Berry python compat for ranges

lib/libesp32/Berry/src/be_parser.c

@@ -1074,7 +1074,11 @@ static void sub_expr(bparser *parser, bexpdesc *e, int prio)
         be_code_prebinop(finfo, op, e); /* and or */
         init_exp(&e2, ETVOID, 0);
         sub_expr(parser, &e2, binary_op_prio(op));  /* parse right side */
-        check_var(parser, &e2);  /* check if valid */
+        if ((e2.type == ETVOID) && (op == OptConnect)) {
+            init_exp(&e2, ETINT, -1);
+        } else {
+            check_var(parser, &e2);  /* check if valid */
+        }
         be_code_binop(finfo, op, e, &e2, -1); /* encode binary op */
         op = get_binop(parser);  /* is there a following binop? */
     }

lib/libesp32/Berry/tests/lexer.be

@@ -38,7 +38,7 @@ check(45.e+2, 4500)
 
 test_source('x = 5; 0...x;', 'unexpected symbol near \'.\'')
 test_source('x = 5; 0...x;', 'unexpected symbol near \'.\'')
-test_source('45..', 'unexpected symbol near \'EOS\'')
+# test_source('45..', 'unexpected symbol near \'EOS\'')
 test_source('0xg', 'invalid hexadecimal number')
 test_source('"\\x5g"', 'invalid hexadecimal number')
 test_source('0x5g', 'malformed number')

lib/libesp32/Berry/tests/string.be

@@ -34,3 +34,8 @@ assert(s.format("%i%%", 12) == "12%")
 assert(s.format("%i%%%i", 12, 13) == "12%13")
 assert(s.format("%s%%", "foo") == "foo%")
 assert(s.format("%.1f%%", 3.5) == "3.5%")
+
+s="azerty"
+assert(s[1..2] == "ze")
+assert(s[1..] == "zerty")
+assert(s[1..-1] == "zerty")