whiteSpace}|{lineTerminator})* "#/"
endOfLineComment = "#" {inputCharacter}* {lineTerminator}?
COMMENT = {multiLineComment} | {endOfLineComment}
CHAR_V = "\'"([\\]?.)?"\'"
BOOL_V = [T|F]
INT_V = (0|[1-9])[0-9]*
FLOAT_V = [0-9]+\.[0-9]+
RAT_V = ([0-9]+_)?[0-9]+\/[0-9]+
SEMI = ";"
COMMA = ","
MAIN = "main"
ASSOP = ":="
CONCAT = "::"
COLON = ":"
DOT = "."
IF = "if"
THEN = "then"
ELSE = "else"
RPAREN = ")"
LPAREN = "("
RBRACE = "}"
LBRACE = "{"
READ = "read"
PRINT = "print"
WHILE = "while"
FORALL = "forall"
RETURN = "return"
IN = "in"
TDEF = "tdef"
FDEF = "fdef"
FI = "fi"
DO = "do"
OD = "od"
PLUS = "+"
MINUS = "-"
MULT = "*"
DIV = "/"
EXP = "^"
AND = "&&"
OR = "||"
IMPL = "=>"
EQ = "="
LTEQ = "<="
LT = "<"
GTEQ = ">="
GT = ">"
NOTEQ = "!="
NOT = "!"
LSQB = "["
RSQB = "]"
LEN = "len"
RAT = "rat"
INT = "int"
FLOAT = "float"
CHAR = "char"
TOP = "top"
SEQ = "seq"
DICT = "dict"
BOOL = "bool"
ALIAS = "alias"
ID = [a-zA-Z][0-9a-zA-Z_]*
STRING= \"[^\"]*\"
QUOTE = \"
%%
{COMMENT} {/* ignore */}
{whiteSpace} {/* ignore */}
{CHAR_V} { return symbol(sym.CHAR_V,new String(yytext()));}
{BOOL_V} { return symbol(sym.BOOL_V, new String(yytext()));}
{INT_V} { return symbol(sym.INT_V, new Integer(yytext()));}
{FLOAT_V} { return symbol(sym.FLOAT_V, new Float(yytext()));}
{RAT_V} { return symbol(sym.RAT_V, new String(yytext()));}
/*Keywords*/
{MAIN} { return symbol(sym.MAIN); }
{THEN} { return symbol(sym.THEN);}
{ELSE} { return symbol(sym.ELSE);}
{READ} { return symbol(sym.READ);}
{PRINT} { return symbol(sym.PRINT);}
{WHILE} { return symbol(sym.WHILE);}
{FORALL} { return symbol(sym.FORALL);}
{RETURN} { return symbol(sym.RETURN);}
{IN} { return symbol(sym.IN);}
{TDEF} { return symbol(sym.TDEF);}
{FDEF} { return symbol(sym.FDEF);}
{FI} { return symbol(sym.FI);}
{DO} { return symbol(sym.DO);}
{OD} { return symbol(sym.OD);}
{LEN} { return symbol(sym.LEN);}
{IF} { return symbol(sym.IF);}
/* Operator */
{ASSOP} { return symbol(sym.ASSOP);}
{CONCAT} { return symbol(sym.CONCAT);}
{PLUS} { return symbol(sym.PLUS);}
{MINUS} { return symbol(sym.MINUS);}
{MULT} { return symbol(sym.MULT);}
{DIV} { return symbol(sym.DIV);}
{EXP} { return symbol(sym.EXP);}
{AND} { return symbol(sym.AND);}
{OR} { return symbol(sym.OR);}
{IMPL} { return symbol(sym.IMPL);}
{EQ} { return symbol(sym.EQ);}
{LTEQ} { return symbol(sym.LTEQ);}
{LT} { return symbol(sym.LT);}
{GTEQ} { return symbol(sym.GTEQ);}
{GT} { return symbol(sym.GT);}
{NOTEQ} { return symbol(sym.NOTEQ);}
{NOT} { return symbol(sym.NOT);}
{COLON} { return symbol(sym.COLON);}
{DOT} { return symbol(sym.DOT);}
/* Types */
{RAT} { return symbol(sym.RAT);}
{INT} { return symbol(sym.INT);}
{FLOAT} { return symbol(sym.FLOAT);}
{CHAR} { return symbol(sym.CHAR);}
{TOP} { return symbol(sym.TOP);}
{SEQ} { return symbol(sym.SEQ);}
{DICT} { return symbol(sym.DICT);}
{BOOL} { return symbol(sym.BOOL);}
/* Separator */
{RBRACE} { return symbol(sym.RBRACE);}
{LBRACE} { return symbol(sym.LBRACE);}
{RPAREN} { return symbol(sym.RPAREN);}
{LPAREN} { return symbol(sym.LPAREN);}
{LSQB} { return symbol(sym.LSQB);}
{RSQB} { return symbol(sym.RSQB);}
{SEMI} { return symbol(sym.SEMI);}
{COLON} { return symbol(sym.COLON);}
{COMMA} { return symbol(sym.COMMA);}
{ALIAS} { return symbol(sym.ALIAS);}
{STRING} { return symbol(sym.STRING,new String(yytext()));}
{ID} { return symbol(sym.ID,new String(yytext()));}
[^] { System.out.println("Syntax error at line "+ yyline+1 + ", column "+ yycolumn);
throw new Error("Illegal character <"+
yytext()+">");
}