Add grammar mappings to help message

These should be quite useful since I forget what the mappings are
sometimes, and maybe want to make a custom grammar.

1 files changed, 5 insertions, 1 deletions

diff --git a/passgen.c b/passgen.c
index ae2b19d..6f3670d 100644
--- a/passgen.c
+++ b/passgen.c
@@ -140,8 +140,12 @@ Usage: %s\n\
 Hints:\n\
   - No arguments generates with the default grammar.\n\
   - If three numbers are provided, a password will be generated in the 'standard form', <triplets><symbols><numbers>.\n\
-Compile-time options:\n\
+Compile-time options (edit `config.h` to customise!):\n\
   - Default grammar: %s\n", argv[0], argv[0], argv[0], grammar_buf);
+            printf("  - Grammar mappings:\n");
+            for (int i = 0; i < classes_n; ++i) {
+                printf("    - '%c' => \"%s\"\n", classes[i].c, classes[i].letters);
+            }
             return 0;
         }
         /* Take first argument as the grammar */