/* Lexical Analysis with Flex (2.6.0) We used some of the code from this manual */
/*                                    so we placed the citation here. */
/* definitions */
%option noyywrap
%{
#include "typedefs.h"
%}

DIGIT [0-9]
CHAR \\n|\\t|\\'|[^'\n\t\\]
SCHAR \\n|\\t|\\\"|[^\"\n\\]
COM ([^*]|\*+[^)*])*

/* INCOMPLETE */
ID [A-Za-z_][0-9A-Za-z_]*

%%

"(*"{COM}"*)"   {printf("COMMENT:       %s, Token: %d\n", yytext, COMMENT );}       // {return COMMENT}

"integer"       {printf("T_INTEGER      %s, Token: %d\n", yytext, T_INTEGER);}      // {return T_INTEGER}
"address"       {printf("T_ADDRESS      %s, Token: %d\n", yytext, T_ADDRESS);}      // {return T_ADDRESS}
"Boolean"       {printf("T_BOOLEAN      %s, Token: %d\n", yytext, T_BOOLEAN);}      // {return T_BOOLEAN}
"character"     {printf("T_CHARACTER    %s, Token: %d\n", yytext, T_CHARACTER);}    // {return T_CHARACTER}
"string"        {printf("T_STRING       %s, Token: %d\n", yytext, T_STRING);}       // {return T_STRING}

"while"         {printf("WHILE          %s, Token: %d\n", yytext, WHILE);}          // {return WHILE}
"if"            {printf("IF             %s, Token: %d\n", yytext, IF);}             // {return IF}
"then"          {printf("THEN           %s, Token: %d\n", yytext, THEN);}           // {return THEN}
"else"          {printf("ELSE           %s, Token: %d\n", yytext, ELSE);}           // {return ELSE}
"type"          {printf("TYPE           %s, Token: %d\n", yytext, TYPE);}           // {return TYPE}
"function"      {printf("FUNCTION       %s, Token: %d\n", yytext, FUNCTION);}       // {return FUNCTION}
"return"        {printf("RETURN         %s, Token: %d\n", yytext, RETURN);}         // {return RETURN}
"external"      {printf("EXTERNAL       %s, Token: %d\n", yytext, EXTERNAL);}       // {return EXTERNAL}
"as"            {printf("AS             %s, Token: %d\n", yytext, AS);}             // {return AS}

{ID}            {printf("ID:            %s, Token: %d\n", yytext, ID );}            // INCOMPLETE

{DIGIT}+        {printf("C_INTEGER:     %s, Token: %d\n", yytext, atoi( yytext ) );}
"null"          {printf("C_NULL:        %s, Token: %d\n", yytext, atoi( yytext ) );}
'{CHAR}'        {printf("C_CHARACTER:   %s, Token: %d\n", yytext, atoi( yytext ) );}
"true"          {printf("C_TRUE:        %s, Token: %d\n", yytext, atoi( yytext ) );}
"false"         {printf("C_FALSE:       %s, Token: %d\n", yytext, atoi( yytext ) );}
\"{SCHAR}*\"    {printf("C_STRING:      %s, Token: %d\n", yytext, atoi( yytext ) );}
.|\n

%%

int main(int argc, char *argv[]){
        argc--, argv++;
        if ( argc > 0 )
                yyin = fopen( argv[0], "r" );
        else
                yyin = stdin;
        yylex();
}