java.l

java interpreter in formal language and translators

%{
#include <stdlib.h>
//#include "types.h"
#include "y.tab.h"
%}

Separator	        [\(\)\{\}\[\]\;\,\.]

Delimitator	        [\=\>\<\!\+\-\*\/\&\|]

Digit		        [0-9]

Letter	                [a-zA-Z]

AnyButSlash	        [^\/]

AnyButAstr	        [^\*]

AnyButApostrof	        [^\\']

AnyButGhilimele	        [^\\"]
 
BAK		        [\b]
TAB		        [\t]

CR		        [\r]

NL		        [\n]

ESCAPECharacter	        [\\]

Escape	        	[\\]([b]|[t]|[r]|[n]|[\\])

Identifier 	 	{Letter}({Letter}|{Digit})*

CommentMoreLines    	[\/][\*]({AnyButAstr}|[\*]{AnyButSlash})*[\*][\/]

CommentOneLine      [	\/][\/].*

Comment             	({CommentMoreLines}|{CommentOneLine})

WhiteSpace	        ({BAK}|{TAB}|{CR}|{NL}|[ ])

Dimension	        [\[]({WhiteSpace}|{Comment})*[\]]

Sign		        ([\+]|[\-])

Integer             	{Digit}+
 
Numeric             	({Integer})

Character	        [\']({Escape}|{AnyButApostrof})[\']

String	        	[\"]({Escape}|{AnyButGhilimele})*[\"]

Literal             	({Numeric}|{Character}|{String})


%%

"true"		  	{return LITERAL;}
"false"		 	{return LITERAL;}

{Separator}	        {return yytext[0];}

{Delimitator}	  	{return yytext[0];}

"+"                       {return OP_ADD;}
"-"                       {return OP_SUB;}
"*"                       {return OP_MUL;}
"/"                       {return OP_DIV;}
           
"=="		          {return OP_EQ;}
"<="			  {return OP_LE;}
">="		     	  {return OP_GE;}
"!="			  {return OP_NE;}
"||"			  {return OP_Logical_OR;}
"&&"			  {return OP_Logical_AND;}
"++"			  {return OP_INC;}
"--"			  {return OP_DEC;}


"class"		  	{return CLASS;}
"abstract"		  {return ABSTRACT;}
"implements"        	{return IMPLEMENTS;}
"interface"	        {return INTERFACE;}
"extends"		  {return EXTENDS;}

"package"		  {return PACKAGE;}
"import"		  {return IMPORT;}

"public"		  {return PUBLIC;}
"static"		  {return STATIC;}
"private"		  {return PRIVATE;}
"protected"		  {return PROTECTED;}
"final"		  {return FINAL;}

"return"          {return RETURN;}
"void"		  {return VOID;}

"int"	          {return INT;}
"char"		  {return CHAR;}
"boolean"         {return BOOLEAN;}

"super"		  {return SUPER;}
"this"		  {return THIS;}
"null"		  {return JNULL;}

"if"		  {return IF;}
"else"		  {return ELSE;}
"while"		  {return WHILE;}
"do"              return DO;
for		  return FOR;

{Dimension}	  {return OP_DIM;}

{Identifier}	  {return IDENTIFIER;}

{Literal}	   {return LITERAL;}

{WhiteSpace}        {}

{Comment}	    {}