Merge pull request #4 from UB-CSE443/Sprint1-Type/Keywards-FE-t#07

Sprint1 type/keywards fe t#07

lexicalStructure.lex

@@ -7,7 +7,7 @@
 %{ 
 #include "typedefs.h" 
 %}
-
+        int line_number = 1, column_number = 1;
 
 DIGIT [0-9]
 CHAR \\n|\\t|\\'|[^'\n\t\\]
@@ -21,15 +21,35 @@ COMMENTCHAR [^\*]|\*[^\)]
 %%
 
 
+\n      line_number++ column_number = 1;
+.       column_number++;
+
+"integer"       {return T_INTEGER}
+"address"       {return T_ADDRESS}
+"Boolean"       {return T_BOOLEAN}
+"character"     {return T_CHARACTER}
+
+
 	/* rules */
 {DIGIT}+ {printf( "C_INTEGER: %s (%d)\n", yytext, atoi( yytext ) );}
 
 "null" {printf( "C_NULL: %s (%d)\n", yytext, atoi( yytext ) );}
 
+"while"         {return WHILE}
+"if"            {return IF}
+"then"          {return THEN}
+"else"          {return ELSE}
+"type"          {return TYPE}
+"function"      {return FUNCTION}
+"return"        {return RETURN}
+"external"      {return EXTERNAL}
+"as"            {return AS}
+
 '{CHAR}' {printf( "C_CHARACTER: %s (%d)\n", yytext, atoi( yytext ) );} /*using double \ per documentation to show escaped chars*/
 
 "true" {printf( "C_TRUE: %s (%d)\n", yytext, atoi( yytext ) );}
 
+
 "false" {printf( "C_FALSE: %s (%d)\n", yytext, atoi( yytext ) );}
 
 	/* OPERATORS */