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package crux;
public class Token {
public static enum Kind {
AND("and"),
OR("or"),
NOT("not"),
ADD("+"),
SUB("-"),
MUL("*"),
DIV("/"),
IDENTIFIER(),
INTEGER(),
FLOAT(),
ERROR(),
EOF(),
LET("let"),
VAR("var"),
ARRAY("array"),
FUNC("func"),
IF("if"),
ELSE("else"),
WHILE("while"),
TRUE("true"),
FALSE("false"),
RETURN("return"),
OPEN_PAREN("("),
CLOSE_PAREN(")"),
OPEN_BRACE("{"),
CLOSE_BRACE("}"),
OPEN_BRACKET("["),
CLOSE_BRACKET("]"),
GREATER_EQUAL(">="),
LESSER_EQUAL("<="),
NOT_EQUAL("!="),
EQUAL("=="),
GREATER_THAN(">"),
LESS_THAN("<"),
ASSIGN("="),
COMMA(","),
SEMICOLON(";"),
COLON(":"),
CALL("::");
private String default_lexeme;
Kind()
{
default_lexeme = "";
}
Kind(String lexeme)
{
default_lexeme = lexeme;
}
public boolean hasStaticLexeme()
{
return default_lexeme != null;
}
// OPTIONAL: if you wish to also make convenience functions, feel free
// for example, boolean matches(String lexeme)
// can report whether a Token.Kind has the given lexeme
}
private int lineNum;
private int charPos;
Kind kind;
private String lexeme = "";
// OPTIONAL: implement factory functions for some tokens, as you see fit
public static Token EOF(int linePos, int charPos)
{
Token tok = new Token(linePos, charPos);
tok.kind = Kind.EOF;
return tok;
}
public static Token Integer(String lexeme, int linePos, int charPos)
{
Token tok = new Token(linePos, charPos);
tok.kind = Kind.INTEGER;
tok.lexeme = lexeme;
return tok;
}
public static Token Float(String lexeme, int linePos, int charPos)
{
Token tok = new Token(linePos, charPos);
tok.kind = Kind.FLOAT;
tok.lexeme = lexeme;
return tok;
}
public static Token Identifier(String lexeme, int linePos, int charPos)
{
Token tok = new Token(linePos, charPos);
tok.kind = Kind.IDENTIFIER;
tok.lexeme = lexeme;
return tok;
}
/*
public static Token OpenParen(int linePos, int charPos)
{
Token tok = new Token(linePos, charPos);
tok.kind = Kind.OPEN_PAREN;
return tok;
}
public static Token CloseParen(int linePos, int charPos)
{
Token tok = new Token(linePos, charPos);
tok.kind = Kind.CLOSE_PAREN;
return tok;
}
public static Token OpenBrace(int linePos, int charPos)
{
Token tok = new Token(linePos, charPos);
tok.kind = Kind.OPEN_BRACE;
return tok;
}
public static Token CloseBrace(int linePos, int charPos)
{
Token tok = new Token(linePos, charPos);
tok.kind = Kind.CLOSE_BRACE;
return tok;
}
public static Token OpenBracket(int linePos, int charPos)
{
Token tok = new Token(linePos, charPos);
tok.kind = Kind.OPEN_BRACKET;
return tok;
}
public static Token CloseBracket(int linePos, int charPos)
{
Token tok = new Token(linePos, charPos);
tok.kind = Kind.CLOSE_BRACKET;
return tok;
}
public static Token Add(int linePos, int charPos)
{
Token tok = new Token(linePos, charPos);
tok.kind = Kind.ADD;
return tok;
}
public static Token Sub(int linePos, int charPos)
{
Token tok = new Token(linePos, charPos);
tok.kind = Kind.SUB;
return tok;
}
public static Token Mul(int linePos, int charPos)
{
Token tok = new Token(linePos, charPos);
tok.kind = Kind.MUL;
return tok;
}
public static Token Div(int linePos, int charPos)
{
Token tok = new Token(linePos, charPos);
