ps2/1: finish scanner

ps2/src/scanner.l

@@ -12,13 +12,15 @@
 %option array
 %option yylineno
 
-WHITESPACE [ \t\v\r\n]
+WHITESPACE [ \v\t\n\r]
 COMMENT \/\/[^\n]+
 QUOTED \"([^\"\n]|\\\")*\"
+NUMERIC ^[0-9]+$
+BINDING ^[a-zA-Z]+[a-zA-Z0-9_]*$
 
 %%
-{WHITESPACE}+           { /* Eliminate whitespace */ }
 {COMMENT}               { /* Eliminate comments */ }
+{WHITESPACE}+           { /* Eliminate whitespace */ }
 {QUOTED}                { return STRING_TOKEN; }
 
 /*
@@ -39,5 +41,18 @@ QUOTED \"([^\"\n]|\\\")*\"
  */
 
   /* All other chars get returned as single char tokens */
+{func}                  { return FUNC; }
+{var}                   { return VAR; }
+{return}                { return RETURN; }
+{print}                 { return PRINT; }
+{println}               { return PRINTLN; }
+{if}                    { return IF; }
+{else}                  { return ELSE; }
+{while}                 { return WHILE; }
+{break}                 { return BREAK; }
+{and}                   { return AND; }
+{or}                    { return OR; }
+{NUMERIC}               { return NUMBER_TOKEN; }
+{BINDING}               { return IDENTIFIER_TOKEN; }
 .                       { return yytext[0]; }
 %%