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package AST;
import beaver.Symbol;
import beaver.Scanner;
import AST.LabCommParser.Terminals;
%%
%public
%final
%class LabCommScanner
%extends Scanner
%type Symbol
%function nextToken
%yylexthrow Scanner.Exception
%unicode
%line %column
%{
StringBuffer strbuf = new StringBuffer(128);
private Symbol sym(short id) {
return new Symbol(id, yyline + 1, yycolumn + 1, len(), str());
}
private Symbol sym(short id, String value) {
return new Symbol(id, yyline + 1, yycolumn + 1, len(), value);
}
private String str() { return yytext(); }
private int len() { return yylength(); }
%}
LineTerminator = \n|\r|\r\n
InputCharacter = [^\r\n]
WhiteSpace = [ ] | \t | \f | {LineTerminator}
Comment = {TraditionalComment}
| {EndOfLineComment}
TraditionalComment = "/*" [^*] ~"*/" | "/*" "*"+ "/" | "/*" "*"+ [^/*] ~"*/"
EndOfLineComment = "//" {InputCharacter}* {LineTerminator}?
Identifier = [:jletter:][:jletterdigit:]*
DecimalNumeral = 0 | {NonZeroDigit} {Digits}?
Digits = {Digit}+
Digit = 0 | {NonZeroDigit}
NonZeroDigit = [1-9]
%%
<YYINITIAL> {
{WhiteSpace} { }
{Comment} { }
"sample" { return sym(Terminals.SAMPLE); }
"typedef" { return sym(Terminals.TYPEDEF); }
"struct" { return sym(Terminals.STRUCT); }
"void" { return sym(Terminals.VOID); }
"boolean" { return sym(Terminals.BOOLEAN); }
"byte" { return sym(Terminals.BYTE); }
"short" { return sym(Terminals.SHORT); }
"int" { return sym(Terminals.INT); }
"long" { return sym(Terminals.LONG); }
"float" { return sym(Terminals.FLOAT); }
"double" { return sym(Terminals.DOUBLE); }
"string" { return sym(Terminals.STRING); }
{DecimalNumeral} { return sym(Terminals.INTEGER_LITERAL); }
"_" { return sym(Terminals.UNDERSCORE); }
"{" { return sym(Terminals.LBRACE); }
"}" { return sym(Terminals.RBRACE); }
"[" { return sym(Terminals.LBRACK); }
"]" { return sym(Terminals.RBRACK); }
";" { return sym(Terminals.SEMICOLON); }
"," { return sym(Terminals.COMMA); }
{Identifier} { return sym(Terminals.IDENTIFIER); }
}
// fall through errors
.|\n { throw new RuntimeException("Illegal character \""+str()+ "\" at line "+yyline+", column "+yycolumn); }
<<EOF>> { return sym(Terminals.EOF); }