tok.kind = Kind.DIV;
return tok;
}
public static Token Assign(int linePos, int charPos)
{
Token tok = new Token(linePos, charPos);
tok.kind = Kind.ASSIGN;
return tok;
}
public static Token Comma(int linePos, int charPos)
{
Token tok = new Token(linePos, charPos);
tok.kind = Kind.COMMA;
return tok;
}
public static Token SemiColon(int linePos, int charPos)
{
Token tok = new Token(linePos, charPos);
tok.kind = Kind.SEMICOLON;
return tok;
}
public static Token Colon(int linePos, int charPos)
{
Token tok = new Token(linePos, charPos);
tok.kind = Kind.COLON;
return tok;
}
public static Token Call(int linePos, int charPos)
{
Token tok = new Token(linePos, charPos);
tok.kind = Kind.CALL;
return tok;
}
public static Token GreaterThan(int linePos, int charPos)
{
Token tok = new Token(linePos, charPos);
tok.kind = Kind.GREATER_THAN;
return tok;
}
public static Token GreaterEqual(int linePos, int charPos)
{
Token tok = new Token(linePos, charPos);
tok.kind = Kind.GREATER_EQUAL;
return tok;
}
public static Token LessThan(int linePos, int charPos)
{
Token tok = new Token(linePos, charPos);
tok.kind = Kind.LESS_THAN;
return tok;
}
public static Token LesserEqual(int linePos, int charPos)
{
Token tok = new Token(linePos, charPos);
tok.kind = Kind.LESSER_EQUAL;
return tok;
}
public static Token NotEqual(int linePos, int charPos)
{
Token tok = new Token(linePos, charPos);
tok.kind = Kind.NOT_EQUAL;
return tok;
}
public static Token Equal(int linePos, int charPos)
{
Token tok = new Token(linePos, charPos);
tok.kind = Kind.EQUAL;
return tok;
}
*/
private Token(int lineNum, int charPos)
{
this.lineNum = lineNum;
this.charPos = charPos;
// if we don't match anything, signal error
this.kind = Kind.ERROR;
this.lexeme = "No Lexeme Given";
}
public Token(String lexeme, int lineNum, int charPos)
{
this.lineNum = lineNum;
this.charPos = charPos;
// TODO: based on the given lexeme determine and set the actual kind
switch (lexeme)
{
case "and":
this.kind = Kind.AND;
this.lexeme = lexeme;
break;
case "or":
this.kind = Kind.OR;
this.lexeme = lexeme;
break;
case "not":
this.kind = Kind.NOT;
this.lexeme = lexeme;
break;
case "let":
this.kind = Kind.LET;
this.lexeme = lexeme;
break;
case "var":
this.kind = Kind.VAR;
this.lexeme = lexeme;
break;
case "array":
this.kind = Kind.ARRAY;
this.lexeme = lexeme;
break;
case "func":
this.kind = Kind.FUNC;
this.lexeme = lexeme;
break;
case "if":
this.kind = Kind.IF;
this.lexeme = lexeme;
break;
case "else":
this.kind = Kind.ELSE;
this.lexeme = lexeme;
break;
case "while":
this.kind = Kind.WHILE;
this.lexeme = lexeme;
break;
case "true":
this.kind = Kind.TRUE;
this.lexeme = lexeme;
break;
case "false":
this.kind = Kind.FALSE;
this.lexeme = lexeme;
break;
case "return":
this.kind = Kind.RETURN;
this.lexeme = lexeme;
break;
case "(":
this.kind = Kind.OPEN_PAREN;
this.lexeme = lexeme;
break;
case ")":
this.kind = Kind.CLOSE_PAREN;
this.lexeme = lexeme;
break;
case "{":
this.kind = Kind.OPEN_BRACE;
this.lexeme = lexeme;
break;
case "}":
this.kind = Kind.CLOSE_BRACE;
this.lexeme = lexeme;
break;
case "[":
this.kind = Kind.OPEN_BRACKET;
this.lexeme = lexeme;
break;
case "]":
