add in as an operator

src/lexer/lex.l

@@ -30,6 +30,7 @@ int yywrap(void * unused_param) {
 "^="                { return TOKEN_ASSIGN_CARET; }
 
 "not"[ \t]+"in"     { return TOKEN_NOT_IN; }
+"in"                { return TOKEN_IN; }
 "&&"                { return TOKEN_AND; }
 "||"                { return TOKEN_OR; }
 "<="                { return TOKEN_LE; }
@@ -65,7 +66,6 @@ int yywrap(void * unused_param) {
 "null"              { return TOKEN_NULL; }
 "delete"            { return TOKEN_DELETE; }
 "not"               { return TOKEN_NOT; }
-"in"                { return TOKEN_IN; }
 "try"               { return TOKEN_TRY; }
 "catch"             { return TOKEN_CATCH; }
 
@@ -86,11 +86,11 @@ int yywrap(void * unused_param) {
     return TOKEN_STRING;
 }
 
-\-?((([0-9]+(\.[0-9]+)?)|(\.[0-9]+))(e((\-|\+)?([0-9]+(\.[0-9]+)?)))?) {
+((([0-9]+(\.[0-9]+)?)|(\.[0-9]+))(e((\-|\+)?([0-9]+(\.[0-9]+)?)))?) {
     return TOKEN_NUMBER;
 }
 
-\n { return TOKEN_NEW_LINE; }
+"\n" { return TOKEN_NEW_LINE; }
 
 [ \t]+ {
     GET_STATE

src/lexer/token.h

@@ -34,7 +34,8 @@ typedef enum {
   TOKEN_GE,       // >=
   TOKEN_EQ,       // ==
   TOKEN_NE,       // !=
-  TOKEN_NOT_IN,   // not in (Usually treated like a comparison)
+  TOKEN_NOT_IN,   // not in
+  TOKEN_IN,       // in
   TOKEN_AND,      // &&
   TOKEN_OR,       // ||
 
@@ -57,7 +58,6 @@ typedef enum {
   TOKEN_NULL,
   TOKEN_DELETE,
   TOKEN_NOT,
-  TOKEN_IN,
   TOKEN_TRY,
   TOKEN_CATCH,