lexer.l

%{
  #include <stdio.h>
  #include <iostream>
  using namespace std;
  int linenumbers = 0;

  extern int yylex();
%}

%option noyywrap
%x comment

%%
[ \t]           ;
[@][0-9]+       { printf("found a constant: %s\n", yytext); return 1; }
^[@][a-zA-Z]+.* { printf("found a variable: %s\n", yytext); return 1; }
^[.*]{1,3}[=]*         { printf("found jump statement")}
\n              { linenumbers++; return 1;                  }
.               ;
"/*"            { BEGIN(comment);                              }
<comment>"*/"   { BEGIN(INITIAL);                              }
<comment>\n     { linenumbers++;                               }
<comment>.      ;
%%

int main(int, char**) {
  // Open a file handle to a particular file:
  FILE *myfile = fopen("../examples/add/Add.asm", "r");
  // Make sure it is valid:
  if (!myfile) {
    cout << "I can't open a.snazzle.file!" << endl;
    return -1;
  }
  // Set Flex to read from it instead of defaulting to STDIN:
  yyin = myfile;
  
  // Parse through the input:
  while(yylex());
  
}