this.kind = Kind.CLOSE_BRACKET;
this.lexeme = lexeme;
break;
case "+":
this.kind = Kind.ADD;
this.lexeme = lexeme;
break;
case "-":
this.kind = Kind.SUB;
this.lexeme = lexeme;
break;
case "*":
this.kind = Kind.MUL;
this.lexeme = lexeme;
break;
case "/":
this.kind = Kind.DIV;
this.lexeme = lexeme;
break;
case ">=":
this.kind = Kind.GREATER_EQUAL;
this.lexeme = lexeme;
break;
case "<=":
this.kind = Kind.LESSER_EQUAL;
this.lexeme = lexeme;
break;
case "!=":
this.kind = Kind.NOT_EQUAL;
this.lexeme = lexeme;
break;
case "==":
this.kind = Kind.EQUAL;
this.lexeme = lexeme;
break;
case ">":
this.kind = Kind.GREATER_THAN;
this.lexeme = lexeme;
break;
case "<":
this.kind = Kind.LESS_THAN;
this.lexeme = lexeme;
break;
case "=":
this.kind = Kind.ASSIGN;
this.lexeme = lexeme;
break;
case ",":
this.kind = Kind.COMMA;
this.lexeme = lexeme;
break;
case ";":
this.kind = Kind.SEMICOLON;
this.lexeme = lexeme;
break;
case ":":
this.kind = Kind.COLON;
this.lexeme = lexeme;
break;
case "::":
this.kind = Kind.CALL;
this.lexeme = lexeme;
break;
default:
this.kind = Kind.ERROR;
this.lexeme = "Unrecognized lexeme: " + lexeme;
}
/*
if (lexeme == "and")
{
this.kind = Kind.AND;
this.lexeme = lexeme;
}
else if (lexeme == "or")
{
this.kind = Kind.OR;
this.lexeme = lexeme;
}
else if (lexeme == "not")
{
this.kind = Kind.NOT;
this.lexeme = lexeme;
}
else if (lexeme == "let")
{
this.kind = Kind.LET;
this.lexeme = lexeme;
}
else if (lexeme == "var")
{
this.kind = Kind.VAR;
this.lexeme = lexeme;
}
else if (lexeme == "array")
{
this.kind = Kind.ARRAY;
this.lexeme = lexeme;
}
else if (lexeme == "func")
{
this.kind = Kind.FUNC;
this.lexeme = lexeme;
}
else if (lexeme == "if")
{
this.kind = Kind.IF;
this.lexeme = lexeme;
}
else if (lexeme == "else")
{
this.kind = Kind.ELSE;
this.lexeme = lexeme;
}
else if (lexeme == "while")
{
this.kind = Kind.WHILE;
this.lexeme = lexeme;
}
else if (lexeme == "true")
{
this.kind = Kind.TRUE;
this.lexeme = lexeme;
}
else if (lexeme == "false")
{
this.kind = Kind.FALSE;
this.lexeme = lexeme;
}
else if (lexeme == "return")
{
this.kind = Kind.RETURN;
this.lexeme = lexeme;
}
// if we don't match anything, signal error
else
{
this.kind = Kind.ERROR;
this.lexeme = "Unrecognized lexeme: " + lexeme;
}
*/
}
public int lineNumber()
{
return lineNum;
}
public int charPosition()
{
return charPos;
}
// Return the lexeme representing or held by this token
public String lexeme()
{
// TODO: implement
return this.kind.toString();
}
public String toString()
{
// TODO: implement this
if (this.kind == Kind.ERROR || this.kind == Kind.FLOAT || this.kind == Kind.IDENTIFIER || this.kind == Kind.INTEGER)
return this.lexeme() + "(" + this.lexeme + ")(lineNum:" + this.lineNumber() + ", charPos:" + this.charPosition() + ")";
return this.lexeme() + "(lineNum:" + this.lineNumber() + ", charPos:" + this.charPosition() + ")";
}
// OPTIONAL: function to query a token about its kind
// boolean is(Token.Kind kind)
public boolean is(Token.Kind kind)
{
return kind == this.kind;
}
public Token.Kind kind()
{
return kind;
}
// OPTIONAL: add any additional helper or convenience methods
// that you find make for a clean design
}