package cup.example;
import java_cup.runtime.ComplexSymbolFactory;
import java_cup.runtime.ComplexSymbolFactory.Location;
import java_cup.runtime.Symbol;
import java.lang.*;
import java.io.InputStreamReader;

%%

%class Lexer
%implements sym
%public
%unicode
%line
%column
%cup
%char
%{


    public Lexer(ComplexSymbolFactory sf, java.io.InputStream is){
		this(is);
        symbolFactory = sf;
    }
	public Lexer(ComplexSymbolFactory sf, java.io.Reader reader){
		this(reader);
        symbolFactory = sf;
    }

    private StringBuffer sb;
    private ComplexSymbolFactory symbolFactory;
    private int csline,cscolumn;

    public Symbol symbol(String name, int code){
		return symbolFactory.newSymbol(name, code,
						new Location(yyline+1,yycolumn+1, yychar), // -yylength()
						new Location(yyline+1,yycolumn+yylength(), yychar+yylength())
				);
    }
    public Symbol symbol(String name, int code, String lexem){
	return symbolFactory.newSymbol(name, code,
						new Location(yyline+1, yycolumn +1, yychar),
						new Location(yyline+1,yycolumn+yylength(), yychar+yylength()), lexem);
    }

    protected void emit_warning(String message){
    	System.out.println("scanner warning: " + message + " at : 2 "+
    			(yyline+1) + " " + (yycolumn+1) + " " + yychar);
    }

    protected void emit_error(String message){
    	System.out.println("scanner error: " + message + " at : 2" +
    			(yyline+1) + " " + (yycolumn+1) + " " + yychar);
    }
%}

/* comments */
Comment = {TraditionalComment} | {EndOfLineComment}
TraditionalComment = "/*" {CommentContent} \*+ "/"
EndOfLineComment = "//" [^\r\n]* {Newline}
CommentContent = ( [^*] | \*+[^*/] )*

ident = ([:jletter:] | "_" ) ([:jletterdigit:] | [:jletter:] | "_" )*

%eofval{
    return symbolFactory.newSymbol("EOF",sym.EOF);
%eofval}

%state CODESEG

Newline    = \r | \n | \r\n
Whitespace = [ \t\f] | {Newline}
Number     = [0-9]+
Boolean    = (true)|(false)
String     = \"[^\"\n]*\"|\'[^\'\n]*\'
Identifier = [a-zA-Z]+

%%

<YYINITIAL> {
    {Number}        { return symbolFactory.newSymbol("NUMBER", NUMBER, Integer.parseInt(yytext())); }
    {Boolean}       { return symbolFactory.newSymbol("BOOLEAN", BOOLEAN, Boolean.parseBoolean(yytext())); }
    {String}        { return symbolFactory.newSymbol("STRING", STRING, yytext()); }
    {Identifier}    { return symbolFactory.newSymbol("IDENTIFIER", IDENTIFIER, yytext()); }

    "{"          { return symbolFactory.newSymbol("LCB", LCB);      }
    "}"          { return symbolFactory.newSymbol("RCB", RCB);      }
    "["          { return symbolFactory.newSymbol("LSQB", LSQB);    }
    "]"          { return symbolFactory.newSymbol("RSQB", RSQB);    }
    ","          { return symbolFactory.newSymbol("COMMA", COMMA);  }
    ":"          { return symbolFactory.newSymbol("COLON", COLON);  }
}

// error fallback
.|\n          { emit_warning("Unrecognized character '" +yytext()+"' -- ignored"); }