bas.c: commentary for allow_hex_const (before I forget what it does).

1 files changed, 10 insertions, 0 deletions

diff --git a/bas.c b/bas.c
index 595ed97..4bad870 100644
--- a/bas.c
+++ b/bas.c
@@ -10,8 +10,18 @@
 
 #include "bas.h"
 
+/* caller's parse_args() should set this for the -v option */
 int verbose = 0;
+
+/* hex constants work the same way in Turbo BASIC and BASIC XL/XE: they're
+   exactly like numeric constants, 6-byte BCD FP, but introduced with
+   OP_HEXCONST instead of OP_NUMCONST.
+   If allow_hex_const is set, on_exp_token will be called for OP_HEXCONST.
+	Otherwise, a warning will be printed, on_exp_token will NOT be called,
+   but the constant is skipped the same as a regular numeric, to keep
+   in sync with the token stream. */
 int allow_hex_const = 0;
+
 unsigned short lomem;
 unsigned short vntp;
 unsigned short vntd;